紧邻地铁车站深基坑支护设计分析

Design and analysis of deepfoundation pit support close to subway station

临近既有地铁车站的地下空间开发日益增多,采用合理有效的深基坑支护设计方案,对地铁车站结构的保护尤为重要。以杭州某工程为依托,对双侧紧邻地铁车站的基坑,采取车站两侧对称卸土,利用地铁围护结构设计支撑,基坑分块开挖等设计手段,采用启明星计算软件并利用Plaxis有限元软件进行数值模拟,结果表明文中采取的设计方案可有效控制地铁车站变形,满足对地铁车站保护的要求。

The development of underground space close to existing subway station is increasing day by day.It is very important to protect the structure of subway station by adopting reasonable and effective support design scheme for deep foundation pit.Based on a project in Hangzhou,the foundation pit adjacent to the subway station on both sides is unloaded symmetrically on both sides of the station,supported by the design of subway enclosure structure,excavation of foundation pit in blocks and other design schemes.The numerical simulation is carried out by using Qimingxing calculation software and Plaxis finite element software.The results show that the design scheme adopted in this paper can effectively control the deformation of the subway station and meet the requirements for the protection of the subway station.