基于不同水压分布的平面滑动边坡稳定性研究

›› 2011, Vol. 32 ›› Issue (8): 2493-2499.

基于不同水压分布的平面滑动边坡稳定性研究

吴恒滨^{1, 2}，何泽平¹，曹卫文³

1.重庆三峡学院建筑工程系，重庆 404000；2.重庆市城口县国土资源和房屋管理局，重庆 405900； 3.湖南省地质环境监测总站，长沙 410007

收稿日期:2010-02-05 出版日期:2011-08-10 发布日期:2011-08-16
作者简介:吴恒滨，男，1984年生，硕士，助教，主要从事岩土工程方面的教学与科研工作
基金资助:
重庆市自然科学基金（No. CSTC, 2010BB1315）；重庆市教委科研项目（No. KJ101113）；重庆三峡学院科学研究项目（重点项目：No. 10ZD-11；青年项目：No. 10QN-21）；重庆市万州区国土资源与房屋管理局科技咨询项目

Stability study of slope with planar failure based on different water pressure distributions

WU Heng-bin^{1, 2}, HE Ze-ping¹, CAO Wei-wen³

1. Department of Architectural Engineering, Chongqing Three Gorges University, Chongqing 404000, China; 2. Chengkou County Administration of State Land, Resources and Housing of Chongqing City, Chongqing 405900, China; 3. General Geological Environmental Monitoring Station of Hunan Province, Changsha 410007, China

Received:2010-02-05 Online:2011-08-10 Published:2011-08-16

摘要/Abstract

摘要： 为研究地下水对平面滑动边坡的影响，归纳了平面滑动边坡常见的3种水压分布形式，并阐述了其分布假设的合理性。根据极限平衡理论，采用Matlab编制程序，通过有无张裂缝两个算例，定性与定量分析相结合，就不同滑动面水深、滑动面倾角、坡高、坡顶倾角、裂缝水平夹角等影响因子进行敏感性分析，重点探讨了在不同水压分布时影响因子对边坡安全系数影响的动态演绎规律。研究表明，平面滑动边坡临界倾角可通过极限平衡理论编制程序计算，并考虑地下水得出临界倾角变化趋势，取经验值10%为浮动范围；边坡影响因子对安全系数的影响随着地下水位的升高而变大，其中坡高对安全系数影响显著，坡顶倾角、张裂缝水平夹角和坡顶距张裂缝距离等对安全系数影响不明显。

关键词: 平面滑动, 水压分布, 边坡稳定性, 临界倾角, 敏感性分析

Abstract: In order to study the impact of groundwater on slope with planar failure surface, three common forms of water pressure distribution are generalized; and the rationality of assumption for water pressure is described. According to the limit equilibrium theory, using Matlab to program, and through two examples with or without tension fissures, combined the methods of quantitative and qualitative analysis, sensitivities of the factors such as water depth, failure surface angle in sliding surface, slope height, slope crest angle, horizontal angle of tension fissure are analyzed. Dynamic law of influence of the factors on slope safety factor is discussed under different water pressure distributions. The results show that the critical angle of planar sliding slope could be calculated by program according to limit equilibrium theory; and the variation of critical angle is obtained considering groundwater; 10% of empirical value is the floating range. Influence of factors on slope safety factor is enhanced as the rising of groundwater table. The influence of slope height is significant; but the influences of slope crest angle, horizontal angle of tension fissure, and distance from crest to tension fissure are not obvious.

Key words: planar sliding, water pressure distribution, slope stability, critical angle, sensitivity analysis

中图分类号:

TU 457

吴恒滨，何泽平，曹卫文. 基于不同水压分布的平面滑动边坡稳定性研究[J]. , 2011, 32(8): 2493-2499.

WU Heng-bin , HE Ze-ping , CAO Wei-wen. Stability study of slope with planar failure based on different water pressure distributions[J]. , 2011, 32(8): 2493-2499.

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