隧道盾构法掘进触发二次地应力分布规律研究

Redistribution of secondary earth stress produced by shield tunneling

以拟建哈尔滨市松花江隧道为例 ,采用因子对目标函数影响的优化分析思想 ,直接针对隧道施工过程 ,在各种不同工况下 ,建立尽可能逼近实际问题的有限元数值计算模型 ,通过大量的反复数值模拟实验 ,研究因盾构掘进在土体中触发二次地应力的分布规律 ,总结各单项因子对土体变形力学性状的影响特性 ,预估隧道周围土体最危险破坏点位置 。

With the Songhuajiang tunnel built in Harbin as an example, both the optimization analysis and the finite element numerical analysis are used to simulate different cases and site conditions, and the redistribution of secondary earth stress produced by shield tunneling is studied through numerical simulating experiments to evaluate the influence of various factors on the soil deformation and to identify the most dangerous failure location beforehand.