农业工程学报2012，Vol.28Issue(7)：150-154,5.DOI:10.3969/j.issn.1002-6819.2012.07.025
土体孔洞损伤结构演化及其力学特性的CT-三轴试验研究
Pore-damage evolution and mechanical properties of remolded soil by CT-triaxial test
摘要
Abstract
In order to assess the influence of pore-damage on the strength, the deformation and the stability of soils, five samples, including four samples with pore-damage and one damage-free sample, were analysed using CT(Computed Tomography)-triaxial testing apparatus under the controlled constant confining pressure and suction. The evolution of pore-damage and the mechanical properties of the samples were studied in this paper. Results showed that the volume of sample and the area of the pore reduced during testing. The shear strengths of the pore-damaged samples were improved 25 per cent under the condition of favorable moisture when the diameter of damage pore was 3 mm. The volumetric strains of pore-damaged samples were less than that of the damage-free sample. The shear strengths of the samples were identical when the areas of the damaged pores were similar. However, the volumetric strains were different even though the areas of the damaged pores were the same.关键词
土壤/孔洞结构/抗剪强度/演化/体积应变/CT-三轴试验Key words
soils/pore structure/shear strength/evolution/volumetric strain/CT-triaxial test分类
建筑与水利引用本文复制引用
汪时机,陈正汉,李贤,彭贞,袁军..土体孔洞损伤结构演化及其力学特性的CT-三轴试验研究[J].农业工程学报,2012,28(7):150-154,5.基金项目
国家自然科学基金项目资助(10902091),中央高校基本科研业务费专项资金资助(XDJK2010C014),重庆市自然科学基金资助(2009BB8114) （10902091）
