华南理工大学学报(自然科学版)

• 环境科学与技术 • 上一篇    下一篇

考虑参数互相关性的滑坡抗剪强度参数可靠度反演分析

赵炼恒1 左仕1 陈静瑜1,2 王志斌3   

  1. 1. 中南大学 土木工程学院,湖南 长沙 410075; 2. 华东交通大学 轨道交通学院,江西 南昌 330000; 3. 湖南科技大学 土木工程学院,湖南 湘潭 411201
  • 收稿日期:2015-08-23 出版日期:2016-06-25 发布日期:2016-05-03
  • 通信作者: 赵炼恒(1980-),男,副教授,博士生导师,主要从事道路与铁道工程、岩土极限分析理论与应用等的研究. E-mail:zlh8076@163.com
  • 作者简介:赵炼恒(1980-),男,副教授,博士生导师,主要从事道路与铁道工程、岩土极限分析理论与应用等的研究.
  • 基金资助:
    国家自然科学基金资助项目(51208522);湖南省科学技术厅科技项目(2012SK3231,2012TT2039);贵州省交通运输厅科技项目(2012122033)

Reliability Back Analysis of Shear Strength Parameters of Landslide Considering Mutual-Correlation Between Parameters

ZHAO Lian-heng1 ZUO Shi1 CHEN Jing-yu1,2 WANG Zhi-bin3   

  1. 1.School of Civil Engineering,Central South University,Changsha 410075,Hunan,China; 2.School of Railway Tracks and Transportation,East China Jiaotong University,Nanchang 330000,Jiangxi,China; 3.School of Civil Engineering,Hunan University of Science and Technology,Xiangtan 411201,Hunan,China
  • Received:2015-08-23 Online:2016-06-25 Published:2016-05-03
  • Contact: 赵炼恒(1980-),男,副教授,博士生导师,主要从事道路与铁道工程、岩土极限分析理论与应用等的研究. E-mail:zlh8076@163.com
  • About author:赵炼恒(1980-),男,副教授,博士生导师,主要从事道路与铁道工程、岩土极限分析理论与应用等的研究.
  • Supported by:
    Supported by the National Natural Science Foundation of China(51208522),the Foundation of Hunan Provincial Science and Technology Department(2012SK3231,2012TT2039) and the Foundation of Guizhou Provincial Transportation Dapart-ment(2012122033)

摘要: 鉴于传统的确定性抗剪强度参数反演方法未能考虑岩土参数的随机性和不确定性对边坡稳定性的影响,文中将可靠度分析方法和极限分析上限法相结合,提出一种简单、实用的滑坡强度参数可靠度反演新方法,并通过工程应用实例验证了该方法的可行性和有效性. 结果表明,该方法不仅考虑了岩土参数的随机性和不稳定性,还可解决单一滑动面的强度参数反演计算问题. 同时,文中还分析了相关系数对滑坡抗剪强度参数反演结果及可靠度的影响,发现抗剪强度参数的互相关性会导致可靠度指标趋于保守.

关键词: 滑坡, 抗剪强度参数, 反演分析, 极限分析上限法, 可靠度理论, 相关性

Abstract: As the traditional deterministic back analysis methods fail to consider the influence of randomness and uncertainty of geotechnical parameters on the slope stability,a new parameter back analysis method with simplicity and practicality,which combines the upper bound method of limit analysis with the reliability theory,is proposed.Then,the feasibility and effectiveness of the proposed method are verified through an engineering application case.The results show that the proposed method not only takes into account the uncertainties and instability of the geotechnical parameters but also helps to implement the back calculation of the shear strength parameters of a slid- ing surface.Meanwhile,the effects of the correlation of shear strength parameters on the back analysis results and the reliability are analyzed,finding that ignoring the mutual-correlation between parameters may lead to a conserva- tive reliability index.

Key words: landslide, shear strength parameter, back analysis, upper bound limit analysis, reliability theory, correlation