{"id":46969,"date":"2022-06-01T08:00:20","date_gmt":"2022-05-31T23:00:20","guid":{"rendered":"https:\/\/norimen.net\/wordpress\/?p=46969"},"modified":"2026-05-17T00:31:56","modified_gmt":"2026-05-16T15:31:56","slug":"temporary-shotcrete-assessment","status":"publish","type":"post","link":"https:\/\/norimen.net\/en\/temporary-shotcrete-judgment\/","title":{"rendered":"Decision-Making for Temporary Sprayed Concrete Work | Tips for Safe Construction When Ground Conditions Are Poor"},"content":{"rendered":"<p>Hello, everyone.<\/p>\n<p>This is Enta.<\/p>\n<p>Are there any criteria for deciding whether to use temporary spray-applied coating?<\/p>\n<div class=\"jetpack-video-wrapper\"><iframe loading=\"lazy\" title=\"Temporary Mortar Spraying\" width=\"640\" height=\"360\" src=\"https:\/\/www.youtube.com\/embed\/GQqtJOg7QGY?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>Since material was wearing away too quickly at this site, we applied a temporary spray coat first, followed by the final spray coat.<\/p>\n<p>&nbsp;<\/p>\n<p>When the ground conditions are poor<\/p>\n<p><span style=\"font-size: 150%;\"><strong><span style=\"color: #0000ff;\">No matter how hard I try to stack the bricks, they just keep falling apart.<\/span><\/strong><\/span><\/p>\n<p><span style=\"font-size: 150%;\"><strong><span style=\"color: #0000ff;\">There are frequent rockfalls.<\/span><\/strong><\/span><\/p>\n<p><span style=\"font-size: 150%;\"><strong><span style=\"color: #0000ff;\">The slope is steep and slightly overhanging<\/span><\/strong><\/span><\/p>\n<p><span style=\"font-size: 150%;\"><strong><span style=\"color: #0000ff;\">You can still get scrapes even from a light, misty rain.<\/span><\/strong><\/span><\/p>\n<p><span style=\"font-size: 150%;\"><strong><span style=\"color: #0000ff;\">Excessive excavation during drilling (when correcting with sprayed concrete)<\/span><\/strong><\/span><\/p>\n<p>&nbsp;<\/p>\n<p>Is this what you had in mind?<\/p>\n<p>In situations like this, we perform a temporary spray application. (Temporary spray application)<\/p>\n<p>By doing so,<span style=\"font-size: 150%;\"><strong><span style=\"color: #ff0000;\">Safe Construction<\/span><\/strong><\/span>Not only is it possible, but it also makes installation easier.<\/p>\n<p>Rockfalls are particularly dangerous, so I recommend using a temporary blast.<\/p>\n<p>&nbsp;<\/p>\n<p>After planing the wood, I'll nail down the lath, but,<\/p>\n<p>A common question that comes up at this point is, \u201cAren\u2019t the \u2018temporary blow\u2019 and the \u2018final blow\u2019 separate?\u201d<\/p>\n<p>That's certainly possible, but it's not a problem.<\/p>\n<p>That's because mortar is sprayed to smooth out unevenness on slopes.<\/p>\n<p>Since that mortar will be located beneath the designed structure, it is considered part of the natural ground.<\/p>\n<p><span style=\"font-size: 150%;\"><strong><span style=\"color: #ff0000;\">Temporary sprayed concrete shall be treated as natural ground.<\/span><\/strong><\/span>That's the way it is.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-39628\" src=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2019\/07\/2015-09-07-10.52.06-600x338.jpg\" alt=\"Mortar Spraying Worker\" width=\"600\" height=\"338\" \/><\/p>\n<p>That means it doesn't need to be that strong, so even a low-strength mix is acceptable.<\/p>\n<p>Well, if the quantity is small, I guess I'd just use the standard mix.<\/p>\n<p>As long as the strength is equal to or greater than that of the natural ground, there is no problem.<\/p>\n<p>It amounts to a \"throwaway\" mindset.<\/p>\n<p>&nbsp;<\/p>\n<p>When the natural ground is unstable, install temporary shoring to ensure safe construction.<\/p>\n<p>It\u2019s also possible to bring the matter up for discussion at the local government office and have them review the design, so in some cases, having them review it might save you from having to come up with those \u201cmagic words\u201d or get creative lol.<\/p>\n<p>&nbsp;<\/p>\n<p>See you later.<\/p>","protected":false},"excerpt":{"rendered":"<p>Hello, everyone. This is Enta. Are there any criteria for deciding when to perform a temporary spray coat? At this site, the surface was eroding so rapidly that we applied a temporary spray coat first, followed by the main spray coat.   When the natural rock face is in poor condition, even if you try to install lath, it just keeps crumbling away. There are a lot of falling rocks\u2026<\/p>","protected":false},"author":2,"featured_media":6093,"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":[37],"tags":[139,291,2586,2587,5176,5177,5178],"class_list":["post-46969","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mortar-spraying","tag-139","tag-291","tag-2586","tag-2587","tag-5176","tag-5177","tag-5178"],"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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