地震作用下双排抗滑桩支护边坡振动台试验研究

赖杰; 郑颖人; 刘云; 李秀地; 阿比尔的

doi:10.11779/CJGE201404012

地震作用下双排抗滑桩支护边坡振动台试验研究 English Version

赖杰^{1, 3},
郑颖人^{1, 2},
刘云⁴,
李秀地^1,,
阿比尔的^{2, 5}

1. 后勤工程学院军事土木工程系,重庆 400041;
2. 重庆市地质灾害防治工程技术研究中心,重庆 400041;
3. 岩土力学与地质环境保护重庆市重点试验室,重庆 401311;
4. 重庆工业职业技术学院建筑与环境工程系,重庆 401120;
5. 中科院武汉岩土力学研究所,湖北武汉 430071

基金项目: 科技部973项目（2011CB013600，2011CB710603）; 国家自然科学基金项目（5137896）

详细信息

作者简介:
赖杰(1986- ),男,四川内江人,博士研究生,主要从事岩土稳定性分析和数值模拟方面的工作。E-mail: 513516059@qq.com。

通讯作者:
李秀地

中图分类号: TU473
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出版历程
- 收稿日期: 2013-08-19
- 发布日期: 2014-04-21

Shaking table tests on double-row anti-slide piles of slopes under earthquakes

LAI Jie^{1, 3},
ZHENG Ying-ren^{1, 2},
LIU Yun⁴,
LI Xiu-di^1,,
ABI Erdi^{2, 5}

1. Department of Civil Engineering, Logistical Engineering University, Chongqing 400041, China;
2. Chongqing Engineering and Technology Research Center of Geological Hazard Prevention and Treatment, Chongqing 400041, China;
3. Chongqing Key Laboratory of Geomechanics & Geoenvironment Protection, Chongqing 401311, China;
4. Chongqing Industry Polytechnic College, Chongqing 401120, China;
5. Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China

摘要

摘要: 利用大型振动台试验研究双排抗滑桩支护在地震荷载作用下的抗震性能。通过对比上部锚杆+下部双排桩共同支护与单一桩支护的破坏过程,分析两种情况下坡体的动力响应与破坏机制。试验表明在桩+锚杆共同支护下,桩后边坡坡脚首先发生剪切破坏,当地震动作用增大到一定范围,坡顶出现张拉裂缝,两者贯通时边坡发生越顶破坏；单一桩支护条件下,首先在坡顶出现张拉裂缝,裂缝随着地震动作用增大向下扩展,当同下部剪切滑移带贯通时,边坡失稳破坏。通过坡体裂缝发展过程、位移及加速度监测数据表明,前者的抗震性能显著优于后者；在地震动作用下,边坡破坏是张拉–剪切复合作用的结果。试验研究为双排抗滑桩抗震设计奠定了坚实的基础。
- 振动台试验 /
- 抗震性能 /
- 抗滑桩 /
- 张拉– /
- 剪切
Abstract: A large shaking table test is performed to study the seismic performance of a slope with double-row anti-slide piles triggered by seismic load. Different dynamic response characteristics and failure mechanisms are studied by comparing the failure processes of a pile-anchor mixed support system and a single pile support system. The tests show that shear failure first occurs at the slope toe under a pile-anchor mixed support. As the horizontal acceleration increases, tension crack starts to develop at the top of the slope. The overall failure of the slope occurs when a global failure surface is formed, connecting the shear failure at the toe and tension crack at the top. However, tension cracks first appear at the slope top under the single pile support conditions. These cracks extend towards the slope toe as the acceleration increases and eventually lead to the overall slope failure. The experimental observations and data demonstrate that the seismic performance of the former is better than that of the latter. The slope failure is the result of the combined effect of tension and shear. This experimental study has laid a solid foundation for the seismic design of anti-slide piles.
- shaking table test /
- seismic performance /
- anti-slide pile /
- tension and shear /
- undefined

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参考文献(15)

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