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对拉螺栓洞封堵施工方案讲解

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对拉螺栓孔封堵方案

汇金国际广场

对 拉 螺 栓 孔 封 堵 方 案

通州建总集团有限公司

2013年10月18日

编制: 审核:

对拉螺栓孔封堵方案

目 录

1.0工程概况 ··················································································· 3 2.0施工准备 ··················································································· 3 2.1 现场准备······················································································································· 3 2.2 技术准备······················································································································· 4 2.3 物资准备······················································································································· 4 3.0 施工方案 ·················································································· 4 4.0操作工艺 ··················································································· 5 5.0质量标准 ··················································································· 7 5.1保证项目:··················································································································· 7 5.2成品保护 ························································································································ 7 6.0安全文明施工 ············································································ 7

对拉螺栓孔封堵方案

1.0工程概况

工程名称:汇金国际广场工程 工程地点:南通市工农南路118号

建设单位:南通华东城建投资发展有限公司

设计单位:南通规划设计院有限公司、南通勘察设计有限公司 监理单位:江苏科建工程项目管理有限公司 施工单位:通州建总集团有限公司

汇金国际广场工程是一大型综合楼工程。总建筑面积143000㎡;其中1#楼24层,总建筑面积:30600㎡、2#楼26层,总建筑面积38600㎡、3#楼24层,总建筑面积:37400㎡。地下一层为地下车库建筑面积18180㎡,地下二层为地下人防工程建筑面积18220㎡,钢砼底板、剪力墙、框架梁顶板结构。

地下工程结构外墙等使用抗渗混凝土的墙体、柱、梁均采用带止水环片的对拉螺栓,因施工疏忽,人防内墙部分墙体采用带Φ14的塑料套管对拉螺栓。对于施工过程中使用带塑料套管的对拉螺栓,因结构使用功能的要求。本方案主要解决如何处理带塑料套管的对拉螺栓封堵施工的问题。

2.0施工准备

2.1 现场准备

1、准备好现场电源接驳点。

2、需要高空作业的操作架已按照要求搭设完毕。 3、已施工的墙面已将处理干净。

对拉螺栓孔封堵方案

2.2 技术准备

进行施工技术交底:分部工程施工前由项目技术负责人组织施工人员、质量人员对班组长、施工工人交底,逐项排查使用对拉螺栓的墙体,将需要封堵的对拉螺栓空洞标记,针对施工的关键部位、施工难点、质量和安全要求、操作要点及注意事项等进行全面的交底,各个班组长接受交底后组织操作工人认真学习,并要求落实在各个施工环节之上。 2.3 物资准备 2.3.1.材料要求

(1)水泥: 32.5级硅酸盐水泥; (2)膨胀剂:JM-ⅢC; (3) 建筑胶; (4)中粗砂。 2.3.2.主要机具

手推车、木抹子、铁抹子、小平锹、小水桶、长毛刷、喷壶、Φ12钢筋棍、钢丝刷子、小型吹风机、锤子、凿子、錾子等。 3.0 施工方案

1、 墙体内外两侧螺栓周围50mm向孔内凿进40mm,成楔形(露出主筋);

2、 将孔内PVC管清除,并将孔内壁刷毛; 3、 在孔内加Φ14钢筋,长度为墙厚-100

对拉螺栓孔封堵方案

4、 膨胀砂浆(掺胶)封堵、塞实; 5、 表面抹平压光; 4.0操作工艺 工艺流程:

螺栓孔剔凿、清理孔内→钢丝刷刷毛→加Φ14钢筋→洒水润湿→灌膨胀砂浆→表面抹平压光

(1) 螺栓孔周围向孔内剔凿40mm:先将孔内的PVC管清除,再用錾子

进行剔凿,剔凿向墙体剔进40mm,即露出主筋,成楔形。剔凿后及时把螺栓孔内的碎渣和杂物清理出来。

(2) 钢丝刷刷毛:待清理干净后,用钢丝刷绕周圈刷毛,用吹风机吹

干净。

(3) 加Φ14钢筋:在孔内加Φ14钢筋,长度为墙厚-100

(4) 洒水润湿:使用喷壶进行喷水润湿,在施工前一小时进行喷水,

使螺栓孔周围保持湿润。施工时再进行小量喷水,以便施工。 (5) 灌膨胀砂浆: 用铁抹子将膨胀砂浆抹到螺栓孔。灌进去一部分

后,两头用钢筋棍捣实后,待凝固后,在继续灌捣,最后用铁抹子将螺栓孔处抹平压光。施工应从上而下进行,作业时要做好安全防护。

对拉螺栓洞封堵施工方案讲解

对拉螺栓孔封堵方案汇金国际广场对拉螺栓孔封堵方案通州建总集团有限公司2013年10月18日编制:
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