{"id":64426,"date":"2026-05-19T08:00:49","date_gmt":"2026-05-18T23:00:49","guid":{"rendered":"https:\/\/norimen.net\/?p=64426"},"modified":"2026-05-17T20:00:53","modified_gmt":"2026-05-17T11:00:53","slug":"cau-hoi-thuong-gap-ve-thi-cong-bu-long-khoan-tu-khoan-trong-da","status":"publish","type":"post","link":"https:\/\/norimen.net\/vi\/self-drilling-rockbolt-construction-qa\/","title":{"rendered":"Nh\u1eefng \u0111i\u1ec3m c\u1ea7n l\u01b0u \u00fd khi thi c\u00f4ng bu-l\u00f4ng neo t\u1ef1 khoan | C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 khoan l\u1ed7 v\u00e0 b\u01a1m v\u1eefa \u0111\u1ec3 kh\u00f4ng b\u1ed1i r\u1ed1i t\u1ea1i c\u00f4ng tr\u01b0\u1eddng"},"content":{"rendered":"

Xin ch\u00e0o m\u1ecdi ng\u01b0\u1eddi. T\u00f4i l\u00e0 Enta.<\/p>\n

H\u00f4m nay, t\u00f4i s\u1ebd t\u1ed5ng h\u1ee3p v\u00e0 tr\u00ecnh b\u00e0y c\u00e1c \u0111i\u1ec3m c\u1ea7n l\u01b0u \u00fd khi thi c\u00f4ng bu-l\u00f4ng neo t\u1ef1 khoan d\u01b0\u1edbi d\u1ea1ng h\u1ecfi \u0111\u00e1p.<\/p>\n

T\u00f4i c\u1ea3m th\u1ea5y r\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p s\u1eed d\u1ee5ng bu-l\u00f4ng neo t\u1ef1 khoan l\u00e0 \u201cm\u1ed9t ph\u01b0\u01a1ng ph\u00e1p thi c\u00f4ng m\u00e0 c\u00e1c nh\u00e0 th\u1ea7u c\u00e0ng c\u00f3 kinh nghi\u1ec7m s\u1eed d\u1ee5ng th\u00ec c\u00e0ng th\u1eadn tr\u1ecdng\u201d.<\/p>\n

D\u00f9 tho\u1ea1t nh\u00ecn c\u00f3 v\u1ebb \u0111\u01a1n gi\u1ea3n, nh\u01b0ng c\u1ea3 ba c\u00f4ng \u0111o\u1ea1n khoan l\u1ed7, b\u01a1m ch\u1ea5t l\u1ecfng v\u00e0 \u0111o \u0111\u1ea1c \u0111\u1ec1u c\u00f3 nhi\u1ec1u y\u1ebfu t\u1ed1 c\u1ea7n xem x\u00e9t,<\/p>\n

\u0110\u00e2y l\u00e0 ph\u01b0\u01a1ng ph\u00e1p thi c\u00f4ng th\u01b0\u1eddng g\u00e2y b\u1ed1i r\u1ed1i t\u1ea1i c\u00f4ng tr\u01b0\u1eddng.<\/p>\n

Trong b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang ta s\u1ebd l\u1ea7n l\u01b0\u1ee3t t\u00ecm hi\u1ec3u c\u00e1c b\u01b0\u1edbc t\u1eeb qu\u00e1 tr\u00ecnh khoan l\u1ed7 \u0111\u1ebfn vi\u1ec7c ki\u1ec3m tra s\u1ea3n ph\u1ea9m ho\u00e0n thi\u1ec7n, t\u1eadp trung v\u00e0o nh\u1eefng c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p trong th\u1ef1c t\u1ebf.<\/p>\n

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Bu l\u00f4ng neo t\u1ef1 khoan l\u00e0 g\u00ec?<\/h2>\n

Bu l\u00f4ng neo t\u1ef1 khoan l\u00e0,M\u0169i khoan, thanh khoan, kh\u1edbp n\u1ed1i<\/strong>\u0110\u00e2y l\u00e0 ph\u01b0\u01a1ng ph\u00e1p l\u1eafp \u0111\u1eb7t bu-l\u00f4ng neo, trong \u0111\u00f3 th\u00e2n bu-l\u00f4ng \u0111\u01b0\u1ee3c gi\u1eef nguy\u00ean trong l\u1ed7 khoan, \u0111\u1ed3ng th\u1eddi ch\u1ea5t v\u1eefa \u0111\u01b0\u1ee3c b\u01a1m v\u00e0o qua l\u1ed7 trung t\u00e2m c\u1ee7a bu-l\u00f4ng \u0111\u00f3.<\/p>\n

Kh\u00e1c v\u1edbi c\u00e1c lo\u1ea1i khoan th\u00f4ng th\u01b0\u1eddng kh\u00e1c, \u0111\u1eb7c \u0111i\u1ec3m n\u1ed5i b\u1eadt c\u1ee7a lo\u1ea1i n\u00e0y l\u00e0 qu\u00e1 tr\u00ecnh khoan l\u1ed7 v\u00e0 l\u1eafp th\u00e2n \u0111\u01b0\u1ee3c ho\u00e0n t\u1ea5t \u0111\u1ed3ng th\u1eddi,\u0110\u1ea5t n\u1ec1n kh\u00f4ng c\u00f3 v\u00e1ch h\u1ed1 t\u1ef1 \u0111\u1ee9ng v\u1eefng<\/span><\/strong>v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i.<\/p>\n

Th\u00f4ng th\u01b0\u1eddng, v\u1eadt li\u1ec7u b\u01a1m \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0 h\u1ed7n h\u1ee3p xi m\u0103ng l\u1ecfng tu\u00e2n th\u1ee7 ti\u00eau chu\u1ea9n JIS A 6204.<\/p>\n

\"C\u00f4ng<\/p>\n

\n

Qu\u00e1 tr\u00ecnh chuy\u1ec3n t\u1eeb m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng c\u1ed1 \u0111\u1ecbnh sang ch\u1ee7 y\u1ebfu l\u00e0 m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng t\u1ea1m th\u1eddi<\/h2>\n

Tr\u01b0\u1edbc \u0111\u00e2y, \u0111\u00e3 c\u00f3 m\u1ed9t th\u1eddi gian ch\u00fang t\u00f4i s\u1eed d\u1ee5ng bu-l\u00f4ng neo t\u1ef1 khoan l\u00e0m gi\u1ea3i ph\u00e1p l\u1eafp \u0111\u1eb7t ch\u00ednh.<\/p>\n

Tuy nhi\u00ean,V\u1ea5n \u0111\u1ec1 v\u1ec1 \u0111\u1ed9 tin c\u1eady c\u1ee7a qu\u00e1 tr\u00ecnh b\u01a1m<\/span><\/strong>v\u00e0 hi\u1ec7n nay ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0m c\u00f4ng tr\u00ecnh t\u1ea1m th\u1eddi.<\/p>\n

Tr\u01b0\u1edbc \u0111\u00e2y, ng\u01b0\u1eddi ta \u0111\u00e3 ch\u1ec9 ra r\u1eb1ng vi\u1ec7c x\u00e1c nh\u1eadn li\u1ec7u ch\u1ea5t b\u01a1m c\u00f3 \u0111\u01b0\u1ee3c ph\u00e2n b\u1ed1 \u0111\u1ed3ng \u0111\u1ec1u \u0111\u1ebfn t\u1eadn \u0111\u00e1y l\u1ed7 hay kh\u00f4ng l\u00e0 r\u1ea5t kh\u00f3, d\u1eabn \u0111\u1ebfn s\u1ef1 kh\u00f4ng ch\u1eafc ch\u1eafn trong vi\u1ec7c \u0111\u1ea3m b\u1ea3o c\u01b0\u1eddng \u0111\u1ed9 thi\u1ebft k\u1ebf.<\/p>\n

M\u1eb7t kh\u00e1c, trong nh\u1eefng n\u0103m g\u1ea7n \u0111\u00e2y,Ti\u00eau chu\u1ea9n m\u1ea1 k\u1ebdm n\u00f3ng ch\u1ea3y (t\u01b0\u01a1ng \u0111\u01b0\u01a1ng JIS H 8641 HDZ55)<\/strong>C\u00e1c ph\u01b0\u01a1ng ph\u00e1p x\u00e1c nh\u1eadn vi\u1ec7c b\u01a1m ch\u1ea5t l\u1ecfng \u0111ang \u0111\u01b0\u1ee3c c\u1ea3i ti\u1ebfn, v\u00e0 t\u00f9y theo \u0111i\u1ec1u ki\u1ec7n, \u0111\u00e3 c\u00f3 nh\u1eefng tr\u01b0\u1eddng h\u1ee3p ph\u01b0\u01a1ng ph\u00e1p n\u00e0y \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng trong c\u00e1c c\u00f4ng tr\u00ecnh ch\u00ednh th\u1ee9c.<\/p>\n

Tuy nhi\u00ean, \u0111\u00e2y l\u00e0 v\u1ea5n \u0111\u1ec1 c\u1ea7n \u0111\u01b0\u1ee3c quy\u1ebft \u0111\u1ecbnh sau khi tham kh\u1ea3o \u00fd ki\u1ebfn c\u1ee7a nh\u00e0 thi\u1ebft k\u1ebf; xin l\u01b0u \u00fd r\u1eb1ng kh\u00f4ng th\u1ec3 t\u1ef1 \u00fd chuy\u1ec3n \u0111\u1ed5i gi\u1eefa c\u00f4ng tr\u00ecnh ch\u00ednh th\u1ee9c v\u00e0 c\u00f4ng tr\u00ecnh t\u1ea1m th\u1eddi t\u1ea1i c\u00f4ng tr\u01b0\u1eddng.<\/p>\n

Nh\u1eefng v\u1ecb tr\u00ed thi c\u00f4ng m\u00e0 m\u00e1y khoan c\u1ee1 nh\u1ecf kh\u00f4ng th\u1ec3 mang \u0111\u1ebfn c\u0169ng th\u01b0\u1eddng l\u00e0 ch\u1ee7 \u0111\u1ec1 \u0111\u01b0\u1ee3c \u0111\u01b0a ra th\u1ea3o lu\u1eadn.<\/p>\n

\n

C\u00e1c y\u1ebfu t\u1ed1 c\u1ea7n xem x\u00e9t khi khoan l\u1ed7<\/h2>\n

Vi\u1ec7c x\u00e1c \u0111\u1ecbnh v\u1ecb tr\u00ed khoan r\u1ea5t \u0111\u01a1n gi\u1ea3n,\u201cC\u00f3 con Kuriko (Slime khoan l\u1ed7) xu\u1ea5t hi\u1ec7n kh\u00f4ng?\u201d<\/span><\/strong>\u0110\u00f3 l\u00e0.<\/p>\n

Ch\u1eebng n\u00e0o c\u00f2n th\u1ea5y ch\u1ea5t th\u1ea3i khoan \u0111\u01b0\u1ee3c th\u1ea3i ra, c\u00f3 th\u1ec3 k\u1ebft lu\u1eadn r\u1eb1ng th\u00e0nh l\u1ed7 khoan v\u1eabn gi\u1eef \u0111\u01b0\u1ee3c \u0111\u1ed9 v\u1eefng ch\u1eafc nh\u1ea5t \u0111\u1ecbnh v\u00e0 qu\u00e1 tr\u00ecnh khoan \u0111ang di\u1ec5n ra b\u00ecnh th\u01b0\u1eddng.<\/p>\n

Ng\u01b0\u1ee3c l\u1ea1i, khi ti\u1ebfng k\u00eau \u201ckri-ko\u201d gi\u1ea3m \u0111i \u0111\u00e1ng k\u1ec3 ho\u1eb7c ng\u1eebng h\u1eb3n, c\u00f3 th\u1ec3 l\u00e0 do th\u00e0nh l\u1ed7 b\u1ecb s\u1ee5p \u0111\u1ed5 ho\u1eb7c \u0111\u1ea7u l\u1ed7 b\u1ecb t\u1eafc.<\/p>\n

Thao t\u00e1c c\u01a1 b\u1ea3n l\u00e0 k\u00e9o c\u1ea7n c\u00e2u l\u1ea1i kho\u1ea3ng 20\u201350 cm, ki\u1ec3m tra xem m\u1ed3i \u0111\u00e3 \u0111\u01b0\u1ee3c th\u1ea3 ra b\u1eb1ng kh\u00ed n\u00e9n hay ch\u01b0a, r\u1ed3i m\u1edbi th\u1ea3 l\u1ea1i.<\/p>\n

N\u1ebfu ti\u1ebfp t\u1ee5c \u0111\u1ea9y que th\u0103m d\u00f2 v\u1ec1 ph\u00eda tr\u01b0\u1edbc trong khi ch\u01b0a th\u1ea5y ch\u1ea5t l\u1ecfng tr\u00e0o ra, nguy c\u01a1 que th\u0103m d\u00f2 b\u1ecb g\u00e3y ho\u1eb7c v\u1eefa kh\u00f4ng \u0111\u01b0\u1ee3c ph\u00e2n ph\u1ed1i \u0111\u1ec1u kh\u1eafp khu v\u1ef1c khi b\u01a1m s\u1ebd t\u0103ng cao.<\/p>\n

V\u00ec n\u1ebfu ph\u00e1t hi\u1ec7n ra khi ki\u1ec3m tra k\u00edch th\u01b0\u1edbc sau n\u00e0y th\u00ec th\u01b0\u1eddng \u0111\u00e3 qu\u00e1 mu\u1ed9n, n\u00ean vi\u1ec7c quan s\u00e1t ngay t\u1eeb giai \u0111o\u1ea1n khoan l\u1ed7 l\u00e0 r\u1ea5t quan tr\u1ecdng.<\/p>\n

Trong qu\u00e1 tr\u00ecnh khoan t\u1ef1 khoan, ki\u1ec3u \u201cIkike\u201d l\u00e0 kh\u00f4ng th\u1ec3 th\u1ef1c hi\u1ec7n \u0111\u01b0\u1ee3c!<\/p>\n

\"T\u00ecnh<\/p>\n

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Nh\u1eefng nguy\u00ean t\u1eafc c\u01a1 b\u1ea3n kh\u00f4ng \u0111\u01b0\u1ee3c b\u1ecf qua khi ti\u00eam<\/h2>\n

Vi\u1ec7c b\u01a1m v\u1eefa v\u00e0o bu-l\u00f4ng neo t\u1ef1 khoan l\u00e0,L\u1ed7 \u1edf ch\u00ednh gi\u1eefa th\u00e2n c\u1ea7n c\u00e2u (\u0111\u01b0\u1eddng k\u00ednh trong kho\u1ea3ng 13 mm)<\/strong>S\u1ebd b\u1eaft \u0111\u1ea7u t\u1eeb \u0111\u00e2y.<\/p>\n

Do \u0111\u00e2y kh\u00f4ng ph\u1ea3i l\u00e0 ph\u01b0\u01a1ng ph\u00e1p s\u1eed d\u1ee5ng \u1ed1ng b\u01a1m ri\u00eang bi\u1ec7t, n\u00ean n\u1ebfu b\u00ean trong thanh khoan b\u1ecb t\u1eafc do m\u1ea3nh v\u1ee5n khoan th\u00ec s\u1ebd kh\u00f4ng th\u1ec3 b\u01a1m t\u1eeb \u0111\u1ea7u thanh khoan \u0111\u01b0\u1ee3c.<\/p>\n

Khi ho\u00e0n t\u1ea5t vi\u1ec7c khoan l\u1ed7, b\u1eaft bu\u1ed9c ph\u1ea3i ki\u1ec3m tra xem kh\u00ed c\u00f3 \u0111i qua \u0111\u01b0\u1ee3c qua thanh khoan hay kh\u00f4ng.<\/p>\n

Nguy\u00ean t\u1eafc c\u01a1 b\u1ea3n c\u1ee7a vi\u1ec7c ti\u00eam l\u00e0\u201cTi\u00eam t\u1eeb ph\u1ea7n s\u00e2u nh\u1ea5t v\u00e0 ki\u1ec3m tra xem ch\u1ea5t l\u1ecfng c\u00f3 tr\u00e0o ng\u01b0\u1ee3c l\u00ean \u0111\u1ebfn v\u00f9ng mi\u1ec7ng hay kh\u00f4ng\u201d<\/span><\/strong>.<\/p>\n

N\u1ebfu kh\u00f4ng l\u00e0m \u0111\u01b0\u1ee3c \u0111i\u1ec1u n\u00e0y, bu-l\u00f4ng neo s\u1ebd ch\u1ec9 \u0111\u01b0\u1ee3c l\u1ea5p \u0111\u1ea7y m\u1ed9t ph\u1ea7n, v\u00e0 trong tr\u01b0\u1eddng h\u1ee3p c\u1ef1c \u0111oan, c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn t\u00ecnh tr\u1ea1ng ch\u1ec9 l\u00e0 thanh c\u1ed1t th\u00e9p c\u1eafm v\u00e0o m\u00e0 th\u00f4i.<\/p>\n

V\u00ec v\u1eady, sau khi khoan l\u1ed7, li\u1ec7u c\u00f3 xu\u1ea5t hi\u1ec7n ch\u1ea5t nh\u1ea7y (slime) kh\u00f4ng? N\u1ebfu kh\u00f4ng c\u00f3, h\u00e3y \u0111\u1eb7t mi\u1ec7ng v\u00e0o que v\u00e0 th\u1ed5i v\u00e0o \u0111\u00f3 th\u1eed xem.<\/p>\n

N\u1ebfu v\u1eabn kh\u00f4ng th\u1ed5i \u0111\u01b0\u1ee3c, h\u00e3y r\u00fat thanh ra m\u1ed9t l\u1ea7n \u0111\u1ec3 th\u00f4ng t\u1eafc, sau \u0111\u00f3 khoan l\u1ea1i l\u1ed7 v\u00e0 l\u1eafp v\u00e0o l\u1ea7n n\u1eefa.<\/p>\n

Sau khi ki\u1ec3m tra s\u1ef1 tr\u1edf l\u1ea1i c\u1ee7a v\u1eefa t\u1eeb mi\u1ec7ng \u1ed1ng, \u0111i\u1ec1u quan tr\u1ecdng l\u00e0 ph\u1ea3i l\u1eafc thanh (t\u1ea1o rung \u0111\u1ed9ng) \u0111\u1ec3 th\u00fac \u0111\u1ea9y s\u1ef1 b\u00e1m d\u00ednh c\u1ee7a v\u1eefa.<\/p>\n

N\u1ebfu kh\u00f4ng c\u00f3 b\u1ed9 chuy\u1ec3n \u0111\u1ed5i chuy\u00ean d\u1ee5ng th\u00ec vi\u1ec7c b\u01a1m ch\u1ea5t l\u1ecfng s\u1ebd kh\u00f4ng th\u1ec3 th\u1ef1c hi\u1ec7n \u0111\u01b0\u1ee3c<\/strong>V\u00ec v\u1eady, vi\u1ec7c chu\u1ea9n b\u1ecb thi\u1ebft b\u1ecb tr\u01b0\u1edbc c\u0169ng r\u1ea5t quan tr\u1ecdng.<\/p>\n

\"Ki\u1ec3m<\/p>\n

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C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p t\u1ea1i hi\u1ec7n tr\u01b0\u1eddng (Q&A)<\/h2>\n

T\u1eeb \u0111\u00e2y, ch\u00fang t\u00f4i s\u1ebd tr\u1ea3 l\u1eddi nh\u1eefng c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p trong th\u1ef1c t\u1ebf t\u1ea1i hi\u1ec7n tr\u01b0\u1eddng ho\u1eb7c qua c\u00e1c y\u00eau c\u1ea7u t\u01b0 v\u1ea5n.<\/p>\n

C\u00e2u h\u1ecfi 1. Trong qu\u00e1 tr\u00ecnh khoan, ch\u1ea5t b\u00f4i tr\u01a1n \u0111\u1ed9t ng\u1ed9t ng\u1eebng ch\u1ea3y ra. T\u00f4i c\u00f3 th\u1ec3 ti\u1ebfp t\u1ee5c kh\u00f4ng?<\/h3>\n

A. Vui l\u00f2ng t\u1ea1m d\u1eebng vi\u1ec7c \u0111\u1ea9y thanh khoan. C\u00f3 th\u1ec3 l\u00e0 do th\u00e0nh l\u1ed7 b\u1ecb s\u1ee5p \u0111\u1ed5 ho\u1eb7c m\u0169i khoan b\u1ecb k\u1eb9t.<\/p>\n

K\u00e9o c\u1ea7n c\u00e2u l\u1ea1i kho\u1ea3ng 20\u201350 cm, ki\u1ec3m tra xem kh\u00ed \u0111\u00e3 \u0111\u01b0\u1ee3c x\u1ea3 ra l\u1ea1i ch\u01b0a r\u1ed3i m\u1edbi th\u1ea3 l\u1ea1i<\/strong>\u0110\u00f3 l\u00e0 \u0111\u1ed9ng t\u00e1c c\u01a1 b\u1ea3n.<\/p>\n

N\u1ebfu t\u00ecnh tr\u1ea1ng v\u1eabn kh\u00f4ng \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n, h\u00e3y r\u00fat thanh khoan ra \u0111\u1ec3 th\u00f4ng t\u1eafc v\u00e0 ti\u1ebfn h\u00e0nh khoan l\u1ea1i.<\/p>\n

C\u00e2u h\u1ecfi 2. C\u00f3 th\u1ec3 khoan l\u1ed7 tr\u00ean c\u00e1c lo\u1ea1i \u0111\u00e1 d\u1ed1c c\u00f3 gi\u00e1 tr\u1ecb N d\u01b0\u1edbi 10 ho\u1eb7c \u0111\u00e1 b\u1ecb phong h\u00f3a m\u1ea1nh kh\u00f4ng?<\/h3>\n

A. T\u00f9y thu\u1ed9c v\u00e0o \u0111i\u1ec1u ki\u1ec7n, nh\u01b0ng \u0111\u1ed9 kh\u00f3 s\u1ebd t\u0103ng l\u00ean \u0111\u00e1ng k\u1ec3. Trong \u0111i\u1ec1u ki\u1ec7n \u0111\u1ea5t n\u1ec1n kh\u00f4ng th\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ednh t\u1ef1 \u0111\u1ee9ng c\u1ee7a th\u00e0nh l\u1ed7 khoan, vi\u1ec7c khoan l\u1ed7 s\u1ebd g\u1eb7p nhi\u1ec1u kh\u00f3 kh\u0103n v\u00e0 vi\u1ec7c x\u00e1c nh\u1eadn d\u00f2ng ch\u1ea3y h\u1ed3i l\u01b0u sau khi b\u01a1m c\u0169ng tr\u1edf n\u00ean kh\u00f3 kh\u0103n h\u01a1n.<\/p>\n

Khi khoan \u0111\u1ebfn ph\u1ea7n v\u00e1ch \u0111\u00e1 d\u1ed1c, v\u1eefa l\u1ea5p c\u00f3 kh\u1ea3 n\u0103ng cao s\u1ebd tr\u00e0n sang c\u00e1c khu v\u1ef1c kh\u00e1c, do \u0111\u00f3 vi\u1ec7c t\u1ef1 khoan s\u1ebd g\u1eb7p ph\u1ea3i \u0111i\u1ec1u ki\u1ec7n v\u00f4 c\u00f9ng kh\u00f3 kh\u0103n.<\/p>\n

N\u1ebfu l\u1eafp kh\u1edbp xoay v\u00e0o m\u00e1y khoan (m\u00e1y khoan \u0111\u00e1) v\u00e0 khoan \u0111\u1ea5t s\u00e9t v.v. trong h\u00e0o n\u01b0\u1edbc, vi\u1ec7c khoan s\u1ebd tr\u1edf n\u00ean d\u1ec5 d\u00e0ng h\u01a1n h\u1eb3n.<\/p>\n

Trong m\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p, c\u1ea7n th\u1ea3o lu\u1eadn v\u1edbi ch\u1ee7 \u0111\u1ea7u t\u01b0 v\u1ec1 vi\u1ec7c thay \u0111\u1ed5i ph\u01b0\u01a1ng ph\u00e1p thi c\u00f4ng<\/strong>\u0110\u00fang v\u1eady. Thay v\u00ec c\u1ed1 \u00e9p th\u00f4ng qua r\u1ed3i sau n\u00e0y m\u1edbi ph\u00e1t hi\u1ec7n ra l\u1ed7i thi c\u00f4ng, vi\u1ec7c th\u1ea3o lu\u1eadn tr\u01b0\u1edbc s\u1ebd l\u00e0 con \u0111\u01b0\u1eddng ng\u1eafn nh\u1ea5t x\u00e9t v\u1ec1 m\u1eb7t k\u1ebft qu\u1ea3.<\/p>\n

Trong nh\u1eefng tr\u01b0\u1eddng h\u1ee3p t\u1ed3i t\u1ec7 nh\u01b0 th\u1ebf n\u00e0y, kh\u1ea3 n\u0103ng ph\u1ea3i khoan l\u1ed7 hai \u1ed1ng l\u00e0 r\u1ea5t cao. (N\u1ebfu c\u00f3 th\u1ec3 th\u00ec t\u1ed1t nh\u1ea5t l\u00e0...)<\/p>\n

C\u00e2u h\u1ecfi 3. L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 ph\u00e2n bi\u1ec7t c\u00e1ch s\u1eed d\u1ee5ng m\u0169i khoan s\u1eaft v\u00e0 m\u0169i khoan c\u00f3 \u0111\u1ea7u c\u1eaft?<\/h3>\n

A. S\u1eed d\u1ee5ng t\u00f9y theo \u0111\u1ed9 c\u1ee9ng c\u1ee7a n\u1ec1n \u0111\u1ea5t. M\u0169i khoan s\u1eaft th\u00edch h\u1ee3p v\u1edbi n\u1ec1n \u0111\u1ea5t t\u01b0\u01a1ng \u0111\u1ed1i m\u1ec1m, v\u00e0 s\u1ebd kh\u00f4ng ti\u1ebfn \u0111\u01b0\u1ee3c khi ch\u1ea1m v\u00e0o l\u1edbp \u0111\u00e1.<\/p>\n

M\u0169i khoan c\u00f3 l\u01b0\u1ee1i c\u1eaft (l\u01b0\u1ee1i c\u1eaft b\u1eb1ng h\u1ee3p kim c\u1ee9ng) c\u00f3 th\u1ec3 khoan \u0111\u01b0\u1ee3c tr\u00ean c\u00e1c lo\u1ea1i \u0111\u00e1 n\u1ec1n \u0111\u1ebfn m\u1ed9t m\u1ee9c \u0111\u1ed9 nh\u1ea5t \u0111\u1ecbnh, nh\u01b0ng n\u1ebfu thanh khoan ph\u1ea3i ch\u1ecbu t\u1ea3i tr\u1ecdng qu\u00e1 l\u1edbn t\u1ea1i nh\u1eefng \u0111o\u1ea1n \u0111\u00e1 n\u1ec1n thay \u0111\u1ed5i \u0111\u1ed9t ng\u1ed9t, nguy c\u01a1 thanh khoan b\u1ecb g\u00e3y s\u1ebd t\u0103ng cao.<\/p>\n

S\u1ef1 \u0111i\u1ec1u ch\u1ec9nh l\u1ef1c v\u1eeba ph\u1ea3i v\u00e0<\/b>Vi\u1ec7c quan s\u00e1t s\u1ef1 \u0111\u1ea3o chi\u1ec1u c\u1ee7a Kriko l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh r\u00fat lui.<\/p>\n

C\u00e2u h\u1ecfi 4. Chi\u1ec1u d\u00e0i t\u1ed1i \u0111a c\u1ee7a l\u1ed7 khoan th\u1ee7 c\u00f4ng l\u00e0 bao nhi\u00eau?<\/h3>\n

A. V\u1ec1 m\u1eb7t t\u00ednh to\u00e1n,Kho\u1ea3ng 2,5m l\u00e0 m\u1ed9t m\u1ee9c tham kh\u1ea3o<\/strong>. N\u1ebfu chi\u1ec1u d\u00e0i v\u01b0\u1ee3t qu\u00e1 m\u1ee9c n\u00e0y, vi\u1ec7c xem x\u00e9t chuy\u1ec3n sang khoan b\u1eb1ng m\u00e1y l\u00e0 m\u1ed9t gi\u1ea3i ph\u00e1p th\u1ef1c t\u1ebf.<\/p>\n

N\u1ebfu ti\u1ebfp t\u1ee5c k\u00e9o d\u00e0i th\u00eam b\u1eb1ng c\u00e1ch \u0111\u00e0o b\u1eb1ng tay, l\u01b0\u1ee1i dao Kriko s\u1ebd kh\u00f3 quay tr\u1edf l\u1ea1i.<\/p>\n

Tuy nhi\u00ean, m\u1eb7c d\u00f9 c\u00f4ng ty ch\u00fang t\u00f4i \u0111\u00e3 c\u00f3 kinh nghi\u1ec7m thi c\u00f4ng \u1edf \u0111\u1ed9 s\u00e2u t\u1ed1i \u0111a 5m, nh\u01b0ng \u0111i\u1ec1u n\u00e0y c\u00f2n t\u00f9y thu\u1ed9c v\u00e0o ch\u1ea5t l\u01b0\u1ee3ng \u0111\u1ea5t, v\u00e0 ch\u00fang t\u00f4i \u0111\u00e3 th\u1ef1c hi\u1ec7n b\u1eb1ng c\u00e1ch k\u1ebft h\u1ee3p s\u1eed d\u1ee5ng kh\u1edbp xoay v\u00e0 \u0111\u00e0o h\u00e0o.<\/p>\n

Ngo\u00e0i ra, vi\u1ec7c thu h\u1ed3i Kriko (slime khoan l\u1ed7) c\u0169ng r\u1ea5t quan tr\u1ecdng n\u00ean t\u00f4i ph\u1ea3i h\u1ebft s\u1ee9c c\u1ea9n th\u1eadn.<\/p>\n

C\u00e2u h\u1ecfi 5. Sau khi b\u01a1m, vi\u1ec7c \u0111o k\u00edch th\u01b0\u1edbc \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n nh\u01b0 th\u1ebf n\u00e0o?<\/h3>\n

A. V\u00ec \u0111\u00e2y l\u00e0 ph\u01b0\u01a1ng ph\u00e1p thi c\u00f4ng kh\u00f4ng c\u1ea7n th\u00e1o thanh gi\u1eb1ng, n\u00ean,\u0110\u01b0a d\u00e2y v\u00e0o l\u1ed7 trung t\u00e2m (l\u1ed7 \u0111\u1ec3 b\u01a1m) \u0111\u1ec3 ki\u1ec3m tra chi\u1ec1u d\u00e0i<\/strong>S\u1ebd l\u00e0m.<\/p>\n

\u0110\u00e2y l\u00e0 ph\u01b0\u01a1ng ph\u00e1p c\u1eaft d\u00e2y c\u00f3 \u0111\u01b0\u1eddng k\u00ednh kho\u1ea3ng 2\u20133 mm th\u00e0nh c\u00e1c \u0111o\u1ea1n c\u00f3 \u0111\u1ed9 d\u00e0i quy \u0111\u1ecbnh \u0111\u1ec3 ki\u1ec3m tra \u0111\u1ed9 s\u00e2u ti\u1ebfp c\u1eadn.<\/p>\n

Do d\u00e2y kh\u00f4ng th\u1ec3 ti\u1ebfp c\u1eadn \u0111\u1ebfn ph\u1ea7n bit, n\u00ean ch\u00fang t\u00f4i s\u1ebd tr\u1eeb \u0111i kho\u1ea3ng c\u00e1ch \u0111\u00f3 (th\u01b0\u1eddng kho\u1ea3ng 30 mm) tr\u01b0\u1edbc khi \u0111\u00e1nh gi\u00e1.<\/p>\n

Vui l\u00f2ng \u0111o th\u1ef1c t\u1ebf chi\u1ec1u d\u00e0i kh\u1ea5u tr\u1eeb c\u1ee5 th\u1ec3 d\u1ef1a tr\u00ean s\u1ed1 bit \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng.<\/p>\n

Tr\u01b0\u1edbc khi khoan l\u1ed7, b\u1ea1n n\u00ean ki\u1ec3m tra d\u00e2y \u0111o \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 ch\u00ednh x\u00e1c.<\/p>\n

C\u00e2u h\u1ecfi 6. N\u1ebfu kh\u00f4ng c\u00f3 ph\u1ea3n h\u1ed3i t\u1eeb khu v\u1ef1c mi\u1ec7ng, n\u00ean ki\u1ec3m tra ph\u1ea7n n\u00e0o?<\/h3>\n

A. C\u00f3 ba nguy\u00ean nh\u00e2n ch\u00ednh. (1) L\u1ed7 trung t\u00e2m c\u1ee7a thanh b\u1ecb t\u1eafc, (2) V\u1eefa b\u1ecb tr\u00e0n ra ngo\u00e0i do th\u00e0nh l\u1ed7 b\u1ecb s\u1ee5p \u0111\u1ed5, (3) T\u1eafc ngh\u1ebdn do th\u00e0nh l\u1ed7 b\u1ecb s\u1ee5p \u0111\u1ed5.<\/p>\n

Ki\u1ec3m tra lu\u1ed3ng kh\u00ed \u0111i qua b\u00ean trong thanh<\/strong>V\u00e0, \u0111i\u1ec1u quan tr\u1ecdng l\u00e0 sau khi \u0111\u1ed5 b\u00ea t\u00f4ng, thanh \u0111o c\u00f3 di chuy\u1ec3n \u0111\u01b0\u1ee3c hay kh\u00f4ng?<\/p>\n

Ngo\u00e0i ra, n\u1ebfu kh\u00ed \u0111\u00e3 x\u00e2m nh\u1eadp v\u00e0o b\u00ean trong, vi\u1ec7c t\u0103ng \u00e1p su\u1ea5t c\u1ee7a m\u00e1y b\u01a1m \u0111\u1ec3 b\u01a1m ch\u1ea5t l\u1ecfng v\u00e0o s\u1ebd l\u00e0m t\u0103ng kh\u1ea3 n\u0103ng ch\u1ea5t l\u1ecfng d\u00e2ng l\u00ean.<\/p>\n

C\u00e2u h\u1ecfi 7. N\u00ean quan s\u00e1t Yohori \u1edf m\u1ee9c \u0111\u1ed9 n\u00e0o l\u00e0 ph\u00f9 h\u1ee3p?<\/h3>\n

A. G\u1eedi Tr\u01b0\u1edfng ph\u00f2ng Thi\u1ebft k\u1ebfM\u1ed9t kho\u1ea3ng tr\u1ed1ng h\u01a1i r\u1ed9ng h\u01a1n m\u1ed9t ch\u00fat<\/strong>N\u1ebfu s\u1eed d\u1ee5ng s\u1ea3n ph\u1ea9m n\u00e0y, nguy c\u01a1 t\u1eafc ngh\u1ebdn \u1edf \u0111\u1ea7u \u1ed1ng s\u1ebd gi\u1ea3m xu\u1ed1ng.<\/p>\n

Tuy nhi\u00ean, khi \u0111\u00e0o r\u00e3nh tho\u00e1t n\u01b0\u1edbc qua c\u00e1c l\u1edbp \u0111\u1ea5t y\u1ebfu nh\u01b0 l\u1edbp than b\u00f9n, do c\u00f3 nguy c\u01a1 n\u01b0\u1edbc ch\u1ea3y ng\u01b0\u1ee3c n\u00ean kh\u00f4ng th\u1ec3 \u0111\u01a1n thu\u1ea7n t\u0103ng k\u00edch th\u01b0\u1edbc r\u00e3nh m\u1ed9t c\u00e1ch t\u00f9y ti\u1ec7n, m\u00e0 c\u1ea7n ph\u1ea3i \u0111i\u1ec1u ch\u1ec9nh d\u1ef1a tr\u00ean \u0111i\u1ec1u ki\u1ec7n \u0111\u1ecba ch\u1ea5t th\u1ef1c t\u1ebf.<\/p>\n

\"Bu<\/p>\n

\n

Nh\u1eefng d\u1ea5u hi\u1ec7u gi\u00fap nh\u1eadn bi\u1ebft nh\u00e0 th\u1ea7u c\u00f3 kinh nghi\u1ec7m<\/h2>\n

Cu\u1ed1i c\u00f9ng, t\u00f4i s\u1ebd n\u00eau ra c\u00e1ch nh\u1eadn bi\u1ebft c\u00e1c nh\u00e0 th\u1ea7u hi\u1ec3u r\u00f5 v\u1ec1 bu-l\u00f4ng neo t\u1ef1 khoan.<\/p>\n

\u0110\u00e2y l\u00e0 chuy\u1ec7n x\u1ea3y ra sau khi \u0111\u1eb7t h\u00e0ng, n\u00ean ch\u1ec9 mang t\u00ednh ch\u1ea5t tham kh\u1ea3o th\u00f4i.<\/p>\n

    \n
  • T\u00f4i \u0111\u00e3 mang theo \u0111\u1ea7y \u0111\u1ee7 c\u00e1c thanh ch\u1ea5n \u0111\u1ed9ng d\u1ef1 ph\u00f2ng<\/span><\/strong>: \u0110\u00e2y l\u00e0 b\u1eb1ng ch\u1ee9ng cho th\u1ea5y b\u1ea1n \u0111\u00e3 hi\u1ec3u r\u00f5 r\u1ee7i ro m\u1ea5t m\u00e1t.<\/li>\n
  • T\u00f4i \u0111ang s\u1edf h\u1eefu m\u1ed9t kh\u1edbp xoay d\u00e0nh cho bu-l\u00f4ng neo<\/span><\/strong>: C\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n khoan \u0111\u1ebfn m\u1ef1c n\u01b0\u1edbc, gi\u00fap qu\u00e1 tr\u00ecnh khoan di\u1ec5n ra \u1ed5n \u0111\u1ecbnh. S\u1ed1 l\u01b0\u1ee3ng ch\u1ee7 s\u1edf h\u1eefu thi\u1ebft b\u1ecb xoay (swivel) l\u1ea1i \u00edt h\u01a1n ng\u01b0\u1eddi ta t\u01b0\u1edfng.<\/li>\n
  • Ch\u00fang t\u00f4i c\u00f3 s\u1eb5n nhi\u1ec1u k\u00edch c\u1ee1 b\u1ed9 chuy\u1ec3n \u0111\u1ed5i b\u01a1m<\/span><\/strong>: Ch\u00fang t\u00f4i c\u00f3 kh\u1ea3 n\u0103ng \u1ee9ng ph\u00f3 linh ho\u1ea1t t\u1ea1i hi\u1ec7n tr\u01b0\u1eddng \u0111\u1ec3 th\u00edch \u1ee9ng v\u1edbi c\u00e1c \u0111\u01b0\u1eddng k\u00ednh thanh kh\u00e1c nhau.<\/li>\n
  • C\u00f3 th\u1ec3 \u0111\u00e1nh gi\u00e1 ch\u1ea5t l\u01b0\u1ee3ng n\u1ec1n \u0111\u1ea5t d\u1ef1a v\u00e0o m\u00e0u s\u1eafc v\u00e0 l\u01b0\u1ee3ng \u0111\u1ea5t c\u1ee7a Kriko<\/span><\/strong>: \u0110i\u1ec3m kinh nghi\u1ec7m \u0111\u01b0\u1ee3c t\u00ednh v\u00e0o quy\u1ebft \u0111\u1ecbnh khoan l\u1ed7.<\/li>\n<\/ul>\n

    Ng\u01b0\u1ee3c l\u1ea1i, nh\u1eefng \u0111\u01a1n v\u1ecb ngay l\u1eadp t\u1ee9c tr\u1ea3 l\u1eddi r\u1eb1ng \u201cT\u1ef1 x\u1ecf l\u1ed7 tai r\u1ea5t \u0111\u01a1n gi\u1ea3n\u201d th\u00ec c\u00e1 nh\u00e2n t\u00f4i kh\u00f4ng m\u1ea5y khuy\u1ebfn kh\u00edch.<\/p>\n

    C\u00f3 th\u1ec3 h\u1ecd ch\u01b0a th\u1ef1c s\u1ef1 tr\u1ea3i nghi\u1ec7m \u0111\u1ea7y \u0111\u1ee7 nh\u1eefng kh\u00f3 kh\u0103n trong qu\u00e1 tr\u00ecnh khoan v\u00e0 b\u01a1m ch\u1ea5t l\u1ecfng.<\/p>\n

    Bu l\u00f4ng neo t\u1ef1 khoan l\u00e0 ph\u01b0\u01a1ng ph\u00e1p thi c\u00f4ng t\u01b0\u01a1ng t\u00e1c v\u1edbi n\u1ec1n \u0111\u1ea5t.<\/p>\n

    L\u01b0\u1ee3ng ch\u1ea5t l\u1ecfng trong \u1ed1ng b\u01a1m, \u0111\u1ed9 rung c\u1ee7a c\u1ea7n c\u00e2u, t\u1ed1c \u0111\u1ed9 tr\u1edf l\u1ea1i c\u1ee7a d\u00f2ng ch\u1ea5t l\u1ecfng sau khi b\u01a1m v\u00e0o \u2014 t\u1ea5t c\u1ea3 \u0111\u1ec1u \u0111\u01b0\u1ee3c h\u00ecnh th\u00e0nh t\u1eeb s\u1ef1 t\u00edch l\u0169y nh\u1eefng th\u00f4ng tin ch\u1ec9 c\u00f3 th\u1ec3 n\u1eafm b\u1eaft \u0111\u01b0\u1ee3c t\u1ea1i hi\u1ec7n tr\u01b0\u1eddng.<\/p>\n

    Ch\u1ec9 \u0111\u1ecdc h\u01b0\u1edbng d\u1eabn thi c\u00f4ng th\u00f4i th\u00ec kh\u00f4ng th\u1ec3 n\u1eafm \u0111\u01b0\u1ee3c nh\u1eefng \u0111i\u1ec3m m\u1ea5u ch\u1ed1t c\u1ee7a ph\u01b0\u01a1ng ph\u00e1p thi c\u00f4ng n\u00e0y.<\/p>\n

    L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 truy\u1ec1n \u0111\u1ea1t kinh nghi\u1ec7m v\u00e0 b\u1ea3n n\u0103ng c\u1ee7a nh\u1eefng th\u1ee3 l\u00e0nh ngh\u1ec1 v\u00e0 qu\u1ea3n l\u00fd thi c\u00f4ng gi\u00e0u kinh nghi\u1ec7m cho th\u1ebf h\u1ec7 tr\u1ebb s\u1eafp gia nh\u1eadp ng\u00e0nh?<\/p>\n

    T\u00f4i cho r\u1eb1ng bu-l\u00f4ng neo t\u1ef1 khoan l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p thi c\u00f4ng \u0111i\u1ec3n h\u00ecnh.<\/p>\n

     <\/p>\n

    H\u1eb9n g\u1eb7p l\u1ea1i nh\u00e9.<\/p>","protected":false},"excerpt":{"rendered":"

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