深厚软土地层盾构施工诱发地层应力扰动规律研究

STUDY ON THE LAW OF GROUND STRESS DISTURBANCE INDUCED BY SHIELD CONSTRUCTION IN DEEP SOFT SOIL LAYER

为了分析超软土地层扰动对盾构掘进过程的影响,研究在PLAXIS 3D中编写了子程序,并建立了盾构掘进的三维有限元模型,用于指导实际工程中的盾构掘进。使用模型中的结构强度参数作为评价指标,建立了评价盾构掘进引起土体扰动的方法。研究以某隧道为例,对盾构推进过程中土体扰动进行了分析。

In order to study the influence of ultra-soft soil layer disturbance on shield tunneling process,a subroutine was written in PLAXIS 3D,and a three-dimensional finite element model of shield tunneling was established,and a three-dimensional finite element model was established for shield tunneling.Using the structural strength parameter in the model as an evaluation index,a method for evaluating soil disturbance caused by shield tunneling is established.Taking a tunnel as an example,the disturbance of soil mass in the process of shield tunneling is analyzed.