文档介绍：西安地铁盾构施工引起地表沉降规律分析
王璐1 刘晓文2
(,西安,710025;,天津,300017)
摘要:本文结合黄土地区的特殊性对西安地铁施工引起的地表沉降的影响因素进行了初步探讨,根据有关勘测资料,采用三维数值模拟软件FLAC3D对盾构推进过程进行了模拟,以西安地铁2号线工程为背景,对开挖引起的地表沉降规律进行了分析研究。主要包括:隧道纵向沉降分布规律、黄土特性对盾构法施工中地表沉降的影响、地表沉降与黄土层覆土厚度的关系等。研究了黄土特性对盾构法施工中土体变形的影响,从而得出了黄土地区地表沉降的一般规律。
关键词:盾构施工;数值模拟;地表沉降;黄土特性
中图分类号:TV434 文献标识码:A
Analysis on the Law of Ground Surface Settlement Induced by Shield Construction in Xi’An
Wang Lu1,Liu xiaowen2
(1. North Institute of Information Engineering, Xi'an Technological University, Xi'an, 710025
2. Tianjin Urban Construction Design Institute ,Tianjin, 730050)
Abstract: The paper summarizes ground settlements influencing factors, characteristic of ground settlements in Xi’an tunnel. The mechanics of surface settlement induced by shied construction is generalized systematically. The disturbance of soil caused by shield tunnel construction results in the soil movement, mainly the ground settlement, which is one of the problem highly concerned in the design and construction process of shield tunneling. Shield tunneling is simulated by a finite difference code FLAC3D according to survey information. Then, the characteristic of ground settlement is studied on the basis bination of the measured data of Xi’an Subway Line and the result of numerical analysis. It generally analyzes the characteristic of ground settlement on lateral section