土工基础

土工基础 ›› 2022, Vol. 36 ›› Issue (6): 946-951.

• 专题论述 • 上一篇    下一篇

多因素作用下山区公路滑坡变形特征的离散元数值分析

方留杨1，2，4，刘天逸2，陈贺1,4，潘远阳3，赵鑫1,4，叶咸1,4，王海1   

  1. （1.云南省交通规划设计研究院有限公司，昆明 650200；2.昆明理工大学，昆明 650031；3.成都理工大学，成都 610059；4.云南省数字交通重点实验室(筹)，昆明 650000）
  • 收稿日期:2022-08-08 修回日期:2022-09-14 出版日期:2022-12-31 发布日期:2022-12-28
  • 作者简介:方留杨（1987-），男，博士，高级工程师,研究方向为交通灾害防治。
  • 基金资助:
    云南省交通运输厅2019年科技创新管理咨询研究项目（2019301）、云南省数字交通重点实验室项目（项目编号：202205AG070008）、交通运输部科技示范工程（2017-09）、云南省交通规划设计研究院有限公司科技项目（ZL-2021-03）、交通运输部2021年度交通运输行业重点科技项目清单项目（2021-MS4-105）

DEM Analysis of the Deformation Characteristics of a Highway Landslide in Mountain Area Induced by Multiple Factors

FANG Liuyang1,2,4, LIU Tianyi2, CHEN He1,4, PAN Yuanyang3, ZHAO Xin1,4, YE Xian1,4， WANG Hai1   

  1. (1.Broadvision Engineering Consultants, Kunming 650200；
    2.Kunming University of Science and Technology, Kunming 650031；
    3.Chengdu University of Technology, Chengdu 610059；
    4.Yunnan Key Laboratory of Digital Communications (Under Construction), Kunming 650000)
  • Received:2022-08-08 Revised:2022-09-14 Online:2022-12-31 Published:2022-12-28

摘要： 为弄清多因素作用下山区公路滑坡的变形特征，利用离散单元法可模拟大变形、破坏过程等。通过强度折减和整体施加地震时程曲线的方式表征了降雨和地震外界因素，模拟了香丽高速公路岩羊村滑坡的变形过程，分析了降雨和地震工况下滑坡体的变形特征。结果表明：岩羊村滑坡无大规模的变形破坏及深层滑动迹象，主要表现为局部变形，与真实环境下坡体的变形特征相吻合；降雨条件下坡体变形较集中，变形量较大，地震条件下坡体变形分散，量值较小；数值计算结果可为岩羊村滑坡的防治提供理论支撑，也可为同类滑坡的模拟分析提供借鉴。


关键词: 岩羊村滑坡, 变形特征, 离散元, 多因素

Abstract: To investigate the deformation characteristics of a highway landslides in the mountain area induced by multiple factors, the DEM numerical method with the advantages of simulating large deformation and failure process was established. The rainfall and earthquake induced effects were characterized by the strength reduction and application of full course seismic time history. The deformation process of the Yanyang Village landslide located in the highway from Shangri-La to Lijiang was also simulated. The deformation characteristics were analyzed under the condition of rainfall and earthquake. The results demonstrate that there are no signs of large-scale deformation failure and deep-seated sliding presented at the Yanyang Village landslide, except for the local and surficial deformation, which are in good agreement with the actual deformation features observed. The deformation is more concentrated and larger under the condition of rainfall than that under the condition of earthquake. The numerical results not only can be used to provide the theoretical support for the Yanyang Village landslide, and also can be used to provide a reference for landslides with the similar geological conditions.

Key words: Yanyang Village Landslide, Deformation Characteristics, Discrete Element Method, Multiple Factors

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