基于透明土的取土管贯入扰动变形试验研究

发布时间：2019-05-15 17:56

【摘要】：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。
[Abstract]:In the process of geotechnical engineering investigation and sampling, the penetration of soil pipe will cause the disturbance and deformation of soil, which will affect the accurate evaluation of the physical and mechanical properties of soil. In order to study the characteristics of soil disturbance and deformation in the process of soil intake pipe penetration, based on transparent soil and PIV technology, the corresponding soil intake pipe penetration model test system is developed, and the penetration test of soil intake pipe is carried out. The distribution characteristics of soil disturbance deformation field in the process of soil intake pipe penetration are obtained. The experimental results show that the disturbance deformation of soil increases with the increase of penetration depth of soil intake pipe, and the soil outside the pipe mainly shows oblique uplift deformation. The soil in the pipe is mainly uplift deformation, and the maximum deformation in the depth direction is located in the middle of the soil intake pipe. The deformation law of the soil in different sections is basically the same, and the shear deformation between the sections is small.
【作者单位】：河海大学岩土力学与堤坝工程教育部重点实验室;江苏省岩土工程技术工程研究中心;同济大学地下建筑与工程系;
【基金】：国家自然科学基金项目(51279049) 中央高校基本科研业务费项目(2015B25914)
【分类号】：TU195;TU41

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