软土地基深基坑拉森钢板桩支护关键技术研究——以北洋泾路为例

依托上海市北洋泾路扩建工程，重点研究了软土地基深基坑采用拉森钢板桩作为基坑围护的关键技术和安全管理措施。根据工程所处的地质条件和支护方案，总结了软土地基深基坑拉森钢板桩支护施工的难点。结合支护施工方案，分析了拉森钢板桩施工的关键技术，并在此基础上提出了施工控制技术参数和相应的安全保障措施，为拉森钢板桩在软土地基深基坑支护中的应用提供借鉴与参考。

Research on Key Technologies of Larsen Steel Sheet Pile Support for Deep Foundation Pits on Soft Soil Ground in North Yangjing Road

Relying on Shanghai North Yangjing Road Extension Project, the key technologies and safety management measures of using Larsen steel sheet piles as the pit support for the deep foundation pits on soft soil ground are specially studied. According to the geological conditions and support scheme of the project, the difficulties of Larsen sheet pile support construction for the deep foundation pits on soft soil ground are summarized. Combined with the support construction scheme, the key technologies of Larsen steel sheet pile construction are analyzed step by step. On this basis, the construction control technical parameters and the corresponding safety precautions are proposed to provide the reference for the application of Larsen steel sheet pile in deep foundation pit support on the soft soil ground.