![\"Drilling](\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2019\/03\/2019-03-06-09.35.01-600x450.jpg\")
<\/p>\n
The machine is designed with a 5-degree upward angle, but when the coasting distance exceeds 5 meters, the front end definitely drops.<\/p>\n
This time it was about 10 meters long, but when I measured it at the tip, it was practically \u00b10 degrees.<\/p>\n
So, to ensure the angle is just right, we have them wear geta.<\/p>\n
![\"Drainage](\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2019\/03\/2019-03-06-09.34.45-600x450.jpg\")
<\/p>\n
First, use your hand to tilt the tip of the casing upward by 5 degrees. (It\u2019s a little heavy, lol.)<\/p>\n
Next, determine the approximate location and place single pipes or similar supports under the casing to ensure it remains at a -5-degree angle.<\/p>\n
Align the tip, mid-section, and machine side of the casing to -5 degrees, and begin drilling.<\/p>\n
<\/p>\n
Once the casing is driven into the rock, it won't sink much further, but<\/p>\n
You need to be careful because the pressure can sometimes rise instead, but even if you drill carefully, if you hit a rock or something,<\/p>\n
It goes up and down.
\n(You can check this with a gyro sensor, but isn't the precision required for dewatering drilling not that high?)<\/p>\n
Installing this single pipe will ensure compliance with the standards, so I believe it will serve as a precaution in case any issues are raised during the final inspection.<\/p>\n
<\/p>\n
As for drilling, they really put me through the wringer on this mountain lol.<\/p>\n
The drilling length was 45 meters, but the last 15 meters were sandstone, and the drill bit wouldn\u2019t rotate unless the hydraulic pressure was set to \u201cLow.\u201d<\/p>\n
Removing the tube was also a real challenge; it took a long time as I had to hammer away at it relentlessly at low speed.<\/p>\n
Well, since the rotation wasn't at its maximum, I had some leeway, but mountains are scary, aren't they? lol<\/p>\n
<\/p>\n
Starting this week, I'll be working as an anchor in Nagano!<\/p>\n
See you later.<\/p>","protected":false},"excerpt":{"rendered":"
Hello, everyone. This is Enta. I met a supervisor who was new to dewatering drilling the other day. He asked me all sorts of detailed questions about things he was curious about, and I answered them, but I could tell he still didn\u2019t quite get it. So I told him, \u201cYou\u2019ll understand once we actually start the work!\u201d But here are some photos from before that\u2026<\/p>","protected":false},"author":2,"featured_media":5596,"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":[90],"tags":[91,181,2214],"class_list":["post-38585","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-drain-boring","tag-91","tag-181","tag-2214"],"acf":[],"yoast_head":"\n