土工基础

›› 2017, Vol. 31 ›› Issue (3): 282-286.

• 工程实录 • 上一篇    下一篇

浅埋大跨黄土隧道施工过程数值模拟及位移监测

孙星亮1，陈智慧2   

  1. （1.石家庄铁道大学土木学院，石家庄 050043；2.中铁第四勘察设计院集团有限公司，武汉 430063）
  • 收稿日期:2016-04-21 修回日期:2016-05-18 出版日期:2017-06-25 发布日期:2017-06-26
  • 作者简介:孙星亮（1970-），男，教授，研究方向为软弱围岩隧道施工力学及加固技术。

Numerical Analysis of the Construction Sequence of the Shallow Buried Large Cross Section Tunnel and the Field Monitoring of Ground Movement

SUN Xingliang1， CHEN Zhihui2   

  1. (1.School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043；
    2.China Railway Siyuan Survey and Design Institute Group Ltd., Wuhan 430063)
  • Received:2016-04-21 Revised:2016-05-18 Online:2017-06-25 Published:2017-06-26

摘要： 以洛阳周山大跨度黄土隧道浅埋段为工程背景，建立三维数值模型对施工过程地层变形及支护受力进行分析，结果表明：地层中的水平位移与其沉降位移相比量值较小。地层中位移大部分发生在支护封闭之前阶段，拱顶和地表沉降在支护封闭之前的位移分别占其总位移的81.5%和70.5%。支护结构最大拉应力在拱顶，且在支护闭合以后迅速增长并很快趋于稳定。在隧道施工过程中进行了地中竖直及水平位移监测，基本规律与计算结果较为一致。

关键词: 浅埋大跨隧道, 地中位移, 数值分析, 现场监测

Abstract: This paper presents a case history of the design and construction of a Luoyang Zhoushan shallow buried large cross section tunnel in loess soil strata. A three dimensional numerical analysis model was established to simulate the soil deformation and the stress in the supporting structures during the tunnel excavation. The results indicate that, the magnitude of the horizontal movement in the soil mass is smaller than the vertical subsidence value. The majority of the soil movements occurred before the supporting structures are engaged. The deformations at the tunnel crest and the ground surface subsidence before the engaging of the supporting structures are 81.5% and 70.5%, respectively. The maximum stress in supporting structure is at the tunnel crest and the stress was rapidly stable after the engaging of the supporting structure. The vertical and horizontal deformation monitoring results are consistent with the predicted values.

Key words: Shallow Buried Large Cross Section Tunnel, Ground Movement, Numerical Analysis, Field Monitoring