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梁板浇筑施工缝设置

梁板浇筑施工缝设置

浏览：46次 | 提问时间： 08-04 11:30

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无心魔 08-04 11:31

混凝土施工缝的设置原则是：留置在结构受力较小且便于施工的位置。具体位置是：梁、板等受弯构件的一般留在距支座距离为三分之一跨度的位置处，因此处的弯矩与剪力均较小。其它构件可根据受力情况确定，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～30 mm 处。当板下有梁托时，留置在梁托下部。( 3) 对于单向板，施工缝应留置在平行于板的短边的任何位置。( 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。( 7) 水池池壁的施工缝宜留在高出底板表面200 mm～500 mm 的竖壁上。( 8) 双向受力楼板、大体积混凝土、拱、壳、仓、设备基础、多层刚架及其他复杂结构，施工缝位置应按设计要求留设。2、处理方法砼终凝后，挡板拆除，用斩斧或钢杆将表面凿毛，清理松动石子，此时砼强度很低，凿深20~30MM较容易，待二次浇筑砼时，提前用压力水将缝面冲洗干净，边浇边刷素水泥浆一道，以增强咬合力

翻过的亲切 08-04 11:39

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～30 mm 处。当板下有梁托时，留置在梁托下部。( 3) 对于单向板，施工缝应留置在平行于板的短边的任何位置。( 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。( 7) 水池池壁的施工缝宜留在高出底板表面200 mm～500 mm 的竖壁上。( 8) 双向受力楼板、大体积混凝土、拱、壳、仓、设备基础、多层刚架及其他复杂结构，施工缝位置应按设计要求留设。施工缝指的是在混凝土浇筑过程中，因设计要求或施工需要分段浇筑，而在先、后浇筑的混凝土之间所形成的接缝。施工缝并不是一种真实存在的“缝”，它只是因先浇筑混凝土超过初凝时间，而与后浇筑的混凝土之间存在一个结合面，该结合面就称之为施工缝。

你是疯子我是傻子 08-04 11:47

施工缝设置不高于梁底即可没有规定要求施工缝留设位置在主梁底下20-30cm处，如果超过梁底势必影响梁钢筋安装，无法保证钢筋保护层厚度

爱你毁了多少爱我的人 08-04 11:56

我才不会哭睫毛膏太贵了 08-04 12:04

梁板砼施工缝处理方案：砼终凝后，挡板拆除，用斩斧或钢杆将表面凿毛，清理松动石子，此时砼强度很低，凿深20~30MM较容易，待二次浇筑砼时，提前用压力水将缝面冲洗干净，边浇边刷素水泥浆一道，以增强咬合力。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～30 mm 处。当板下有梁托时，留置在梁托下部。( 3) 对于单向板，施工缝应留置在平行于板的短边的任何位置。( 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。( 7) 水池池壁的施工缝宜留在高出底板表面200 mm～500 mm 的竖壁上。( 8) 双向受力楼板、大体积混凝土、拱、壳、仓、设备基础、多层刚架及其他复杂结构，施工缝位置应按设计要求留设。

捏不住的沙放手也罢 08-04 12:12

施工缝（construction joint）指的是在混凝土浇筑过程中，因设计要求或施工需要分段浇筑，而在先、后浇筑的混凝土之间所形成的接缝。施工缝并不是一种真实存在的“缝”，它只是因先浇筑混凝土超过初凝时间，而与后浇筑的混凝土之间存在一个结合面，该结合面就称之为施工缝。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、墙应留水平缝，梁、板的混凝土应一次浇筑，不留施工缝。⑴ 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。⑵ 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～30 mm 处。当板下有梁托时，留置在梁托下部。⑶ 对于单向板，施工缝应留置在平行于板的短边的任何位置。⑷ 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。⑸ 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。⑹ 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。（施工中存在争执原因是旧规范规定了楼梯施工缝必须留置在中间1/3区段，传统施工留置在向上、下3步处，留置在梯段中间时，理论上是剪力较小，但施工时施工缝质量不好控制，二次支模时容易产生已浇筑部位形成短时“悬挑”，反而不利于构件的质量控制。）⑺ 水池池壁的施工缝宜留在高出底板表面200 mm～500 mm 的竖壁上。⑻ 双向受力楼板、大体积混凝土、拱、壳、仓、设备基础、多层刚架及其他复杂结构，施工缝位置应按设计要求留设。

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