土工基础

土工基础 ›› 2020, Vol. 34 ›› Issue (5): 575-579.

• 专题论述 • 上一篇    下一篇

TBM隧道斜交下穿城市立交桥的弹塑性数值计算分析

孙 杰1，武 科1，郑 杨1，韩宇聪1，朱仁军2，郝梦雪2   

  1. （1.山东大学土建与水利学院，济南 250061；2.东北电力大学，吉林 132012）
  • 收稿日期:2019-10-29 修回日期:2019-11-14 出版日期:2020-10-20 发布日期:2020-11-02
  • 作者简介:孙 杰（1995-），男，硕士研究生，研究方向为城市地下空间。
  • 基金资助:
    山东省自然科学基金(ZR2017MEE051)，山东省重点研发计划（公益类专项）项目(2018GHY115015)

Elastoplastic Numerical Analysis of A TBM Excavated Tunnel Skewed Undercrossing an Urban Viaduct

SUN Jie1, WU Ke1, ZHENG Yang1, HAN Yucong1, ZHU Renjun2, HAO Mengxue2   

  1. (1.School of Civil Engineering, Shandong University, Jinan 25006; 2.Northeast Electric Power University, Jilin 132012)
  • Received:2019-10-29 Revised:2019-11-14 Online:2020-10-20 Published:2020-11-02

摘要： TBM在开挖隧道过程中不可避免地会引起地层初始应力场的改变，导致开挖面围岩的扰动与变形。依托青岛地铁1号线地铁隧道下穿市北区人民路立交桥工程，采用弹塑性数值计算分析方法，建立TBM隧道斜交下穿城市立交桥三维力学计算模型，开展城市地铁隧道下穿既有市政桥梁施工过程模拟，研究TBM隧道斜交下穿城市立交桥施工过程中隧道拱顶和既有桥梁桩基的沉降规律，揭示TBM隧道掘进引起周围岩体的损伤破坏发生、发展过程；通过对比分析隧道及围岩的应力变化、塑性区破坏模式以及位移矢量等信息，预判隧道围岩破碎带的发展趋势，为工程建设提供重要参考依据。

关键词: TBM, 隧道工程；下穿桥梁；弹塑性分析

Abstract: During the tunnel excavation using Tunnel Boring Machine (TBM), the initial geostress field will be changed. This change of geo-stress results in the rock mass disturbance and deforming at the face of excavation and then induces the ground subsidence. This paper presents the a threedimensional elasto-plastic numerical simulation of the TBM excavated tunnel for No.1 Line of Qingdao Metro that skewed undercrossing the urban viaduct at Renmin Road of Shibei District. The process of tunnel excavation on the urban municipal bridge above is simulated with the focus on the deformations at top of tunnel and the pile supported foundation of the viaduct structure. Further, the breakage and deformation surrounding rock mass at the TBM excavation face was also simulated and the rock stress changes as well as the development of plastic zone were also compared so that the broken zone of the rock mass can be predicted.

Key words: Tunnel Boring Machine, Tunnel Engineering, Undercrossing a Viaduct, Elastoplastic Analysis

中图分类号: