基于透明土的取土管贯入扰动变形试验研究

吴跃东; 罗如平; 刘坚; 杨冬

doi:10.11779/CJGE201608019

基于透明土的取土管贯入扰动变形试验研究 English Version

吴跃东^{1, 2},
罗如平³,
刘坚^{1, 2},
杨冬^{1, 2}

1. 河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京 210098; 2. 江苏省岩土工程技术工程研究中心,江苏南京 210098; 3. 同济大学地下建筑与工程系上海 200092

详细信息

作者简介:
吴跃东（1969- ）,男,福建云霄人,副教授,博士,主要从事岩土工程测试及软土地基处理研究。E-mail: hhuwyd@163.com。

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出版历程
- 发布日期: 2016-08-24

Soil disturbance deformation induced by penetration of sampler tube based on transparent soils

WU Yue-dong^{1, 2},
LUO Ru-ping³,
LIU Jian^{1, 2},
YANG Dong^{1, 2}

1. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China; 2. Geotechnical Engineering Center of Jiangsu Province, Nanjing 210098, China; 3. Department of Geotechnical Engineering, Tongji University, Shanghai 200092

摘要

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。
- 取土管 /
- 扰动变形 /
- 取土贯入 /
- 透明土 /
- PIV技术
Abstract: The soil disturbance deformation induced by penetration of sampler tube has a great influence on the accuracy of physical and mechanical evaluation of soils in the soil investigation engineering. A small-scale model test system is developed to study the non-intrusive measurement of the soil disturbance deformation characteristics during penetration of sampler tube using the transparent soils and PIV (particle image velocimetry) technique. Sampling penetration tests are conducted, and the soil deformation characteristics during penetration of sampler tube are obtained. The test results show that the soil disturbance deformation increases with the penetration depth of sampler tube, and the upheaval deformation of soils outside the sampler is dominated. The disturbance deformation of soils in the sampler is mainly upheaval, and the maximum upheaval deformation occurs at the middle of the sampler in the depth direction. The deformation distribution characteristics of soils on different sections in the sampler are nearly the same, and the shear strain of soils between adjacent sections is relatively small.
- sampler /
- disturbance deformation /
- sampling penetration /
- transparent soil /
- PIV technique

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参考文献(19)

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