防灾减灾工程学报2017，Vol.37Issue(4)：689-696,8.DOI:10.13409/j.cnki.jdpme.2017.04.026
吸力在非饱和强度理论计算中的探索性试验分析
Exploratory Study on the Role of Suction in Unsaturated Strength Theory Analysis
摘要
Abstract
A simplified strength equation based on physical parameters is desired to study the strength of Nanning unsaturated slight expansive soil.A series of laboratory tests,such as compaction test,free swelling ratio test,triaxial compression test and expansive force tests,were conducted to study the unsaturated behavior of the slight expansive soil,which attained the relationship between the suction strength and the expansive force with different moisture contents.The results suggest:the stress strength of such soil decreases as the moisture content increases,and the relationship between the suction strength and the expansive force can be described using an exponential function.From the points of moisture content and suction strength,a predicted strength equation of Nanning slight expansive soil is established,where the expansive force works as the variable.This equation can predict stress strength well,and it maybe provides a new method for the analysis of unsaturated strength.关键词
吸力/非饱和土/膨胀力/吸附强度/抗剪强度理论Key words
suction/unsaturated soil/expansion force/adsorption/shear strength theory分类
建筑与水利引用本文复制引用
张金存,程谦恭,苏国锋,李星,罗浩..吸力在非饱和强度理论计算中的探索性试验分析[J].防灾减灾工程学报,2017,37(4):689-696,8.基金项目
国家自然科学基金项目(41530639,41172260)、四川省科技计划项目(2010JY0066)资助 （41530639,41172260）
