论文部分内容阅读
在岩土工程勘察取样过程中,取土管的贯入会引起土体的扰动变形,影响到对土体物理力学性质的准确评价。为了研究取土管贯入过程中土体扰动变形特性,基于透明土及PIV技术,开发了相应的取土管贯入模型试验系统,进行了取土管的贯入试验,得到了在取土管贯入过程中土体扰动变形场的分布特性。试验结果表明:土体扰动变形随着取土管贯入深度增大而增大,管外土体主要表现为斜向上的隆起变形;管内土体主要为向上的隆起变形,在深度方向最大变形位于取土管中间部位;不同截面处土体其变形规律基本一致,截面间土体剪切变形较小。
During the process of geotechnical investigation and sampling, the penetration of soil-taking pipe will cause disturbances and deformations of the soil, affecting the accurate evaluation of the physical and mechanical properties of the soil. In order to study the disturbance and deformation characteristics of soil during soil penetration, a corresponding soil penetration test system was developed based on transparent soil and PIV technology. The soil penetration test was carried out. DISTRIBUTION CHARACTERISTICS OF DISTURBING DEFORMATION FIELD OF MEDIUM AND SOIL. The experimental results show that the disturbance of soil mass increases with the penetration depth of soil-taking pipe. The soil outside the pipe mainly shows uplift deformation in oblique direction. The soil in the pipe is mainly uplift deformation, and the maximum deformation in depth direction is Take the middle part of the soil pipe; the deformation law of the soil at different sections is basically the same, and the shear deformation of the soil between sections is small.