岩土力学Issue(4)：1141-1146,6.
基于固定主应力轴假设的砂堆基底应力凹陷的研究
Study of depression of stress on base of sand prism based on fixed principal axes assumption
摘要
Abstract
This paper focuses on the basal stress distribution and depression of stress of sand prism. The sand prism is divided into a stress known zone I and a stress unknown zone II based on the fixed principal axes (FPA) assumption. On several shear stress distribution assumptions, the stress state of zone II is available. The values of coefficient of earth pressure at rest on the sand centerline on different shear stress distribution assumptions are compared to the one proposed by Kulhawy. The following results are achieved;there is depression of normal stress on the base of sand prism, and the larger of the friction angle (the denser the sand prism) is, the more the depression of normal stress is; and the larger of the depression range is; the shape of the stress distribution and minimum value of normal stress and the location of the minimum normal stress are different on different assumptions; and the assumption of quadratic distribution and cubic distribution of shear stress are most reasonable.关键词
基底应力分布/FPA假设/应力凹陷/剪应力分布假设Key words
basal stress distribution/FPA assumption/depression of stress/shear stress distribution assumption分类
建筑与水利引用本文复制引用
毕港,韦健飞,周蕾..基于固定主应力轴假设的砂堆基底应力凹陷的研究[J].岩土力学,2014,(4):1141-1146,6.基金项目
广西科学研究与技术开发项目(No.桂科金0136019)。 （No.桂科金0136019）
