岩土工程学报2011，Vol.33Issue(4)：667-672,6.
开挖对边坡变形影响的离心模型试验研究
Centrifugal model tests on excavation-induced deformation of slopes
摘要
Abstract
The problems induced by slope excavations are quite common in practice.Centrifugal model tests are conducted to investigate behaviors of cohesive slopes under excavation conditions using the excavation simulation devices on the centrifuge of Tsinghua University.The displacement fields are measured during excavation.A method is proposed to identify the excavation influence areas during excavation basing on the displacement measurements, and the deformation of a slope is also analyzed.The results show that the slope can be divided into three areas with different deformation features: excavation-induced relaxation area, excavation-induced compression area and non-influence area, in which the vertical strains are negative, positive and almost zero, respectively.Meanwhile, the potential slip surface moves during the process of deformation, which gradually spreads from the inner to the slope surface after excavation.The excavation causes a significantly progressive failure of the slope.关键词
边坡/开挖/变形/离心模型试验Key words
slope/ excavation/ deformation/ centrifugal model test分类
建筑与水利引用本文复制引用
李明,张嘎,李焯芬,张建民..开挖对边坡变形影响的离心模型试验研究[J].岩土工程学报,2011,33(4):667-672,6.基金项目
973课题项目(2007CB714108) （2007CB714108）
国家自然科学基金项目(50778105) （50778105）
