多点同步顶推技术在杭州秋石三期钢箱梁施工中的应用

Using of Multipoint-synchronization Pushing Technology in Steel-box-girder Construction of Hangzhou Qiushi Expressway

杭州市秋石快速路三期工程主线SZ35~SZ61段位于既有艮秋立交桥正上方,属于城市繁华路段既有线施工,施工组织困难、安全风险极大。文中通过秋石三期钢箱梁顶推施工,介绍多点同步顶推技术,不仅提升了单次顶推的重量,减少顶推作业的次数,而且提高了顶推效率,缩短了既有线施工作业时间,降低了施工风险。

The third phase project mainline SZ35~SZ61of Hangzhou Qiushi Expressway is located above the Genqiu overpass,and the project belongs to the city＇s bustling section of existing way construction,with great difficulties and security risk.By the steel box beam pushing construction,multipoint synchronous pushing technology is introduced,which not only enhances the single pushing weight,reduces the number of pushing,but also improves the efficiency,reduces the construction time of the existing line and the construction risk.