Approximate Theoretical Analysis on Excavation Disturbed Zone of a Soft Rock Slope in Suining-Ziyang Expressway Engineering in Southwestern China
A curing slope model can be simplified as plane strain one,the stress field of cutting slope can be analyzed with elastic wedge body theory.By using strength criterion of slope material (Mohr-Coulomb strength criterion with safety reserve and uniaxial tensile strength criterion),the disturbed zone caused by excavation can be calculated in 3D stress state,so all the disturbed zone after each step of excavation from the top down can be searched out.The main analysis steps for judging disturbed zone are described in the paper,including the methods to calculate the stress state of curing slope,the unloading value and the scope of disturbed zone after last step of excavation.Finally,an example in Suining-Ziyang expressway engineering is chosen to explain detailedly the analytical process with elastic wedge body theory to determine the disturbed zone.
Soft rock slope Excavation disturbed zone Safety factor
Cao Xingsong Hu Yayun Liu Shixiong
Chongqing Construction Engineering Group Sichuan Suining-Ziyang Expressway Co.Ltd.,Suining,China,629 Department of Geological Engineering,Southwest Jiaotong University,Chengdu,China,610031
国际会议
西安
英文
476-481
2013-07-27（万方平台首次上网日期，不代表论文的发表时间）