黏性土边坡临界滑动面确定的新方法  

A new method for determining critical slip surface of cohesive soil slope

作　　者：张爱卿 李金云 单炜 郭颖 ZHANG Ai-qing;LI Jin-yun;SHAN Wei;GUO Ying(College of Architectural Engineering,North China Institute of Aerospace Engineering,Langfang 065000,China;Institute of Cold Regions Science and Engineering,Northeast Forestry University,Harbin 150040,China)

机构地区：[1]北华航天工业学院建筑工程学院,河北廊坊065000 [2]东北林业大学寒区科学与工程研究院,黑龙江哈尔滨150040

出　　处：《兰州理工大学学报》2023年第6期114-118,共5页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(41641024);廊坊市科学技术研究与发展计划自筹经费项目(2019011048)。

摘　　要：为了提出一种可操作性强的黏性土边坡临界滑动面确定方法,在研究简易贯入试验原理的基础上,建立简易贯入次数与边坡承载力的关系式,结合某公路边坡实例,开展简易贯入试验,绘制边坡承载力随深度的变化曲线,从曲线中搜索边坡承载力的突变点,将突变点标记在边坡横剖面图中并连线,依此确定出边坡临界滑动面.将试验所得结果与有限元法和理论方法结果进行对比,验证简易贯入法的可行性和合理性.研究结果表明:简易贯入法适用于黏性土边坡临界滑动面的确定,且可以快速准确地确定出黏性土边坡临界滑动面,为黏性土边坡稳定性分析提供了新的方法.In order to propose a method for determining the critical slip surface of cohesive soil slope with strong operability,based on the principle of simple penetration test and the research results of standard penetration times and foundation bearing capacity,the relationship between the number of simple penetrations and bearing capacity of the slope is established.Combined with a road slope example,measuring points was arranged and the number of simple penetrations was measured on the slope.The bearing capacity of the slope at different depths was calculated and the curve of slope bearing capacity with depth was drawn,in which the sudden change of the bearing capacity of the slope was searched for and its curve was obtained to determine the critical slip surface of the slope.The results of the paper are compared with the results by the finite element method and theoretical method to verify the feasibility and rationality of the simple penetration method.The results show that the simple penetration method is suitable for the determination of the critical slip surface of cohesive soil slope,and it can quickly and accurately determine the critical slip surface of clayey soil slopes,which provides a new method for the stability analysis of cohesive soil slopes.

关 键 词：简易贯入试验 黏性土 临界滑动面 边坡工程 承载力 

分 类 号：TU43[建筑科学—岩土工程]