{"id":55728,"date":"2025-09-13T23:00:35","date_gmt":"2025-09-13T14:00:35","guid":{"rendered":"https:\/\/norimen.net\/wordpress\/%e3%82%b0%e3%83%a9%e3%82%a6%e3%83%b3%e3%83%89%e3%82%a2%e3%83%b3%e3%82%ab%e3%83%bc%e5%b7%a5%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8b%e5%91%a8%e9%9d%a2%e6%91%a9%e6%93%a6%e6%8a%b5%e6%8a%97%ef%bc%88%cf%84-2\/"},"modified":"2026-05-16T17:04:50","modified_gmt":"2026-05-16T08:04:50","slug":"ground-anchor-tau-test-2","status":"publish","type":"post","link":"https:\/\/norimen.net\/en\/ground-anchor-tau-test-2\/","title":{"rendered":"Basic Tests for Measuring Peripheral Friction Resistance (\u03c4) in Ground Anchor Construction (Part 2): Bearing Capacity"},"content":{"rendered":"<p>Hello, everyone.<\/p>\n<p>This is Enta.<\/p>\n<p><a title=\"Basic Tests for Measuring Circumferential Friction Resistance (\u03c4) in Ground Anchor Construction (Part 1)\" href=\"https:\/\/norimen.net\/en\/ground-anchor-tau-test-1\/\" target=\"_blank\" rel=\"noopener\">Basic Tests for Measuring Circumferential Friction Resistance (\u03c4) in Ground Anchor Construction (Part 1)<\/a><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-55443\" src=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2025\/09\/e5a8784d2931b719de10e2276c1a6298-1.jpg\" alt=\"Circumferential Friction Resistance\" width=\"500\" height=\"500\" \/><\/p>\n<p>I was working on a simple calculation sheet for circumferential friction, but due to various circumstances, I wasn't able to finish it in time, so,<\/p>\n<p>In this post, I\u2019d like to write about soil bearing capacity and compression plates.<\/p>\n<p>&nbsp;<\/p>\n<p>There is an item called \"ground bearing capacity\" in the design calculations.<\/p>\n<p>This is<span style=\"font-size: 130%; color: #0000ff;\"><strong>The maximum load that the ground can support without subsiding or failing<\/strong><\/span>That's it.<\/p>\n<p>&nbsp;<\/p>\n<p>This is a condition in which, even when a constant load is applied from above, there is no differential settlement and the surrounding area does not bulge upward.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-7893\" src=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2018\/08\/2017-10-30-11.22.25.jpg\" alt=\"Pressure Plate Sinks\" width=\"600\" height=\"450\" srcset=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2018\/08\/2017-10-30-11.22.25.jpg 600w, https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2018\/08\/2017-10-30-11.22.25-300x225.jpg 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/p>\n<p>This pressure-receiving plate is raised all around its perimeter.<\/p>\n<p>The bearing capacity of the soil is completely insufficient.<\/p>\n<p>&nbsp;<\/p>\n<p>In the field, when the natural ground collapses or deforms due to tensile stress, this is referred to as the ground having insufficient bearing capacity.<\/p>\n<p>What should we do as a countermeasure in this situation?<\/p>\n<p>&nbsp;<\/p>\n<p>The simplest solution is to replace the pressure plate with a larger one.<\/p>\n<p>It's a simple concept\u2014whether you press with the same amount of force using your fingertip or your palm\u2014but I'm going to try to explain it in a slightly more complicated way lol.<\/p>\n<p>&nbsp;<\/p>\n<p>For example,<\/p>\n<p><span style=\"font-size: 130%;\"><strong><span style=\"color: #ff0000;\">Let's assume that the bearing capacity of the soil at this site is 100 kN\/m\u00b2.<\/span><\/strong><\/span><\/p>\n<p><span style=\"font-size: 130%;\"><strong><span style=\"color: #ff0000;\">Let the tensile force be 450 kN.<\/span><\/strong><\/span><\/p>\n<p><span style=\"font-size: 130%;\"><strong><span style=\"color: #ff0000;\">Let the area of the load-bearing plate be 2 m \u00d7 2 m = 4 m\u00b2.<\/span><\/strong><\/span><\/p>\n<p>&nbsp;<\/p>\n<p>450 kN \u00f7 4 m\u00b2 = 112.5 kN\/m\u00b2<\/p>\n<p>This is the load applied to the pressure plate.<\/p>\n<p>&nbsp;<\/p>\n<p>And since the soil bearing capacity is 100 kN\/m\u00b2,<\/p>\n<p><span style=\"font-size: 150%;\"><strong><span style=\"color: #0000ff;\">100 kN\/m\u00b2 &lt; 112.5 kN\/m\u00b2<\/span><\/strong><\/span><\/p>\n<p>So that means the natural ground is losing, right?<\/p>\n<p>&nbsp;<\/p>\n<p>It's sinking deeper and deeper into the ground lol<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-55461\" src=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2025\/09\/e185938cb9f37f89088e1ca78692eeef-1.jpg\" alt=\"Soil Bearing Capacity\" width=\"500\" height=\"500\" \/><\/p>\n<p>So, what should we do in this situation? (Keep in mind that this is strictly for the design phase; on-site, different measures would be taken.)<\/p>\n<p>&nbsp;<\/p>\n<p>Let's try making the pressure plate larger.<\/p>\n<p>For a load-bearing plate measuring 2.1 m \u00d7 2.1 m, the area is 4.41 m\u00b2.<\/p>\n<p>450 kN \u00f7 4.41 m\u00b2 = 102 kN\/m\u00b2<\/p>\n<p>This one's a no-go, too.<\/p>\n<p>&nbsp;<\/p>\n<p>2.2 m \u00d7 2.2 m = 4.84 m\u00b2<\/p>\n<p>450 kN \u00f7 4.84 m\u00b2 =<strong><span style=\"color: #ff0000;\">93 kN\/m\u00b2<\/span><\/strong><\/p>\n<p>It fell below 100 kN\/m\u00b2!<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-55462\" src=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2025\/09\/4470dea87dd59cf5e5d7d769ed9c31fc-1.jpg\" alt=\"Soil Bearing Capacity\" width=\"500\" height=\"500\" \/><\/p>\n<p>*No matter how many times I tried, I kept ending up with a drawing where the ground bearing capacity was insufficient, so I\u2019ve given up.<\/p>\n<p>*AI still doesn't do what I tell it to, lol*<\/p>\n<p>*Since the ground bearing capacity is higher in this illustration, the ground bearing capacity wins!<\/p>\n<p>&nbsp;<\/p>\n<p>Although we can't set the pressure plate with this much precision, this is the general approach we take in our calculations.<\/p>\n<p>&nbsp;<\/p>\n<p>If you know this, even in situations like the one shown in the photo above where the ground doesn't have sufficient bearing capacity, you can still...!!!<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-4917\" src=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2017\/10\/63f91a7e5e928e64e110e1c56d41edb5.jpg\" alt=\"Load-bearing Plate, Ground Bearing Capacity\" width=\"600\" height=\"460\" srcset=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2017\/10\/63f91a7e5e928e64e110e1c56d41edb5.jpg 600w, https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2017\/10\/63f91a7e5e928e64e110e1c56d41edb5-300x230.jpg 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/p>\n<p>Even if it collapses like this, we might still be able to take countermeasures.<\/p>\n<p>This is one of those times when the load-bearing plates have already been ordered and delivered to the site, but the ground bearing capacity is totally messed up, lol.<\/p>\n<p>What do you do when it's obvious that the site's bearing capacity is in serious trouble?<\/p>\n<p>&nbsp;<\/p>\n<p>If we could perform a simple calculation of circumferential friction, we could discuss circumferential friction resistance, but,<\/p>\n<p>Keeping in mind the possibility that it might not work out, I think I'll try writing a \"The Site's Bearing Capacity Is Clearly a Disaster!\" edition next time lol<\/p>\n<p>Things have been hectic since last week...<\/p>\n<p>&nbsp;<\/p>\n<p>See you later.<\/p>\n<p>&nbsp;<\/p>\n<p><a title=\"Announcement Regarding the 2025 Relaunch of Shin-Enta\u2019s Slope Management Seminar \u2014 User Benefits and Future Outlook \u2014\" href=\"https:\/\/norimen.net\/en\/2025-norimen-blog-redesign\/\" target=\"_blank\" rel=\"noopener\">Announcement Regarding the 2025 Relaunch of Shin-Enta\u2019s Slope Management Seminar \u2014 User Benefits and Future Outlook \u2014<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Hello, everyone. This is Enta. Basic Tests for Measuring Peripheral Friction Resistance (\u03c4) in Ground Anchor Construction (Part 1) I was working on a simple calculation sheet for peripheral friction, but due to various circumstances, I wasn\u2019t able to finish it in time, so this time I thought I\u2019d write about soil bearing capacity and load-bearing plates\u2026<\/p>","protected":false},"author":2,"featured_media":55725,"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":[48,5146,6980,6981,6982],"class_list":["post-55728","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ground-anchor","tag-48","tag-5146","tag-6980","tag-6981","tag-6982"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.2 (Yoast SEO v28.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ 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