岩土工程学报2012，Vol.34Issue(7)：1176-1183,8.
基坑开挖过程中TJ-1模拟月壤变形特性的试验研究
Deformation behaviors of T J-1 lunar soil simulant during excavation
摘要
Abstract
Torsion shear tests are conducted by use of a dynamic hollow cylinder apparatus in Tongji University on the T J-1 lunar soil simulant subjected to stress paths of excavation in order to investigate its deformation behaviors and non-coaxiality during the excavation under the earth environment. The test results indicate that （1） the stress path significantly affects the deformation behaviors of the TJ-1 lunar soil simulant; （2） the soils at the bottom of the pit and outside the diaphragm walls fail due to large deformation; （3） the soils at the bottom exhibit a tendency of contraction; （4） the soils adjacent to the diaphragm walls show remarkable non-coaxiality due to the coupled effects of stress ratio, rotation amplitude and rotation rate of the principal stress; and （5） the non-coaxiality of soils at the bottom of the pit is mainly affected by the rotation amplitude and rotation rate of the principal stress direction, while the non-coaxiality of soils outside the wall is controlled by the stress ratio, rotation amplitude and rotation rate of the principal stress direction.关键词
TJ-1模拟月壤/基坑开挖/应力路径/空心圆柱扭剪仪/变形特性/非共轴Key words
TJ-1 lunar soil simulant/excavation/stress path/hollow cylinder apparatus/deformation behavior/non-coaxiality分类
建筑与水利引用本文复制引用
蒋明镜,李立青,刘芳,苏佳兴..基坑开挖过程中TJ-1模拟月壤变形特性的试验研究[J].岩土工程学报,2012,34(7):1176-1183,8.基金项目
国家杰出青年基金项目 （）
国家自然科学基金项目 （）
上海市优秀学术带头人计划 （）
