包裹式加筋砂土边坡离心机试验研究与对比分析

周健; 周韵鸿; 李飞; 张姣

doi:10.11779/CJGE201403019

包裹式加筋砂土边坡离心机试验研究与对比分析 English Version

周健^{1, 2},
周韵鸿^{1, 2},
李飞³,
张姣⁴

1. 同济大学地下建筑与工程系,上海 200092; 2. 同济大学岩土及地下工程教育部重点实验室,上海 200092; 3. 中交第三航务工程勘察设计院有限公司,上海 200032; 4. 上海城市管理职业技术学院土木工程与交通学院,上海 200092

基金项目: 国家自然科学基金项目（41272296）

详细信息

作者简介:
周健(1957- )，男，博士，教授，博士生导师，主要从事土动力学、岩土地震工程、土体细观力学性质试验与数值模拟等方面的教学与研究工作。E-mail: tjugezhoujian@tongji.edu.cn。

中图分类号: TU411.93
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出版历程
- 收稿日期: 2013-06-16
- 发布日期: 2014-03-19

Centrifuge modelling of wrapped-reinforced sand slope and comparative analysis

ZHOU Jian^{1, 2},
ZHOU Yun-hong^{1, 2},
LI Fei³,
ZHANG Jiao⁴

1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China; 3. CCCC Third Harbor Consultants Co., Ltd., Shanghai 200032, China; 4. Department of Civil Engineering and Transportation , Shanghai Polytechnic College, Shanghai 200092, China

摘要

摘要: 利用自主设计的宏细观可视化全程拍摄系统,对包裹式加筋砂土边坡进行了离心机模型试验。研究了20g离心场下包裹式加筋砂土边坡宏观变形模式和力学性状以及筋土界面处细观作用机理和土颗粒运动规律。将离心机试验结果与1g静力模型试验结果进行了对比,分析了不同应力场下加筋边坡变形破坏的宏细观机理。研究结果表明：不同应力场下包裹式加筋砂土边坡破坏模式不同,高应力状态下界面处摩擦咬合力峰值大于筋材拉伸断裂强度,而低应力状态下界面处筋材拉伸断裂强度大于摩擦咬合力峰值。筋土界面处不同的应力状态是影响筋土界面作用方式的重要因素。该研究对进一步认识包裹式加筋砂土边坡破坏机理有积极意义。
- 包裹式加筋边坡 /
- 离心机试验 /
- 细观颗粒运动 /
- 宏细观机理
Abstract: Centrifuge tests on a geosynthetic-reinforced slope are performed to investigate its deformation modes, macroscopic mechanical properties and particle movement in the soil-geosynthetic interface. Through a comparison between the centrifugal test results at 20g and the static model test results, the macro-mesoscopic mechanism of the same size reinforced slope under different stresses is further analyzed. The results show that the wrapped-reinforced sand slope under different stresses has different failure modes. Under high stress state, the peak friction of the interface is greater than the tensile fracture strength of reinforcement materials. But under lower pressure, the tensile fracture strength of reinforcement materials is greater than the peak friction of the interface. Different stress states may significantly influence the interaction in the soil-geosynthetic interface. This study has a positive significance for further understanding the failure mechanism of the wrapped-reinforced sand slope.
- wrap-reinforced slope /
- centrifuge test /
- mesoscopic particle movement /
- macro-mesoscopic mechanism

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参考文献(12)

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