土工基础

土工基础 ›› 2025, Vol. 39 ›› Issue (5): 750-753.

• 专题论述 • 上一篇    下一篇

广西某路堑高边坡变形破坏过程数值分析

张红星1，冷先伦2，3   

  1. （1.河南省路桥建设集团有限公司，河南商丘 476000；
    2.中国科学院武汉岩土力学研究所 岩土力学与工程国家重点实验室，武汉 430071；3.中国科学院大学，北京 100049）
  • 收稿日期:2023-08-16 修回日期:2023-09-05 出版日期:2025-10-31 发布日期:2025-10-30
  • 通讯作者: 冷先伦（1980-），男，副研究员，研究方向为边坡变形破坏机理和灾害防治等。
  • 作者简介:张红星（1975-），男，工程师，研究方向为边坡工程安全与防治等。

Numerical Analysis of Deformation and Damage Process of a High Cutting Slope in a Guangxi Expressway

ZHANG Hongxing1, LENG Xianlun2,3   

  1. (1.Henan Road and Bridge Construction Group Co. Ltd., Shangqiu 476000;
    2.State Key Laboratory for Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, 
    Chinese Academy of Sciences, Wuhan 430071;
    3.University of Chinese Academy of Sciences, Beijing 100049)
  • Received:2023-08-16 Revised:2023-09-05 Online:2025-10-31 Published:2025-10-30

摘要： 为研究广西某路堑高边坡变形破坏过程和灾害机制，通过现场地质调查，确定了边坡所处环境的岩层、节理产状和变形破坏范围与模式，进而采用Phase2软件建立了能反映复杂地质特征的数值分析模型，研究了层面、节理控制下边坡的变形破坏特征。研究结果表明：顺倾节理是边坡变形失稳的主要地质因素、裂隙张裂进而降雨入渗是边坡变形破坏的主要诱因，灾变过程为开挖扰动节理张裂-降雨入渗-岩体弱化-节理张裂上移-变形破坏；施工扰动导致节理处于张裂状态，因锚杆支护作用，未在坡面发生变形破坏，此时边坡安全系数为1.07；降雨入渗导致强风化粉砂岩强度弱化，顺倾的J1节理进一步发生张裂和滑移，并形成一条沿层面与节理和岩层界面且贯通的剪切滑移带，最终在强风化与坡面相交处剪出。

关键词: 高边坡, 开挖扰动, 节理滑移, 变形破坏, 数值模拟

Abstract: To study the deformation and failure process and hazard occurrence mechanism of a high cutting slope in Guangxi is presented in this paper. The rock strata, joint occurrence and deformation as well as the failure range and mode of the slope environment were determined through on-site geological survey, and then Phase2 software was used to establish a numerical analysis model that can reflect complex geological characteristics. The deformation and failure characteristics of the slope under the control of bedding and joints were evaluated. The results show that the dip joint is the main geological factor of slope deformation and instability. The tension cracks and rainfall infiltrations are the main causes of slope deformation and failure. The hazard process is excavation disturbance-joint tension-rainfall infiltration-rock mass weakening-joint tension displacement-deformation and failure. The construction disturbance caused the joint to be in a state of tension crack. Due to the rock anchor support, the deformation and failure did not occur on the slope surface. At this time, the factor of safety of the slope was 1.07; the rainfall infiltration leads to the weakening of the strength of strongly weathered siltstone, and the J1 joint further cracks and slips, and forms a shear slip zone along the interface between the layer and the joint and rock layer, and finally cuts out at the intersection of strong weathering and slope.

Key words: High Slope, Excavation Disturbance, Joint Slip, Deformation Damage, Numerical Simulation

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