{"id":8663,"date":"2018-12-05T11:00:49","date_gmt":"2018-12-05T02:00:49","guid":{"rendered":"https:\/\/norimen.net\/wordpress\/?p=8663"},"modified":"2026-05-17T14:44:02","modified_gmt":"2026-05-17T05:44:02","slug":"anchor-underground-water-sand-blowup-2","status":"publish","type":"post","link":"https:\/\/norimen.net\/en\/anchor-underground-water-sand-blowup-2\/","title":{"rendered":"Measures to Prevent Sand Ejection Caused by Groundwater Pressure in Anchor Construction (Part 2)"},"content":{"rendered":"

Hello, everyone.<\/p>\n

This is Enta.<\/p>\n

All the construction projects I'm working on have been pushed back, and there's nothing I can do about it lol<\/p>\n

The general contractor doesn't seem to care if they're late\u2014they just say, \"We'll start on this day,\" and so on...<\/p>\n

That's impossible, right? lol<\/p>\n

I bet there are plenty of construction companies that think that way, lol.<\/p>\n

Let's take it slow and be careful!<\/p>\n

\n

But that's beside the point.<\/p>\n

So, which approaches work and which ones don't?<\/p>\n

I'll be writing about my failures and successes in a series of posts!<\/p>\n

\"\"<\/p>\n

Since this is work, it\u2019s important to get the job done as quickly as possible.<\/p>\n

However, it\u2019s important to have a solid understanding of that process because it will help you in the future.<\/p>\n

After all, nobody makes mistakes, lol.<\/p>\n

 <\/p>\n

As mentioned last time, the actual cross-section of the drilled hole looks like the one shown below.\"Drill<\/p>\n

It is 15 meters long, with a fixed length of 9 meters.<\/p>\n

River gravel and sand tend to clump together and cause jamming, so this area needs to be thoroughly cleaned.<\/p>\n

\"Borehole<\/p>\n

So, the part where I messed up here was the pump!<\/p>\n

At first, I was a little overconfident and brought along an MG-5 pump made by Koken Kogyo.<\/p>\n

Koken Kogyo Co., Ltd.<\/a><\/span><\/span><\/strong><\/span><\/p>\n

There just isn't nearly enough water, so I can't clean it.<\/p>\n

I brought a compressor, too, but that one\u2019s also 50 horsepower.<\/p>\n

I came to the conclusion that this method wouldn't let me level up the slime fully.<\/p>\n

So, for now...Upgraded from MG-5 to MG-10!<\/span><\/strong><\/span><\/p>\n

 <\/p>\n

I'm getting way more slime now!!<\/p>\n

The river gravel keeps piling up!<\/p>\n

Also, since there was a lot of water, I was able to drill the hole while pushing the sand aside to some extent.<\/p>\n

Unlike mountains, sand and clay layers really require a certain amount of water and pressure, don't they!<\/p>\n

I suppose I should really upgrade the compressor to 100 horsepower, but I'll have to make do with 50 horsepower this time!<\/p>\n

 <\/p>\n

I suppose this is just common sense to the craftsmen who have been doing this work all along, but,<\/p>\n

You only learn things like this through experience, don't you? Veteran craftsmen don't go out of their way to teach you every little thing, after all.<\/p>\n

I'm just going ahead and handling this on my own, aren't I? lol<\/p>\n

You can't rely on unspoken understandings. You have to clearly state things in writing and keep a record.<\/p>\n

By doing that, you can use it to your advantage for future success!<\/p>\n

 <\/p>\n

That said, water alone hasn't solved a single thing at this site, lol.<\/p>\n

 <\/p>\n

See you later.<\/p>","protected":false},"excerpt":{"rendered":"

Hello, everyone. This is Enta. All the construction projects I\u2019m working on are getting pushed back, and there\u2019s just nothing I can do about it lol. The general contractor doesn\u2019t seem to care about the delays and just says, \u201cYou have to start on this date,\u201d even though we\u2019re behind schedule\u2026 That\u2019s impossible, right? lol. I\u2019m sure there are plenty of other construction companies thinking the same thing lol. Let\u2019s be careful and take our time\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":[48,1090,1807,1919,1920,1921,1922,1923,1924,1925],"class_list":["post-8663","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ground-anchor","tag-48","tag-1090","tag-1807","tag-1919","tag-1920","tag-1921","tag-1922","tag-1923","tag-mg-10","tag-mg-5"],"acf":[],"yoast_head":"\n\u30a2\u30f3\u30ab\u30fc\u5de5\u306b\u304a\u3051\u308b\u5730\u4e0b\u6c34\u5727\u306b\u3088\u308b\u7802\u306e\u5439\u304d\u4e0a\u3052\u5bfe\u7b56\uff08\u305d\u306e2\uff09 - 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