近地铁结构地连墙施工技术可行性分析与应用

Technical Feasibility and Application of Diaphragm Retaining Wall near Subway Structure

摘要:

随着城市经济建设的飞速发展，城市地下空间开发项目日益增多。工程施工中经常遇到紧邻地下建筑物进行开挖、钻进等情况，特别是地下连续墙这样较大面积深层开挖的工法，势必会对原有地下建筑造成一定影响，稍有不慎，便会造成安全质量事故。结合工程实例，简要介绍了地下连续墙在上海市某紧邻地铁结构基坑工程中的应用。通过可行性分析，采取相关的施工过程控制措施使其在施工过程中对地铁结构的变形影响达到最小，实践证明了该法对同类复杂工程的适应性。

关键词:近地铁结构;地下连续墙;基坑支护;可行性分析;应用

Abstract:

With the rapid development of urban economic construction, the project of urban underground space keeps increasing. Excavating and drilling adjacent to underground structures are usually encountered in engineering construction; especially for the large area and deep excavation method such as diaphragm retaining wall, which would affect original underground structures with safety and quality trouble. According to the engineering case, the paper introduced the application of diaphragm retaining wall in foundation pit near subway structures in Shanghai. By the feasibility analysis, the relevant controlling methods were adopted in the construction process to minimize the deformation effect to subway structures. The practice shows that diaphragm retaining wall is suitable for similar complex project.

Key words:near subway structure; diaphragm retaining wall; foundation pit support; feasibility analysis; application