Nonlinear rheological analysis on tunnel displacement induced by adjacent excavation in soft clay

被引：0

作者：

Zhang, Junfeng ^{[1
]}

Wang, Jianhua ^{[1
]}

Wen, Suolin ^{[2
]}

机构：

[1] Civil Engineering Department, Shanghai Jiaotong University, Shanghai 200240, China

[2] Shanghai Tunnel Engineering Co. Ltd., Shanghai 200082, China

来源：

Tumu Jianzhu yu Huanjing Gongcheng/Journal of Civil, Architectural and Environmental Engineering | 2012年 / 34卷 / 03期

关键词：

Deformation - Excavation - Soils - Viscoelasticity - Nonlinear analysis;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Deep excavation in soft clay often brings soil stress disturbance and soil deformation, which would bring differential settlement and structural cracks. It probably brings safety problems to adjacent underground tunnels. Therefore, it is necessary to predict tunnel displacement induced by excavation for tunnel's security. A new method was proposed to estimate the heave of underlying tunnel induced by adjacent excavation verified by field measurements. The soil deformation by excavated soil gravity was analyzed by application of Boussinesq solution. The soil deformation by tunnel surface pressure was analyzed by Mindlin solution. The tunnel was assumed to be an elastic beam on foundation to simulate the tunnel, in which interaction analysis of tunnel and soil was employed. In consideration of rheologic soil, Viscoelastic model was employed to analyze soil nonlinear displacement with time in soft clay. Tunnel displacements were discussed by different excavation cases. A case study showed a good agreement between the results from the prediction and the measurement.

引用

页码：10 / 15