合肥南站南广场基坑开挖对地铁盾构区间影响分析

Influence Analysis on the Subway Shield of Foundation Excavation in the South Square of Hefei South Station

通过分析合肥南站南广场项目基坑开挖施工过程及基坑施工引起临近合肥地铁1号线隧道沉降与位移风险,采取系统评价、监测和管控等有效应对措施,探讨该项目基坑开挖对地铁影响风险。根据基坑自身特点,以变形控制为核心,考虑各影响因素,结合基坑开挖过程数值模拟,制订了临近地铁盾构区施工组织设计方案,并在施工过程中根据实际情况进行局部调整,保证了基坑工程安全。

By analyzing the excavation process of the foundation excavation of South Square project of Hefei South Station,the risk of settlement and displacement of the tunnel adjacent to Hefei Subway Line 1 is caused by the construction of the foundation excavation. Effective measures such as systematic evaluation,monitoring and management are taken to discuss the successful experience of the foundation excavation of the project in dealing with the subway risk. According to the characteristics of the foundation excavation itself,taking deformation control as the core,considering various factors and combining with the numerical simulation of the excavation process of the foundation excavation,the construction organization design scheme of the shield tunneling area adjacent to the subway is formulated,and the local adjustment is made according to the actual situation in the construction process to ensure the safety of the foundation excavation project.