复杂应力状态下土质高边坡稳定性分析

›› 2010, Vol. 31 ›› Issue (S2): 328-334.

复杂应力状态下土质高边坡稳定性分析

马宗源，廖红建，祈影

西安交通大学土木工程系，西安 710049

收稿日期:2010-07-29 出版日期:2010-12-10 发布日期:2011-01-12
作者简介:马宗源，男，1980年生，博士，主要从事岩土材料的稳定性分析与数值计算的研究。
基金资助:
国家自然科学基金资助项目（No.50979087）；三峡库区地质灾害教育部重点实验室基金资助项目（No. 2008KDZ09）。

Stability analysis of high soil slope under complex stress state

MA Zong-yuan, LIAO Hong-jian, QI Ying

Department of Civil Engineering, Xi’an Jiaotong University, Xi’an 710049, China

Received:2010-07-29 Online:2010-12-10 Published:2011-01-12

摘要/Abstract

摘要：

结合现有的实际滑坡场地，开展了关中盆地黄土塬边的高边坡稳定性研究。基于弹塑性理论和非关联流动法则，根据双剪统一强度理论，建立了双剪统一弹塑性本构模型的显式有限差分格式。针对陕西省泾阳县南塬高边坡滑坡的现场勘测和室内试验，分析了滑坡的规模和滑坡前后的地形特征。在此基础上，还原了滑坡前的边坡地形概状，建立三维计算模型并运用三维拉格朗日有限差分方法分析了中间主应力对高边坡稳定性的影响；然后考虑中间主应力的影响对不同地下水埋深和渗流时边坡的稳定性进行分析。结果表明，考虑中间主应力情况下，随着地下水位升高，坡顶水平向位移增大；当不考虑渗流时，坡顶水平位移增大到一定值后边坡达到稳定状态，而考虑渗流时坡顶水平位移持续增大，并且容易发生突然的破坏失稳。期望对泾阳南塬滑坡群的破坏机制研究提供一定参考。

关键词: 土质高边坡, 稳定性分析, 双剪统一强度理论, 拉格朗日有限差分

Abstract:

Based on the existing landslide field, a stability analysis of high slope along the loess plateau of Guanzhong Basin is presented. The format of explicit finite difference of twin shear unified elastoplastic constitutive model is developed which is based on the elastoplastic theory, non-associated flow rule and twin shear unified strength theory. According to the site surveys and laboratory tests, the terrain features before and after sliding and scale of the slope are analyzed; and the three-dimensional model is created from the sketch of terrain before the landslide event. With the influence of intermediate principal stress, stability analysis of high slope is processed with FLAC3D; ground water level variation and seepage flow are taken into account. The results show that the horizontal displacement at top of slope increases with the rising of ground water level with the consideration of intermediate principal stress. The result of no seepage flow calculation shows that the slope reaches a steady state under a certain displacement yielded on the top of slope. However, the displacement increases continually and then sudden failure may occur when the seepage flow is taken into account. This study may provide a reference for the research of failure mechanism of high soil slope.

Key words: high soil slope, stability analysis, twin shear unified strength theory, Lagrangian finite difference

中图分类号:

TU431

马宗源，廖红建，祈影. 复杂应力状态下土质高边坡稳定性分析[J]. , 2010, 31(S2): 328-334.

MA Zong-yuan, LIAO Hong-jian, QI Ying. Stability analysis of high soil slope under complex stress state[J]. , 2010, 31(S2): 328-334.

参考文献

相关文章 15

[1]	聂秀鹏, 逄焕平, 孙志彬, 谢松梅, 侯超群. 三维加筋边坡地震稳定性上限分析[J]. 岩土力学, 2019, 40(9): 3483-3492.
[2]	陈建功, 李会, 贺自勇, . 基于变分法的均质土坡稳定性分析[J]. 岩土力学, 2019, 40(8): 2931-2937.
[3]	张龙飞, 吴益平, 苗发盛, 李麟玮, 康田. 推移式缓倾浅层滑坡渐进破坏力学模型与稳定性分析[J]. 岩土力学, 2019, 40(12): 4767-4776.
[4]	秦雨樵，汤华，冯振洋，尹小涛，王东英, . 基于聚类分析的边坡稳定性研究[J]. , 2018, 39(8): 2977-2983.
[5]	李清川，李术才，王汉鹏，张红军，张冰，张玉强,. 上覆流沙层隧道开挖面稳定性分析与数值试验研究[J]. , 2018, 39(7): 2681-2690.
[6]	张海涛，罗先启，沈辉，毕金锋. 基于矢量和的滑面应力抗滑稳定分析方法[J]. , 2018, 39(5): 1691-1698.
[7]	李宁，郭双枫，姚显春,. 再论岩质高边坡稳定性分析方法[J]. , 2018, 39(2): 397-406.
[8]	朱彦鹏，杨晓宇，马孝瑞，杨校辉，叶帅华, . 边坡稳定性分析双折减法的几个问题[J]. , 2018, 39(1): 331-338.
[9]	聂治豹，郑宏，张谭. 基于强度折减法确定边坡临界滑面的小波变换法[J]. , 2017, 38(6): 1827-1831.
[10]	张锟，徐青，王一凡，阿湖宝. 自适应差分进化算法在边坡滑面搜索中的应用[J]. , 2017, 38(5): 1503-1509.
[11]	符贵军，张思渊，张玉军. 一种双重孔隙-裂隙岩体流变模型及其在地下洞室有限元分析中的应用[J]. , 2017, 38(2): 601-609.
[12]	邓东平，李亮. 基于滑动面应力假设下的三维边坡稳定性极限平衡法研究[J]. , 2017, 38(1): 189-196.
[13]	周勇，王正振, . 土钉墙内部稳定性分析方法改进[J]. , 2016, 37(S2): 356-362.
[14]	韩龙强，吴顺川，李志鹏, . 基于Hoek-Brown准则的非等比强度折减方法[J]. , 2016, 37(S2): 690-696.
[15]	高如超，李春光，孙聪，郑宏，葛修润,. 考虑张剪破坏的边坡下限原理有限元法[J]. , 2016, 37(8): 2426-2432.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed