{"id":224,"date":"2017-11-29T19:30:30","date_gmt":"2017-11-29T14:00:30","guid":{"rendered":"http:\/\/disruptiveenergy.net\/patent-in-india\/?p=224"},"modified":"2019-01-08T18:39:47","modified_gmt":"2019-01-08T13:09:47","slug":"precast-wall-connection","status":"publish","type":"post","link":"https:\/\/disruptiveenergy.net\/patent-in-india\/precast-wall-connection\/","title":{"rendered":"Precast wall connection \u2013 Faster and easier method"},"content":{"rendered":"<figure style=\"width: 320px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/s26.postimg.cc\/l500pgzqh\/precast-concrete-wall-building.jpg\" alt=\"Precast wall connection example\" width=\"320\" height=\"213\" \/><figcaption class=\"wp-caption-text\">Precast Wall Connection is Critical here!<\/figcaption><\/figure>\n<h2><b>Traditional approach of building shear walls<\/b><\/h2>\n<p><a href=\"http:\/\/www.precastindia.co.in\/\" target=\"_blank\" rel=\"noopener\"><strong>Precast India Infrastructures Ltd<\/strong><\/a> have come up with new method of precast wall connection. They highlighted it as faster and easier than known methods. Construction industry today cast shear walls entirely on-site. This on-site work includes :<\/p>\n<p><!--more--><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Lifting scaffolding to the floor<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Erecting the scaffolding on sides of the wall<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Transporting prepared reinforcement from site stack yard to the floor<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Reinforcement tying<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Getting formwork to the floor<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Erecting and securing the formwork<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Hoisting or pumping concrete to the floor<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Vibrating concrete at depths of 2-3m<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Curing <\/span> <span style=\"font-weight: 400;\">on-site, Deshuttering after sufficient strength achieved<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Repeat process for every floor <\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">In this process everybody must wait to achieve sufficient strength in the wall to go up on the another floor or level. This is straight time waste with no choice. Further, above process can generate quality issues like segregation because of pouring concrete from height. You need to do lot of time management between the different teams with expertise in their particular operation. In short, everything just fall into the place just in time to get best results, and that seldom happens.<\/span><\/p>\n<h2><b>Precast wall connection by CIS joint<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Here, we can cast walls horizontally at shop floor in one shot. This precast technology saves lot of time, labour and money without compromising the quality. Stages of precast shear walls with CIS joint:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Raise precast <\/span> <span style=\"font-weight: 400;\">shear walls and scaffolding<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Support the walls<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Align and grout the bottom of precast shear wall<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Expose the wire loop by breaking concrete<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Re-bend the bent loop into straight format<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Insert steel bars from the top<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Fill the <\/span> <span style=\"font-weight: 400;\">joints of size 200mm-250mm wide by shuttering the in-situ concrete<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">The last two steps mentioned above become frustrating after the quick erection of precast shear wall. All the time saved in the precast wall is taken by preparation to joint the walls.<\/span><\/p>\n<h2><b>New precast wall connection method<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">In the new connection method, the precast walls itself made differently. This precast wall contains, apart from the horizontal and vertical reinforcement bars, multiple hollow tubes. These hollow tubes are embedded into the precast wall at designed locations in between the reinforcement bars. This connecting tube is held in place by holdfasts. The opening is provided into the precast wall, between the two connecting tubes. Also, there is a grouting tube provided to open into that opening from the surface of the wall. There are multiple grout tubes and openings at predefined locations.<\/span><\/p>\n<figure style=\"width: 254px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" title=\"Copyright:by Precast India Infrastructures Pvt Ltd\" src=\"https:\/\/s26.postimg.cc\/yxefl3qi1\/tubes-precast-shear-wall.png\" alt=\"internal structure of precast walls\" width=\"254\" height=\"320\" \/><figcaption class=\"wp-caption-text\">Inside connecting tubes and bars (Credit : Precast India Infrastructures Pvt Ltd)<\/figcaption><\/figure>\n<p><span style=\"font-weight: 400;\">Now, when the first precast wall is erected at its planned location, the connecting bars are inserted into the connecting tubes. You can actually touch the connecting bars at the openings provided into the shear wall. Then the second precast shear wall is placed at its planned location. The second wall is placed in such a way that the openings of connecting tubes from the first precast wall matches to those of the second wall. It\u2019s must be a perfect match.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">There is a connecting device used to transfer the connecting bar from the first wall to into the tubes of second shear wall. For connecting device to push these bars, the predefined openings are used. This connecting device includes active drive and suitable connection profiles of shaft to engage with the bar inside the tube. After this operation the connecting bar is partially present inside the both walls.<\/span><\/p>\n<figure style=\"width: 320px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" title=\"Copyright: by Precast India Infrastructures Pvt Ltd\" src=\"https:\/\/s26.postimg.cc\/rswmc2j8p\/precast-wall-connection-drive.png\" alt=\"precast wall connection process\" width=\"320\" height=\"180\" \/><figcaption class=\"wp-caption-text\">Bar transferring with drive (Credit :Precast India Infrastructures Pvt Ltd)<\/figcaption><\/figure>\n<p>&nbsp;<\/p>\n<p><span style=\"font-weight: 400;\">The gap between these two precast walls is just 50mm. So, the gap in the wall as well as the openings left in the walls are grouted easily by raising small supports along the walls. This way method of precast wall connection is made less labour dependent, less steel consuming, simpler, faster, CIS -less, error free, less utility consuming and safe.<\/span><\/p>\n<p><b>Related technology to wall connection<\/b><\/p>\n<p><span style=\"font-weight: 400;\"><strong>GRW Manufacturing PTY LTD<\/strong> from Austria has invented the device for the precast shear wall connection. This development by GRW dates back to the year 2014. This connection method by Precast India Infrastructure Ltd will be tough to protect.<\/span><\/p>\n<p>More on<a href=\"http:\/\/disruptiveenergy.net\/patent-in-india\/category\/civil-engineering\/\"> Civil Engineering<\/a>..<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Traditional approach of building shear walls Precast India Infrastructures Ltd have come up with new method of precast wall connection. They highlighted it as faster and easier than known methods. Construction industry today cast shear walls entirely on-site. This on-site work includes :<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"footnotes":""},"categories":[40],"tags":[],"class_list":["post-224","post","type-post","status-publish","format-standard","hentry","category-civil-engineering"],"_links":{"self":[{"href":"https:\/\/disruptiveenergy.net\/patent-in-india\/wp-json\/wp\/v2\/posts\/224","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/disruptiveenergy.net\/patent-in-india\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/disruptiveenergy.net\/patent-in-india\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/disruptiveenergy.net\/patent-in-india\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/disruptiveenergy.net\/patent-in-india\/wp-json\/wp\/v2\/comments?post=224"}],"version-history":[{"count":1,"href":"https:\/\/disruptiveenergy.net\/patent-in-india\/wp-json\/wp\/v2\/posts\/224\/revisions"}],"predecessor-version":[{"id":303,"href":"https:\/\/disruptiveenergy.net\/patent-in-india\/wp-json\/wp\/v2\/posts\/224\/revisions\/303"}],"wp:attachment":[{"href":"https:\/\/disruptiveenergy.net\/patent-in-india\/wp-json\/wp\/v2\/media?parent=224"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/disruptiveenergy.net\/patent-in-india\/wp-json\/wp\/v2\/categories?post=224"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/disruptiveenergy.net\/patent-in-india\/wp-json\/wp\/v2\/tags?post=224"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}