岩土力学Issue(z2)：115-120,6.
陕西蒲城Q2黄土湿陷变形特性研究
Collapsible deformation properties of Q2 loess in Pucheng of Shaanxi province
摘要
Abstract
A series of collapsibility tests on Q2 loess of Pucheng power plant in Shaanxi province under 1D and 3D stress conditions were conducted using GDG high pressure oedometer and unsaturated collapsible triaxial apparatus. Under 1D stress condition, the collapsibility of Q2 loess is moderate or weak. The maximum coefficient of collapsibility decreases with the increase of depth. The Q2 loess is not collapsible under low pressure, but it is possibly collapsible under high pressure. The collapsibility of Q2 loess layer is stronger than that of ancient layer. The collapsibility sensibility of Q2 loess is weaker. Large-scale projects should use actual pressure to evaluate collapsibility of Q2 loess. Under 3D stress condition, curves of collapsible strain in terms of quantity of wetting are divided into three stages:the collapsible strain increasing slightly, the collapsible strain increasing rapidly and the collapsible strain being almost unchanged. The influences of net confining pressure, deviatoric stress and suction, especially the latter two, on the collapsible strain during the process of wetting are obvious. The collapsible volumetric strain increases with the increase in the collapsible deviatoric strain and the relationship is almost linear.关键词
Q2黄土/浸水/三轴/湿陷性Key words
Q2 loess/wetting/triaxial/collapsibility分类
建筑与水利引用本文复制引用
方祥位,申春妮,李春海,汪龙,刘厚健..陕西蒲城Q2黄土湿陷变形特性研究[J].岩土力学,2013,(z2):115-120,6.基金项目
国家自然科学基金项目（No.11272354）；后勤工程学院学术创新项目（No.YZ11-42201）；国家科技支撑计划项目（No.2012BAK05B00）。 （）
