基于遍布节理模型的边坡稳定性强度折减法分析

›› 2006, Vol. 27 ›› Issue (4): 537-542.

基于遍布节理模型的边坡稳定性强度折减法分析

吴顺川，金爱兵，高永涛

北京科技大学土木与环境工程学院，北京 100083

收稿日期:2005-08-08 出版日期:2006-04-10 发布日期:2013-11-05
作者简介:吴顺川，1969年生，男，博士，副教授，主要从事岩土工程、工程力学等方面的研究和教学工作

Slope stability analysis by strength reduction method based on ubiquitous-joint model

WU Shun-chuan, JIN Ai-bing, GAO Yong-tao

School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China

Received:2005-08-08 Online:2006-04-10 Published:2013-11-05

摘要/Abstract

摘要： 采用非线性数值分析方法分析边坡稳定性问题时，强度折减法因其具有较多的优点而得到广泛应用。岩土体一般采用理想弹塑性模型，屈服准则为广义米赛斯准则。对于密集节理岩质边坡稳定性问题，采用遍布节理模型可同时考虑岩块和节理属性，更符合岩体状态及工程实际，认为岩体经强度折减后潜在破坏可能首先出现在岩体中或沿节理面或二者同时破坏。结合工程实例，基于遍布节理模型的强度折减法计算结果表明，潜在滑移面为折线型滑面，下部潜在滑移面倾角与节理面等效内摩擦角基本一致，上部潜在滑移面与岩体拉破坏相关；节理倾角与边坡安全系数、潜在滑动范围密切相关，陡倾角节理对边坡稳定性影响较小。通过对边坡失稳判据和边坡滑移面确定的探讨，认为以力或位移不收敛作为边坡失稳判据是适当的，而边坡的剪应变速率物理意义十分明确，适于作为边坡潜在滑移面的确定依据。

关键词: 强度折减法, 岩质边坡, 遍布节理模型, 稳定性, 失稳判据, 潜在滑移面

Abstract: Due to the merits of strength reduction method, it has been broadly used in nonlinear numerical analysis of the slope stability. In general, the rock and soil are regarded as to be an idealized elastoplastic model; and Mises yield criterion is used. The stability analysis of densely jointed rock slopes using ubiquitous-joint model , the joint property can be considered as well as the rock, thus fitting better with the practical engineering. It is assumed that failure might occur first either in rock or along joint or in both during the rock strength reduction. According to a real engineering project and based on strength reduction method with ubiquitous-joint model, the calculation results show that the potential slip surface appears in style of a polygonal plane; and the dip angle of the potential slip near slope foot is similar to the equivalent friction angle of joint, while the potential slip near the top slope is related to tension failure of rock. The results also show that the dip angle of the joint determines the slope safety factor and the potential slip range. The steeper joint sets affect less the slope stability. Throughout the investigation of the slope failure criteria and the slip surface, it is recognized that the case of the force or displacement becoming not convergent can be properly used as the failure criteria of slope. The shear strain rate in slope can also be used as the criteria for confirming the potential slip of slope because its physical meaning is very explicit.

Key words: strength reduction method, rock slope, Ubiquitous-Joint model, stability, failure criteria, potential slip face

中图分类号:

TU 443

吴顺川，金爱兵，高永涛. 基于遍布节理模型的边坡稳定性强度折减法分析[J]. , 2006, 27(4): 537-542.

WU Shun-chuan, JIN Ai-bing, GAO Yong-tao. Slope stability analysis by strength reduction method based on ubiquitous-joint model[J]. , 2006, 27(4): 537-542.

参考文献

相关文章 15

[1]	陈峥, 何平, 颜杜民, 高红杰, 聂奥祥, . 超前支护下隧道掌子面稳定性极限上限分析[J]. 岩土力学, 2019, 40(6): 2154-2162.
[2]	朱仁杰, 车爱兰, 严飞, 文海, 葛修润, . 含贯通性结构面岩质边坡动力演化规律[J]. 岩土力学, 2019, 40(5): 1907-1915.
[3]	李驰, 王硕, 王燕星, 高瑜, 斯日古楞, . 沙漠微生物矿化覆膜及其稳定性的现场试验研究[J]. 岩土力学, 2019, 40(4): 1291-1298.
[4]	余国, 谢谟文, 郑正勤, 覃事河, 杜岩, . 基于GIS的边坡稳定性计算方法研究[J]. 岩土力学, 2019, 40(4): 1397-1404.
[5]	吴梦喜, 高桂云, 杨家修, 湛正刚, . 砂砾石土的管涌临界渗透坡降预测方法[J]. 岩土力学, 2019, 40(3): 861-870.
[6]	王启茜, 周洪福, 符文熹, 叶飞, . 水流拖曳力对斜坡浅层土稳定性的影响分析[J]. 岩土力学, 2019, 40(2): 759-766.
[7]	尹晓萌, 晏鄂川, 刘旭耀, 李兴明, . 土体稳定性计算中地下水作用力探讨[J]. 岩土力学, 2019, 40(1): 156-164.
[8]	吴顺川, 姜日华, 张诗淮, 张敏, . 修正Hoek-Brown强度准则在钻孔稳定性分析中的应用[J]. 岩土力学, 2018, 39(S2): 1-13.
[9]	郭红仙, 周鼎. 软土中基坑土钉支护稳定性问题探讨[J]. 岩土力学, 2018, 39(S2): 398-404.
[10]	王克忠, 金志豪, 杨麦珍, 刘先亮, 刘华, . 取水塔基坑开挖过程倒悬岩坎围堰渗透稳定性研究[J]. 岩土力学, 2018, 39(S2): 415-422.
[11]	尹小涛，薛海斌，汤华，任兴文，宋罡,. 边坡局部和整体稳定性评价方法的辩证统一[J]. , 2018, 39(S1): 98-104.
[12]	谷拴成，周攀，黄荣宾. 锚杆–围岩承载结构支护下隧洞稳定性分析[J]. , 2018, 39(S1): 122-130.
[13]	尹小涛，严飞，秦雨樵，周磊，王东英, . 地震作用下华丽高速公路金沙江桥华坪岸顺层边坡动力稳定性评价[J]. , 2018, 39(S1): 387-394.
[14]	代仲海，胡再强，尹小涛，吴振君，. 工程荷载作用下缓倾角反倾似层状岩质边坡变形稳定性分析[J]. , 2018, 39(S1): 412-418.
[15]	周勇，令永强，杨校辉, . 考虑附加应力作用的桩锚支护结构稳定性与位移关系研究[J]. , 2018, 39(8): 2913-2921.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed