不同降水作用下渗流岩质公路边坡安全稳定性研究  

Research on security and stability of seepage rock highway slope under different precipitation

作　　者：李雅婧 冯文林 II Yajing;FENG Wenlin(Faculty of Architectural Engineering,Jiaozuo College of Industry and Trade Qinyang 454550,Henan,China;School of Cil and Environmental Engineering,Harbin Institute of Technology(Shenzhen),Shenzhen 518055,Guangdong,China)

机构地区：[1]焦作工贸职业学院建筑工程学院,河南沁阳454550 [2]哈尔滨工业大学(深圳)土木与环境工程学院,广东深圳518055

出　　处：《工程建设》2025年第3期18-24,共7页Engineering Construction

基　　金：国家自然科学基金青年科学基金资助项目(51304068)。

摘　　要：降雨产生的渗流会降低公路边坡的稳定性,进而引发各种边坡灾害,影响公路的安全运营。因此,如何有效保障降水条件下公路边坡的稳定性显得尤为重要。本文以云茂高速公路风化岩质雨水渗流边坡为例,采用数值模拟手段对不同水力梯度下的加固边坡稳定性进行研究,揭示边坡变形及安全性的变化规律。研究结果表明:1)边坡的水平和垂直位移均随水力梯度的增加而增加,不同位置的位移变化受水力梯度的影响程度差异显著;2)水力梯度对滑面水平滑移特性影响显著;3)安全系数随水力梯度的增加呈指数函数减小,当水力梯度增大时,边坡稳定性急剧下降,滑坡灾害的风险随之大幅增加。本文成果可为渗流边坡支护设计和稳定性预测供借鉴与参考。The seepage caused by rainfall can reduce the stability of highway slopes,and then cause various slope disasters and affect the safe operation of highways.Therefore,it is particularly important to effectively ensure the stability of highway slope under precipitation conditions.The weathered rocky rainwater seepage slope of Yunmao expressway is taken as an example,numerical simulation methods are used to study the stability of the reinforced slope under different hydraulic gradients,and the change law of slope deformation and safety is revealed.The results show that:1)The horizontal and vertical displacement of the slope increase with the increase of hydraulic gradient,and the displacement change of different positions is significantly affected by the hydraulic gradient;2)The hydraulic gradient has a significant effect on the horizontal slip characteristics of the sliding surface;3)The safety factor decreases exponentially with the increase of hydraulic gradient,and when the hydraulic gradient increases,the stability of the slope decreases sharply,and the risk of landslide disaster increases significantly.The results can be used as a reference for the design and stability prediction of seepage slope support.

关 键 词：渗流岩质边坡 水力梯度 稳定性演化 安全系数 变形发展 数值分析 

分 类 号：TU973.23[建筑科学—结构工程]