{"id":49516,"date":"2023-08-02T08:00:11","date_gmt":"2023-08-01T23:00:11","guid":{"rendered":"https:\/\/norimen.net\/wordpress\/?p=49516"},"modified":"2026-05-16T14:01:22","modified_gmt":"2026-05-16T05:01:22","slug":"ground-anchor-tension-management","status":"publish","type":"post","link":"https:\/\/norimen.net\/en\/ground-anchor-tension-management\/","title":{"rendered":"Is tension control in ground anchor construction really pointless after all!?"},"content":{"rendered":"

Hello, everyone.<\/p>\n

This is Enta.<\/p>\n

The other day, I came across an interesting post on Mr. Ota\u2019s blog at Ota Geo.<\/p>\n

Little by Little 2<\/a><\/p>\n

Anchor tests cannot guarantee the performance of the anchorage<\/a>
\nAs for the content of the article, grout will be injected into the anchorage section and the free-length section, so<\/p>\n

Quality assurance testing (multi-cycle testing) does not yield reliable data.<\/p>\n

That's what he's saying.<\/p>\n

\"Ground<\/p>\n

That's true in real life, isn't it?<\/p>\n

That is why the test results tend to be on the lower end. (There is more friction than expected.)<\/p>\n

The grout in the anchored section and the grout in the free-span section are connected using the same material.<\/p>\n

The anchor itself is connected to the grout only at the anchorage point, but,<\/p>\n

All sections subject to circumferential friction are connected to the free-length sections.<\/p>\n

 <\/p>\n

As I've been saying for a while now, my interpretation is that as long as it passes the quality assurance testing, it's okay.<\/p>\n

As long as the ground anchors don't come loose, the installation was done correctly.<\/p>\n

To be honest, the test data doesn't really matter, does it? (Am I not supposed to say that?)<\/p>\n

Since it\u2019s been published in the professors\u2019 papers, I guess it\u2019s okay to say it publicly, lol.<\/p>\n

The Effect of Circumferential Friction on the Free Length of an Anchor on the Tension Force<\/a><\/p>\n

 <\/p>\n

I\u2019ve said this many times before, but to begin with, it\u2019s nonsense to take a 1\/100 exam outside, and,<\/p>\n

There's no way I'll ever get a perfect score lol<\/p>\n

The reliability of the data is a bit questionable, you see.<\/p>\n

 <\/p>\n

As long as there's grout in both the fixed section and the free section, it won't come out.<\/p>\n

Basically.<\/p>\n

There are some anchors that come loose from time to time, but,<\/p>\n

That means there is a problem with the approach to the attachment section.<\/p>\n

\"Assembled<\/p>\n

Ground anchor work is a type of construction where, even after working on it, there\u2019s still a lot we don\u2019t know\u2014it\u2019s full of mysteries, lol.<\/p>\n

If the free end is stiffer than expected, it will be difficult to remove.<\/p>\n

There's also the idea that if the free end is flexible, it's more likely to come loose.<\/p>\n

It's interesting to work in places you can't see (like digging holes), isn't it?<\/p>\n

This has given me yet another thing to think about.<\/p>\n

 <\/p>\n

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

Hello, everyone. This is Enta. The other day, I came across an interesting post on Mr. Ota\u2019s blog at Ota Geo. \u201cBit by Bit 2: Anchor Tests Cannot Guarantee the Performance of the Anchored Section.\u201d The gist of the article is that since grout is injected into both the anchored section and the free length, quality assurance tests (multi-cycle tests) are\u2026<\/p>","protected":false},"author":2,"featured_media":41087,"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":[48,1000,1108,2096],"class_list":["post-49516","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ground-anchor","tag-48","tag-1000","tag-1108","tag-2096"],"acf":[],"yoast_head":"\n\u30b0\u30e9\u30a6\u30f3\u30c9\u30a2\u30f3\u30ab\u30fc\u5de5\u306b\u304a\u3051\u308b\u7dca\u5f35\u7ba1\u7406\u306f\u3084\u306f\u308a\u610f\u5473\u306e\u306a\u3044\u7ba1\u7406\u306a\u306e\u304b\uff01\uff1f - 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