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楼梯施工缝留设位置应该如何选择？

楼梯施工缝留设位置应该如何选择？

浏览：49次 | 提问时间： 08-03 08:58

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多一人陪伴 08-03 08:59

根据GB50204-2002标准7.4.5条款：“施工缝的位置应在混凝土浇筑前按设计要求和施工方案确定”。按规范4.4.18条“宜留置在结构受剪力较小且便于施工的部位”的规定，一般应留置在楼梯踏步的上三步或下三步的位置。

有你在就足够 08-03 09:07

对楼梯施工缝的留置，提出如下几点：　　一.框架结构或楼梯间两侧后砌隔墙的，楼梯施工缝应按规范要求留在楼梯踏步的上三步或下三步处。二.楼梯间两侧为现浇砼墙时，楼梯的施工缝宜把楼梯梁的一半即上跑楼梯梁的全部和休息平台的1/3到1/2处，全留出不浇砼，具体要求是： 1. 下层剪力墙浇筑砼时，上跑一侧（见图一）墙上应留置楼梯梁的梁窝。 2. 下跑楼梯浇筑砼时，休息平台楼梯梁只浇到一半，上跑楼梯梁那部分不浇，而且在上跑楼梯一侧休息平台的1/3—1/2处留置施工缝（见图一）也 3. 不浇筑砼。 4. 楼面浇筑砼时，上跑楼梯梁在剪力墙的支座处须塞泡沫块留置梁窝。 5. 上跑楼梯支模时，将楼梯梁、休息平台、楼梯梁支座处的施工缝表面应剔凿清理干净露出石子。 6. 在上跑楼梯砼浇筑时，接槎处浇水湿润，下一些同砼配合比无石子砂浆细致振实，形成一体。三.如按叠合梁对待，把梁打到休息平台底或楼板底。这种做法必须严格按4.4.16条叠合面要求处理。四.板式楼梯，踏步作为受力板支在两侧剪力墙上时，可在平行于踏步板的任何位置甩施工缝。

天将明 08-03 09:15

你好，施工缝的位置应设置在结构受剪力较小和便于施工的部位，且应符合下列规定：柱应留水平缝，梁、板、墙应留垂直缝。 ( 1) 施工缝应留置在基础的顶面、梁或吊车梁牛腿的下面、吊车梁的上面、无梁楼板柱帽的下面。 ( 2) 和楼板连成整体的大断面梁，施工缝应留置在板底面以下20mm～30mm处。当板下有梁托时，留置在梁托下部。 ( 3) 对于长宽比大于二比一的单向板，施工缝应留置在平行于板的短边的任何位置，同时施工缝应垂直留置，不能做成斜槎。 ( 4) 有主次梁的楼板，宜顺着次梁方向浇筑，施工缝应留置在次梁跨度中间1/3 的范围内。 ( 5) 墙上的施工缝应留置在门洞口过梁跨中1/3 范围内，也可留在纵横墙的交接处。 ( 6) 楼梯上的施工缝应留在踏步板的1/3 处。楼梯的混凝土宜连续浇注。若为多层楼梯，且上一层为现浇楼板而又未浇注时，可留置施工缝；应留置在楼梯段中间的1/3部位，但要注意接缝面应斜向垂直于楼梯轴线方向。希望我的回答能够让你满意。

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