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<\/p>\nHello, everyone.<\/p>\n
This is Enta.<\/p>\n
The other day, something really awful happened!<\/p>\n
Well, it\u2019s been a while since I\u2019ve been this angry\u2014or whatever you want to call it...<\/p>\n
I don't usually get that angry, but the other day I was just so mad!!!<\/p>\n
So, I vented to my bosses about it. lol<\/p>\n
Thanks to that, I feel much better now.<\/p>\n
Thank you!<\/span><\/strong><\/span><\/p>\n But that's beside the point.<\/p>\n <\/p>\n As I mentioned the other day, regarding stress management in ground anchor construction,Can compress or shorten time<\/span><\/strong>I wrote that.<\/p>\n So, since I was asked where that is written and how it should be interpreted, I will answer those questions.<\/p>\n Design and Construction Standards for Ground Anchors and Explanatory Notes JGS4101-2012<\/span><\/strong><\/span>\u3000I'll base my writing on this.<\/p>\n P181<\/p>\n 2) Loading Methods and Measurement Items<\/p>\n It states that the retention period can be changed at the discretion of the person in charge.<\/p>\n However, this assumes that the creep and relaxation values are stable.<\/p>\n So, this \"stability\" refers to...<\/p>\n It is often considered stable when the displacement during the final 3 minutes of the hold time is 1 mm or less.<\/span><\/strong><\/span><\/p>\n Since it says that, I think you should aim for about 1 mm every 3 minutes.<\/p>\n Another important point here is that,Please note that this load-holding time is only a guideline.<\/span><\/strong><\/span>That's it.<\/p>\n It definitely doesn't have to be at this exact time.<\/p>\n Guideline<\/span><\/strong><\/span>It is a possibility, but not an absolute certainty.<\/p>\n Even though the situation is stable on site, there are often people who keep holding it for 60 minutes or so.<\/p>\n I'm not saying it's bad, but,A waste of time<\/span><\/strong><\/span>That's it.<\/p>\n Once it has stabilized, the data will not change.<\/p>\n Next, the aptitude test starting on page 188<\/p>\n The aptitude test follows the format of the basic survey test, and the confirmation test follows the format of the aptitude test.<\/p>\n This table on page 189 alsoGuideline<\/span><\/strong><\/span>That's it.<\/p>\n And there\u2019s something important written here, but,<\/p>\n Rank A: Design anchor force (Td) \u00d7 1.25 Since this is the maximum score on the aptitude test, as long as you don't exceed it, there's no problem.<\/p>\n I base my decision on the condition of the mountain and the drilling conditions, but at most sites, I use a factor of 1.20.<\/p>\n The reason is this: Is it really necessary to pull with a force greater than the anchoring load\u2014a force that won\u2019t cause the anchor to come out?<\/p>\n Determining that the construction is proper means that if the design loads can be applied, the construction can be deemed proper.<\/p>\n In reality, there is such a thing as seismic loading, so it\u2019s important that the fasteners don\u2019t come loose even when subjected to large, temporary (instantaneous) loads, so<\/p>\n Taking that into account, we use 1.2 times as a general guideline.<\/p>\n It is also permitted for the person in charge to set a lower limit in this area at their discretion. (p. 190)<\/p>\n As for the loading time, as a rough rule of thumb, for anchors between 10 and 20 meters in length, about half of the above guideline is sufficient. (Based on my personal experience.)<\/p>\n For anchors longer than 30 meters, I think even the recommended holding time should be sufficient.<\/p>\n As long as creep and relaxation aren't stable, you can simply keep extending the time.<\/p>\n I wonder if it makes more sense to set the maximum time to about 30 minutes and allow for extensions? (It sounds a lot like a hostess club, lol.)<\/p>\n So, that was the reason\u2014to save time.<\/p>\n Strictly speaking,The fundamental premise is that this must be done under the direction of a certified ground anchor installer.<\/span><\/strong><\/span>That's it!<\/p>\n Another way to physically shorten the process is to use two jacks. (This really cuts down on the tension time. Haha.)<\/p>\n <\/p>\n See you later.<\/p>","protected":false},"excerpt":{"rendered":" Hello, everyone. It\u2019s Enta here. The other day, something really annoying happened! Well, it\u2019s been a while since I\u2019ve been this angry\u2014or whatever you want to call it\u2026 I don\u2019t usually get that worked up, but the other day I was just so mad!!! So I vented to my bosses. Haha. Thanks to that, I feel a lot better\u2026<\/p>","protected":false},"author":2,"featured_media":4876,"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":[48,440,612,824,825,826],"class_list":["post-4868","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ground-anchor","tag-48","tag-440","tag-612","tag-824","tag-825","tag-826"],"acf":[],"yoast_head":"\n
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\n<\/span><\/strong><\/span>Rank B: Design anchor force (Td) \u00d7 1.10<\/span><\/strong><\/span><\/p>\n![\"\"](\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2017\/10\/977477dd19d73d5e0fc2764ebb7a3ff9.jpg\")
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