下立交深基坑围护工程选型与应用

摘要:

本文介绍了上海市奉贤区金海公路 (大叶公路~浦南运河) 道路改建工程航南下立交深基坑围护工程，下立交毗邻上 海市地铁轨交 5 号线，开挖深度最大约 11.2m ，周边场地狭小、地质环境复杂，土层以粘土为主，地下水系发达，存在承压水， 设计和实际施工困难。文章通过分析该基坑的开挖深度、周边环境、周边重要管线、建 (构) 筑物的影响等因素，确定了基坑 的安全等级及环境保护等级，明确了基坑的围护形式。

Abstract:

This paper introduces the Jinhai Highway (Daye Highway ~ Punan Canal) road reconstruction project in Fengxian District, Shanghai, the deep foundation pit enclosure project of the Southbound Interchange, the lower interchange is adjacent to the Shanghai Metro Rail Transit Line 5, the excavation depth is about 11.2m, the surrounding site is small, the geological environment is complex, the soil layer is mainly clay, the groundwater system is developed, there is pressurized water, design and practical construction difficulties. This paper analyzes the excavation depth of the pit, the surrounding environment, the influence of important pipelines around the pit, and the influence of buildings (structures) to determine the foundation pit The safety level and environmental protection level clarify the enclosure form of the foundation pit.