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针对苏州软土地区的某深大基坑施工对邻近已运营地铁隧道的影响进行了研究。从方案优化的角度出发,提出了相应的保护措施,包含设计方案优化及施工方案优化。反演分析得到了邻近基坑项目基坑土及地层的本构模型计算参数,并应用于有限元模拟预测基坑施工全过程对隧道结构影响的分析过程中。数值分析结果表明:提出的深大基坑施工对隧道结构的保护措施有效,施工对隧道结构的影响在可控范围之内。为今后类似工程的处理方案提供了优化思路。
Aimed at the construction of a deep foundation pit in the soft soil area of Suzhou, the influence on the operation of the adjacent subway tunnel has been studied. From the perspective of program optimization, the corresponding protection measures are proposed, including the optimization of the design scheme and the optimization of the construction scheme. The constitutive model parameters of foundation pit soil and formation near the foundation pit are obtained by inversion analysis and applied in the process of finite element simulation to predict the influence of the whole process of foundation pit on the tunnel structure. Numerical analysis results show that the proposed deep foundation pit construction is effective for the protection of tunnel structures and the impact of construction on the tunnel structure is within the controllable range. For the future similar projects to provide solutions to optimize the idea.