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杭长高速公路主线高架桥长13.266km,项目位于杭嘉湖平原区,软基覆盖层较厚,大量桩基位于淤泥质土层中。在承台基坑开挖施工中,根据地质情况和施工经验,基坑支护方案以拉森钢板桩支护为主。在本文中,根据杭长高速拉森钢板桩基坑支护施工实例,从钢板桩受力计算、施工、监测等方面介绍了拉森钢板桩基坑支护在淤泥质土层的应用,并总结了施工中的经验和教训。
The main viaduct of Hang-Chang Expressway is 13.266km in length. The project is located in the plain area of Hangzhou-Jiaxing-Huzhou plain. The covered soft soil is thick with a large number of pile foundations located in muddy soil. In the construction of foundation pit excavation, according to the geological conditions and construction experience, the foundation pit support plan is mainly supported by Larsen steel sheet pile. In this paper, according to the construction example of LSTC steel sheet pile foundation pit supporting in Hangzhou-Changzhou high-speed railway, the application of Larsen steel sheet pile foundation pit support in muddy soil layer is introduced from the aspects of steel sheet pile stress calculation, construction and monitoring Summarized the construction experience and lessons learned.