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针对北京地铁10号线国贸桥地铁站换乘通道的设计和施工方案,采用有限差分数值模拟方法对不同方案下地铁车站换乘通道暗挖施工过程中上部既有桩基的受力特性及位移变化规律进行模拟,据以制定合理的施工方案。研究结果表明:在不对桥桩采取加固措施的情况下,地表沉降量和桥桩沉降量均较大,桥基承载力损失严重,严重影响到桥桩的稳定性。因此,在换乘通道开挖过程中,必须采取相应的工程加固措施来确保桥桩的稳定。
Aiming at the design and construction of the transfer passageway of Guomaoqiao Subway Station on Beijing Metro Line 10, the finite difference numerical simulation method is used to analyze the mechanical characteristics and displacement of the upper existing foundation during the underground excavation of transfer station under different schemes Changes in the law to simulate, so as to formulate a reasonable construction program. The results show that under the condition of not strengthening the bridge piles, the settlement of the ground and the settlement of the bridge piles are large, the bearing capacity of the bridge foundation is seriously damaged, which seriously affects the stability of the piles. Therefore, during the excavation of transfer passage, corresponding engineering reinforcement measures must be taken to ensure the stability of bridge piles.