岩土力学Issue(10)：2763-2768,2809,7.
圆柱孔破损膨胀土强度和变形特性的CT-三轴试验研究
Study of strength and deformation of cylindrical hole damaged expansive soil by CT-triaxial test
摘要
Abstract
The properties of deformation, strength and structural evolution of cylindrical hole damaged expansive soil are investigated by eight CT-triaxial tests. The results show that the strength of the samples with the cylindrical holes is significantly weakened because of the hole damage. Howerver, the hole size has little influence on the strength of the sample. The hole section area decreases when net confining pressure increases under a certain suction. The reduction of the hole section area is more obvious when the suction is larger under the same net confining pressure. Moreover, the net confining pressure plays an important role on the structural evolution of the cylindrical holes in the remolded expansive soils. The increment of the mean value (ME value) is enhanced gradually when the net confining pressure is changed from 50 kPa to 200 kPa. It means the sample becomes denser when the confining pressure is larger. Accordingly, the decrement of the standard deviation (SD value) increases gradually. The structure of the sample becomes homogenized during the test.关键词
膨胀土/CT-三轴试验/圆柱孔破损/结构演化/弱化Key words
expansive soil/CT-triaxial test/cylindrical hole damage/structural evolution/weakening分类
建筑与水利引用本文复制引用
汪时机,韩毅,李贤,石朗晶,张雅倩,陈正汉..圆柱孔破损膨胀土强度和变形特性的CT-三轴试验研究[J].岩土力学,2013,(10):2763-2768,2809,7.基金项目
国家自然科学基金项目资助（No.10902091）；中央高校基本科研业务费专项资金资助（No. XDJK2013C042，No. XDJK2010C014）。 （）
