预应力型钢组合支撑在邻地铁基坑施工中的应用

Application of Pre-Stressed Section Steel Combination Support in Construction of Foundation Pit Adjacent to Subway

杭州市某深基坑工程下有地铁线路南北穿过,遂决定将其分为东西两区施工。东区先行施工,拟采用大范围内一道预应力型钢组合支撑的方案。介绍了型钢组合支撑的支护方案设计方法、施工工艺和变形监测等内容。经实测数据分析,验证了其工程应用是安全、可靠的,且符合绿色环保理念,可为类似工程提供参考和借鉴。

A metro line crosses a deep foundation pit project in Hangzhou from north to south,so it is decided to divide the project into East and west areas for construction.It is proposed to adopt a scheme of large-scale pre-stressed section steel combination support to construct the east part first.This paper introduces the design method,the construction technology,and the deformation monitoring of the section steel support scheme.Through the analysis of the measured data,it is verified that the engineering application is safe,reliable and in line with the concept of green environmental protection,which can provide reference for similar projects.