中国安全科学学报 ›› 2018, Vol. 28 ›› Issue (5): 141-146.doi: 10.16265/j.cnki.issn1003-3033.2018.05.024

• 安全工程技术科学 • 上一篇    下一篇

基于概率统计的土石混合体边坡可靠度分析方法

张健萍1 助理研究员, 周东2 助理研究员   

  1. 1 中国民用航空飞行学院 民航安全工程学院,四川 广汉618307;
    2 中国科学院 力学研究所,北京 100190
  • 收稿日期:2018-02-02 修回日期:2018-04-15 出版日期:2018-05-28 发布日期:2020-11-25
  • 作者简介:张健萍(1986—),女,四川内江人,博士,助理研究员,主要从事安全工程等方面的研究。E-mail:jpzhang@live.com。

Reliability analysis method for earth-rock aggregate slope based on probability statistics

ZHANG Jianping1, ZHOU Dong2   

  1. 1 College of Civil Aviation Safety Engineering,Civil Aviation Flight University of China,Guanghan Sichuan 618307,China;
    2 Institute of Mechanics,Chinese Academy of Sciences,Beijing 100190,China
  • Received:2018-02-02 Revised:2018-04-15 Online:2018-05-28 Published:2020-11-25

摘要: 为确切描述边坡实际状态,更准确评估边坡稳定性,提出一种基于概率统计的边坡可靠度分析方法。该方法考虑土石混合体边坡平均强度的不确定性和强度在空间上的变异性,综合利用蒙特卡罗方法和连续非连续单元法(CDEM)计算评估边坡可靠程度;将坡体表面的相对位移量作为基本指标,从定性和定量2个方面确定边坡的失稳标准;通过分析一个典型的土石混合体边坡,获得边坡在不同强度分布和强度等级下的可靠度,并结合一个实例对文中方法的有效性进行验证。结果表明:边坡强度的分布特性对边坡的变形失稳结果有较大影响,利用基于概率统计的可靠度分析方法可建立边坡稳定性与岩土材料强度特性的关系。

关键词: 土石混合体边坡, 可靠度, 概率统计, 双重变异性, 连续非连续单元法(CDEM)

Abstract: In order to describe the practical state of a slope,and to evaluate the stability of a slope more accurately,a reliability analysis method of earth-rock aggregate slope based on probability statistics was worked out.Dual variability of the slope was considered,including uncertainty of the average strength and spatial variation of the strength of a slope.The reliability of a slope was calculated and evaluated with the Monte Carlo method and CDEM.The failure criteria were proposed in qualitative and quantitative way based on the relative displacement between monitoring points.Through the analysis of a typical earth-rock aggregate slope,the reliability of the slope was obtained.The result shows that deformation and failure of a slope are well dependent on the distributive property of the strength,and the correlation between the strength distribution of the material and the stability of a slope can be found with the reliability analysis method based on probability statistics.

Key words: earth-rock aggregate slope, reliability, probability statistics, dual variability, continuum-discontinuum element method (CDEM)

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