院报 ›› 2018, Vol. 35 ›› Issue (7): 89-93.DOI: 10.11988/ckyyb.20170068

• 岩土工程 • 上一篇    下一篇

考虑非线性强度的无限长土坡渐进变形模拟

朱宝强1a,1b, 周成1a,1b,2, 李红梅3, 谭昌明4   

  1. 1.四川大学 a.水电学院;b.水力学与山区河流开发保护国家重点实验室,成都 610065;
    2.南京水利科学研究院 水利部土石坝破坏机理与防控技术重点实验室, 南京 210024;
    3.深圳市益田集团股份有限公司, 深圳 518053;
    4.四川省交通运输厅公路规划勘察设计研究院,成都 610041
  • 收稿日期:2017-01-17 出版日期:2018-07-01 发布日期:2018-07-12
  • 通讯作者: 周 成(1970-),男,江苏赣榆人,教授,博士,主要从事环境岩土工程方面的研究。E-mail:czhou@scu.edu.cn
  • 作者简介:朱宝强(1992-),男,河北保定人,硕士研究生,主要从事环境岩土工程方面的研究。E-mail:10849859276@qq.com
  • 基金资助:
    国家自然科学基金项目(51579167);水利部公益性行业专项(201301022);水利部土石坝破坏机理与防控技术重点实验室开放基金项目(YK915003)

Simulation of Progressive Deformation along Infinite-length Soil Slope in Consideration of Nonlinear Strength

ZHU Bao-qiang1,2, ZHOU Cheng1,2,3, LI Hong-mei4, TAN Chang-ming5   

  1. 1.College of Water Resource & Hydropower, Sichuan University, Chengdu 610065, China;
    2.State KeyLaboratory of Hydraulics and Mountain River Engineering,Sichuan University, Chengdu 610065, China;
    3.Key Laboratory of Failure Mechanism and Safety Control Techniques of Earth Rock Dam of the Ministryof Water Resources, Nanjing Hydraulic Research Institute, Nanjing 210024, China;
    4.Shenzhen YitianReal Estate Group Co., Ltd., Shenzhen 518053, China;
    5.Highway Planning Survey Design ResearchInstitute of Sichuan Province Communications Department, Chengdu 610041, China
  • Received:2017-01-17 Online:2018-07-01 Published:2018-07-12

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摘要： 利用平面应变条件下均质无限长土坡坡土的应力分量,考虑坡土破坏的非线性特征,借鉴黏塑性理论过应力模型,通过拟定坡土滑移速度与黏塑性应变率之间的关系式,基于Cam-Clay模型推导出非线性Mohr-Coulomb破坏准则下坡土滑移速度和位移的显式表达式。针对2个边坡实例进行计算分析,结果表明:计算值与边坡实测数据和前人的研究成果吻合良好;非线性破坏准则的3个强度参数对无限长土坡的渐进变形有显著影响,随着非线性参数c0减小、m增大、σt减小,边坡渐进变形逐渐增大,剪切层深度也不断增加。

关键词: 无限长土坡, 渐进变形, 非线性破坏准则, 过应力模型, 解析解

Abstract: The shear stress of homogeneous slope soil with infinite length under plane strain condition is obtainedand a nonlinear strength is incorporated into the overstress creep model. With Cam-clay model, the explicit expres-sions of slope soil’s sliding velocity and displacement are deducted following Mohr-Coulomb failure criterion by establishing the relationship between velocity or displacement and visco-plastic strain rate of the slope soil. Numerical calculation results agree with the field measured data. Parametric study on the nonlinear strength is also performed to investigate their influences on the creep or progressive deformation of soil slope. It is found that the progressive deformation of slope and thickness of shear zone both increase with the decrease of nonlinear parameters c0 and σt and the increase of parameter m.

Key words: soil slope with infinite length, progressive deformation, nonlinear failure criterion, overstress model, analytical solution

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