近接城市地铁隧道的深基坑支护结构设计研究

Study on Design of Deep Foundation Pit Support Structure Close to Urban Subway Tunnel

为优化近接城市地铁隧道的深基坑结构设计,建立数值模型分析有无地铁隧道情况下的基坑结构支护土压力变化,进一步分析了地铁隧道与基坑支护结构近接距离对土压力系数、土压力合力及支护土压力的影响作用机理,进而实现对基坑支护结构的优化设计。

In order to optimize the structural design of deep foundation pit close to urban subway tunnel,a numerical model is established to analyze the change of earth pressure of foundation pit structure with or without subway tunnel.The influence mechanism of the close distance between subway tunnel and foundation pit support structure on earth pressure coefficient,earth pressure resultant force and supporting earth pressure is further analyzed,so as to realize the optimization design of foundation pit support structure.