![\"Zabuton](\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2019\/09\/d067b5eafe199db084dffa8f774cd3c0-600x450.jpg\")
<\/p>\nHello, everyone.<\/p>\n
This is Enta.<\/p>\n
How is positioning handled in ground anchor construction?<\/p>\n
I get asked about this quite often, so I thought I\u2019d write about it this time.<\/p>\n
<\/p>\n
The drawing is described in rather vague terms.<\/p>\n
<\/p>\n
That said, since the load is often distributed to the left and right of the design cross-section, that cross-section essentially serves as the reference.<\/p>\n
Since this is the cross-section being analyzed for design calculations, it is also referred to as the \"design cross-section.\" It is also known as the \"main measurement line.\"<\/p>\n
<\/p>\n
1. Transfer the coordinate values to the natural ground.<\/span><\/strong><\/span><\/p>\n Using floor plans and cross-sectional drawings (Seema data), we determine the installation locations for ground anchors in the natural ground.<\/p>\n When we say \"determine this placement position,\" we meanCoordinate values<\/span><\/strong><\/span>That's it.<\/p>\n Once you import the Seema data into CAD, it's easy to get the coordinate values, isn't it?<\/p>\n <\/p>\n It's at the location marked by the red circle above.<\/p>\n Transfer this position to the natural ground to complete the positioning.<\/p>\n What you'll want to check at this point is the horizontal pitch.<\/p>\n If you're using coordinates, I don't think there should be much of a discrepancy, but I'm just checking to be sure.<\/p>\n <\/p>\n 2. Determine the reference cross-section for the design study.<\/span><\/strong><\/span><\/p>\n In cases where the worksite is narrow, layout considerations take priority.<\/p>\n Therefore, I will first present the design study cross-section (the cross-section for which ground anchor construction was considered).<\/p>\n Allocating it to the left and right pitches will result in a more visually pleasing alignment.<\/p>\n This is particularly common when the structure under pressure is a retaining wall.<\/p>\n Although we have a rough idea of the anchor\u2019s location, we need to install the formwork within the construction area, so,<\/p>\n If you just force the anchor position without considering other factors, the appearance of the text block could end up looking less than ideal.<\/p>\n <\/p>\n I think most of them are based on those two points mentioned above.<\/p>\n Once this is finalized, we'll start drilling.<\/p>\n And I imagine some of you might be wondering about this.<\/p>\n What's going to happen with the positioning error!?<\/span><\/strong><\/span>\"I can't manage it based on the difference in coordinates!!\"<\/p>\n If you mark the placement location, perform the work, and then install the load-bearing structures or anchors, you will not be able to correct any positioning errors at that same location.<\/p>\n The first position was marked with a red circle.<\/p>\n However, if a pressure-bearing structure is installed after drilling, the placement location will be the blue circle.<\/p>\n The placement location (coordinate values) will change. Furthermore, the coordinate values for this blue circle cannot be determined during the initial survey.<\/p>\n (It\u2019s not that you can\u2019t calculate it, but since you have to factor in the load-bearing plate, the cushion frame, and other components, there\u2019s really no need to go that far.)<\/p>\n <\/p>\n Using the coordinate values of the installation locations in ground anchor construction to calculate the difference<\/span><\/strong>Cannot measure.<\/span><\/strong><\/span><\/p>\n Since we cannot measure placement errors in this way, we measure placement errors using the placement position (centerline) as the reference.<\/p>\n When using an anchor scale, the initial positioning is performed on the natural ground using coordinate values from the drawing.<\/p>\n Set that position as zero. After drilling is complete, use an anchor scale to measure the error.<\/p>\n To put it simply,<\/p>\n Mark the design coordinates on the natural ground \u21d2 Install a formwork or cushion frame so that a borehole can be drilled at that point \u21d2<\/p>\n That drilling position becomes the zero point for the positioning error \u21d2 Drill \u21d2 Measure the positioning error using the casing.<\/p>\n <\/p>\n It looks something like this.<\/p>\n I guess this might be a little hard to understand, lol<\/p>\n Some people talk about \"horizontal pitch\" and such, but the point where the drilling position was initially determined is, strictly speaking, the zero point.<\/p>\n It's easy for government offices to understand, so they're on board with it for now.<\/p>\n On the other hand, since placement errors on the anchor scale have recently been incorporated as a creative technique, are they becoming more widespread?<\/p>\n Actually, everyone has their own way of doing things, so I think the method that\u2019s easiest for the administrator is the best\u2014what do you all think?<\/p>\n <\/p>\n This is just a rough overview, but I hope you get the idea.<\/p>\n In any case, positioning will be done using a laser (light beam), so please have one ready. (Positioning the main reference line is also important.)<\/p>\n <\/p>\n See you later.<\/p>","protected":false},"excerpt":{"rendered":" Hello, everyone. This is Enta. How do you go about positioning ground anchors during installation? I get asked about this quite often, so I thought I\u2019d write about it this time. The drawings are actually quite vague on this point. That said, when it comes to the design cross-section\u2026<\/p>","protected":false},"author":2,"featured_media":41827,"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":[48,108,2409,3440,3441,3442,3443,3444,3445,3446,3447],"class_list":["post-41821","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ground-anchor","tag-48","tag-108","tag-2409","tag-3440","tag-3441","tag-3442","tag-3443","tag-3444","tag-3445","tag-3446","tag-3447"],"acf":[],"yoast_head":"\n![\"Anchor](\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2020\/05\/e6e2c1e8baed722a93f6ff5ae30ab47e.png\")
<\/p>\n
\n![\"Ground](\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2020\/05\/2dfc8a944a0409e9d7526b53c331dd33.png\")
<\/p>\n![\"Anchor](\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2019\/10\/63e71f080e076880e3794376eaf07be2-600x450.jpg\")
<\/p>\n![\"Anchor](\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2019\/09\/2019-09-25-14.31.20-600x450.jpg\")
<\/p>\n