{"id":55752,"date":"2025-09-19T23:00:42","date_gmt":"2025-09-19T14:00:42","guid":{"rendered":"https:\/\/norimen.net\/wordpress\/%e6%b3%95%e9%9d%a2%e5%b1%8b%e3%81%af%e7%9f%a5%e3%81%a3%e3%81%a6%e3%81%84%e3%81%a6%e6%ac%b2%e3%81%97%e3%81%84%e3%80%81%e7%8f%be%e5%a0%b4%e3%81%a7%e3%82%88%e3%81%8f%e4%bd%bf%e3%81%86%e7%b2%98%e7%9d%80-2\/"},"modified":"2026-05-16T17:05:09","modified_gmt":"2026-05-16T08:05:09","slug":"cohesion-phi-2","status":"publish","type":"post","link":"https:\/\/norimen.net\/en\/cohesion-phi-2\/","title":{"rendered":"What Slope Engineers Should Know: A Discussion of Cohesion (c) and Angle of Internal Friction (\u03c6), Commonly Used on Construction Sites (Part 2)"},"content":{"rendered":"

Hello, everyone.<\/p>\n

This is Enta.<\/p>\n

This is a continuation of my previous post.<\/p>\n

What Slope Engineers Should Know: A Discussion of Cohesion (c) and Angle of Internal Friction (\u03c6), Commonly Used on Construction Sites (Part 1)<\/a><\/p>\n

\"Internal<\/p>\n

To be honest, I haven\u2019t actually taken all of these exams myself, but I\u2019ll write about them based on what I learned in school and my experiences in the exam room.<\/p>\n

So please don't assume I know everything, lol (just making excuses)<\/p>\n

With my limited knowledge, I\u2019d like to look into this again and explain it to you all as clearly as possible ^^<\/p>\n

That said, it\u2019s the kind of thing where \u201cit\u2019s fine if you just know it,\u201d so feel free to skip it... lol<\/p>\n

Types and Methods of Shear Strength Tests<\/h2>\n

Shear Test on a Single Plate<\/h3>\n

\"Shear<\/p>\n

The soil, sand, and other test specimens are placed in a container measuring 6 centimeters in diameter and 2 centimeters in height, and a vertical load is applied from above while the top of the container is moved at a constant speed.<\/p>\n

Record the relationship between horizontal displacement and shear stress, and the relationship between horizontal displacement and vertical displacement<\/p>\n

 <\/p>\n

Uniaxial Compression Test \u00b7 Triaxial Compression Test<\/h3>\n

\"Uniaxial<\/p>\n

Raise the lower platform at a constant rate and measure the shaft displacement as you go.<\/p>\n

Calculate shaft strain from shaft displacement; calculate shaft stress from shaft load<\/p>\n

\"Triaxial<\/p>\n

The triaxial test is a test in which the compression directions are increased to three.<\/p>\n

The procedure is the same, but the types of samples are different.<\/p>\n

For uniaxial testing, the material is clay or a material with greater cohesion than clay, allowing the specimen to stand on its own; for triaxial testing, the material is sand.<\/p>\n

Unconsolidated soil samples are tested using uniaxial compression tests.<\/p>\n

Behn Test<\/h3>\n

\"Behn<\/p>\n

I spin the Beyblade vigorously as I insert it into the ground.<\/p>\n

At that time, call for the goniometer and dynamometer at the top to take readings and record them.<\/p>\n

In-Situ Vane Shear Test Method JGS1411<\/a><\/p>\n

For more details, click \u2191\u2191\u2191\u2191\u2191\u2191\u2191\u2191\u2191<\/p>\n

\n

We measure the strength of the soil using the test method described above.<\/p>\n

 <\/p>\n

The values obtained here are C (C) and \u03c6 (phi).<\/p>\n

\"Clone<\/p>\n

If we express this figure as an equation,\u03c4 = C + \u03c3 tan \u03c6<\/span>\u3000This equation is called the Coulomb breakdown line.<\/p>\n

 <\/p>\n

Cohesion is the force that causes soil particles to stick together due to the water surrounding them; it increases as the proportion of fine particles in the soil increases.<\/p>\n

\u03c6 (phi) represents the property that prevents particles from sliding against one another (friction), which is called the angle of internal friction.<\/p>\n

Summarizing this \"adhesive force\" and \"angle of internal friction\"Soil Strength Constants<\/strong><\/span>It is called (doshitsuj\u014ds\u016b).<\/p>\n

This means that as the load increases, the surface becomes less prone to slippage; therefore, the deeper you go into the natural ground, the less likely slippage is to occur.<\/p>\n

 <\/p>\n

There are actually a lot of other complicated issues involved, but if you're curious, please look into them yourself lol.<\/p>\n

For now, I think it\u2019s good to know at least the basics.<\/p>\n

That's it for now, lol.<\/p>\n

 <\/p>\n

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

Hello, everyone. This is Enta. This is a continuation of my previous post. What Slope Engineers Should Know: A Discussion of Adhesion Coefficient c and Angle of Internal Friction \u03c6, Commonly Used on Construction Sites (Part 1) I haven\u2019t actually conducted every single test myself, but I\u2019m writing this based on what I learned in school and my experiences observing tests in the lab\u2026<\/p>","protected":false},"author":2,"featured_media":55746,"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":[34,38],"tags":[6985,6986,6987,6988,6989,6990,6991],"class_list":["post-55752","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-slope-work","category-construction-management","tag-6985","tag-6986","tag-6987","tag-6988","tag-6989","tag-6990","tag-c"],"acf":[],"yoast_head":"\n\u6cd5\u9762\u5c4b\u306f\u77e5\u3063\u3066\u3044\u3066\u6b32\u3057\u3044\u3001\u73fe\u5834\u3067\u3088\u304f\u4f7f\u3046\u7c98\u7740\u529b\uff43\u3068\u5185\u90e8\u6469\u64e6\u89d2\u03c6\u306e\u8a71\u3057\uff08\u305d\u306e2\uff09 - \u65b0\u30a8\u30f3\u30bf\u306e\u6cd5\u9762\u7ba1\u7406\u587e<\/title>\n<meta name=\"description\" content=\"\u6cd5\u9762\u5c4b\u306b\u77e5\u3063\u3066\u3044\u3066\u6b32\u3057\u3044\u7c98\u7740\u529bc\u3068\u5185\u90e8\u6469\u64e6\u89d2\u03c6\u306e\u8a71\u30b7\u30ea\u30fc\u30ba\u305d\u306e2\u3002\u6cd5\u9762\u5de5\u4e8b\u306e\u73fe\u5834\u3067\u6d3b\u304b\u305b\u308b\u571f\u8cea\u529b\u5b66\u3092\u6cd5\u9762\u5c4b\u304c\u89e3\u8aac\u3057\u307e\u3059\u3002\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/norimen.net\/en\/cohesion-phi-2\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u6cd5\u9762\u5c4b\u306f\u77e5\u3063\u3066\u3044\u3066\u6b32\u3057\u3044\u3001\u73fe\u5834\u3067\u3088\u304f\u4f7f\u3046\u7c98\u7740\u529b\uff43\u3068\u5185\u90e8\u6469\u64e6\u89d2\u03c6\u306e\u8a71\u3057\uff08\u305d\u306e2\uff09\" \/>\n<meta property=\"og:description\" content=\"\u6cd5\u9762\u5c4b\u306b\u77e5\u3063\u3066\u3044\u3066\u6b32\u3057\u3044\u7c98\u7740\u529bc\u3068\u5185\u90e8\u6469\u64e6\u89d2\u03c6\u306e\u8a71\u30b7\u30ea\u30fc\u30ba\u305d\u306e2\u3002\u6cd5\u9762\u5de5\u4e8b\u306e\u73fe\u5834\u3067\u6d3b\u304b\u305b\u308b\u571f\u8cea\u529b\u5b66\u3092\u6cd5\u9762\u5c4b\u304c\u89e3\u8aac\u3057\u307e\u3059\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/norimen.net\/en\/cohesion-phi-2\/\" \/>\n<meta property=\"og:site_name\" content=\"\u65b0\u30a8\u30f3\u30bf\u306e\u6cd5\u9762\u7ba1\u7406\u587e\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/norimenman\" \/>\n<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/norimenman\/\" \/>\n<meta property=\"article:published_time\" content=\"2025-09-19T14:00:42+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-05-16T08:05:09+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2025\/09\/4d6e1912684e7edf660e5f589c892258-1.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"500\" \/>\n\t<meta property=\"og:image:height\" content=\"500\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"\u30a8\u30f3\u30bf\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@norimenman\" \/>\n<meta name=\"twitter:site\" content=\"@norimenman\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u30a8\u30f3\u30bf\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/norimen.net\\\/cohesion-phi-2\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/norimen.net\\\/cohesion-phi-2\\\/\"},\"author\":{\"name\":\"\u30a8\u30f3\u30bf\",\"@id\":\"https:\\\/\\\/norimen.net\\\/#\\\/schema\\\/person\\\/7e507d48b040ed0f7a88ef4625070b95\"},\"headline\":\"\u6cd5\u9762\u5c4b\u306f\u77e5\u3063\u3066\u3044\u3066\u6b32\u3057\u3044\u3001\u73fe\u5834\u3067\u3088\u304f\u4f7f\u3046\u7c98\u7740\u529b\uff43\u3068\u5185\u90e8\u6469\u64e6\u89d2\u03c6\u306e\u8a71\u3057\uff08\u305d\u306e2\uff09\",\"datePublished\":\"2025-09-19T14:00:42+00:00\",\"dateModified\":\"2026-05-16T08:05:09+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/norimen.net\\\/cohesion-phi-2\\\/\"},\"wordCount\":9,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/norimen.net\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/norimen.net\\\/cohesion-phi-2\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/norimen.net\\\/wordpress\\\/wp-content\\\/uploads\\\/2025\\\/09\\\/4d6e1912684e7edf660e5f589c892258-1.jpg\",\"keywords\":[\"\u30d9\u30fc\u30f3\u8a66\u9a13\",\"\u4e00\u8ef8\u5727\u7e2e\u8a66\u9a13\",\"\u4e00\u9762\u305b\u3093\u65ad\u8a66\u9a13\",\"\u4e09\u8ef8\u5727\u7e2e\u8a66\u9a13\",\"\u5185\u90e8\u6469\u64e6\u89d2\u03c6\",\"\u571f\u306e\u5f37\u3055\",\"\u7c98\u7740\u529bC\"],\"articleSection\":[\"\u6cd5\u9762\u5de5\u5168\u822c\",\"\u65bd\u5de5\u7ba1\u7406\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/norimen.net\\\/cohesion-phi-2\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/norimen.net\\\/cohesion-phi-2\\\/\",\"url\":\"https:\\\/\\\/norimen.net\\\/cohesion-phi-2\\\/\",\"name\":\"\u6cd5\u9762\u5c4b\u306f\u77e5\u3063\u3066\u3044\u3066\u6b32\u3057\u3044\u3001\u73fe\u5834\u3067\u3088\u304f\u4f7f\u3046\u7c98\u7740\u529b\uff43\u3068\u5185\u90e8\u6469\u64e6\u89d2\u03c6\u306e\u8a71\u3057\uff08\u305d\u306e2\uff09 - \u65b0\u30a8\u30f3\u30bf\u306e\u6cd5\u9762\u7ba1\u7406\u587e\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/norimen.net\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/norimen.net\\\/cohesion-phi-2\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/norimen.net\\\/cohesion-phi-2\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/norimen.net\\\/wordpress\\\/wp-content\\\/uploads\\\/2025\\\/09\\\/4d6e1912684e7edf660e5f589c892258-1.jpg\",\"datePublished\":\"2025-09-19T14:00:42+00:00\",\"dateModified\":\"2026-05-16T08:05:09+00:00\",\"description\":\"\u6cd5\u9762\u5c4b\u306b\u77e5\u3063\u3066\u3044\u3066\u6b32\u3057\u3044\u7c98\u7740\u529bc\u3068\u5185\u90e8\u6469\u64e6\u89d2\u03c6\u306e\u8a71\u30b7\u30ea\u30fc\u30ba\u305d\u306e2\u3002\u6cd5\u9762\u5de5\u4e8b\u306e\u73fe\u5834\u3067\u6d3b\u304b\u305b\u308b\u571f\u8cea\u529b\u5b66\u3092\u6cd5\u9762\u5c4b\u304c\u89e3\u8aac\u3057\u307e\u3059\u3002\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/norimen.net\\\/cohesion-phi-2\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/norimen.net\\\/cohesion-phi-2\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/norimen.net\\\/cohesion-phi-2\\\/#primaryimage\",\"url\":\"https:\\\/\\\/norimen.net\\\/wordpress\\\/wp-content\\\/uploads\\\/2025\\\/09\\\/4d6e1912684e7edf660e5f589c892258-1.jpg\",\"contentUrl\":\"https:\\\/\\\/norimen.net\\\/wordpress\\\/wp-content\\\/uploads\\\/2025\\\/09\\\/4d6e1912684e7edf660e5f589c892258-1.jpg\",\"width\":500,\"height\":500,\"caption\":\"\u5185\u90e8\u6469\u64e6\u89d2\u03c6\u3068\u7c98\u7740\u529bC\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/norimen.net\\\/cohesion-phi-2\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u30db\u30fc\u30e0\",\"item\":\"https:\\\/\\\/norimen.net\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"\u6cd5\u9762\u5c4b\u306f\u77e5\u3063\u3066\u3044\u3066\u6b32\u3057\u3044\u3001\u73fe\u5834\u3067\u3088\u304f\u4f7f\u3046\u7c98\u7740\u529b\uff43\u3068\u5185\u90e8\u6469\u64e6\u89d2\u03c6\u306e\u8a71\u3057\uff08\u305d\u306e2\uff09\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/norimen.net\\\/#website\",\"url\":\"https:\\\/\\\/norimen.net\\\/\",\"name\":\"\u65b0\u30a8\u30f3\u30bf\u306e\u6cd5\u9762\u7ba1\u7406\u587e\",\"description\":\"\u6cd5\u9762\u306e\u4e8b\u3092\u672c\u6c17\u3067\u77e5\u308a\u305f\u3044\u3042\u306a\u305f\u3078\uff01\",\"publisher\":{\"@id\":\"https:\\\/\\\/norimen.net\\\/#organization\"},\"alternateName\":\"\u30a8\u30f3\u30bf\u306e\u30ce\u30ea\u30e1\u30f3\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/norimen.net\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":[\"Organization\",\"Place\"],\"@id\":\"https:\\\/\\\/norimen.net\\\/#organization\",\"name\":\"\u65b0\u30a8\u30f3\u30bf\u306e\u6cd5\u9762\u7ba1\u7406\u587e\",\"alternateName\":\"\u5869\u7530\u958b\u767a\u682a\u5f0f\u4f1a\u793e\",\"url\":\"https:\\\/\\\/norimen.net\\\/\",\"logo\":{\"@id\":\"https:\\\/\\\/norimen.net\\\/cohesion-phi-2\\\/#local-main-organization-logo\"},\"image\":{\"@id\":\"https:\\\/\\\/norimen.net\\\/cohesion-phi-2\\\/#local-main-organization-logo\"},\"sameAs\":[\"https:\\\/\\\/www.facebook.com\\\/norimenman\",\"https:\\\/\\\/x.com\\\/norimenman\",\"https:\\\/\\\/www.instagram.com\\\/enta.d\"],\"telephone\":[],\"openingHoursSpecification\":[{\"@type\":\"OpeningHoursSpecification\",\"dayOfWeek\":[\"Monday\",\"Tuesday\",\"Wednesday\",\"Thursday\",\"Friday\",\"Saturday\",\"Sunday\"],\"opens\":\"09:00\",\"closes\":\"17:00\"}]},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/norimen.net\\\/#\\\/schema\\\/person\\\/7e507d48b040ed0f7a88ef4625070b95\",\"name\":\"\u30a8\u30f3\u30bf\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/7b9657262458e754e6e51a10396868dafe6afa60d649dffcd4d52a5fc01aaa7d?s=96&d=monsterid&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/7b9657262458e754e6e51a10396868dafe6afa60d649dffcd4d52a5fc01aaa7d?s=96&d=monsterid&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/7b9657262458e754e6e51a10396868dafe6afa60d649dffcd4d52a5fc01aaa7d?s=96&d=monsterid&r=g\",\"caption\":\"\u30a8\u30f3\u30bf\"},\"description\":\"\u5927\u624b\u6cd5\u9762\u5c02\u9580\u5efa\u8a2d\u4f1a\u793e\u306b\u5c31\u8077\u5f8c\u300132\u6b73\u3067\u72ec\u7acb\u3002 \u3042\u307e\u308a\u306e\u6687\u3055\u306b\u30d6\u30ed\u30b0\u3092\u958b\u8a2d\u3002\u6cd5\u9762\u306e\u30ce\u30a6\u30cf\u30a6\u3092\u516c\u958b\u3057\u3001\u3042\u308a\u3068\u3042\u3089\u3086\u308b\u8cea\u554f\u306b\u7b54\u3048\u3066\u304d\u307e\u3057\u305f\u3002 \u305d\u306e\u7d50\u679c\u3001\u6cd5\u9762\u696d\u8005\u3001\u5143\u8acb\u696d\u8005\u3001\u305d\u306e\u4ed6\u30bc\u30cd\u30b3\u30f3\u304b\u3089\u306e\u554f\u3044\u5408\u308f\u305b\u3001\u8cea\u554f\u3001\u53d7\u6ce8\u304c\u5897\u3048\u3066\u304d\u307e\u3057\u305f\u3002 \u30a2\u30e1\u30d6\u30ed\u3067\u306f\u30bd\u30b3\u30bd\u30b3\u95b2\u89a7\u304c\u5897\u3048\u3001 \u305d\u3053\u3067\u72ec\u81ea\u30c9\u30e1\u30a4\u30f3\u3092\u53d6\u5f97\u3057\u5c11\u3057\u3067\u3082\u5feb\u9069\u306a\u30d6\u30ed\u30b0\u3092\u76ee\u5dee\u3059\u3079\u304f\u3001\u30a2\u30e1\u30d6\u30ed\u304b\u3089\u306e\u5352\u696d\u3092\u6c7a\u3081\u307e\u3057\u305f\u3002 \u4eca\u5f8c\u3082\u3053\u3061\u3089\u3067\u5305\u307f\u96a0\u3055\u305a\u5168\u3066\u306e\u30ce\u30a6\u30cf\u30a6\u3092\u516c\u958b\u3057\u3066\u3044\u3053\u3046\u3068\u601d\u3063\u3066\u3044\u307e\u3059\u3002 \u4eca\u5f8c\u3068\u3082\u3088\u308d\u3057\u304f\u304a\u9858\u3044\u7533\u3057\u4e0a\u3052\u307e\u3059\u3002\",\"sameAs\":[\"http:\\\/\\\/enta-d.co.jp\\\/\",\"https:\\\/\\\/www.facebook.com\\\/norimenman\\\/\",\"https:\\\/\\\/www.instagram.com\\\/enta.d\\\/\",\"https:\\\/\\\/x.com\\\/norimenman\",\"https:\\\/\\\/www.youtube.com\\\/c\\\/entadnorimenman\"]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/norimen.net\\\/cohesion-phi-2\\\/#local-main-organization-logo\",\"url\":\"https:\\\/\\\/norimen.net\\\/wordpress\\\/wp-content\\\/uploads\\\/2016\\\/10\\\/site_title_logo.png\",\"contentUrl\":\"https:\\\/\\\/norimen.net\\\/wordpress\\\/wp-content\\\/uploads\\\/2016\\\/10\\\/site_title_logo.png\",\"width\":220,\"height\":50,\"caption\":\"\u65b0\u30a8\u30f3\u30bf\u306e\u6cd5\u9762\u7ba1\u7406\u587e\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"What Slope Engineers Should Know: A Discussion of Cohesion (c) and Angle of Internal Friction (\u03c6), Commonly Used on Construction Sites (Part 2) - Shin-Ent's Slope Management School","description":"Part 2 of our series on cohesion (c) and the angle of internal friction (\u03c6)\u2014topics every slope engineer should know. A slope engineer explains soil mechanics that can be applied on slope construction sites.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/norimen.net\/en\/cohesion-phi-2\/","og_locale":"en_US","og_type":"article","og_title":"\u6cd5\u9762\u5c4b\u306f\u77e5\u3063\u3066\u3044\u3066\u6b32\u3057\u3044\u3001\u73fe\u5834\u3067\u3088\u304f\u4f7f\u3046\u7c98\u7740\u529b\uff43\u3068\u5185\u90e8\u6469\u64e6\u89d2\u03c6\u306e\u8a71\u3057\uff08\u305d\u306e2\uff09","og_description":"\u6cd5\u9762\u5c4b\u306b\u77e5\u3063\u3066\u3044\u3066\u6b32\u3057\u3044\u7c98\u7740\u529bc\u3068\u5185\u90e8\u6469\u64e6\u89d2\u03c6\u306e\u8a71\u30b7\u30ea\u30fc\u30ba\u305d\u306e2\u3002\u6cd5\u9762\u5de5\u4e8b\u306e\u73fe\u5834\u3067\u6d3b\u304b\u305b\u308b\u571f\u8cea\u529b\u5b66\u3092\u6cd5\u9762\u5c4b\u304c\u89e3\u8aac\u3057\u307e\u3059\u3002","og_url":"https:\/\/norimen.net\/en\/cohesion-phi-2\/","og_site_name":"\u65b0\u30a8\u30f3\u30bf\u306e\u6cd5\u9762\u7ba1\u7406\u587e","article_publisher":"https:\/\/www.facebook.com\/norimenman","article_author":"https:\/\/www.facebook.com\/norimenman\/","article_published_time":"2025-09-19T14:00:42+00:00","article_modified_time":"2026-05-16T08:05:09+00:00","og_image":[{"width":500,"height":500,"url":"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2025\/09\/4d6e1912684e7edf660e5f589c892258-1.jpg","type":"image\/jpeg"}],"author":"\u30a8\u30f3\u30bf","twitter_card":"summary_large_image","twitter_creator":"@norimenman","twitter_site":"@norimenman","twitter_misc":{"Written by":"\u30a8\u30f3\u30bf"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/norimen.net\/cohesion-phi-2\/#article","isPartOf":{"@id":"https:\/\/norimen.net\/cohesion-phi-2\/"},"author":{"name":"\u30a8\u30f3\u30bf","@id":"https:\/\/norimen.net\/#\/schema\/person\/7e507d48b040ed0f7a88ef4625070b95"},"headline":"\u6cd5\u9762\u5c4b\u306f\u77e5\u3063\u3066\u3044\u3066\u6b32\u3057\u3044\u3001\u73fe\u5834\u3067\u3088\u304f\u4f7f\u3046\u7c98\u7740\u529b\uff43\u3068\u5185\u90e8\u6469\u64e6\u89d2\u03c6\u306e\u8a71\u3057\uff08\u305d\u306e2\uff09","datePublished":"2025-09-19T14:00:42+00:00","dateModified":"2026-05-16T08:05:09+00:00","mainEntityOfPage":{"@id":"https:\/\/norimen.net\/cohesion-phi-2\/"},"wordCount":9,"commentCount":0,"publisher":{"@id":"https:\/\/norimen.net\/#organization"},"image":{"@id":"https:\/\/norimen.net\/cohesion-phi-2\/#primaryimage"},"thumbnailUrl":"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2025\/09\/4d6e1912684e7edf660e5f589c892258-1.jpg","keywords":["\u30d9\u30fc\u30f3\u8a66\u9a13","\u4e00\u8ef8\u5727\u7e2e\u8a66\u9a13","\u4e00\u9762\u305b\u3093\u65ad\u8a66\u9a13","\u4e09\u8ef8\u5727\u7e2e\u8a66\u9a13","\u5185\u90e8\u6469\u64e6\u89d2\u03c6","\u571f\u306e\u5f37\u3055","\u7c98\u7740\u529bC"],"articleSection":["\u6cd5\u9762\u5de5\u5168\u822c","\u65bd\u5de5\u7ba1\u7406"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/norimen.net\/cohesion-phi-2\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/norimen.net\/cohesion-phi-2\/","url":"https:\/\/norimen.net\/cohesion-phi-2\/","name":"What Slope Engineers Should Know: A Discussion of Cohesion (c) and Angle of Internal Friction (\u03c6), Commonly Used on Construction Sites (Part 2) - Shin-Ent's Slope Management School","isPartOf":{"@id":"https:\/\/norimen.net\/#website"},"primaryImageOfPage":{"@id":"https:\/\/norimen.net\/cohesion-phi-2\/#primaryimage"},"image":{"@id":"https:\/\/norimen.net\/cohesion-phi-2\/#primaryimage"},"thumbnailUrl":"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2025\/09\/4d6e1912684e7edf660e5f589c892258-1.jpg","datePublished":"2025-09-19T14:00:42+00:00","dateModified":"2026-05-16T08:05:09+00:00","description":"Part 2 of our series on cohesion (c) and the angle of internal friction (\u03c6)\u2014topics every slope engineer should know. A slope engineer explains soil mechanics that can be applied on slope construction sites.","breadcrumb":{"@id":"https:\/\/norimen.net\/cohesion-phi-2\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/norimen.net\/cohesion-phi-2\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/norimen.net\/cohesion-phi-2\/#primaryimage","url":"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2025\/09\/4d6e1912684e7edf660e5f589c892258-1.jpg","contentUrl":"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2025\/09\/4d6e1912684e7edf660e5f589c892258-1.jpg","width":500,"height":500,"caption":"\u5185\u90e8\u6469\u64e6\u89d2\u03c6\u3068\u7c98\u7740\u529bC"},{"@type":"BreadcrumbList","@id":"https:\/\/norimen.net\/cohesion-phi-2\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u30db\u30fc\u30e0","item":"https:\/\/norimen.net\/"},{"@type":"ListItem","position":2,"name":"\u6cd5\u9762\u5c4b\u306f\u77e5\u3063\u3066\u3044\u3066\u6b32\u3057\u3044\u3001\u73fe\u5834\u3067\u3088\u304f\u4f7f\u3046\u7c98\u7740\u529b\uff43\u3068\u5185\u90e8\u6469\u64e6\u89d2\u03c6\u306e\u8a71\u3057\uff08\u305d\u306e2\uff09"}]},{"@type":"WebSite","@id":"https:\/\/norimen.net\/#website","url":"https:\/\/norimen.net\/","name":"Shin-Ent's Slope Management Seminar","description":"For those of you who are serious about learning about slopes!","publisher":{"@id":"https:\/\/norimen.net\/#organization"},"alternateName":"\u30a8\u30f3\u30bf\u306e\u30ce\u30ea\u30e1\u30f3","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/norimen.net\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":["Organization","Place"],"@id":"https:\/\/norimen.net\/#organization","name":"Shin-Ent's Slope Management Seminar","alternateName":"\u5869\u7530\u958b\u767a\u682a\u5f0f\u4f1a\u793e","url":"https:\/\/norimen.net\/","logo":{"@id":"https:\/\/norimen.net\/cohesion-phi-2\/#local-main-organization-logo"},"image":{"@id":"https:\/\/norimen.net\/cohesion-phi-2\/#local-main-organization-logo"},"sameAs":["https:\/\/www.facebook.com\/norimenman","https:\/\/x.com\/norimenman","https:\/\/www.instagram.com\/enta.d"],"telephone":[],"openingHoursSpecification":[{"@type":"OpeningHoursSpecification","dayOfWeek":["Monday","Tuesday","Wednesday","Thursday","Friday","Saturday","Sunday"],"opens":"09:00","closes":"17:00"}]},{"@type":"Person","@id":"https:\/\/norimen.net\/#\/schema\/person\/7e507d48b040ed0f7a88ef4625070b95","name":"Entertainment","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/7b9657262458e754e6e51a10396868dafe6afa60d649dffcd4d52a5fc01aaa7d?s=96&d=monsterid&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/7b9657262458e754e6e51a10396868dafe6afa60d649dffcd4d52a5fc01aaa7d?s=96&d=monsterid&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/7b9657262458e754e6e51a10396868dafe6afa60d649dffcd4d52a5fc01aaa7d?s=96&d=monsterid&r=g","caption":"\u30a8\u30f3\u30bf"},"description":"After joining a major construction company specializing in slope stabilization, I went independent at the age of 32. With so much free time on my hands, I started a blog. I\u2019ve been sharing my expertise on slope stabilization and answering all kinds of questions. As a result, I\u2019ve seen an increase in inquiries, questions, and orders from slope stabilization contractors, general contractors, and other major construction firms. My traffic on Ameblo grew to a reasonable level, so I decided to move on from Ameblo by acquiring my own domain in order to create a more user-friendly blog. I plan to continue sharing all my expertise openly and honestly here. I look forward to your continued support.","sameAs":["http:\/\/enta-d.co.jp\/","https:\/\/www.facebook.com\/norimenman\/","https:\/\/www.instagram.com\/enta.d\/","https:\/\/x.com\/norimenman","https:\/\/www.youtube.com\/c\/entadnorimenman"]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/norimen.net\/cohesion-phi-2\/#local-main-organization-logo","url":"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2016\/10\/site_title_logo.png","contentUrl":"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2016\/10\/site_title_logo.png","width":220,"height":50,"caption":"\u65b0\u30a8\u30f3\u30bf\u306e\u6cd5\u9762\u7ba1\u7406\u587e"}]}},"jetpack_likes_enabled":true,"jetpack_sharing_enabled":true,"publishpress_future_action":{"enabled":false,"date":"2026-08-20 10:04:21","action":"change-status","newStatus":"draft","terms":[],"taxonomy":"category","extraData":[]},"publishpress_future_workflow_manual_trigger":{"enabledWorkflows":[]},"jetpack_featured_media_url":"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2025\/09\/4d6e1912684e7edf660e5f589c892258-1.jpg","_links":{"self":[{"href":"https:\/\/norimen.net\/en\/wp-json\/wp\/v2\/posts\/55752","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/norimen.net\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/norimen.net\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/norimen.net\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/norimen.net\/en\/wp-json\/wp\/v2\/comments?post=55752"}],"version-history":[{"count":2,"href":"https:\/\/norimen.net\/en\/wp-json\/wp\/v2\/posts\/55752\/revisions"}],"predecessor-version":[{"id":63416,"href":"https:\/\/norimen.net\/en\/wp-json\/wp\/v2\/posts\/55752\/revisions\/63416"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/norimen.net\/en\/wp-json\/wp\/v2\/media\/55746"}],"wp:attachment":[{"href":"https:\/\/norimen.net\/en\/wp-json\/wp\/v2\/media?parent=55752"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/norimen.net\/en\/wp-json\/wp\/v2\/categories?post=55752"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/norimen.net\/en\/wp-json\/wp\/v2\/tags?post=55752"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}