3D Finite Element Simulation of Tunnel Boring Machine Construction Processes in Deep Water Conveyance Tunnel  

作　　者：钟登华 佟大威 

机构地区：[1]School of Civil Engineering,Tianjin University

出　　处：《Transactions of Tianjin University》2009年第2期101-107,共7页天津大学学报（英文版）

基　　金：Supported by National Natural Science Foundation of China(No.90815019);National Key Basic Research Program of China("973" Program,No.2007CB714101);Key Project in the National Science and Technology Pillar Program during the Eleventh Five-Year Plan Period(No.2006BAB04A13)

摘　　要：Applying stiffness migration method,a 3D finite element mechanical model is established to simulate the excavation and advance processes.By using 3D nonlinear finite element method,the tunnel boring machine(TBM) excavation process is dynamically simulated to analyze the stress and strain field status of surrounding rock and segment.The maximum tensile stress of segment ring caused by tunnel construction mainly lies in arch bottom and presents zonal distribution.The stress increases slightly and limitedly in the course of excavation.The maximum and minimum displacements of segment,manifesting as zonal distribution,distribute in arch bottom and vault respectively.The displacements slightly increase with the advance of TBM and gradually tend to stability.Applying stiffness migration method, a 3D finite element mechanical model is established to simulate the excavation and advance processes. By using 3D nonlinear finite element method, the tunnel boring machine （TBM） excavation process is dynamically simulated to analyze the stress and strain field, status of surrounding rock and segment. The maximum tensile stress of segment ring caused by tunnel construction mainly lies in arch bottom and presents zonal distribution. The stress increases slightly and limitedly in the course of excavation. The maximum and minimum displacements of segment, manifesting as zonal distribution, distribute in arch bottom and vault respectively. The displacements slightly increase with the advance of TBM and gradually tend to stability.

关 键 词：water conveyance tunnel tunnel boring machine CONSTRUCTION 3D finite element method numerical analysis SIMULATION 

分 类 号：TV554.2[水利工程—水利水电工程]