{"id":66561,"date":"2026-08-10T08:00:05","date_gmt":"2026-08-09T23:00:05","guid":{"rendered":"https:\/\/norimen.net\/?p=66561"},"modified":"2026-08-08T19:32:06","modified_gmt":"2026-08-08T10:32:06","slug":"tinh-toan-vat-lieu-khung-doc","status":"publish","type":"post","link":"https:\/\/norimen.net\/vi\/slope-frame-material-calculation\/","title":{"rendered":"T\u00ednh to\u00e1n v\u1eadt li\u1ec7u trong c\u00f4ng t\u00e1c l\u00e0m v\u00e1n khu\u00f4n | T\u00ednh to\u00e1n to\u00e0n b\u1ed9 kh\u1ed1i l\u01b0\u1ee3ng l\u01b0\u1edbi th\u00e9p, c\u1ed1t th\u00e9p, v\u00e1n khu\u00f4n, neo, v\u1eefa v\u00e0 c\u00e1t th\u00f4ng qua c\u00e1c v\u00ed d\u1ee5 t\u00ednh to\u00e1n"},"content":{"rendered":"<p>Xin ch\u00e0o m\u1ecdi ng\u01b0\u1eddi.<\/p>\n<p>\u0110\u00e2y l\u00e0 Enta.<\/p>\n<p>Tr\u01b0\u1edbc \u0111\u00e2y, c\u00f3 m\u1ed9t kho\u1ea3ng th\u1eddi gian t\u00f4i \u0111\u00e3 vi\u1ebft l\u00ea th\u00ea v\u1ec1 c\u00e1ch t\u00ednh to\u00e1n v\u1eadt li\u1ec7u cho khung ph\u00e1p l\u00fd, chia th\u00e0nh 7 ph\u1ea7n t\u1eeb \u201cPh\u1ea7n 1\u201d \u0111\u1ebfn \u201cPh\u1ea7n 7\u201d (c\u01b0\u1eddi)<\/p>\n<p>Ph\u1ea7n v\u1ec1 l\u01b0\u1edbi th\u00e9p, ph\u1ea7n v\u1ec1 d\u1ea7m d\u1ecdc, ph\u1ea7n v\u1ec1 d\u1ea7m ngang, ph\u1ea7n v\u1ec1 v\u00e1n khu\u00f4n, ph\u1ea7n v\u1ec1 neo, ph\u1ea7n v\u1ec1 xi m\u0103ng, ph\u1ea7n v\u1ec1 c\u00e1t. C\u00f3 nh\u1eefng l\u1ea7n t\u00f4i t\u1ef1 vi\u1ebft r\u1ed3i l\u1ea1i ch\u1ee3t nh\u1edb ra gi\u1eefa ch\u1eebng: \u201c\u00c0, c\u00f3 lo\u1ea1t b\u00e0i n\u00e0y nh\u1ec9\u201d.<\/p>\n<p>Ch\u00ednh t\u00e1c gi\u1ea3 c\u0169ng \u0111\u00e3 vi\u1ebft nh\u01b0 v\u1eady, n\u00ean t\u00f4i ngh\u0129 ng\u01b0\u1eddi \u0111\u1ecdc ch\u1eafc h\u1eb3n c\u00f2n kh\u00f3 t\u00ecm hi\u1ec3u h\u01a1n n\u1eefa.<\/p>\n<p>V\u00ec v\u1eady, l\u1ea7n n\u00e0y t\u00f4i c\u0169ng \u0111\u00e3 g\u1ed9p 7 cu\u1ed1n l\u1ea1i th\u00e0nh 1 cu\u1ed1n.<\/p>\n<p>Nh\u00e2n ti\u1ec7n, t\u00f4i \u0111\u00e3 d\u00f9ng m\u00e1y t\u00ednh \u0111\u1ec3 t\u00ednh l\u1ea1i to\u00e0n b\u1ed9 c\u00e1c ph\u00e9p t\u00ednh h\u1ed3i \u0111\u00f3, n\u00ean nh\u1eefng ch\u1ed7 sai c\u0169ng \u0111\u00e3 \u0111\u01b0\u1ee3c s\u1eeda l\u1ea1i r\u1ed3i w<\/p>\n<p>Th\u00f4i, quay l\u1ea1i ch\u1ee7 \u0111\u1ec1 ch\u00ednh<\/p>\n<p>Vi\u1ec7c t\u00ednh to\u00e1n v\u1eadt li\u1ec7u cho gi\u00e0n v\u00e1n (gi\u00e0n v\u00e1n \u0111\u1ed5 b\u00ea t\u00f4ng t\u1ea1i c\u00f4ng tr\u01b0\u1eddng) v\u1ec1 c\u01a1 b\u1ea3n l\u00e0 qu\u00e1 tr\u00ecnh t\u00ednh to\u00e1n t\u1eeb hai con s\u1ed1 l\u00e0 \u201cdi\u1ec7n t\u00edch\u201d v\u00e0 \u201cchi\u1ec1u d\u00e0i v\u00e1ch\u201d \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh l\u01b0\u1ee3ng v\u1eadt li\u1ec7u c\u1ea7n thi\u1ebft cho t\u1eebng ph\u1ea7n.<\/p>\n<p>M\u1ed9t khi \u0111\u00e3 hi\u1ec3u \u0111\u01b0\u1ee3c \u0111i\u1ec1u n\u00e0y, ph\u1ea7n c\u00f2n l\u1ea1i ch\u1ec9 l\u00e0 ph\u00e9p nh\u00e2n v\u00e0 ph\u00e9p chia m\u00e0 th\u00f4i.<\/p>\n<p>Trong b\u00e0i n\u00e0y, ch\u00fang ta s\u1ebd gi\u1ea3 \u0111\u1ecbnh m\u1ed9t c\u00f4ng tr\u01b0\u1eddng th\u1ef1c t\u1ebf v\u00e0 ti\u1ebfn h\u00e0nh c\u00e1c c\u00f4ng \u0111o\u1ea1n t\u1eeb l\u01b0\u1edbi th\u00e9p \u0111\u1ebfn c\u00e1t m\u1ed9t c\u00e1ch li\u00ean t\u1ee5c.<\/p>\n<p>Tuy nhi\u00ean, tr\u01b0\u1edbc ti\u00ean t\u00f4i xin n\u00f3i r\u00f5 r\u1eb1ng,<strong>\u0110\u00e2y ch\u1ec9 l\u00e0 vi\u1ec7c t\u00ednh to\u00e1n v\u1eadt li\u1ec7u nh\u1eb1m ph\u1ee5c v\u1ee5 cho c\u00f4ng vi\u1ec7c th\u1ef1c t\u1ebf t\u1ea1i c\u00f4ng tr\u01b0\u1eddng. Do \u0111\u00f3, s\u1ebd c\u00f3 m\u1ed9t s\u1ed1 kh\u00e1c bi\u1ec7t so v\u1edbi vi\u1ec7c l\u1eadp d\u1ef1 to\u00e1n v\u00e0 thi\u1ebft k\u1ebf.<\/strong><\/p>\n<p>C\u00e1c con s\u1ed1 \u0111\u01b0\u1ee3c n\u00eau ra \u1edf \u0111\u00e2y l\u00e0 nh\u1eefng gi\u00e1 tr\u1ecb ti\u00eau bi\u1ec3u m\u00e0 t\u00f4i th\u01b0\u1eddng s\u1eed d\u1ee5ng t\u1ea1i hi\u1ec7n tr\u01b0\u1eddng, c\u0169ng nh\u01b0 nh\u1eefng gi\u00e1 tr\u1ecb th\u01b0\u1eddng xu\u1ea5t hi\u1ec7n trong t\u00e0i li\u1ec7u thi\u1ebft k\u1ebf.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-66563\" src=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2026\/08\/43cafb0e44824b01c75104e317b4b1a5.jpg\" alt=\"Vi\u1ec7c t\u00ednh to\u00e1n v\u1eadt li\u1ec7u cho k\u1ebft c\u1ea5u khung b\u1eaft \u0111\u1ea7u t\u1eeb chi\u1ec1u d\u00e0i c\u1ea1nh v\u00e0 di\u1ec7n t\u00edch tr\u00ean b\u1ea3n v\u1ebd\" width=\"600\" height=\"338\" \/><\/p>\n<h3>5 con s\u1ed1 c\u1ea7n n\u1eafm r\u00f5 tr\u01b0\u1edbc ti\u00ean | N\u1ebfu ch\u01b0a x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c nh\u1eefng con s\u1ed1 n\u00e0y th\u00ec kh\u00f4ng th\u1ec3 \u0111\u01b0a ra th\u00f4ng tin<\/h3>\n<p>Tr\u01b0\u1edbc khi cung c\u1ea5p c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt v\u1ec1 khung ph\u00e1p l\u00fd, c\u00f3 5 con s\u1ed1 nh\u1ea5t \u0111\u1ecbnh ph\u1ea3i l\u1ea5y t\u1eeb b\u1ea3n v\u1ebd.<\/p>\n<ol>\n<li><strong>Di\u1ec7n t\u00edch ph\u1ee7 keo<\/strong>(Di\u1ec7n t\u00edch thi c\u00f4ng)<\/li>\n<li><strong>Th\u1eddi gian ho\u1ea1t \u0111\u1ed9ng t\u1ed1i \u0111a<\/strong>(Ch\u1ed7 d\u00e0i nh\u1ea5t tr\u00ean b\u1ea3n v\u1ebd)<\/li>\n<li><strong>K\u00edch th\u01b0\u1edbc v\u00e0 kho\u1ea3ng c\u00e1ch c\u1ee7a khung ph\u00e1p l\u00fd<\/strong>(V\u00ed d\u1ee5: Khung ph\u00e1p l\u00fd 300, kho\u1ea3ng c\u00e1ch 2,0 m\u00e9t)<\/li>\n<li><strong>\u0110\u01b0\u1eddng k\u00ednh c\u1ed1t th\u00e9p s\u1eed d\u1ee5ng v\u00e0 chi\u1ec1u d\u00e0i m\u1ed1i n\u1ed1i ch\u1ed3ng<\/strong>(V\u00ed d\u1ee5: D13, ch\u1ed3ng 40d)<\/li>\n<li><strong>Chi\u1ec1u d\u00e0i c\u1ee7a m\u1ed9t thanh c\u1ed1t th\u00e9p \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng<\/strong>(V\u00ed d\u1ee5: 5 m\u00e9t)<\/li>\n<\/ol>\n<p>N\u1ebfu c\u00f3 \u0111\u1ee7 5 y\u1ebfu t\u1ed1 n\u00e0y, k\u1ebft qu\u1ea3 s\u1ebd t\u1ef1 \u0111\u1ed9ng hi\u1ec3n th\u1ecb.<\/p>\n<p>Ng\u01b0\u1ee3c l\u1ea1i, ch\u1ec9 c\u1ea7n c\u00f3 m\u1ed9t con s\u1ed1 n\u00e0o \u0111\u00f3 v\u1eabn c\u00f2n m\u01a1 h\u1ed3, th\u00ec t\u1ea5t c\u1ea3 c\u00e1c con s\u1ed1, k\u1ec3 c\u1ea3 s\u1ed1 bao xi m\u0103ng cu\u1ed1i c\u00f9ng, \u0111\u1ec1u s\u1ebd b\u1ecb sai l\u1ec7ch.<\/p>\n<p>V\u00ed d\u1ee5 t\u00ednh to\u00e1n l\u1ea7n n\u00e0y s\u1ebd \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng t\u1ea1i c\u00f4ng tr\u01b0\u1eddng sau \u0111\u00e2y.<\/p>\n<ul>\n<li>Di\u1ec7n t\u00edch d\u00e1n: 214 m\u00e9t vu\u00f4ng<\/li>\n<li>Chi\u1ec1u d\u00e0i t\u1ed1i \u0111a: 18 m\u00e9t<\/li>\n<li>Khung ph\u00e1p l\u00fd: 300 (chi\u1ec1u r\u1ed9ng khung 0,3 m\u00e9t \u00d7 chi\u1ec1u cao khung 0,3 m\u00e9t), kho\u1ea3ng c\u00e1ch 2,0 m\u00e9t<\/li>\n<li>C\u1ed1t th\u00e9p: D13, m\u1ed1i n\u1ed1i ch\u1ed3ng D13 \u00d7 40 = 520 milim\u00e9t<\/li>\n<li>Chi\u1ec1u d\u00e0i thanh th\u00e9p c\u1ed1t: 5 m\u00e9t<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-2534\" src=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2017\/02\/zumen.jpg\" alt=\"B\u1ea3n v\u1ebd tri\u1ec3n khai m\u1eb7t d\u1ed1c\" width=\"600\" height=\"400\" srcset=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2017\/02\/zumen.jpg 600w, https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2017\/02\/zumen-300x200.jpg 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/p>\n<p>Nh\u01b0 trong b\u1ea3n v\u1ebd \u1edf tr\u00ean, m\u1eb7t d\u1ed1c th\u1ef1c t\u1ebf c\u00f3 th\u1ec3 l\u00e0 h\u00ecnh tam gi\u00e1c ho\u1eb7c h\u00ecnh thang, v\u00e0 h\u1ea7u nh\u01b0 kh\u00f4ng bao gi\u1edd c\u00f3 h\u00ecnh vu\u00f4ng ho\u00e0n h\u1ea3o.<\/p>\n<p>Nh\u01b0ng t\u00f4i th\u00ec,<strong>Ch\u00fang t\u00f4i s\u1ebd t\u1ea1m th\u1eddi t\u00ednh to\u00e1n b\u1eb1ng c\u00e1ch coi c\u1ea3 nh\u1eefng ng\u1ecdn n\u00fai h\u00ecnh tam gi\u00e1c c\u0169ng l\u00e0 h\u00ecnh vu\u00f4ng.<\/strong><\/p>\n<p>Gi\u1ea3 s\u1eed b\u1ea3n v\u1ebd tri\u1ec3n khai \u1edf \u2b05 c\u00f3 di\u1ec7n t\u00edch l\u00e0 214m\u00b2, th\u00ec,<\/p>\n<p>214 m\u00e9t vu\u00f4ng \u00f7 18 m\u00e9t = 11,9 m\u00e9t<\/p>\n<p>V\u00ec v\u1eady, chi\u1ec1u d\u00e0i ngang s\u1ebd \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh l\u00e0 12 m\u00e9t.<\/p>\n<p>D\u00f9 h\u00ecnh d\u1ea1ng c\u00f3 kh\u00e1c so v\u1edbi th\u1ef1c t\u1ebf th\u00ec c\u0169ng kh\u00f4ng sao c\u1ea3.<\/p>\n<p>Cu\u1ed1i c\u00f9ng, ch\u00fang ta s\u1ebd b\u00f9 \u0111\u1eafp b\u1eb1ng t\u1ef7 l\u1ec7 t\u1ed5n th\u1ea5t.<\/p>\n<p>N\u1ebfu c\u1ed1 g\u1eafng l\u00e0m m\u1ed9t c\u00e1ch chi ti\u1ebft ngay t\u1eeb \u0111\u1ea7u th\u00ec s\u1ebd d\u1ec5 b\u1ecb \u0111\u00ecnh tr\u1ec7, n\u00ean vi\u1ec7c tr\u01b0\u1edbc ti\u00ean thay th\u1ebf b\u1eb1ng m\u1ed9t h\u00ecnh vu\u00f4ng s\u01a1 l\u01b0\u1ee3c \u0111\u1ec3 n\u1eafm b\u1eaft t\u1ed5ng th\u1ec3 s\u1ebd gi\u00fap ti\u1ebfn \u0111\u1ed9 c\u00f4ng vi\u1ec7c t\u1ea1i hi\u1ec7n tr\u01b0\u1eddng nhanh h\u01a1n r\u1ea5t nhi\u1ec1u.<\/p>\n<h3>S\u1ed1 l\u01b0\u1ee3ng th\u1ee3 l\u1eafp l\u01b0\u1edbi th\u00e9p | L\u01b0\u1edbi th\u00e9p v\u00e0 neo ch\u00ednh, neo ph\u1ee5<\/h3>\n<p>Tr\u01b0\u1edbc khi l\u1eafp khung, tr\u01b0\u1edbc ti\u00ean l\u00e0 c\u00f4ng \u0111o\u1ea1n l\u1eafp v\u00e1n l\u00f3t.<\/p>\n<p>C\u00f3 3 lo\u1ea1i s\u1ed1 l\u01b0\u1ee3ng ti\u00eau bi\u1ec3u th\u01b0\u1eddng xu\u1ea5t hi\u1ec7n trong b\u1ea3n thi\u1ebft k\u1ebf, \u0111\u00f3 l\u00e0:<\/p>\n<ul>\n<li>L\u01b0\u1edbi th\u00e9p Las (\u266f14\u00d750\u00d750): 140 m\u00e9t vu\u00f4ng tr\u00ean m\u1ed7i 100 m\u00e9t vu\u00f4ng<\/li>\n<li>C\u1ecdc neo ch\u00ednh (\u03c616 \u00d7 400 mm): 30 c\u1ecdc tr\u00ean m\u1ed7i 100 m\u00e9t vu\u00f4ng<\/li>\n<li>M\u00f3c neo ph\u1ee5 (\u03c69 \u00d7 200 mm): 150 c\u00e1i tr\u00ean m\u1ed7i 100 m\u00e9t vu\u00f4ng<\/li>\n<\/ul>\n<p>N\u1ebfu quy \u0111\u1ed5i ra tr\u00ean m\u1ed7i m\u00e9t vu\u00f4ng, c\u00e1c con s\u1ed1 t\u01b0\u01a1ng \u1ee9ng l\u00e0 1,4 m\u00e9t vu\u00f4ng, 0,3 c\u00e2y v\u00e0 1,5 c\u00e2y. Sau \u0111\u00f3 ch\u1ec9 c\u1ea7n nh\u00e2n v\u1edbi di\u1ec7n t\u00edch d\u00e1n l\u00e0 \u0111\u01b0\u1ee3c.<\/p>\n<p>Gi\u1ea3 s\u1eed \u0111\u00e2y l\u00e0 m\u1ed9t c\u00f4ng tr\u01b0\u1eddng c\u00f3 di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t d\u00e1n l\u00e0 600 m\u00e9t vu\u00f4ng.<\/p>\n<ul>\n<li>L\u01b0\u1edbi th\u00e9p Las: 600 m\u00e9t vu\u00f4ng \u00d7 1,4 \uff1d <strong>840 m\u00e9t vu\u00f4ng<\/strong><\/li>\n<li>C\u1ecdc neo ch\u00ednh: 600 m\u00e9t vu\u00f4ng \u00d7 0,3 = <strong>180 chai<\/strong><\/li>\n<li>M\u1ecf neo ph\u1ee5: 600 m\u00e9t vu\u00f4ng \u00d7 1,5 = <strong>900 chai<\/strong><\/li>\n<\/ul>\n<p>Con s\u1ed1 \u201c140 m\u00e9t vu\u00f4ng\/100 m\u00e9t vu\u00f4ng\u201d c\u1ee7a l\u01b0\u1edbi th\u00e9p Las, n\u00f3i t\u00f3m l\u1ea1i, l\u00e0 t\u0103ng th\u00eam 40% ph\u1ea3i kh\u00f4ng?<\/p>\n<p>Do con s\u1ed1 n\u00e0y \u0111\u00e3 t\u00ednh \u0111\u1ebfn ph\u1ea7n ch\u1ed3ng l\u1edbp v\u00e0 hao h\u1ee5t, n\u00ean v\u1ec1 c\u01a1 b\u1ea3n kh\u00f4ng c\u1ea7n ph\u1ea3i t\u00ednh th\u00eam chi ph\u00ed cho l\u01b0\u1edbi th\u00e9p nhi\u1ec1u h\u01a1n m\u1ee9c n\u00e0y.<\/p>\n<p>Tuy nhi\u00ean, tr\u00ean th\u1ef1c t\u1ebf, m\u1eb7t d\u1ed1c c\u00f3 nh\u1eefng ch\u1ed7 g\u1ed3 gh\u1ec1.<\/p>\n<p>T\u1ea1i c\u00e1c c\u00f4ng tr\u01b0\u1eddng c\u00f3 \u0111\u1ecba h\u00ecnh g\u1ed3 gh\u1ec1 ho\u1eb7c c\u00e1c c\u00f4ng tr\u01b0\u1eddng ph\u1ea3i c\u0103ng th\u00eam v\u1ea3i \u0111\u1ec3 x\u1eed l\u00fd n\u01b0\u1edbc ng\u1ea7m, t\u1ef7 l\u1ec7 hao h\u1ee5t s\u1ebd \u0111\u01b0\u1ee3c t\u00ednh th\u00eam d\u1ef1a tr\u00ean c\u01a1 s\u1edf n\u00e0y.<\/p>\n<p>N\u1ebfu t\u0103ng 20%, xin h\u00e3y nh\u00e2n v\u1edbi 1,2. \u0110\u00f3 l\u00e0<strong>S\u1ed1 l\u01b0\u1ee3ng \u0111\u1eb7t h\u00e0ng t\u1ea1i c\u00f4ng tr\u01b0\u1eddng<\/strong>s\u1ebd l\u00e0.<\/p>\n<p>V\u00e0 \u0111\u00e2y l\u00e0 \u0111i\u1ec3m m\u00e0 ng\u01b0\u1eddi ta th\u01b0\u1eddng hay qu\u00ean m\u1ed9t c\u00e1ch b\u1ea5t ng\u1edd,<strong>Ch\u1ed1t neo \u0111\u01b0\u1ee3c b\u00e1n theo h\u1ed9p<\/strong>\u0110\u00f3 l\u00e0.<\/p>\n<ul>\n<li>N\u1ebfu m\u1ed7i h\u1ed9p c\u00f3 30 chi\u1ebfc neo ch\u00ednh, th\u00ec 180 chi\u1ebfc \u00f7 30 chi\u1ebfc = <strong>6 h\u1ed9p<\/strong><\/li>\n<li>N\u1ebfu m\u1ed7i th\u00f9ng c\u00f3 200 chi\u1ebfc neo ph\u1ee5, th\u00ec 900 chi\u1ebfc \u00f7 200 chi\u1ebfc = 4,5 th\u00f9ng = <strong>5 h\u1ed9p<\/strong><\/li>\n<\/ul>\n<p>Khi kh\u00f4ng th\u1ec3 chia h\u1ebft, nh\u1ea5t \u0111\u1ecbnh ph\u1ea3i l\u00e0m tr\u00f2n l\u00ean.<\/p>\n<p>4.5 h\u1ed9p th\u00ec kh\u00f4ng th\u1ec3 \u0111\u1eb7t h\u00e0ng \u0111\u01b0\u1ee3c \u0111\u00e2u w<\/p>\n<p>C\u00f3 th\u1ec3 b\u1ea1n s\u1ebd ngh\u0129: \u201cSao kh\u00f4ng chia th\u00e0nh hai l\u1ea7n \u0111\u1ec3 v\u1eadn chuy\u1ec3n?\u201d, nh\u01b0ng n\u1ebfu \u0111\u1ecba \u0111i\u1ec3m giao h\u00e0ng qu\u00e1 nh\u1ecf th\u00ec chi ph\u00ed v\u1eadn chuy\u1ec3n s\u1ebd cao h\u01a1n.<\/p>\n<p>V\u1edbi nh\u1eefng th\u1ee9 nh\u01b0 l\u01b0\u1edbi th\u00e9p v\u00e0 ch\u1ed1t neo, t\u00f4i ngh\u0129 t\u1ed1t nh\u1ea5t l\u00e0 n\u00ean l\u1eafp \u0111\u1eb7t ch\u00fang ngay t\u1eeb l\u1ea7n \u0111\u1ea7u ti\u00ean.<\/p>\n<p>Ng\u01b0\u1ee3c l\u1ea1i, \u0111\u1ed1i v\u1edbi nh\u1eefng v\u1eadt li\u1ec7u n\u1eb7ng v\u00e0 c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng l\u1edbn nh\u01b0 c\u1ed1t th\u00e9p v\u00e0 xi m\u0103ng, nh\u01b0 s\u1ebd \u0111\u01b0\u1ee3c \u0111\u1ec1 c\u1eadp sau \u0111\u00e2y, vi\u1ec7c chia th\u00e0nh hai \u0111\u1ee3t s\u1ebd c\u00f3 l\u1ee3i h\u01a1n.<\/p>\n<p>Tuy nhi\u00ean, hi\u1ec7n nay gi\u00e1 v\u00e9 \u0111ang \u1edf m\u1ee9c cao ng\u1ea5t ng\u01b0\u1edfng...<\/p>\n<p>C\u1ee9 nh\u01b0 th\u1ec3 \u0111ang s\u1ed1ng trong th\u1eddi \u0111\u1ea1i m\u00e0 n\u1ebfu kh\u00f4ng nh\u1eadp h\u00e0ng \u0111\u01b0\u1ee3c ngay trong l\u1ea7n ti\u1ebfp theo th\u00ec ch\u1ec9 ri\u00eang ti\u1ec1n c\u01b0\u1edbc v\u1eadn chuy\u1ec3n th\u00f4i c\u0169ng \u0111\u00e3 l\u00e0 v\u1ea5n \u0111\u1ec1 l\u1edbn r\u1ed3i...<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-7718\" src=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2018\/07\/b12c677df23b6e858a8b83ede96b114f.jpg\" alt=\"Th\u1ee3 l\u1eafp t\u1ea5m l\u1ee3p \u2013 V\u1eadt li\u1ec7u \u0111\u00e3 v\u1ec1 kho\" width=\"600\" height=\"460\" srcset=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2018\/07\/b12c677df23b6e858a8b83ede96b114f.jpg 600w, https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2018\/07\/b12c677df23b6e858a8b83ede96b114f-300x230.jpg 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/p>\n<h3>L\u1eafp \u0111\u1eb7t c\u1ed1t th\u00e9p d\u1ecdc cho v\u00e1ch ch\u1eafn\uff5cX\u00e2y d\u1ef1ng v\u00e1ch ch\u1eafn d\u00e0i 18 m\u00e9t b\u1eb1ng c\u1ed1t th\u00e9p d\u00e0i 5 m\u00e9t<\/h3>\n<p>T\u1eeb \u0111\u00e2y l\u00e0 giai \u0111o\u1ea1n ch\u00ednh c\u1ee7a c\u00f4ng vi\u1ec7c l\u1eafp d\u1ef1ng khung c\u1ed1t th\u00e9p. Tr\u01b0\u1edbc ti\u00ean l\u00e0 c\u1ed1t th\u00e9p c\u1ee7a d\u1ea7m d\u1ecdc (theo chi\u1ec1u d\u00e0i c\u00f4ng tr\u00ecnh).<\/p>\n<p>C\u00f4ng tr\u00ecnh v\u1eeba r\u1ed3i c\u00f3 chi\u1ec1u d\u00e0i 18 m\u00e9t, l\u01b0\u1ee3ng c\u1ed1t th\u00e9p s\u1eed d\u1ee5ng l\u00e0 5 m\u00e9t, \u0111\u01b0\u1eddng k\u00ednh D13 v\u00e0 chi\u1ec1u d\u00e0i m\u1ed1i n\u1ed1i ch\u1ed3ng l\u00e0 520 milim\u00e9t, ph\u1ea3i kh\u00f4ng?<\/p>\n<p><strong>1. X\u00e1c \u0111\u1ecbnh s\u1ed1 l\u01b0\u1ee3ng thanh c\u1ed1t th\u00e9p v\u00e0 c\u00e1c v\u1ecb tr\u00ed n\u1ed1i<\/strong><\/p>\n<p>18 m\u00e9t \u00f7 5 m\u00e9t = 3 c\u00e2y v\u00e0 d\u01b0 3 m\u00e9t<\/p>\n<p>N\u00f3i c\u00e1ch kh\u00e1c, 5 m\u00e9t + 5 m\u00e9t + 5 m\u00e9t + 3 m\u00e9t = 18 m\u00e9t. V\u00ec s\u1ebd n\u1ed1i 4 \u0111o\u1ea1n l\u1ea1i v\u1edbi nhau, n\u00ean,<strong>C\u00f3 3 \u0111i\u1ec3m n\u1ed1i<\/strong>\u0110\u00f3 l\u00e0.<\/p>\n<p>Th\u1ec9nh tho\u1ea3ng c\u00f3 ng\u01b0\u1eddi nh\u1ea7m t\u01b0\u1edfng r\u1eb1ng \u201cv\u00ec c\u00f3 4 \u1ed1ng n\u00ean c\u0169ng c\u00f3 4 \u0111i\u1ec3m n\u1ed1i\u201d. S\u1ed1 \u0111i\u1ec3m n\u1ed1i b\u1eb1ng s\u1ed1 \u1ed1ng tr\u1eeb \u0111i 1.<\/p>\n<p>L\u00fac \u0111\u1ea7u t\u00f4i c\u0169ng \u0111\u00e3 l\u00e0m h\u1ecfng r\u1ed3i (c\u01b0\u1eddi)<\/p>\n<p><strong>2. C\u1ed9ng th\u00eam ph\u1ea7n ch\u1ed3ng ch\u00e9o c\u1ee7a m\u1ed1i n\u1ed1i<\/strong><\/p>\n<p>0,52 m\u00e9t \u00d7 3 v\u1ecb tr\u00ed \uff1d 1,56 m\u00e9t<\/p>\n<p><strong>3. Chi\u1ec1u d\u00e0i c\u1ea7n thi\u1ebft cho m\u1ed9t s\u1ee3i c\u1ed1t th\u00e9p (1 s\u1ee3i)<\/strong><\/p>\n<p>5 m\u00e9t \u00d7 3 thanh + 3 m\u00e9t + 1,56 m\u00e9t = <strong>19,56 m\u00e9t<\/strong><\/p>\n<p><strong>4. V\u00ec khung 300 s\u1eed d\u1ee5ng 4 thanh c\u1ed1t th\u00e9p \u1edf tr\u00ean v\u00e0 d\u01b0\u1edbi n\u00ean<\/strong><\/p>\n<p>19,56 m\u00e9t \u00d7 4 c\u00e2y \uff1d <strong>78,24 m\u00e9t \/ m\u1ed7i d\u1ea7m<\/strong><\/p>\n<p><strong>5. T\u00ednh s\u1ed1 l\u01b0\u1ee3ng d\u1ea7m (s\u1ed1 \u0111i\u1ec3m giao nhau)<\/strong><\/p>\n<p>Chi\u1ec1u d\u00e0i ngang \u00f7 Kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c khung = Nh\u1ecbp 12 m\u00e9t \u00f7 2 m\u00e9t = 6 nh\u1ecbp<\/p>\n<p><strong>6 nh\u1ecbp + 1 = 7 d\u1ea7m<\/strong><\/p>\n<p>B\u00ed quy\u1ebft n\u1eb1m \u1edf vi\u1ec7c c\u1ed9ng th\u00eam 1 v\u00e0o kho\u1ea3ng c\u00e1ch.<\/p>\n<p>C\u0169ng gi\u1ed1ng nh\u01b0 c\u00e1c c\u1ecdc r\u00e0o, s\u1ed1 c\u1ed9t tr\u1ee5 nhi\u1ec1u h\u01a1n s\u1ed1 kho\u1ea3ng tr\u1ed1ng m\u1ed9t c\u00e1i, ph\u1ea3i kh\u00f4ng?<\/p>\n<p>N\u1ebfu qu\u00ean con s\u1ed1 \u201c+1\u201d n\u00e0y, s\u1ebd thi\u1ebfu h\u1eb3n m\u1ed9t d\u1ea7m th\u00e9p.<\/p>\n<p><strong>6. T\u1ed5ng l\u01b0\u1ee3ng c\u1ed1t th\u00e9p d\u1ecdc<\/strong><\/p>\n<p>7 d\u1ea7m \u00d7 78,24 m\u00e9t = <strong>547,68 m\u00e9t<\/strong><\/p>\n<p>547,68 m\u00e9t \u00d7 0,995 kil\u00f4gam\/m\u00e9t = <strong>Kho\u1ea3ng 545 kil\u00f4gam<\/strong><\/p>\n<p>M\u1eadt \u0111\u1ed9 D13 l\u00e0 0,995 kg\/m l\u00e0 gi\u00e1 tr\u1ecb danh ngh\u0129a \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh trong ti\u00eau chu\u1ea9n JIS G 3112 (Th\u00e9p thanh d\u00f9ng cho b\u00ea t\u00f4ng c\u1ed1t th\u00e9p).<\/p>\n<p>\u0110\u00e2y l\u00e0 con s\u1ed1 c\u00f3 th\u1ec3 kh\u1eb3ng \u0111\u1ecbnh ch\u1eafc ch\u1eafn.<\/p>\n<p>Nh\u00e2n ti\u1ec7n, \u0111\u01b0\u1eddng k\u00ednh danh ngh\u0129a c\u1ee7a D13 l\u00e0 12,7 milim\u00e9t, di\u1ec7n t\u00edch m\u1eb7t c\u1eaft danh ngh\u0129a l\u00e0 126,7 milim\u00e9t vu\u00f4ng.<\/p>\n<p>L\u01b0u \u00fd r\u1eb1ng chi\u1ec1u d\u00e0i m\u1ed1i n\u1ed1i ch\u1ed3ng \u201c40d\u201d l\u00e0 th\u00f4ng s\u1ed1 \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp trong v\u00ed d\u1ee5 n\u00e0y.<\/p>\n<p>Tr\u00ean th\u1ef1c t\u1ebf, trong h\u1ed3 s\u01a1 thi\u1ebft k\u1ebf v\u00e0 b\u1ea3n m\u00f4 t\u1ea3 k\u1ef9 thu\u1eadt, t\u1ef7 l\u1ec7 c\u00f3 th\u1ec3 l\u00e0 30d ho\u1eb7c 35d, v\u00ec v\u1eady xin vui l\u00f2ng ki\u1ec3m tra k\u1ef9.<\/p>\n<p>N\u1ebfu thay \u0111\u1ed5i \u0111i\u1ec3m n\u00e0y, l\u01b0\u1ee3ng c\u1ed1t th\u00e9p s\u1ebd thay \u0111\u1ed5i \u1edf m\u1ee9c v\u1eeba ph\u1ea3i.<\/p>\n<h3>L\u1eafp \u0111\u1eb7t c\u1ed1t th\u00e9p d\u1ea7m ngang trong khung ph\u00e1p l\u00fd | C\u00e1ch ti\u1ebfp c\u1eadn ho\u00e0n to\u00e0n gi\u1ed1ng v\u1edbi d\u1ea7m d\u1ecdc<\/h3>\n<p>\u0110\u00e2y l\u00e0 d\u1ea7m ngang (theo h\u01b0\u1edbng ngang). Th\u00e0nh th\u1eadt m\u00e0 n\u00f3i, c\u00e1ch l\u00e0m c\u0169ng gi\u1ed1ng nh\u01b0 d\u1ea7m d\u1ecdc v\u1eady (c\u01b0\u1eddi). Ch\u1ec9 c\u1ea7n ho\u00e1n \u0111\u1ed5i c\u00e1c con s\u1ed1 c\u1ee7a d\u1ea7m d\u1ecdc v\u00e0 d\u1ea7m ngang l\u00e0 \u0111\u01b0\u1ee3c.<\/p>\n<p>Chi\u1ec1u d\u00e0i ngang l\u00e0 12 m\u00e9t ph\u1ea3i kh\u00f4ng nh\u1ec9.<\/p>\n<p>12 m\u00e9t \u00f7 5 m\u00e9t = 2 \u0111o\u1ea1n v\u00e0 d\u01b0 2 m\u00e9t \u2192 5 m\u00e9t + 5 m\u00e9t + 2 m\u00e9t = 12 m\u00e9t,<strong>C\u00f3 2 \u0111i\u1ec3m n\u1ed1i<\/strong><\/p>\n<p>0,52 m\u00e9t \u00d7 2 v\u1ecb tr\u00ed \uff1d 1,04 m\u00e9t<\/p>\n<p>2 thanh d\u00e0i 5 m\u00e9t + 2 m\u00e9t + 1,04 m\u00e9t = <strong>13,04 m\u00e9t<\/strong><\/p>\n<p>13,04 m\u00e9t \u00d7 4 c\u00e2y \uff1d <strong>52,16 m\u00e9t \/ m\u1ed7i d\u1ea7m<\/strong><\/p>\n<p>Chi\u1ec1u d\u00e0i d\u1ea7m \u00f7 Kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c khung d\u1ea7m = S\u1ed1 nh\u1ecbp 18 m\u00e9t \u00f7 2 m\u00e9t = 9 nh\u1ecbp <strong>9 nh\u1ecbp + 1 = 10 d\u1ea7m<\/strong><\/p>\n<p>10 d\u1ea7m \u00d7 52,16 m\u00e9t \uff1d <strong>521,6 m\u00e9t<\/strong><\/p>\n<p>521,6 m\u00e9t \u00d7 0,995 kil\u00f4gam\/m\u00e9t = <strong>Kho\u1ea3ng 519 kil\u00f4gam<\/strong><\/p>\n<p><strong>Khi k\u1ebft h\u1ee3p d\u1ea7m d\u1ecdc v\u00e0 d\u1ea7m ngang l\u1ea1i v\u1edbi nhau th\u00ec<\/strong><\/p>\n<p>545 kil\u00f4gam + 519 kil\u00f4gam = <strong>Kho\u1ea3ng 1.064 kil\u00f4gam<\/strong><\/p>\n<p>N\u1ebfu t\u00ednh theo chi\u1ec1u d\u00e0i, th\u00ec 547,68 m\u00e9t + 521,6 m\u00e9t = <strong>1.069,28 m\u00e9t<\/strong><\/p>\n<p>N\u1ebfu quy \u0111\u1ed5i sang s\u1ed1 m\u00e9t, v\u1edbi \u0111\u01a1n v\u1ecb ti\u00eau chu\u1ea9n l\u00e0 5 m\u00e9t, 1.069,28 m\u00e9t \u00f7 5 m\u00e9t = 213,9 \u2192 <strong>214 cu\u1ed1n<\/strong><\/p>\n<p>\u203bTrong b\u00e0i vi\u1ebft tr\u01b0\u1edbc (Ph\u1ea7n 3), t\u00f4i \u0111\u00e3 vi\u1ebft r\u1eb1ng \u201c1.064 kil\u00f4gam \u00f7 5 m\u00e9t = 213 thanh\u201d, nh\u01b0ng \u0111\u00e2y l\u00e0 sai s\u00f3t do \u0111\u00e3 chia tr\u1ecdng l\u01b0\u1ee3ng cho chi\u1ec1u d\u00e0i. C\u00e1ch t\u00ednh \u0111\u00fang l\u00e0 chia t\u1ed5ng chi\u1ec1u d\u00e0i cho chi\u1ec1u d\u00e0i ti\u00eau chu\u1ea9n. L\u1ea7n n\u00e0y t\u00f4i \u0111\u00e3 t\u00ednh l\u1ea1i v\u00e0 s\u1eeda l\u1ea1i. Xin l\u1ed7i nh\u00e9 w<\/p>\n<p>N\u1ebfu l\u00e0 ng\u01b0\u1eddi c\u00f3 kinh nghi\u1ec7m, t\u00f4i ngh\u0129 r\u1eb1ng c\u00f3 th\u1ec3 nh\u00e2n t\u1ef7 l\u1ec7 t\u1ed5n th\u1ea5t ph\u00f9 h\u1ee3p v\u1edbi t\u00ecnh h\u00ecnh th\u1ef1c t\u1ebf t\u1ea1i c\u00f4ng tr\u01b0\u1eddng v\u00e0o s\u1ed1 l\u01b0\u1ee3ng v\u1eadn chuy\u1ec3n m\u00e0 kh\u00f4ng g\u1eb7p v\u1ea5n \u0111\u1ec1 g\u00ec.<\/p>\n<p>Tuy nhi\u00ean, t\u00f4i th\u00ec,<strong>V\u1ec1 ph\u1ea7n c\u1ed1t th\u00e9p khung, tr\u01b0\u1edbc m\u1eaft ch\u00fang t\u00f4i s\u1ebd \u0111\u1eb7t h\u00e0ng \u0111\u1ee3t \u0111\u1ea7u ti\u00ean v\u1edbi s\u1ed1 l\u01b0\u1ee3ng n\u00e0y.<\/strong><\/p>\n<p>L\u00fd do r\u1ea5t \u0111\u01a1n gi\u1ea3n, \u0111\u00f3 l\u00e0 do trong khu\u00f4n kh\u1ed5 ph\u00e1p l\u00fd, vi\u1ec7c \u0111\u00e1nh gi\u00e1 sai nh\u1eefng bi\u1ebfn \u0111\u1ed9ng c\u00f3 th\u1ec3 d\u1ec5 d\u1eabn \u0111\u1ebfn t\u1ed5n th\u1ea5t. Chia th\u00e0nh hai l\u1ea7n s\u1ebd gi\u00fap chi ph\u00ed cu\u1ed1i c\u00f9ng r\u1ebb h\u01a1n.<\/p>\n<p>Nh\u01b0 t\u00f4i \u0111\u00e3 vi\u1ebft trong b\u00e0i tr\u01b0\u1edbc, t\u00ednh \u0111\u1ebfn th\u00e1ng 8 n\u0103m 2.026, con s\u1ed1 n\u00e0y l\u00e0 1 l\u1ea7n!<\/p>\n<p>Gi\u00e1 c\u01b0\u1edbc v\u1eadn chuy\u1ec3n nguy\u00ean li\u1ec7u \u0111\u00e3 t\u0103ng qu\u00e1 cao n\u00ean kh\u00f4ng th\u1ec3 gi\u1ea3i quy\u1ebft \u0111\u01b0\u1ee3c n\u1eefa.<\/p>\n<p>H\u00e3y d\u1ef1 tr\u00f9 m\u1ee9c t\u1ed5n th\u1ea5t cao h\u01a1n m\u1ed9t ch\u00fat.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-2515\" src=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2017\/02\/c19ab7218d9c72e07c5287dfda352c7c.jpg\" alt=\"T\u00ednh to\u00e1n v\u1eadt li\u1ec7u\" width=\"600\" height=\"460\" \/><\/p>\n<h3>T\u00ednh s\u1ed1 l\u01b0\u1ee3ng v\u00e1n khu\u00f4n (v\u00e1n) | M\u1ed1i quan h\u1ec7 gi\u1eefa nh\u1ecbp v\u00e0 s\u1ed1 \u0111i\u1ec3m giao nhau<\/h3>\n<p>Ti\u1ebfp theo l\u00e0 s\u1ed1 l\u01b0\u1ee3ng v\u00e1n khu\u00f4n, hay c\u00f2n g\u1ecdi l\u00e0 s\u1ed1 t\u1ea5m v\u00e1n khu\u00f4n.<\/p>\n<p>V\u1eeba n\u00e3y, ch\u00fang ta \u0111\u00e3 c\u00f3 c\u00e1c con s\u1ed1 9 (chi\u1ec1u d\u1ecdc) v\u00e0 6 (chi\u1ec1u ngang). Ch\u00fang ta s\u1ebd s\u1eed d\u1ee5ng nguy\u00ean c\u00e1c con s\u1ed1 n\u00e0y.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-2576\" src=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2017\/02\/5b1533430d70a5408c068bfaee5c3cf3.jpg\" alt=\"B\u1ea3n v\u1ebd ph\u00e2n b\u1ed5 th\u1ec3 hi\u1ec7n m\u1ed1i quan h\u1ec7 gi\u1eefa nh\u1ecbp v\u00e0 s\u1ed1 \u0111i\u1ec3m giao nhau c\u1ee7a k\u1ebft c\u1ea5u khung th\u00e9p\" width=\"600\" height=\"400\" srcset=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2017\/02\/5b1533430d70a5408c068bfaee5c3cf3.jpg 600w, https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2017\/02\/5b1533430d70a5408c068bfaee5c3cf3-300x200.jpg 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/p>\n<p>C\u00e1ch b\u1ed1 tr\u00ed ch\u1eafc h\u1eb3n s\u1ebd gi\u1ed1ng nh\u01b0 trong h\u00ecnh tr\u00ean. (\u0110\u1eebng \u0111\u1ec3 \u00fd \u0111\u1ebfn chi\u1ec1u d\u1ecdc hay chi\u1ec1u ngang nh\u00e9 w)<\/p>\n<ul>\n<li>Khung d\u1ecdc: (Kho\u1ea3ng c\u00e1ch ngang + 1) \u00d7 Kho\u1ea3ng c\u00e1ch d\u1ecdc = (6 + 1) \u00d7 9 = <strong>63 t\u1ea5m<\/strong><\/li>\n<li>Khung ngang: (Kho\u1ea3ng c\u00e1ch d\u1ecdc + 1) \u00d7 Kho\u1ea3ng c\u00e1ch ngang = (9 + 1) \u00d7 6 = <strong>60 t\u1edd<\/strong><\/li>\n<li>T\u1ed5ng c\u1ed9ng \uff1d <strong>123 t\u1ea5m<\/strong>(\u1ede \u0111\u00e2y ch\u00fang ta kh\u00f4ng t\u00ednh \u0111\u1ebfn t\u1ed5n th\u1ea5t)<\/li>\n<\/ul>\n<p>V\u00e0 \u0111\u00e2y l\u00e0 hai m\u1ed1i quan h\u1ec7 quan tr\u1ecdng m\u00e0 ch\u00fang ta s\u1ebd ti\u1ebfp t\u1ee5c duy tr\u00ec trong t\u01b0\u01a1ng lai.<\/p>\n<ul>\n<li>(Chi\u1ec1u ngang + 1) = <strong>S\u1ed1 \u0111i\u1ec3m giao nhau ngang<\/strong>(L\u1ea7n n\u00e0y l\u00e0 s\u1ed1 7)<\/li>\n<li>(Kho\u1ea3ng c\u00e1ch d\u1ecdc + 1) = <strong>S\u1ed1 \u0111i\u1ec3m giao nhau theo chi\u1ec1u d\u1ecdc<\/strong>(L\u1ea7n n\u00e0y l\u00e0 10)<\/li>\n<\/ul>\n<p>\u201cS\u1ed1 \u0111i\u1ec3m giao nhau\u201d n\u00e0y l\u00e0 th\u00f4ng s\u1ed1 c\u1ea7n thi\u1ebft cho vi\u1ec7c t\u00ednh to\u00e1n c\u00e1c \u0111i\u1ec3m neo v\u00e0 \u1ed1ng tho\u00e1t n\u01b0\u1edbc trong c\u00e1c b\u01b0\u1edbc ti\u1ebfp theo.<\/p>\n<p>Vi\u1ec7c t\u00ednh to\u00e1n s\u1ed1 l\u01b0\u1ee3ng trong khu\u00f4n kh\u1ed5 ph\u00e1p l\u00fd, x\u00e9t cho c\u00f9ng, ch\u00ednh l\u00e0 \u0111i\u1ec1u n\u00e0y<strong>S\u1ea3n ph\u1ea9m c\u1ee7a \u0111\u1ed9 d\u00e0i \u0111o\u1ea1n th\u1eb3ng v\u00e0 s\u1ed1 \u0111i\u1ec3m giao nhau<\/strong>V\u1eady l\u00e0 m\u1ecdi chuy\u1ec7n s\u1ebd \u0111\u01b0\u1ee3c gi\u1ea3i quy\u1ebft h\u1ebft r\u1ed3i.<\/p>\n<h3>M\u1ecf neo ch\u00ednh, m\u1ecf neo ph\u1ee5, \u1ed1ng tho\u00e1t n\u01b0\u1edbc | T\u00ednh \u0111\u01b0\u1ee3c t\u1ea5t c\u1ea3 d\u1ef1a tr\u00ean s\u1ed1 \u0111i\u1ec3m giao nhau<\/h3>\n<p>S\u1eed d\u1ee5ng s\u1ed1 \u0111i\u1ec3m giao nhau v\u1eeba n\u00eau \u0111\u1ec3 t\u00ednh ra k\u1ebft qu\u1ea3 m\u1ed9t l\u1ea7n.<\/p>\n<p><strong>M\u00f3c neo ph\u1ee5<\/strong><\/p>\n<p>Chi\u1ec1u r\u1ed9ng ngang \u00d7 S\u1ed1 l\u01b0\u1ee3ng neo ph\u1ee5 \u00d7 S\u1ed1 \u0111i\u1ec3m giao nhau d\u1ecdc \uff1d S\u1ed1 l\u01b0\u1ee3ng neo ph\u1ee5<\/p>\n<p>N\u1ebfu khung ph\u00e1p l\u00fd l\u00e0 300 th\u00ec m\u1ed7i nh\u1ecbp c\u00f3 3 thanh, do \u0111\u00f3: 6 nh\u1ecbp \u00d7 3 thanh \u00d7 10 \u0111i\u1ec3m giao nhau \uff1d <strong>180 chai<\/strong><\/p>\n<p><strong>\u1ed0ng tho\u00e1t n\u01b0\u1edbc<\/strong><\/p>\n<p>Chi\u1ec1u ngang \u00d7 S\u1ed1 \u0111i\u1ec3m giao nhau theo chi\u1ec1u d\u1ecdc = S\u1ed1 v\u1ecb tr\u00ed tho\u00e1t n\u01b0\u1edbc 6 nh\u1ecbp \u00d7 10 \u0111i\u1ec3m giao nhau = <strong>60 \u0111\u1ecba \u0111i\u1ec3m<\/strong><\/p>\n<p>V\u1edbi khung ph\u00e1p l\u00fd 300, n\u1ebfu chi\u1ec1u d\u00e0i m\u1ed7i \u0111o\u1ea1n \u1ed1ng PVC l\u00e0 0,35 m\u00e9t, th\u00ec 0,35 m\u00e9t \u00d7 60 \u0111o\u1ea1n \uff1d 21 m\u00e9t; 21 m\u00e9t \u00f7 4 m\u00e9t (m\u1ed7i \u1ed1ng PVC) \uff1d 5,25 \u1ed1ng \uff1d <strong>6 chai<\/strong><\/p>\n<p><strong>Ng\u01b0\u1eddi d\u1eabn ch\u01b0\u01a1ng tr\u00ecnh ch\u00ednh<\/strong><\/p>\n<p>S\u1ed1 \u0111i\u1ec3m giao d\u1ecdc \u00d7 S\u1ed1 \u0111i\u1ec3m giao ngang = S\u1ed1 c\u1ecdc neo ch\u00ednh 10 \u0111i\u1ec3m giao \u00d7 7 \u0111i\u1ec3m giao = <strong>70 chai<\/strong><\/p>\n<p>\u0110\u00e2y l\u00e0 t\u1ef7 l\u1ec7 t\u1ed5n th\u1ea5t \u01b0\u1edbc t\u00ednh, nh\u01b0ng theo c\u1ea3m nh\u1eadn c\u1ee7a t\u00f4i th\u00ec<strong>S\u1ed1 l\u01b0\u1ee3ng ch\u1ed1t neo ph\u1ee5 chi\u1ebfm ch\u01b0a \u0111\u1ebfn 20%, c\u00f2n ch\u1ed1t neo ch\u00ednh kho\u1ea3ng b\u1eb1ng s\u1ed1 \u0111i\u1ec3m giao nhau c\u1ed9ng th\u00eam 20 c\u00e1i<\/strong>Ch\u1ec9 c\u1ea7n xem qua l\u00e0 \u0111\u1ee7 r\u1ed3i.<\/p>\n<p>Tuy nhi\u00ean, c\u0169ng gi\u1ed1ng nh\u01b0 c\u1ed1t th\u00e9p khung ph\u00e1p l\u00fd, ch\u1ec9 c\u1ea7n theo d\u00f5i ti\u1ebfn \u0111\u1ed9 th\u00ec vi\u1ec7c nh\u1eadn l\u00f4 h\u00e0ng th\u1ee9 hai c\u0169ng kh\u00f4ng c\u00f3 v\u1ea5n \u0111\u1ec1 g\u00ec. (V\u00ec c\u00f3 th\u1ec3 g\u1eedi neo b\u1eb1ng d\u1ecbch v\u1ee5 chuy\u1ec3n ph\u00e1t nhanh!)<\/p>\n<p>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 gi\u1ea3m thi\u1ec3u l\u00e3ng ph\u00ed nguy\u00ean li\u1ec7u?<\/p>\n<p>\u0110\u00e2y ch\u00ednh l\u00e0 c\u00f4ng vi\u1ec7c c\u1ee7a ng\u01b0\u1eddi qu\u1ea3n l\u00fd thi c\u00f4ng; tuy c\u00f3 v\u1ebb \u0111\u01a1n gi\u1ea3n nh\u01b0ng l\u1ea1i r\u1ea5t hi\u1ec7u qu\u1ea3 trong vi\u1ec7c tu\u00e2n th\u1ee7 ch\u1eb7t ch\u1ebd ng\u00e2n s\u00e1ch.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-59855\" src=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2026\/04\/38644e524e5dae9d7e76abb69f5b6298.jpg\" alt=\"Th\u1ee3 phun v\u1eefa\" width=\"600\" height=\"450\" \/><\/p>\n<h3>S\u1ed1 l\u01b0\u1ee3ng v\u1eefa v\u00e0 c\u00e1t | T\u1eeb chi\u1ec1u d\u00e0i khung ph\u00e1p l\u00fd \u0111\u1ebfn s\u1ed1 bao xi m\u0103ng \u2013 t\u1ea5t c\u1ea3 \u0111\u1ec1u theo m\u1ed9t \u0111\u01b0\u1eddng th\u1eb3ng<\/h3>\n<p>Cu\u1ed1i c\u00f9ng c\u0169ng \u0111\u00e3 ho\u00e0n th\u00e0nh ph\u1ea7n v\u00e1n khu\u00f4n v\u00e0 c\u00e1c v\u1eadt li\u1ec7u kh\u00e1c, gi\u1edd \u0111\u1ebfn ph\u1ea7n v\u1eefa.<\/p>\n<p>\u1ede \u0111\u00e2y ch\u1ec9 c\u00f3 3 b\u01b0\u1edbc: \u201cT\u00ednh t\u1ed5ng chi\u1ec1u d\u00e0i khung\u201d \u2192 \u201cChuy\u1ec3n th\u00e0nh th\u1ec3 t\u00edch\u201d \u2192 \u201cNh\u00e2n v\u1edbi t\u1ef7 l\u1ec7 pha tr\u1ed9n\u201d.<\/p>\n<p>Tr\u01b0\u1edbc h\u1ebft l\u00e0 v\u1ec1 t\u1ef7 l\u1ec7 tr\u1ed9n: t\u1ef7 l\u1ec7 1:4 c\u1ee7a v\u1eefa th\u01b0\u1eddng \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh trong c\u00e1c b\u1ea3n thi\u1ebft k\u1ebf c\u1ee7a h\u1ea7u h\u1ebft c\u00e1c qu\u1ed1c gia, t\u1ec9nh, th\u00e0nh ph\u1ed1 v\u00e0 th\u1ecb tr\u1ea5n<\/p>\n<p>Xi m\u0103ng : C\u00e1t = 420 kg : 1.680 kg (tr\u00ean m\u1ed7i m\u00e9t kh\u1ed1i)<\/p>\n<p>T\u00f4i ngh\u0129 l\u00e0 nh\u01b0 v\u1eady. \u0110i\u1ec3m m\u1ea5u ch\u1ed1t l\u00e0 ch\u00fang ta \u0111\u00e3 bi\u1ebft l\u01b0\u1ee3ng xi m\u0103ng tr\u00ean m\u1ed7i m\u00e9t kh\u1ed1i l\u00e0 420 kil\u00f4gam.<\/p>\n<p><strong>1. \u0110\u1ec1 xu\u1ea5t gia h\u1ea1n th\u1eddi h\u1ea1n thi c\u00f4ng theo khung ph\u00e1p l\u00fd<\/strong><\/p>\n<p>V\u00ec kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c khung l\u00e0 2,0 m\u00e9t v\u00e0 chi\u1ec1u r\u1ed9ng m\u1ed7i khung l\u00e0 0,3 m\u00e9t, n\u00ean chi\u1ec1u d\u00e0i c\u1ee7a m\u1ed9t khung l\u00e0 2,0 \u2212 0,3 = 1,7 m\u00e9t.<\/p>\n<ul>\n<li>Khung d\u1ecdc: 63 t\u1ea5m \u00d7 1,7 m\u00e9t = 107,1 m\u00e9t<\/li>\n<li>Khung ngang: 60 t\u1ea5m \u00d7 1,7 m\u00e9t = 102,0 m\u00e9t<\/li>\n<li>\u0110i\u1ec3m giao nhau: 7 \u0111i\u1ec3m theo chi\u1ec1u ngang \u00d7 10 h\u00e0ng theo chi\u1ec1u d\u1ecdc = 70 \u0111i\u1ec3m \u00d7 0,3 m\u00e9t = 21,0 m\u00e9t<\/li>\n<\/ul>\n<p>T\u1ed5ng c\u1ed9ng = 107,1 + 102,0 + 21,0 = <strong>230,1 m\u00e9t<\/strong><\/p>\n<p>Cu\u1ed1i c\u00f9ng, t\u00f4i \u0111\u00e3 th\u00eam ph\u1ea7n giao \u0111i\u1ec3m v\u00e0o, nh\u01b0ng vi\u1ec7c n\u00e0y c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n theo c\u00e1ch n\u00e0o c\u0169ng \u0111\u01b0\u1ee3c.<\/p>\n<p>B\u1edfi v\u00ec \u0111\u01a1n \u0111\u1eb7t h\u00e0ng xi m\u0103ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh ngay trong qu\u00e1 tr\u00ecnh thi c\u00f4ng.<\/p>\n<p>N\u1ebfu l\u00e0 xe ch\u1edf b\u00ea t\u00f4ng t\u01b0\u01a1i, xin h\u00e3y c\u1ea9n th\u1eadn m\u1ed9t ch\u00fat.<\/p>\n<p>G\u1ea7n \u0111\u00e2y, gi\u00e1 b\u00ea t\u00f4ng tr\u1ed9n s\u1eb5n c\u0169ng qu\u00e1 cao n\u00ean ch\u00fang ta \u0111\u1ec1u mu\u1ed1n gi\u1ea3m thi\u1ec3u t\u1ed1i \u0111a l\u01b0\u1ee3ng v\u1eadt li\u1ec7u b\u1ecb l\u00e3ng ph\u00ed, ph\u1ea3i kh\u00f4ng n\u00e0o!!<\/p>\n<p><strong>2. Chuy\u1ec3n sang th\u1ec3 t\u00edch<\/strong><\/p>\n<p>Chi\u1ec1u d\u00e0i khung \u00d7 Chi\u1ec1u r\u1ed9ng khung \u00d7 Chi\u1ec1u cao khung = Th\u1ec3 t\u00edch v\u1eefa<\/p>\n<p>230,1 m\u00e9t \u00d7 0,3 m\u00e9t \u00d7 0,3 m\u00e9t \uff1d <strong>20,71 m\u00e9t kh\u1ed1i<\/strong><\/p>\n<p><strong>3. S\u1ed1 bao xi m\u0103ng<\/strong><\/p>\n<p>20,71 m\u00e9t kh\u1ed1i \u00d7 420 kil\u00f4gam = 8.698 kil\u00f4gam 8.698 kil\u00f4gam \u00f7 25 kil\u00f4gam\/bao = 347,9 = <strong>348 t\u00fai<\/strong><\/p>\n<p>\u0110\u1ed1i v\u1edbi xe b\u00ea t\u00f4ng tr\u1ed9n s\u1eb5n, c\u00f3 th\u1ec3 t\u00ednh \u0111\u1ebfn l\u01b0\u1ee3ng hao h\u1ee5t trong 20,71 m\u00b3 \u0111\u1ea7u ti\u00ean ho\u1eb7c \u0111i\u1ec1u ch\u1ec9nh t\u1ea1i c\u00f4ng tr\u01b0\u1eddng c\u0169ng \u0111\u01b0\u1ee3c<\/p>\n<p><strong>4. C\u00e1t<\/strong><\/p>\n<p>C\u00e1t th\u00ec \u0111\u01a1n gi\u1ea3n. V\u00ec m\u1ed7i m\u00e9t kh\u1ed1i n\u1eb7ng 1.680 kil\u00f4gam, n\u00ean,<\/p>\n<p>20,71 m\u00e9t kh\u1ed1i \u00d7 1.680 kil\u00f4gam = 34.791 kil\u00f4gam = <strong>Kho\u1ea3ng 34,8 t\u1ea5n<\/strong><\/p>\n<p>Tr\u00ean th\u1ef1c t\u1ebf, ch\u1ec9 c\u1ea7n t\u00ednh th\u00eam kho\u1ea3ng 20% l\u00e0 s\u1ebd kh\u00f4ng c\u00f3 v\u1ea5n \u0111\u1ec1 g\u00ec.<\/p>\n<p>B\u1edfi v\u00ec kh\u00f4ng th\u1ec3 \u0111\u1ed5 h\u1ebft c\u00e1t v\u00e0o c\u00f9ng m\u1ed9t l\u00fac \u0111\u01b0\u1ee3c.<\/p>\n<p>Ngay c\u1ea3 v\u1edbi xe ben c\u1ee1 l\u1edbn, x\u00e9t v\u1ec1 di\u1ec7n t\u00edch b\u00e3i \u0111\u1ed7, th\u1ef1c t\u1ebf th\u00ec m\u1ed7i ng\u00e0y ch\u1ec9 c\u00f3 th\u1ec3 ti\u1ebfp nh\u1eadn t\u1ed1i \u0111a kho\u1ea3ng 4 chi\u1ebfc.<\/p>\n<p>Ch\u1ec9 c\u1ea7n n\u1eafm \u0111\u01b0\u1ee3c \u00fd ch\u00ednh, sau \u0111\u00f3 \u0111i\u1ec1u ch\u1ec9nh l\u1ea1i \u1edf b\u01b0\u1edbc cu\u1ed1i c\u00f9ng l\u00e0 \u0111\u01b0\u1ee3c, n\u00ean kh\u00f4ng c\u1ea7n ph\u1ea3i qu\u00e1 lo l\u1eafng v\u1ec1 ph\u1ea7n n\u00e0y.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-2790\" src=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2017\/03\/c6064f4b9beea413d1c7fdc331b39415.jpg\" alt=\"G\u00f3c ngh\u1ec9\" width=\"600\" height=\"460\" srcset=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2017\/03\/c6064f4b9beea413d1c7fdc331b39415.jpg 600w, https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2017\/03\/c6064f4b9beea413d1c7fdc331b39415-300x230.jpg 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/p>\n<p>N\u00f3i th\u00eam m\u1ed9t ch\u00fat, g\u00f3c nghi\u00eang c\u1ee7a s\u01b0\u1eddn \u0111\u1ed3i c\u00e1t trong b\u1ee9c \u1ea3nh tr\u00ean. \u0110i\u1ec1u n\u00e0y...<strong>G\u00f3c ngh\u1ec9<\/strong>Ng\u01b0\u1eddi ta n\u00f3i r\u1eb1ng...<\/p>\n<p>\u0110\u00f3 l\u00e0 g\u00f3c nghi\u00eang c\u1ee7a m\u1eb7t d\u1ed1c m\u00e0 khi ch\u1ea5t c\u00e1c ch\u1ea5t b\u1ed9t v\u00e0 h\u1ea1t l\u00ean m\u1ed9t c\u00e1ch nh\u1eb9 nh\u00e0ng, ch\u00fang s\u1ebd t\u1ef1 nhi\u00ean \u1ed5n \u0111\u1ecbnh l\u1ea1i, ph\u1ea3i kh\u00f4ng?<\/p>\n<p>V\u00ec v\u1eady, t\u00f4i s\u1ebd s\u1eeda l\u1ea1i ph\u1ea7n n\u00e0y v\u00ec c\u00e1ch vi\u1ebft trong b\u00e0i vi\u1ebft c\u0169 c\u00f2n h\u01a1i c\u1ea9u th\u1ea3.<\/p>\n<p>H\u1ed3i \u0111\u00f3 t\u00f4i \u0111\u00e3 vi\u1ebft r\u1eb1ng \u201cg\u00f3c ph\u00e2n chia gi\u1eefa s\u1ee5p \u0111\u1ed5 v\u00e0 kh\u00f4ng s\u1ee5p \u0111\u1ed5 \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 g\u00f3c ma s\u00e1t n\u1ed9i t\u1ea1i\u201d, nh\u01b0ng v\u1ec1 m\u1eb7t ch\u00ednh x\u00e1c th\u00ec g\u00f3c ngh\u1ec9 v\u00e0 g\u00f3c ma s\u00e1t n\u1ed9i t\u1ea1i kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t.<\/p>\n<ul>\n<li><strong>G\u00f3c ma s\u00e1t n\u1ed9i b\u1ed9 (\u03c6)<\/strong>: L\u00e0 h\u1eb1ng s\u1ed1 xu\u1ea5t hi\u1ec7n trong c\u00f4ng th\u1ee9c t\u00ednh \u0111\u1ed9 b\u1ec1n c\u1eaft c\u1ee7a \u0111\u1ea5t \u03c4 = c + \u03c3 tan\u03c6, bi\u1ec3u th\u1ecb g\u00f3c th\u1ec3 hi\u1ec7n \u0111\u1ed9 l\u1edbn c\u1ee7a l\u1ef1c ma s\u00e1t t\u0103ng t\u1ef7 l\u1ec7 thu\u1eadn v\u1edbi \u1ee9ng su\u1ea5t vu\u00f4ng g\u00f3c<\/li>\n<li><strong>\u0110\u1ed9 b\u00e1m d\u00ednh (c)<\/strong>: L\u1ef1c li\u00ean k\u1ebft gi\u1eefa c\u00e1c h\u1ea1t \u0111\u1ea5t, ph\u00e1t huy t\u00e1c d\u1ee5ng b\u1ea5t k\u1ec3 \u1ee9ng su\u1ea5t d\u1ecdc nh\u01b0 th\u1ebf n\u00e0o<\/li>\n<li><strong>G\u00f3c ngh\u1ec9<\/strong>: G\u00f3c d\u1ed1c m\u00e0 t\u1ea1i \u0111\u00f3 c\u00e1c h\u1ea1t ch\u1ea5t \u0111\u1eafp ch\u1ed3ng l\u00ean nhau s\u1ebd t\u1ef1 nhi\u00ean l\u1eafng xu\u1ed1ng<\/li>\n<\/ul>\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c v\u1eadt li\u1ec7u c\u00f3 \u0111\u1ed9 b\u00e1m d\u00ednh g\u1ea7n nh\u01b0 b\u1eb1ng kh\u00f4ng, ch\u1eb3ng h\u1ea1n nh\u01b0 c\u00e1t kh\u00f4, ng\u01b0\u1eddi ta cho r\u1eb1ng g\u00f3c ngh\u1ec9 g\u1ea7n b\u1eb1ng g\u00f3c ma s\u00e1t n\u1ed9i t\u1ea1i; tuy nhi\u00ean, \u0111\u1ed1i v\u1edbi \u0111\u1ea5t d\u1ebbo, hai gi\u00e1 tr\u1ecb n\u00e0y kh\u00f4ng tr\u00f9ng kh\u1edbp.<\/p>\n<p>C\u00f4ng th\u1ee9c \u03c4 = c + \u03c3 tan\u03c6 n\u00e0y ch\u00ednh l\u00e0 ti\u00eau chu\u1ea9n ph\u00e1 h\u1ee7y Coulomb.<\/p>\n<p>V\u00e0 khi \u0111\u1ed1ng c\u00e1t n\u00e0y h\u00fat \u0111\u1ea7y n\u01b0\u1edbc v\u00e0 \u0111\u1ea1t \u0111\u1ebfn tr\u1ea1ng th\u00e1i b\u00e3o h\u00f2a, n\u00f3 s\u1ebd s\u1ee5p \u0111\u1ed5. Vai tr\u00f2 c\u1ee7a c\u00e1c c\u00f4ng tr\u00ecnh ng\u0103n ch\u1eb7n nh\u01b0 c\u00f4ng tr\u00ecnh khung ph\u00e1p l\u00fd l\u00e0 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 an to\u00e0n c\u1ea7n thi\u1ebft tr\u01b0\u1edbc c\u00e1c t\u00e1c \u0111\u1ed9ng b\u00ean ngo\u00e0i ho\u1eb7c \u0111\u1ed1i v\u1edbi c\u00e1c s\u01b0\u1eddn d\u1ed1c \u0111\u00e3 tr\u1edf n\u00ean n\u1eb7ng n\u1ec1 do ng\u1ea5m n\u01b0\u1edbc.<\/p>\n<p>\u0110\u1ec3 tham kh\u1ea3o, theo \u201cH\u01b0\u1edbng d\u1eabn v\u1ec1 c\u00f4ng tr\u00ecnh \u0111\u00e0o \u0111\u1ea5t v\u00e0 \u1ed5n \u0111\u1ecbnh m\u00e1i d\u1ed1c\u201d trong l\u0129nh v\u1ef1c c\u00f4ng tr\u00ecnh \u0111\u1ea5t \u0111\u01b0\u1eddng b\u1ed9 (phi\u00ean b\u1ea3n n\u0103m Heisei 21), h\u1ec7 s\u1ed1 an to\u00e0n thi\u1ebft k\u1ebf khi thi\u1ebft k\u1ebf c\u00e1c c\u00f4ng tr\u00ecnh nh\u01b0 neo \u0111\u1ea5t \u0111\u1ec3 ph\u00f2ng ch\u1ed1ng s\u1ea1t l\u1edf \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh l\u00e0 1,2 \u0111\u1ed1i v\u1edbi c\u00f4ng tr\u00ecnh ch\u00ednh th\u1ee9c v\u00e0 1,05 \u0111\u1ed1i v\u1edbi c\u00f4ng tr\u00ecnh t\u1ea1m th\u1eddi. Con s\u1ed1 \u201c1,2\u201d th\u01b0\u1eddng \u0111\u01b0\u1ee3c nh\u1eafc \u0111\u1ebfn t\u1ea1i c\u00f4ng tr\u01b0\u1eddng ch\u00ednh l\u00e0 xu\u1ea5t ph\u00e1t t\u1eeb \u0111\u00e2y.<\/p>\n<h3>T\u1ef1 \u0111\u1ed9ng t\u00ednh to\u00e1n trong Excel | Tr\u00e1nh ph\u1ea3i th\u1ef1c hi\u1ec7n c\u00f9ng m\u1ed9t ph\u00e9p t\u00ednh hai l\u1ea7n<\/h3>\n<p>Vi\u1ec7c t\u00ednh to\u00e1n \u0111\u1ebfn \u0111\u00e2y, n\u1ebfu c\u1ee9 ph\u1ea3i l\u00e0m th\u1ee7 c\u00f4ng m\u1ed7i khi thay \u0111\u1ed5i \u0111\u1ecba \u0111i\u1ec3m thi c\u00f4ng th\u00ec qu\u1ea3 th\u1ef1c r\u1ea5t phi\u1ec1n ph\u1ee9c.<\/p>\n<p>V\u00ec t\u00f4i \u0111\u00e3 thi\u1ebft l\u1eadp s\u1eb5n trong Excel n\u00ean ch\u1ec9 c\u1ea7n nh\u1eadp di\u1ec7n t\u00edch v\u00e0 chi\u1ec1u d\u00e0i c\u1ea1nh l\u00e0 s\u1ebd t\u00ednh \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 g\u1ea7n \u0111\u00fang.<\/p>\n<p>Hi\u1ec7n t\u1ea1i, ch\u00fang t\u00f4i \u0111ang ph\u00e1t tri\u1ec3n \u1ee9ng d\u1ee5ng b\u1eb1ng tr\u00ed tu\u1ec7 nh\u00e2n t\u1ea1o.<\/p>\n<p>Khi \u0111\u00e3 s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c m\u1ed9t th\u1eddi gian (Test), t\u00f4i s\u1ebd c\u00f4ng b\u1ed1 n\u00f3, n\u00ean xin h\u00e3y ch\u1edd m\u1ed9t l\u00e1t.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-2521\" src=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2017\/02\/db7387b3e0961f6f44d5ed05e5f15b6b.jpg\" alt=\"Th\u1ee3 l\u1eafp t\u1ea5m l\u1ee3p\" width=\"600\" height=\"187\" srcset=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2017\/02\/db7387b3e0961f6f44d5ed05e5f15b6b.jpg 600w, https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2017\/02\/db7387b3e0961f6f44d5ed05e5f15b6b-300x94.jpg 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/p>\n<p>Nh\u01b0 b\u1ea3ng tr\u00ean, h\u00e3y nh\u1eadp di\u1ec7n t\u00edch (v\u00ed d\u1ee5: 600) v\u00e0o \u00f4 A1,<\/p>\n<p><strong>\u00d4 D3: = $A$1 * B3 * C3<\/strong><\/p>\n<p>Nh\u01b0 v\u1eady, c\u00f4ng th\u1ee9c \u201cdi\u1ec7n t\u00edch \u00d7 s\u1ed1 l\u01b0\u1ee3ng tr\u00ean m\u1ed7i m\u00e9t vu\u00f4ng \u00d7 t\u1ef7 l\u1ec7 hao h\u1ee5t\u201d s\u1ebd \u0111\u01b0\u1ee3c t\u00ednh ra. \u0110i\u1ec3m quan tr\u1ecdng l\u00e0 b\u1ea1n c\u1ea7n bao quanh \u00f4 A1 b\u1eb1ng k\u00fd hi\u1ec7u \u0111\u00f4 la \u0111\u1ec3 thi\u1ebft l\u1eadp tham chi\u1ebfu tuy\u1ec7t \u0111\u1ed1i. Nh\u01b0 v\u1eady, ngay c\u1ea3 khi sao ch\u00e9p xu\u1ed1ng d\u01b0\u1edbi, \u00f4 ch\u1ee9a di\u1ec7n t\u00edch c\u0169ng s\u1ebd kh\u00f4ng b\u1ecb l\u1ec7ch v\u1ecb tr\u00ed.<\/p>\n<p><strong>\u00d4 F3: = ROUNDUP(D3 \/ E3, 0)<\/strong><\/p>\n<p>\u0110\u1ed1i v\u1edbi nh\u1eefng tr\u01b0\u1eddng h\u1ee3p c\u1ea7n \u201cl\u00e0m tr\u00f2n l\u00ean\u201d nh\u01b0 s\u1ed1 th\u00f9ng hay s\u1ed1 l\u01b0\u1ee3ng, h\u00e3y s\u1eed d\u1ee5ng h\u00e0m ROUNDUP \u0111\u1ec3 l\u00e0m tr\u00f2n ph\u1ea7n th\u1eadp ph\u00e2n l\u00ean.<\/p>\n<p>Gi\u00e1 tr\u1ecb 0 c\u1ee7a tham s\u1ed1 th\u1ee9 hai c\u00f3 ngh\u0129a l\u00e0 \u201cl\u00e0m tr\u00f2n \u0111\u1ebfn 0 ch\u1eef s\u1ed1 th\u1eadp ph\u00e2n\u201d.<\/p>\n<p>N\u1ebfu s\u1eed d\u1ee5ng h\u00e0m ROUND \u0111\u1ec3 l\u00e0m tr\u00f2n s\u1ed1 n\u00e0y, 4,4 h\u1ed9p s\u1ebd tr\u1edf th\u00e0nh 4 h\u1ed9p v\u00e0 nguy\u00ean li\u1ec7u s\u1ebd kh\u00f4ng \u0111\u1ee7.<strong>V\u1ec1 nguy\u00ean t\u1eafc, t\u1ea5t c\u1ea3 c\u00e1c ph\u00e9p t\u00ednh s\u1ed1 l\u01b0\u1ee3ng \u0111\u1ec1u \u0111\u01b0\u1ee3c l\u00e0m tr\u00f2n l\u00ean<\/strong>\u0110\u00f3 l\u00e0.<\/p>\n<p>Ch\u1ec9 c\u00f3 t\u1ef7 l\u1ec7 t\u1ed5n th\u1ea5t l\u00e0 t\u00f4i kh\u00f4ng t\u1ef1 \u0111\u1ed9ng h\u00f3a, m\u00e0 v\u1eabn t\u1ef1 quy\u1ebft \u0111\u1ecbnh v\u00e0 nh\u1eadp s\u1ed1 li\u1ec7u v\u00e0o m\u1ed7i l\u1ea7n.<\/p>\n<p>\u0110\u1ed9 d\u1ed1c c\u1ee7a m\u1eb7t d\u1ed1c, s\u1ef1 hi\u1ec7n di\u1ec7n hay v\u1eafng m\u1eb7t c\u1ee7a n\u01b0\u1edbc ng\u1ea7m, th\u1eddi \u0111i\u1ec3m thi c\u00f4ng. Nh\u1eefng y\u1ebfu t\u1ed1 n\u00e0y kh\u00f4ng th\u1ec3 ph\u1ea3n \u00e1nh \u0111\u01b0\u1ee3c qua c\u00e1c c\u00f4ng th\u1ee9c to\u00e1n h\u1ecdc.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-58020\" src=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2026\/01\/2026-01-19-23.52.04-2.jpg\" alt=\"M\u1ea5t m\u00e1t do phun\" width=\"600\" height=\"450\" \/><\/p>\n<h3>Kh\u00f4ng n\u00ean quy\u1ebft \u0111\u1ecbnh \u0111\u01a1n \u0111\u1eb7t h\u00e0ng ch\u1ec9 trong m\u1ed9t l\u1ea7n | Nhi\u1ec7m v\u1ee5 c\u1ee7a qu\u1ea3n l\u00fd thi c\u00f4ng l\u00e0 gi\u1ea3m thi\u1ec3u t\u1ed5n th\u1ea5t<\/h3>\n<p>Cu\u1ed1i c\u00f9ng, t\u00f4i s\u1ebd n\u00f3i m\u1ed9t ch\u00fat v\u1ec1 c\u00e1ch cho nguy\u00ean li\u1ec7u v\u00e0o.<\/p>\n<p>S\u1ed1 l\u01b0\u1ee3ng \u0111\u00e3 xu\u1ea5t ra cho \u0111\u1ebfn nay, ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0<strong>S\u1ed1 l\u01b0\u1ee3ng tr\u00ean gi\u1ea5y t\u1edd<\/strong>\u0110\u00f3 l\u00e0.<\/p>\n<p>Tr\u00ean th\u1ef1c t\u1ebf, m\u1eb7t d\u1ed1c c\u00f3 nhi\u1ec1u ch\u1ed7 g\u1ed3 gh\u1ec1, c\u00f3 n\u01b0\u1edbc ng\u1ea7m ch\u1ea3y ra, v\u00e0 khi \u0111\u00e0o xu\u1ed1ng th\u00ec \u0111\u00f4i khi c\u0169ng g\u1eb7p ph\u1ea3i \u0111\u00e1.<\/p>\n<p>Chuy\u1ec7n thi\u1ebft k\u1ebf v\u00e0 th\u1ef1c t\u1ebf t\u1ea1i c\u00f4ng tr\u01b0\u1eddng tr\u00f9ng kh\u1edbp v\u1edbi nhau th\u00ec v\u1edbi t\u00f4i g\u1ea7n nh\u01b0 ch\u01b0a bao gi\u1edd x\u1ea3y ra c\u1ea3 (c\u01b0\u1eddi)<\/p>\n<p>V\u00ec v\u1eady, t\u00f4i chia nguy\u00ean li\u1ec7u th\u00e0nh hai nh\u00f3m ch\u00ednh \u0111\u1ec3 xem x\u00e9t.<\/p>\n<p><strong>Nh\u1eefng th\u1ee9 c\u00f3 th\u1ec3 cho v\u00e0o trong m\u1ed9t l\u1ea7n<\/strong>: L\u01b0\u1edbi th\u00e9p, ch\u1ed1t neo, \u1ed1ng tho\u00e1t n\u01b0\u1edbc  \u2192 Nh\u1eefng m\u1eb7t h\u00e0ng c\u00f3 gi\u00e1 \u0111\u01a1n v\u1ecb r\u1ebb nh\u01b0ng chi ph\u00ed v\u1eadn chuy\u1ec3n l\u1ea1i cao h\u01a1n. D\u00f9 c\u00f3 d\u01b0 m\u1ed9t ch\u00fat th\u00ec c\u0169ng c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng t\u1ea1i c\u00f4ng tr\u01b0\u1eddng ti\u1ebfp theo.<\/p>\n<p><strong>Nh\u1eefng th\u1ee9 \u0111\u01b0\u1ee3c chia th\u00e0nh 2 ph\u1ea7n<\/strong>: C\u1ed1t th\u00e9p, xi m\u0103ng, c\u00e1t  \u2192 V\u1eadt li\u1ec7u n\u1eb7ng v\u00e0 s\u1ed1 l\u01b0\u1ee3ng l\u1edbn. L\u1ea7n \u0111\u1ea7u ti\u00ean n\u00ean \u0111\u1ed5 kho\u1ea3ng 80%, sau \u0111\u00f3 \u0111i\u1ec1u ch\u1ec9nh ph\u1ea7n c\u00f2n l\u1ea1i t\u00f9y theo ti\u1ebfn \u0111\u1ed9 thi c\u00f4ng.<\/p>\n<p>\u0110\u1eb7c bi\u1ec7t l\u00e0 xi m\u0103ng, n\u1ebfu c\u00f2n th\u1eeba th\u00ec ch\u1ec9 c\u1ea7n \u0111\u1ec3 n\u00f3 \u0111\u00f4ng c\u1ee9ng l\u1ea1i r\u1ed3i v\u1ee9t \u0111i th\u00f4i.<\/p>\n<p>C\u00e1t c\u0169ng c\u00f3 tr\u01b0\u1eddng h\u1ee3p t\u1ed3i t\u1ec7 nh\u1ea5t l\u00e0 ch\u1ec9 chi\u1ebfm h\u1ebft kh\u00f4ng gian l\u01b0u tr\u1eef, r\u1ed3i cu\u1ed1i c\u00f9ng l\u1ea1i ph\u1ea3i t\u1ed1n chi ph\u00ed x\u1eed l\u00fd.<\/p>\n<p>Th\u1ef1c ra, vi\u1ec7c t\u00ednh to\u00e1n l\u01b0\u1ee3ng v\u1eadt li\u1ec7u trong khu\u00f4n m\u1eabu kh\u00f4ng ph\u1ea3i l\u00e0 \u201ck\u1ef9 thu\u1eadt t\u00ednh to\u00e1n ch\u00ednh x\u00e1c\u201d. D\u00f9 n\u00f3i v\u1eady, nh\u01b0ng n\u1ebfu k\u1ebft qu\u1ea3 kh\u00e1 s\u00e1t th\u00ec t\u00f4i c\u0169ng r\u1ea5t vui. \u0110\u1eb7c bi\u1ec7t l\u00e0 xi m\u0103ng!!! w<\/p>\n<p><strong>H\u00e3y n\u1eafm b\u1eaft t\u1ed5ng quan m\u1ed9t c\u00e1ch s\u01a1 l\u01b0\u1ee3c, v\u00e0 \u0111\u1ec3 d\u00e0nh m\u1ed9t ph\u1ea7n \u0111\u1ec3 \u0111i\u1ec1u ch\u1ec9nh sau n\u00e0y<\/strong>\u3002<\/p>\n<p>Thay v\u00ec qu\u00e1 ch\u00fa tr\u1ecdng v\u00e0o vi\u1ec7c l\u00e0m tr\u00f2n \u0111\u1ebfn c\u00e1c ch\u1eef s\u1ed1 th\u1eadp ph\u00e2n, h\u00e3y nh\u1edb kh\u00f4ng qu\u00ean th\u00eam \u201c+1\u201d, kh\u00f4ng qu\u00ean l\u00e0m tr\u00f2n l\u00ean v\u00e0 lu\u00f4n \u0111\u1ec3 l\u1ea1i d\u01b0 \u0111\u1ecba cho \u0111\u01a1n \u0111\u1eb7t h\u00e0ng l\u1ea7n th\u1ee9 hai. (C\u00e0ng nhi\u1ec1u c\u00e0ng t\u1ed1t)<\/p>\n<p>&nbsp;<\/p>\n<p>Nh\u00e2n ti\u1ec7n, ph\u01b0\u01a1ng ph\u00e1p t\u00ednh to\u00e1n \u0111\u01b0\u1ee3c n\u00eau \u1edf \u0111\u00e2y kh\u00f4ng ph\u1ea3i l\u00e0 c\u00e2u tr\u1ea3 l\u1eddi duy nh\u1ea5t \u0111\u00fang.<\/p>\n<p>C\u00f3 r\u1ea5t nhi\u1ec1u c\u00e1ch l\u00e0m, v\u00e0 m\u1ed7i c\u00f4ng ty, m\u1ed7i ng\u01b0\u1eddi \u0111\u1ec1u c\u00f3 phong c\u00e1ch ri\u00eang.<\/p>\n<p>Ph\u01b0\u01a1ng ph\u00e1p c\u1ee7a t\u00f4i l\u00e0 m\u1ed9t c\u00e1ch kh\u00e1 th\u00f4 s\u01a1, \u01b0u ti\u00ean vi\u1ec7c \u201cc\u00f3 th\u1ec3 t\u00ednh to\u00e1n ngay t\u1ea1i hi\u1ec7n tr\u01b0\u1eddng b\u1eb1ng m\u00e1y t\u00ednh b\u1ecf t\u00fai\u201d.<\/p>\n<p>N\u1ebfu ai c\u00f3 c\u00e1ch n\u00e0o hay h\u01a1n, xin h\u00e3y chia s\u1ebb v\u1edbi t\u00f4i nh\u00e9 w<\/p>\n<p>&nbsp;<\/p>\n<p>H\u1eb9n g\u1eb7p l\u1ea1i nh\u00e9.<\/p>\n<blockquote class=\"wp-embedded-content\" data-secret=\"7yCPuzwGM8\"><p><a href=\"https:\/\/norimen.net\/vi\/mat-cat-ngang-lop-phun-vua\/\">Nh\u1eefng suy ngh\u0129 khi quan s\u00e1t m\u1eb7t c\u1eaft ngang c\u1ee7a c\u00f4ng tr\u00ecnh phun v\u1eefa\uff5cPh\u00e2n t\u00edch<\/a><\/p><\/blockquote>\n<p><iframe loading=\"lazy\" class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; visibility: hidden;\" title=\"\u201cNh\u1eefng suy ngh\u0129 khi quan s\u00e1t m\u1eb7t c\u1eaft c\u1ee7a c\u00f4ng tr\u00ecnh phun v\u1eefa | Ph\u00e2n t\u00edch\u201d \u2014 L\u1edbp h\u1ecdc qu\u1ea3n l\u00fd m\u00e1i d\u1ed1c c\u1ee7a Shin-Ent\" src=\"https:\/\/norimen.net\/mortar-spray-cross-section\/embed\/#?secret=ZeTONH4dbT#?secret=7yCPuzwGM8\" data-secret=\"7yCPuzwGM8\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe><\/p>","protected":false},"excerpt":{"rendered":"<p>Xin ch\u00e0o m\u1ecdi ng\u01b0\u1eddi. T\u00f4i l\u00e0 Enta. Tr\u01b0\u1edbc \u0111\u00e2y, c\u00f3 m\u1ed9t kho\u1ea3ng th\u1eddi gian t\u00f4i \u0111\u00e3 vi\u1ebft l\u00ea th\u00ea v\u1ec1 c\u00e1ch t\u00ednh to\u00e1n v\u1eadt li\u1ec7u cho v\u00e1n khu\u00f4n, chia th\u00e0nh 7 ph\u1ea7n t\u1eeb \u201cPh\u1ea7n 1\u201d \u0111\u1ebfn \u201cPh\u1ea7n 7\u201d (c\u01b0\u1eddi). C\u00e1c ph\u1ea7n bao g\u1ed3m: L\u01b0\u1edbi th\u00e9p, D\u1ea7m d\u1ecdc, D\u1ea7m ngang, V\u00e1n khu\u00f4n, M\u00f3c neo, Xi m\u0103ng, C\u00e1t. M\u1eb7c d\u00f9 ch\u00ednh t\u00f4i l\u00e0 ng\u01b0\u1eddi vi\u1ebft, nh\u01b0ng \u0111\u1ebfn gi\u1eefa ch\u1eebng th\u00ec\u2026<\/p>","protected":false},"author":2,"featured_media":66567,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[14283],"tags":[58,61,1220,14481],"class_list":["post-66561","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-14283","tag-58","tag-61","tag-1220","tag-14481"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.2 (Yoast SEO v28.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ 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