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结合具体工程实例,利用有限元分析方法对邻近地铁隧道的基坑围护变形控制要求进行研究。分析结果表明:针对不同的围护结构变形控制标准,地铁隧道结构的位移量亦随之发生变化。当围护结构位移值达到40mm时,隧道结构的位移将达到甚至超过地铁隧道的变形控制限值;当围护结构的变形值达到20mm时,隧道结构的位移相对较小,可更为有效地保护隧道结构的安全。
Combined with specific engineering examples, the finite element analysis method is used to study the deformation control requirements of the foundation pit surrounding the subway tunnel. The analysis results show that the displacement of the metro tunnel structure also varies with different control standards for the deformation of the envelope. When the displacement of the retaining structure reaches 40mm, the displacement of the tunnel structure will reach or even exceed the deformation control limit of the subway tunnel. When the deformation value of the retaining structure reaches 20mm, the displacement of the tunnel structure is relatively small, and it is more effective Protect the safety of the tunnel structure.