东北大学学报(自然科学版) ›› 2024, Vol. 45 ›› Issue (8): 1159-1166.DOI: 10.12068/j.issn.1005-3026.2024.08.012

• 资源与土木工程 • 上一篇    下一篇

基于GeoSMA-3D的岩质边坡异形滑动面搜索方法

王述红, 李忠, 侯钦宽, 李友明   

  1. 东北大学 资源与土木工程学院,辽宁 沈阳 110819
  • 收稿日期:2023-04-04 出版日期:2024-08-15 发布日期:2024-11-12
  • 作者简介:王述红(1969-),男,江苏泰州人,东北大学教授,博士生导师.
  • 基金资助:
    中国-中东欧国家高校联合教育项目(2021111);国家自然科学基金资助项目(U1602232);辽宁省重点科技计划项目(2019JH2-10100035);中央高校基本科研业务费专项资金资助项目(N2301005)

Search Method for Irregular Sliding Surface of Rock Slope Based on GeoSMA-3D

Shu-hong WANG, Zhong LI, Qin-kuan HOU, You-ming LI   

  1. School of Resources & Civil Engineering,Northeastern University,Shenyang 110819,China. Corresponding author: LI Zhong,E-mail: 1850184129@qq. com
  • Received:2023-04-04 Online:2024-08-15 Published:2024-11-12

摘要:

针对岩体结构面发育特征的不确定性,提出一种岩质边坡异形滑动面搜索方法.以Ⅲ,Ⅳ结构面岩体为研究对象,结合GeoSMA-3D(geotechnical structure and model analysis-3D)程序中块体切割和关键块体判别模块,将滑坡体设定为几何多面体.岩体的内部块体组合形成多面体,以多面体的表面表征滑动面.引入层次分析法,建立滑动面准定量化评价准则.以小盘岭边坡为例,将异形滑动面判定准则导入GeoSMA-3D程序中,研究表明边坡存在6个关键块体,组合滑动面有3个,潜在滑动面安全系数为1.046,滑动面几何形态与实际边坡拟合度高达95%,验证了岩质边坡滑动面搜索方法的合理性.

关键词: 岩质边坡, 滑动面, GeoSMA-3D, 关键块体, 层次分析法

Abstract:

Given the uncertainty in the development characteristics of rock discontinuities, a method for searching for irregular sliding surfaces in rock slopes was proposed. Using the rock masses of rock discontinuities III and IV as research objects, and utilizing the block cutting and key block identification modules in the GeoSMA-3D (geotechnical structure and model analysis-3D) system, the sliding mass is set as a geometric polyhedron. The internal block combinations of the rock mass form the polyhedron, with the surface of the polyhedron representing the sliding surface. The analytic hierarchy process is introduced to establish semi?quantitative evaluation criteria for the sliding surface. Using the Xiaopanling slope as a case study, the criteria for determining the irregular sliding surface were integrated into the GeoSMA-3D system. The study identifies six key blocks and three combined sliding surfaces. The potential sliding surface has a safety factor of 1.046, and the geometric shape of the sliding surface aligns with the actual slope with a fitness of up to 95%. This validates the rationality of the proposed method for searching sliding surfaces in rock slopes.

Key words: rock slope, sliding surface, GeoSMA-3D, key block, analytic hierarchy process(AHP)

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