摘要
天然土的结构性、各向异性对其强度有影响.进行固结压力100kPa、主应力轴恒定偏转角为0°,15°,30°,45°,60°的恒定主应力轴偏转角的固结不排水剪切试验,分析了不同恒定主应力轴偏转角对饱和软黏土固结不排水剪切强度影响;推导了总应力控制恒定主应力轴偏转角剪切试验总应力路径,编制了总应力控制剪切三维点积分程序,对比恒定主应力轴偏转角饱和软黏土固结不排水剪切强度计算值与试验结果,表明程序能很好地反应各向异性对土剪切强度影响.
The strength of a natural clay is affected by its structure and anisotropy. The consolidated-undrained shear test with a constant principal stress axis deflection angle is conducted, where the consolidation pressure is 100kPa and the constant deflection angle of the principal stress axis is 0°, 15° 30°, 45° and 60°. And the influences of different constant principal stress axis deflect, ion angles on the consolidated-undrained shear strength and the cumulative pore pressure of the saturated soft clay are analyzed. The total stress path of the tota,1 stress-controlled constant principa,1 stress axis deflection angle shear test is derived. The imegration program of the total stress-controlled shear three-dimensional point is developed. By comparing the calculated and test results of the shear strength at the constant principal stress axis deflection angle of the saturated soft clay under consolidated-undrained conditions, it is shown that the influence of the anisotropy on the shear strength of the soil is well revealed.
出处
《力学与实践》
北大核心
2016年第1期56-62,共7页
Mechanics in Engineering
基金
安徽省自然科学基金项目(1408085ME79)
安徽高等学校自然科学基金重点项目(KJ2012A072)
国家博士后基金项目(2013M531493)
住房和城乡建设部项目(2012-R3-12)
安徽省住房和城乡建设厅项目(2012YF-25)资助
关键词
恒定主应力轴
不排水剪切强度
点积分
eonstant deflection angle of principal stress axis, undrained shear strength, point integration
