深基坑施工过程中地下人防结构处理技术研究

Research on Techniques of Treating Underground Air-defense Structure Used in Construction of Deep Foundation Pit

阐述了地下连续墙向下贯穿既有人防结构的施工技术,通过数值模型分析了人防结构处理过程中地下连续墙的变形特性,及人防结构的支撑效应,并与实测数据进行了对比。现场结果表明:施工过程中地下连续墙的变形与计算结果吻合较好,满足规范要求,说明本工程的地下人防结构处理技术制定合理、施工措施得当,基坑处于安全范围之内。

An introduction is made to the construction techniques of concrete diaphragm wall penetrating the existing air defense structure. A numerical model is also used to analyze the deformation characteristic of concrete diaphragm wall and the support effect of air defense structure while treating air defense structure. The analysis results are compared with the measured data. The results show that the deformation of concrete diaphragm wall accords with the calculated results well and meets the requirement of relevant specification during the construction. In the case, the combination of reasonable techniques of treating undergrotmd air defense structure and appropriate construction measures guarantees the safety of foundation pit in the project.