{"id":56806,"date":"2025-11-05T08:00:47","date_gmt":"2025-11-04T23:00:47","guid":{"rendered":"https:\/\/norimen.net\/?p=56806"},"modified":"2026-05-16T17:54:00","modified_gmt":"2026-05-16T08:54:00","slug":"ground-anchor-tau-test-5-material","status":"publish","type":"post","link":"https:\/\/norimen.net\/en\/ground-anchor-tau-test-5-material\/","title":{"rendered":"Basic Tests for Measuring Circumferential Friction Resistance (\u03c4) in Ground Anchor Construction (Part 5): Materials"},"content":{"rendered":"<p>Hello, everyone.<\/p>\n<p>This is Enta.<\/p>\n<p>I wanted to explain the documents for the basic exam first, but,<\/p>\n<p>Due to my own circumstances (I've got a lot on my plate), I think I'll start with the installation lol<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-48022\" src=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2022\/11\/686c1cce0cc72c83c95022cb549c4221.jpg\" alt=\"Basic Exam\" width=\"600\" height=\"400\" \/><\/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><a title=\"Basic Tests for Measuring Peripheral Friction Resistance (\u03c4) in Ground Anchor Construction (Part 2): Bearing Capacity\" href=\"https:\/\/norimen.net\/en\/ground-anchor-tau-test-2\/\" target=\"_blank\" rel=\"noopener\">Basic Tests for Measuring Peripheral Friction Resistance (\u03c4) in Ground Anchor Construction (Part 2): Bearing Capacity<\/a><\/p>\n<p><a title=\"Basic Tests for Measuring Circumferential Friction Resistance (\u03c4) in Ground Anchor Construction (Part 3): Soil Bearing Capacity\" href=\"https:\/\/norimen.net\/en\/ground-anchor-tau-test-3\/\" target=\"_blank\" rel=\"noopener\">Basic Tests for Measuring Circumferential Friction Resistance (\u03c4) in Ground Anchor Construction (Part 3): Soil Bearing Capacity<\/a><\/p>\n<p><a href=\"https:\/\/norimen.net\/en\/ground-anchor-tau-test-4\/\" target=\"_blank\" rel=\"noopener\">Basic Tests for Measuring Circumferential Friction Resistance (\u03c4) in Ground Anchor Construction (Part 4): Soil Bearing Capacity<\/a><\/p>\n<h2>Preparing the Anchor Body<\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-56821\" src=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2025\/10\/2025-10-30-15.02.58.jpg\" alt=\"\" width=\"600\" height=\"450\" \/><\/p>\n<p>In this test, we will conduct verification tests using SE's table anchor.<\/p>\n<p>We'll be using Fujiwara Sangyo's rubber tube packers.<\/p>\n<p>I believe Fujiwara Industries is probably the only company in the industry that sells these materials.<\/p>\n<p>&nbsp;<\/p>\n<p><a href=\"https:\/\/fujiwarasangyo.jp\/e02\/#nuno\" target=\"_blank\" rel=\"noopener\">Fujiwara Industries Tube Rubber Packer<\/a><\/p>\n<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-56825\" src=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2025\/10\/c473578cdba11499d198cd9682dc11c1.png\" alt=\"Basic Exam Materials\" width=\"600\" height=\"460\" \/><\/p>\n<p>The basic structure looks something like this.<\/p>\n<p>This is the same regardless of which anchor you use.<\/p>\n<p>&nbsp;<\/p>\n<p>The reason for using a rubber tube packer is to separate the cement slurry in the free length from that in the set section, and<\/p>\n<p>This is to rinse the cement slurry from the free-length section and remove friction.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-56817\" src=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2025\/10\/2025-10-30-15.06.22.jpg\" alt=\"Rubber Tube Packing\" width=\"600\" height=\"450\" \/><\/p>\n<p>Since the embedment length is 1,500 mm this time, set the rubber tube packer up to the 1,500 mm mark.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-56819\" src=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2025\/10\/2025-10-30-15.04.30.jpg\" alt=\"Rubber Tube Packing\" width=\"600\" height=\"450\" \/><\/p>\n<p>We will ensure that the 1,500 mm is securely fastened.<\/p>\n<p>Please don't try to make it a little more or a little less.<\/p>\n<p>Since you're taking the exam anyway, you should study thoroughly to some extent.<\/p>\n<p>After all, you want the most accurate data possible, don't you?<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-56818\" src=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2025\/10\/2025-10-30-15.04.34.jpg\" alt=\"Rubber Tube Packing\" width=\"600\" height=\"450\" \/><\/p>\n<p>Since there's some overlap for the tape, I'll leave about 2 cm.<\/p>\n<p>I'll start wrapping the tape from here.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-56816\" src=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2025\/10\/2025-10-30-15.10.29.jpg\" alt=\"Rubber Tube Packing\" width=\"600\" height=\"450\" \/><\/p>\n<h4>Packer's Tips<\/h4>\n<p>While pulling it taut with a wide piece of tape,<span style=\"font-size: 20px; color: #ff0000;\"><strong>\u203b<\/strong><\/span><span style=\"color: #ff0000;\"><strong>As small as possible<\/strong><\/span>Wrap it around it!<\/p>\n<p>Making this packer as small as possible will make it easier to insert into the casing.<\/p>\n<p>Here's the key point.<\/p>\n<p>Anyway, just wrap it tightly while pressing down firmly with the tape.<\/p>\n<p>&nbsp;<\/p>\n<p>If you wrap it this tightly, the packer won't inflate, will it!?<\/p>\n<p>Some people might think that.<\/p>\n<p>But don't worry\u2014it actually inflates very easily.<\/p>\n<p>The recommended inflation pressure for the rubber tube packer is 0.2 MPa.<\/p>\n<p>Since 0.2 MPa exerts a force of 2 kgf per 1 mm\u00b2, that\u2019s an incredible amount of force.<\/p>\n<p>It tears right through vinyl tape!<\/p>\n<div class=\"jetpack-video-wrapper\"><iframe loading=\"lazy\" title=\"Rubber Tube Packing\" width=\"640\" height=\"360\" src=\"https:\/\/www.youtube.com\/embed\/AdVY7w-uZ2Y?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/div>\n<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-56820\" src=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2025\/10\/2025-10-30-15.03.08.jpg\" alt=\"Rubber Tube Packing\" width=\"600\" height=\"450\" \/><\/p>\n<p>After securely wrapping the packer, attach the injection hose.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-56814\" src=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2025\/10\/2025-10-30-15.19.58.jpg\" alt=\"Rubber Tube Packing\" width=\"600\" height=\"450\" \/><\/p>\n<h4>Key Points for Injection Hoses<\/h4>\n<p>Since the tip of the injection hose is sticking out of the packer, push the hose firmly into it at least 1 cm!<\/p>\n<p>Key Point!<\/p>\n<p>This is<strong><span style=\"font-size: 20px; color: #ff0000;\">\u203b<\/span><span style=\"color: #ff0000;\">Make sure to push it in firmly and check that it doesn't come out.<\/span><\/strong>Please do so.<\/p>\n<p>If I mess up here, it's all over! lol<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-56813\" src=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2025\/10\/2025-10-30-15.20.22.jpg\" alt=\"Rubber Tube Packing\" width=\"600\" height=\"450\" \/><\/p>\n<p>After pushing it in, secure this part firmly with vinyl tape so it doesn't come loose.<\/p>\n<p>Then secure everything in place with steel wire.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-56815\" src=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2025\/10\/2025-10-30-15.19.15.jpg\" alt=\"Rubber Tube Packing\" width=\"600\" height=\"450\" \/><\/p>\n<p>We'll create it while checking and verifying at key points along the way.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-56811\" src=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2025\/10\/2025-10-30-15.33.31.jpg\" alt=\"Rubber Tube Packing\" width=\"600\" height=\"450\" \/><\/p>\n<p>Next, attach the hose for rinsing the free-length section.<\/p>\n<p>Install the hose taking into account the anchor's diameter, the casing's inner diameter, and other factors.<\/p>\n<p>If it doesn't fit, it's fine to remove all the casings before cleaning.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-56823\" src=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2025\/10\/2025-10-30-15.33.43.jpg\" alt=\"Water Packer\" width=\"600\" height=\"450\" \/><\/p>\n<p>Drilling holes in certain areas allows for more efficient cleaning.<\/p>\n<p>&nbsp;<\/p>\n<p>Now the anchor body is ready.<\/p>\n<p>&nbsp;<\/p>\n<p>The method varies slightly depending on the type of anchor, but 90% of them are essentially the same.<\/p>\n<p>To put it another way, SE's testing using table anchors might be a bit unusual.<\/p>\n<p>&nbsp;<\/p>\n<p>Well, it's not that big of a deal, so please give it a try.<\/p>\n<p>Next time, we'll cover the installation process.<\/p>\n<p>&nbsp;<\/p>\n<p>See you later.<\/p>","protected":false},"excerpt":{"rendered":"<p>Hello, everyone. This is Enta. I had intended to explain the basic test documentation first, but due to my schedule (I\u2019m swamped with various things), I think I\u2019ll start with the construction process instead lol. Basic Test (Part 1) for Measuring Circumferential Friction Resistance (\u03c4) in Ground Anchor Construction. In ground anchor construction\u2026<\/p>","protected":false},"author":2,"featured_media":55729,"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":[28,30],"tags":[48,439,743,7061],"class_list":["post-56806","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ground-anchor","category-lock-bolt","tag-48","tag-439","tag-743","tag-7061"],"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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