{"id":42152,"date":"2020-07-01T08:00:31","date_gmt":"2020-06-30T23:00:31","guid":{"rendered":"https:\/\/norimen.net\/wordpress\/?p=42152"},"modified":"2026-05-17T06:34:38","modified_gmt":"2026-05-16T21:34:38","slug":"high-pressure-drilling-part-3","status":"publish","type":"post","link":"https:\/\/norimen.net\/en\/high-pressure-drilling-part3\/","title":{"rendered":"Drilling in High-Pressure Water (Part 3) | Field Test"},"content":{"rendered":"<p>Hello, everyone.<\/p>\n<p>This is Enta.<\/p>\n<p>This is a continuation of the previous post.<\/p>\n<p>&nbsp;<\/p>\n<p>After drilling with a crown bit, cement slurry is injected.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-42153 alignnone\" src=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2020\/06\/1dd3bf70187368712e339da968098660.png\" alt=\"Drilling with a crown bit\" width=\"600\" height=\"460\" srcset=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2020\/06\/1dd3bf70187368712e339da968098660.png 600w, https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2020\/06\/1dd3bf70187368712e339da968098660-300x230.png 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/p>\n<p>Basically, in outer drilling, the slurry is discharged through the outer casing.<\/p>\n<p>And when the water pressure is high, it's surprisingly hard to tell if it's slime or water, lol.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-42154 alignnone\" src=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2020\/06\/7ab942f3c3b118e23a2d0fdb9c91232c.png\" alt=\"Drilling and Injection Using a Crown Bit\" width=\"600\" height=\"460\" srcset=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2020\/06\/7ab942f3c3b118e23a2d0fdb9c91232c.png 600w, https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2020\/06\/7ab942f3c3b118e23a2d0fdb9c91232c-300x230.png 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/p>\n<p>After drilling is complete, insert the injection pipe to the very bottom and perform water displacement injection.<\/p>\n<p>Alternatively, it is also acceptable to cement the borehole using cement slurry for the section beyond the anchorage point without performing replacement grouting.<\/p>\n<p>&nbsp;<\/p>\n<p>Ideally, once the interior of the casing has been replaced with cement slurry, the slurry should be forced into the sand at the anchorage point while being discharged from the tip of the crown bit.<\/p>\n<p>(Connect the cement slurry injection hose to the machine's water line and dispense the cement slurry while rotating the casing.)<\/p>\n<p>One thing I\u2019d like you to be careful about here is,<span style=\"font-size: 150%;\"><strong><span style=\"color: #ff0000;\">Never pull back the casing<\/span><\/strong><\/span>That's it!<\/p>\n<p>Since the crown bit comes off easily, there's a high chance it will come loose if you pull on it.<\/p>\n<p>Please be careful\u2014it's hard to catch the ball if you just push it or spin it in place!<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-42155 alignnone\" src=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2020\/06\/680ddec0e6e23f8babeab7e072b93732.png\" alt=\"Injection by Kronenbit\" width=\"600\" height=\"460\" srcset=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2020\/06\/680ddec0e6e23f8babeab7e072b93732.png 600w, https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2020\/06\/680ddec0e6e23f8babeab7e072b93732-300x230.png 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/p>\n<p>By squeezing out the cement slurry and spreading it around, it seeps into the surrounding area and helps make it just a little more resistant to crumbling. (Fingers crossed)<\/p>\n<p>You\u2019d want to make the pore walls as self-supporting as possible and form a stabilized structure, right? (Well, since you can\u2019t see it, it\u2019s hard to say for sure, lol.)<\/p>\n<p>&nbsp;<\/p>\n<p>However, given that the confined water pressure is high, it is entirely possible that cement slurry may also be injected in some cases.<\/p>\n<p>That's up to the people on the ground to decide.<\/p>\n<p>Next, we'll be inserting the anchor bodies, but I'll cover that another day.<\/p>\n<p>&nbsp;<\/p>\n<p>See you later.<\/p>\n<p>For inquiries regarding Kronenbit, please contact Fujiwara Industries.<\/p>\n<div class=\"linkcard\"><div class=\"lkc-external-wrap\"><a class=\"lkc-link no_icon\" href=\"https:\/\/fujiwarasangyo.jp\" data-lkc-id=\"131\" target=\"_blank\" rel=\"external noopener\"><div class=\"lkc-card\"><div class=\"lkc-info\"><div class=\"lkc-favicon\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.google.com\/s2\/favicons?domain=fujiwarasangyo.jp\" alt=\"\" width=\"16\" height=\"16\" \/><\/div><div class=\"lkc-domain\">fujiwarasangyo.jp<\/div><\/div><div class=\"lkc-content\"><figure class=\"lkc-thumbnail\"><img decoding=\"async\" class=\"lkc-thumbnail-img\" src=\"https:\/\/s.wordpress.com\/mshots\/v1\/https%3A%2F%2Ffujiwarasangyo.jp?w=100\" width=\"100px\" height=\"108px\" alt=\"\" \/><\/figure><div class=\"lkc-title\">FSC Fujiwara Industries Co., Ltd. | Fujiwara Industries specializes in tensioning systems such as ground anchors and rock bolts...<\/div><div class=\"lkc-url\" title=\"https:\/\/fujiwarasangyo.jp\">https:\/\/fujiwarasangyo.jp<\/div><div class=\"lkc-excerpt\">Fujiwara Industries primarily designs, sells, and rents tension jacks, measuring instruments, and related components for ground anchors, rock bolts, and other applications.<\/div><\/div><div class=\"clear\"><\/div><\/div><\/a><\/div><\/div>\n<p><a title=\"Drilling in High-Pressure Water (Part 1)\" href=\"https:\/\/norimen.net\/en\/high-pressure-drilling-part-1\/\" target=\"_blank\" rel=\"noopener\">Drilling in High-Pressure Water (Part 1)<\/a><\/p>\n<p><a title=\"Drilling in High-Pressure Water (Part 2)\" href=\"https:\/\/norimen.net\/en\/high-pressure-drilling-part-2\/\" target=\"_blank\" rel=\"noopener\">Drilling in High-Pressure Water (Part 2)<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Hello, everyone. This is Enta. This is a continuation of my previous post.   After drilling with a crown bit, cement slurry is injected. Basically, when drilling the outer hole, the slurry is expelled outside the outer casing. And when the water pressure is high, it\u2019s surprisingly difficult to tell whether it\u2019s slurry or water\u2026<\/p>","protected":false},"author":2,"featured_media":8660,"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":[28],"tags":[48,92,159,1399,3501,3541,3573,3581,3584],"class_list":["post-42152","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ground-anchor","tag-48","tag-92","tag-159","tag-1399","tag-3501","tag-3541","tag-3573","tag-3581","tag-3584"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.2 (Yoast SEO v28.2) - 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