土工基础

›› 2014, Vol. 28 ›› Issue (1): 14-16.

• 工程实录 • 上一篇    下一篇

西安地铁盾构施工引起地表沉降的预测

 张 凯   

  1. （西安建筑科技大学,西安 710055）
  • 收稿日期:2013-04-03 出版日期:2014-02-20 发布日期:2014-02-27
  • 作者简介:张凯（1988- ），男，陕西西安人，硕士研究生，研究方向为隧道工程及数值仿真。

Prediction of Ground Subsidence Induced by the Shielded Subway Construction in Xi'an

ZHANG Kai   

  1. （Xi'an University of Architecture and Technology, Xi 'an 710055）
  • Received:2013-04-03 Online:2014-02-20 Published:2014-02-27

摘要： 以西安地铁二号线南门城墙段盾构施工为例，利用FLAC 3D模拟隧道施工过程，对土体抗剪强度参数、隧道埋深及上部城墙等因素的变化引起的地表沉降作量化分析和规律性研究，并提出了预测公式，能较好的反映盾构施工引起的地表沉降，具有一定的工程意义和实用价值。

关键词: 盾构施工, 地表沉降, FLAC 3D, 摩尔-库伦模型

Abstract: The South Gate Wall segment of the second line of Xi'an Subway project is constructed with shielded tunneling method. The impact of the tunnel excavation on the ground surface subsidence is simulated with FLAC 3D model with various soil shear strength parameters, tunnel embedment depths as well as thickness of the Gate Wall. From the numerical analysis, the ground subsidence prediction formula is proposed. It is concluded that the proposed ground subsidence formula can reasonably reflect the values that observed during the construction.

Key words: shielded tunneling, ground subsidence, FLAC 3D, mohrcoulomb model