基于响应面法的砂质黄土路堑高边坡稳定性研究  

Research on stability of high slope of sandy loess road cutting based on response surface method

作　　者：周东波 梅源[1,2] 杨彤 ZHOU Dongbo;MEI Yuan;YANG Tong(School of Civil Engineering,Xi’an University of Architecture and Technology,Xi’an Shaanxi 710055,China;Shaanxi Key Laboratory of Geotechnical and Underground Space Engineering,Xi’an Shaanxi 710055,China)

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]陕西省岩土与地下空间工程重点实验室,陕西西安710055

出　　处：《中国安全生产科学技术》2024年第7期139-147,共9页Journal of Safety Science and Technology

基　　金：国家自然科学基金项目(52178302);陕西省重点研发计划项目(2020SF-373)。

摘　　要：为给砂质黄土路堑高边坡设计提供参考,以甘肃某山区砂质黄土路堑高边坡为工程依托,采用强度折减法研究坡高、坡率和台阶高度对边坡安全系数的影响规律,在此基础上采用响应面法,以边坡安全系数为基准对黄土路堑高边坡坡形进行优化设计。研究结果表明:边坡稳定安全系数(F S)与单级坡高呈负相关关系,与单级坡率、台阶宽度呈正相关关系;坡形参数对边坡F S影响程度为:台阶宽度>单级坡高>单级坡率;基于回归模型方程给出的数值解得到不同坡高(H)条件下的最优坡形设计方案。研究结果可为西北砂质黄土高边坡稳定性设计和针对性治理提供理论基础。In order to provide reference for the design of high slope of sandy loess road cutting,taking the high slope of sandy loess road cutting in a mountainous area of Gansu province as the engineering support,the strength reduction method was used to study the influence of slope height,slope ratio,and step height on the safety factor of slope.On this basis,the response surface method was used to optimize the design of high slope shape of the loess road cutting with the safety factor of slope as benchmark.The results show that the safety factor of slope stability is negatively correlated with the slope height of single stage,and is positively correlated with the slope ratio of single stage and the step width.The influence degree of slope shape parameters on slope F S is as follows:step width>slope height of single stage>slope ratio of single stage.Based on the numerical solution provided by the regression model equation,the optimal design scheme of slope shape under different slope heights(H)is obtained.The research results can provide a theoretical basis for the stability design and targeted treatment of high slopes in northwest sandy loess.

关 键 词：响应面法 强度折减法 砂质黄土 路堑 高边坡 安全系数 

分 类 号：X947[环境科学与工程—安全科学]