非饱和膨胀土的三轴试验研究

非饱和膨胀土的三轴试验研究 English Version

江苏交通规划设计院!南京；210005；南京市建设发展总公司!南京；210009；东南大学交通学院!南京；210096；河海大学岩土工程研究所!南京；210098；

The Institute of Communication of Planning and Design of Jiangsu Nanjing General Corporation of Nanjing Construction Development Nanjing The College of Traffic Engineering Southeast University.Nanjing

摘要: 用改装可测吸力的三轴仪，研究了宁夏膨胀上的变形性质和强度特性。试验结果表明，含水量（吸力）决定了上样的变形行为，并影响了土样的强度；随着含水量增加，土样的塑性应变量增加，强度减小。文中还研究了随吸力的变化规律及非地和上强度理论中的状态变量的选取方法。
- 非饱和土 /
- 膨胀土 /
- 三轴试验 /
- 吸力
Abstract: The deformation behavior and strength characteristics of unsaturated expansive soils are studied by using modified triaxial apparatus.It is shown that defomation behavior and strength characteristics are affected by water content (suction)of unsaturated expansive soils.The plastic axial strain increases and strength decreases as water content increases.The relation between and suction is studied in this paper, and a new stress state variable for strength of unsaturated expansive soils is presented.
- unsaturated soil /
- expansive soil /
- traxial testing /
- suction