深基坑内支撑后拆体系施工技术  

Construction Technology of Post-dismantling System for Deep Foundation Pit Support

作　　者：罗鑫 王辉 黄沛林[1] 彭建永 金国栋[1] 陈华[1] LUO Xin;WANG Hui;HUANG Peilin;PENG Jianyong;JIN Guodong;CHEN Hua(China Construction Eighth Engineering Division Co.,Ltd.,Shanghai 201204,China)

机构地区：[1]中国建筑第八工程局有限公司,上海201204

出　　处：《建筑施工》2021年第6期996-998,1001,共4页Building Construction

基　　金：中建八局重大项目课题(2019-2-05)。

摘　　要：在深基坑施工时,考虑现场场地小和施工工期紧等问题,经常采用后拆支撑的形式。以杭州萧山机场三期项目航站楼地下空间开发工程为例,阐述了深基坑中后拆支撑的施工方法以及后拆支撑中腰梁与地下室侧墙施工缝的防水节点施工方法。通过采用防水涂料、防水卷材、止水条及注浆管等对施工缝进行复合防水层施工,保证了施工缝在后拆支撑使用过程中的防水性能,确保了深基坑施工期间的安全性和持久性。In the construction of deep foundation pit,considering the problems of small site and tight construction period,the form of post-dismantling support is often used.Taking the terminal underground space development project of Hangzhou Xiaoshan Airport Phase III project as an example,the construction method of post-dismantling support in deep foundation pit and the waterproof joint construction method of construction joint between waist beam and basement side wall in postdismantling support.Waterproof coating,waterproof roll-roofing material,water stop strip and grouting pipe are used to construct composite waterproof layer for construction joints.It ensures the waterproof performance of construction joints in the process of post-dismantling support,and ensures the safety and durability during the construction of deep foundation pit.

关 键 词：深基坑 后拆支撑 施工缝 防水节点 

分 类 号：TU753[建筑科学—建筑技术科学]