水文地质工程地质2016，Vol.43Issue(3)：87-93,7.DOI:10.16030/j.cnki.issn.1000-3665.2016.03.14
改良膨胀土胀缩裂隙及与抗剪强度的关系研究
A study of the swelling shrinkage cracks of the modified expansive soil and its relationship with the shear strength
摘要
Abstract
To study the development characteristics of the improved expansive soil fissure and its effect on the shear strength,the saturated wet dry cycle is conducted for the expansive soil with different mix proportion of lime and weathered sand.The image processing technology is used to extract the surface crack fracture parameters from the soil images,and the saturated shear strength of soil is tested.The results show that the lime and weathered sand can effectively restrict the development of cracks.The crack rate increases linearly with the increasing number of cycles,and the cohesive force and internal friction angle of the modified expansive soil increase with the increasing number of cycles.There is a good exponential function relationship between the crack rate and the cohesive force,and the logarithmic function relationship exists between the internal friction angle and the crack rate of the modified soil.Combination of the fracture index is more reasonable to evaluate the improvement effect of the expansive soil.关键词
改良膨胀土/胀缩裂隙/抗剪强度/裂隙率Key words
modified expansive soil/swelling and shrinkage crack/hear strength/fracture rate分类
土木建筑引用本文复制引用
黄震,陈铖..改良膨胀土胀缩裂隙及与抗剪强度的关系研究[J].水文地质工程地质,2016,43(3):87-93,7.基金项目
国家自然科学重点基金项目资助(51538009) （51538009）
国家自然科学基金项目资助(41372314) （41372314）
