抗滑挡墙加固小型滑坡墙背推力研究  

Study on the Back Thrust of a Small Landslide Wall Reinforced by a Slip-resistant Retaining Wall

作　　者：刘剑光[1] 郁智超 吴羿君 张润泽 LIU Jianguang;YU Zhichao;WU Yijun;ZHANG Runze(China Railway Eryuan Engineering Group Co.,Ltd.,Chengdu 610031,China;School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China;CCCC Second Highway Consultants Co.,Ltd.,Wuhan 430056,China)

机构地区：[1]中铁二院工程集团有限责任公司,成都610031 [2]西南交通大学土木工程学院,成都610031 [3]中交第二公路勘察设计研究院有限公司,武汉430056

出　　处：《路基工程》2024年第1期124-129,共6页Subgrade Engineering

摘　　要：以西南山区某小型村寨滑坡为对象,采用数值模拟方法,研究抗滑挡墙墙背滑坡推力的分布形式,并引入正交试验,采用极差分析法探讨多物理参数对滑坡推力的影响。结果表明:抗滑挡墙墙背滑坡推力的分布曲线为“鼓肚形”,在靠近坡面一定范围内滑坡推力趋于零;滑带黏聚力、内摩擦角的折减系数及抗滑挡墙埋深对滑坡推力的影响较大;抗滑挡墙埋深对作用点高度的影响较大;滑坡推力作用点介于挡墙底部向上垂直高度20%~29%的位置,与刚体极限平衡法中的假设存在偏差。Relying on the small landslide in the southwest mountainous area as the object,using numerical simulation methods,the impact of multi-physical parameters on the landslide thrust is explored by the introduction of orthogonal tests and the use of range analysis method.The results show that:the distribution curve of landslide thrust after the wall of anti-slip retaining wall is"bulging belly",and the landslide thrust tends to be 0 within a certain range near the slope surface.The folding coefficient of the cohesion of the slip belt and the angle of internal friction and the depth of the anti-slip retaining wall have a greater influence on the size of landslide thrust.The depth of the anti-slip retaining wall has a greater influence on the height of the action point.The point of action of the landslide thrust is between 20%-29%of the upward vertical height of the bottom of the retaining wall,which is a deviation from the assumption in the rigid-body limit equilibrium method.

关 键 词：小型滑坡 抗滑挡墙 滑坡推力 正交试验 极差分析法 强度折减法 

分 类 号：U417.11[交通运输工程—道路与铁道工程]