地震和地下水耦合作用下砂土边坡稳定性研究

宋波; 黄帅; 蔡德钩; 叶阳升

地震和地下水耦合作用下砂土边坡稳定性研究 English Version

宋波¹,
黄帅¹,
蔡德钩^{2, 3},
叶阳升^{2, 3}

1. 北京科技大学土木与环境工程学院,北京 100083; 2. 中国铁道科学研究院铁道建筑研究所,北京 100081; 3.高速铁路轨道技术国家重点实验室,北京 100081

基金项目: 国家高技术研究发展计划专项经费资助项目（2011AA11A102）

详细信息

作者简介:
宋波(1962- )，男，山东招远人，博士，教授，博士生导师，主要从事土木工程结构抗震等方面的研究。E-mail: songbo@ces.astb.edu.cn。

中图分类号: TU43
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出版历程
- 收稿日期: 2013-07-16
- 发布日期: 2013-11-24

Stability of sandy soil slope under the coupling of earthquake and groundwater

1. School of Civil and Environment Engineering, University of Science and Technology Beijing, Beijing 100083, China; 2.Railway Engineering Research Institute, China Academy of Rails Science, Beijing 100081, China; 3.State Key Lab of Track Technology of High-speed Railway, China Academy of Rails Science, Beijing 100081, China

摘要

摘要: 基于砂土边坡的有限元模型研究了地震和下水耦合作用下砂土边坡的稳定性。研究表明,规范中考虑地震和地下水影响的叠加法计算边坡的安全系数适用范围是非常有限的；采用边坡永久位移指标进行边坡的稳定性评价比安全系数更精确；随着地下水的升高边坡坡面的最大剪应变出现减小的趋势,且在边坡底部出现了最大值,为边坡容易剪出破坏位置,且边坡底部减的有效应力明显减小,对边坡的稳定极为不利；随着地下水升高,土钉的轴力和弯矩出现减小趋势,在靠近边坡底部位置的土钉轴力产生了最大值。最后,基于室内振动台试验结果与数值模拟的结果的对比分析,验证了本文数值模拟结果的准确性。
- 砂土边坡 /
- 地震和地下水耦合 /
- 永久变形 /
- 安全系数 /
- 土钉支护
Abstract: Based on the finite element model of sandy soil slope, the stability of sandy soil slope is studied. The results show that superposition method of coupling of earthquake and groundwater in codes is very limited. The evaluation index of permanent displacement is more accurate than safety factor. With the increase of groundwater, shear strain decreases, and the maximum value appears at the bottom of the slope which is destroyed easily, and the effective stress at the bottom of the slope decreases obviously, which is disadvantage for the stabilization of the slope. With the increase of groundwater level, the maximum axial force and the maximum bending moment show a decreasing trend, and the soil nailing axial force of the slope has the maximum value near the bottom of the slope. Based on the comparison between shaking table test and the numerical simulation, the accuracy of the numerical simulation results are verified.
- sandy slope /
- coupling of earthquake and groundwater /
- permanent displacement /
- safety factor /
- soil nailing

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参考文献(7)

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