大跨径双层桥梁水中主墩超深基坑施工关键技术研究  

Study on Key Construction Techniques for Super Deep Foundation Pit for Main Piers in Water for Long-span Double-deck Bridge

作　　者：姚建平 YAO Jianping(Shanghai Nanhui Construction(Group)Co.,Ltd.,Shanghai 201206,China)

机构地区：[1]上海南汇建工建设(集团)有限公司,上海201206

出　　处：《建筑施工》2024年第5期737-740,共4页Building Construction

摘　　要：桥梁结构位于水中的墩台,必须考虑水中作业环境下的特殊要求。采用可行的围堰方法、合理的支护体系和更安全、易操作的施工方法是水中施工作业的关键。依托工程案例,主要介绍采用双层拉森钢板桩作为主墩围堰的超深基坑支护体系施工工艺,经实践,施工方便、安全高效,在内河水域施工中是一个很好的选择。The pier and abutment of bridge structure located in the water must take into account the special requirements of underwater working environment.The adoption of a feasible cofferdam method,a reasonable support system,and a safer,more easily operated construction method are crutial for underwater construction.Based on an engineering case,this paper primarily introduces the construction process of super deep foundation pit support system,which uses a double-layer Larsen steel sheet pile as the main pier cofferdam.The practice proves that it is convenient,safe,and efficient,making it an satisfactory choice for construction of inland waters.

关 键 词：大跨径 桥梁工程 水中主墩 超深基坑 

分 类 号：TU753[建筑科学—建筑技术科学]