土工基础

土工基础 ›› 2022, Vol. 36 ›› Issue (5): 701-704.

• 工程实录 • 上一篇    下一篇

降雨强度对川藏公路102滑坡群2#滑坡体影响

史海平1，李文炜2，李中尧1，王 毅1，赵哲苇1，李家欢1，王保田2，王培清1   

  1. （1.西藏农牧学院水利土木工程学院，西藏林芝 860000；2.河海大学岩土工程研究所，南京 210098）
  • 收稿日期:2021-04-13 修回日期:2021-04-22 出版日期:2022-10-30 发布日期:2022-10-24
  • 通讯作者: 王培清（1972-），男，教授，博士，主要从事岩土工程及土木工程试验研究。
  • 作者简介:史海平（1992-），男，硕士研究生，研究方向为粗颗粒土力学性质。
  • 基金资助:
    西藏自治区自然基金重点项目（XZ2019ZRG-56 (Z)）；西藏农牧学院第四批柔性人才引进项目（藏东南地区粗颗粒混合土力学性质研究）

Effect of Rainfall Intensity on the 2# Landslide of Sichuan-Tibet Highway 102 Landslide Groups

SHI Haiping1, LI Wenwei2, LI Zhongyao1, WANG Yi1, ZHAO Zhewei1, LI Jiahuan1, WANG Baotian2， WANG Peiqing1   

  1. (1.Department of Water Conservancy and Civil Engineering, Tibet Agricultural and Animal Husbandry University, Linzhi 860000；2.Institute of Geotechnical Engineering, Hohai University, Nanjing 210098)
  • Received:2021-04-13 Revised:2021-04-22 Online:2022-10-30 Published:2022-10-24

摘要： 为了研究降雨强度对102滑坡群2#滑坡体塑性应变与位移影响，在渗流～应力耦合机理的基础上，利用ABAQUS有限元数值软件建立滑坡体简化模型，模拟不同降雨强度条件下，相同降雨时间后滑坡体的塑性应变与位移变化。数值分析结果表明：在降雨历时相同的前提下，随着降雨强度的增大，塑性应变与位移均增加，降雨强度为12 mm·d-1、24 mm·d-1、36 mm·d-1时，滑坡体塑性应变与位移变形较小，边坡处于稳定状态，降雨强度为48 mm·d-1时，6 d以后边坡塑性应变迅速增大，形成塑性贯通区域，滑坡体失稳从而发生滑坡。


关键词: 渗流-应力耦合, 塑性应变, 位移变形, 滑坡体失稳

Abstract: In order to study the effect of the rainfall intensity on the 2# Landslide body of Sichuan-Tibet Highway Route 102 landslide groups on plastic strain and displacement, this paper presents a simplified numerical landslide model established by using ABAQUAS finite element software. In the numerical analysis, the seepage-stress coupling method was used to simulate the plastic strain and displacement in landslide body different rainfall intensity but the same duration conditions. Numerical analysis results show that, under the same rainfall duration, with the increase in rainfall intensity, the plastic strain and displacement increase. Under the rainfall intensity of 12mm/day, 24mm/day, 36mm/day, respectively, the plastic strain and displacement in the landslide body are small. When the slope is under a steady state with the rain intensity of 48mm/day, and the plastic strain is rapidly increased after 6 days. A continuous plastic strain zone was formed in the potential landslide body and the slope instability was occurred.


Key words: Seepage-Stress Coupling, Plastic Strain, Displacement and Deformation, Landslide Instability

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