堆积体滑坡抗滑桩所受推力计算及分布特征研究

张健; 胡瑞林; 李志清

堆积体滑坡抗滑桩所受推力计算及分布特征研究 English Version

1. 南阳师范学院土木建筑工程学院，河南南阳 473061; 2. 中国科学院地质与地球物理研究所工程地质力学重点实验室，北京 100029

基金项目: 国家自然科学基金项目(41072226);河南省科技攻关计划项目(122102310397);南阳师范学院高层次人才项目

详细信息

作者简介:
张健(1980– )，男，河南新乡人，博士，讲师，主要从事土压力、土石混合体和滑坡方面的研究与教学工作。E-mail: zhangjian9945016@126.com

中图分类号: TU473
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出版历程
- 收稿日期: 2012-01-04
- 发布日期: 2012-12-19

Distribution laws of thrust of talus slide on anti-sliding piles

1. Department of Civil Engineering, Nanyang Normal University, Nanyang 473061, China; 2. Key Laboratory of Engineering Geomechanics, Institute of Geology and Geophysics, Chinese Academy of Science, Beijing 100029, China

摘要

摘要: 沿下伏基岩面失稳是堆积体滑坡破坏主要模式之一,在土石混合体介质-接触面大型直剪试验成果基础上,发现土石混合体介质与接触面在剪切试验过程中表现出应变硬化和应变软化两种接触面力学性质,建立了能够描述上述两种接触面性质的表达式.基于一个简化的力学模型通过求系统极值的尖点突变理论推导了堆积体滑坡抗滑桩所受滑坡推力的计算公式,公式中考虑了上述描述应变硬化和应变软化两种接触面力学的表达式,利用该公式分析了其中的主要参数对抗滑桩所受推力大小及分布特征的影响.最后将推导公式应用到一个堆积层古滑坡实例中,对比分析表明该理论结果与现场实测结果具有较好的一致性.
- 堆积体滑坡 /
- 抗滑桩 /
- 滑坡推力 /
- 分布特征 /
- 尖点突变模型
Abstract: Talus always slides along the bedrock surface. On the basis of straight shear tests on earth-rock aggregate and bedrock, the sliding surface of talus slide is a combination of two media strain-hardening and strain-softening. A shear stress-strain constitutive model for the strain-softening medium is described by the Weibulls distribution law. A shear stress-strain constitutive model for the strain-hardening medium is described by the linear equation. Based on a simplified model for anti-sliding piles in talus slide, the formulas for calculating thrust on anti-sliding piles are derived by considering the above two shear stress-strain constitutive models. How the main parameters of the proposed formulas affect the distribution laws of talus slide thrust on anti-sliding pile is discussed. Finally, the rationality of the proposed formulas is demonstrated based on comparative analysis of the theoretical and the experimental results.
- talus slide /
- anti-sliding pile /
- landslide thrust /
- distribution law /
- cusp catastrophe model

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参考文献(17)

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