中南大学学报（自然科学版）2013，Vol.44Issue(7)：2934-2941,8.
盾构施工对黄土地层的扰动及管片衬砌受荷特征
Soil disturbance caused by shield tunneling and segment lining loading characteristics in loess strata
摘要
Abstract
In order to investigate the soil disturbance caused by shield tunnel construction and loading characteristics of segment lining structure in loess strata,based on the Xi'an Metro Line 2 shield tunnel passing through loess strata project,particle distinct element method had been used to simulate the vibration of ground stress and working face failure form from the meso-level.Meanwhile,dynamic tracking tests of earth pressure and structure internal force (axial force and bending moment) acting on the segment lining had been conducted to analyze the influences of earth pressure on the internal forces of segment ling during construction and later stabilization of shield tunneling.The results show that the horizontal and vertical stresses have a significant change on the top and both sides of the tunnel because of the generation of free face.Construction parameters play an important role in the internal forces of segment lining structure,especially the jack thrust and grouting pressure.关键词
盾构施工/黄土地层/土体扰动/颗粒离散元/现场试验Key words
shield tunneling/ loess strata/ soil disturbance/ particle distinct element method/ field test分类
交通工程引用本文复制引用
江英超,何川,方勇,周济民..盾构施工对黄土地层的扰动及管片衬砌受荷特征[J].中南大学学报（自然科学版）,2013,44(7):2934-2941,8.基金项目
国家重点基础研究发展计划("973"计划)项目(2010CB732105) （"973"计划）
高铁联合基金重点资助项目(U1134208) （U1134208）
国家自然科学基金资助项目(50925830,50908193) （50925830,50908193）
