Stability Analysis and Failure Process of Sliding Boulder——A Case Study in Mabian County, Sichuan Province

Peng Taixin

您当前的位置：

首页 >

文章列表页 >

Stability Analysis and Failure Process of Sliding Boulder——A Case Study in Mabian County, Sichuan Province

更新时间：2025-09-25

- Stability Analysis and Failure Process of Sliding Boulder——A Case Study in Mabian County, Sichuan Province
- Issue 2, Pages: 229-237(2021)
- 作者机构：
  
  西南石油大学地球科学与技术学院,四川,成都,610500
- 作者简介：
- 基金信息：
- DOI：
  CLC： P583;TU457
- Published：2021
- 稿件说明：
移动端阅览
彭泰鑫,朱大鹏,黄玲,罗鑫.滑移孤石稳定性分析及失稳过程研究——以四川省马边县某孤石为例∗[J].防灾减灾工程学报,2021,(2):229-237

Peng Taixin. Stability Analysis and Failure Process of Sliding Boulder——A Case Study in Mabian County, Sichuan Province[J]. 2021, (2): 229-237.
彭泰鑫,朱大鹏,黄玲,罗鑫.滑移孤石稳定性分析及失稳过程研究——以四川省马边县某孤石为例∗[J].防灾减灾工程学报,2021,(2):229-237 DOI：

Peng Taixin. Stability Analysis and Failure Process of Sliding Boulder——A Case Study in Mabian County, Sichuan Province[J]. 2021, (2): 229-237. DOI：

摘要

停留在高陡山坡且部分埋入土体的大体积独立崩积物——孤石，在降雨和地震等不良地质情况下会发生失稳破坏并威胁坡脚居民的生命财产安全，独立滑移破坏为孤石的一种主要破坏形式。为了探究独立滑移孤石的滑移力学原理，分析土体物理力学参数对孤石滑移失稳的影响。基于库伦土压力理论，建立上部楔形体土压力计算模型、下部楔形体模型和左右土体模型，使用 Mathematics 软件分析模型公式中的抗剪强度、黏聚力和滑裂角等对土压力的影响，并使用 Flac3D 有限差分法分析滑移孤石的失稳过程。结果显示，上部土体所提供的下滑推力随着抗剪强度和黏聚力值的增大而呈减小趋势，下部土体模型能承受的孤石最大推力约 19 kN，当孤石推力大于 19 kN 时，孤石下部土体将以 29.22°的滑裂角滑出；下部土体所提供的抗滑力随着抗剪强度和黏聚力的增大而增大，有限差分法模拟得到了孤石以推动表层土体向临空面滑移的方式失稳。孤石周围土体的抗剪强度和黏聚力对孤石稳定性具有控制作用，降雨使抗剪强度和黏聚力降低是孤石滑移失稳的主要原因。

Abstract

The large-volume isolated collapsed material，which remains on the high and steep slopes and partially buries in the soil，may collapse and cause damage under unfavorable geological conditions such as rainfall and earthquakes，and threatens the safety of life and property of the residents at the foot of the slope. Isolated sliding is a major failure form of a separated stone. In order to explore the slide mechanism of the isolated rocks，the influence of soil physical and mechanical parameters on the stability of the boulders was analyzed. Based on Coulomb′s earth pressure theory，the upper wedge soil pressure calculation model，the lower wedge shape model and the left and right soil modelwere established. The influence of shear strength，cohesion and slip angle on the earth pressure was analyzed by using the Mathematical software. And the Flac3D finite difference software was employed to analyze the failure process of an isolated rock. As a result，the sliding thrust provided by the upper soil decreases with the increase of shear strength and cohesion. The maximum thrust of the isolated boulder that the lower soil can withstand is about 19kN. The soil under the boulder will slide out at a slip angle of 29.22° when the thrust is greater than 19kN. The anti-sliding force provided by the lower soil increases with the increase of shear strength and cohesion. The failure mode obtained by the finite difference simulation shows that the surface soil pushed by the boulder slides toward the free face. The shear strength and cohesion of the soil around the boulder have a controlling effect on the stability of the boulder. Rainfall，which reduces the shear strength and cohesion of the surrounding soil，is the main reason for the instability of the isolated boulders.

关键词

Keywords

references

Pérez-Rey L,Alejano L R,Riquelme A,et al.Failure mechanisms and stability analyses of granitic boulders focusing a case study in Galicia(Spain)[J].Interna? tional Journal of Rock Mechanics and Mining Sciences,2019,119:58-71.

Alejano L R,Ordó?ez C,Armesto J,et al.Assess? ment of the instability hazard of a granite boulder[J].Natural Hazards,2010,53(1):77-95.

王唤龙,孙毅,周德培,等.红层堆积体高边坡坡体结构及变形规律[J].岩石力学与工程学报,2010,29(增 1):2887-2894.Wang H L,Sun Y,Zhou D P,et al.Slope structure and deformation law of high slope of red bed accumula? tion[J].Chinese Journal of Rock Mechanics and Engi? neering,2010,29(Sup1):2887-2894(.in Chinese)

魏瑞,王唤龙,周德培,等.红层堆积体地区坡体结构分类[J].地下空间与工程学报,2010,6(6):1178-1183.Wei R,Wang H L,Zhou D P,et al.Classification of slope structure in red bed accumulation area[J].Chi? nese Journal of Underground Space and Engineering,2010,6(6):1178-1183.(in Chinese)

王刚耀,李新.花岗岩孤石的处理[J].西部探矿工程,2005,17(3):36-37.Wang G Y,Li X.Treatment of granite boulder[J].Western Exploration Engineering,2005,17(3):36-37.(in Chinese)

袁国庆,檀瑞青,张明森,等.双江口水电站环境边坡孤石及危岩体发育特征与防治措施[J].四川地质学报,2011,31(4):435-437,445.Yuan G Q,Tan R Q,Zhan M S,et al.Development characteristics and prevention measures of boulder and dangerous rock mass in environmental slope of Shuangji? angkou Hydropower Station[J].Acta Geologica Sini? ca,2011,31(4):435-437,445.(in Chinese)

黄润秋,刘卫华,周江平,等.滚石运动特征试验研究 [J].岩土工程学报,2007,29(9):1296-1302.Huang R Q,Liu W H,Zhou J P,et al.Experimentalstudy on the characteristics of rolling stone movement [J].Chinese Journal of Geotechnical Engineering,2007,29(9):1296-1302.(in Chinese)

杨智翔,裴向军,袁进科.高陡边坡危岩体孤石的稳定性分析[J].路基工程,2017(1):25-29.Yang Zh X,Pei X J,Yuan J K.Stability analysis of dangerous rocks in high-steep slopes[J].Subgrade En? gineering,2017(1):25-29.(in Chinese)

沈珠江.理论土力学[M].北京:中国水利水电出版社,2000.Shen Zh J.Theoretical soil mechanics [M].Beijing:China Water Resources and Hydropower Press,2000.(in Chinese)

陈祖煜.土力学经典问题的极限分析上、下限解[J].岩土工程学报,2002,24(1):1-11..Chen Z Y.Upper and lower solutions of limit analysis for classical problems of soil mechanics [J].Chinese Journal of Geotechnical Engineering,2002,24(1):1-11.(in Chinese)

李巨文,王翀,梁永朵,等.挡土墙后粘性填土的主动土压力计算[J].岩土工程学报,2006,28(5):650-652.Li J W,Wang Ch,Liang Y D,et al.Calculation of ac? tive earth pressure on cohesive backfill behind retaining wall[J].Chinese Journal of Geotechnical Engineering,2006,28(5):650-652.(in Chinese)

Views

575

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Stability Analysis of Soil‑rock Mixture Slope under Earthquake

Modified Swedish Slice Method for Stability Analysis of Weak Subgrade on Slope

Related Author

Kangqi LIU

Hongyan LIU

Chunyan WANG

Baoning HONG

Hao SHAN

Xin LIU

Related Institution

College of Engineering & Technology, China University of Geosciences

Key Laboratory of Deep Geodrilling Technology of Ministry of Natural Resources

Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University

Jiangsu Research Center for Geotechnical Engineering Technology, Hohai University

Geotechnical Research Institute, Hohai University

⁰