基于灰色关联法的边坡稳定影响因子敏感度分析及应用  

Sensitivity Analysis and Application of Slope Stability Influencing Factors Based on Grey Correlation Method

作　　者：张国发[1] 张玉广[1] 邹启民 杨远翔 ZHANG Guofa;ZHANG Yuguang;ZOU Qimin;YANG Yuanxiang(Guizhou Transportation Planning Survey and Design Academe Co., Ltd., Guiyang 550001, China)

机构地区：[1]贵州省交通规划勘察设计研究院股份有限公司,贵阳550001

出　　处：《交通科技》2021年第6期77-81,共5页Transportation Science & Technology

摘　　要：通过对路堑边坡开挖过程中的稳定性影响因素分析,得出边坡受地层岩性、人为开挖,以及自然因素相关的6项影响因子。基于灰色关联法对边坡稳定性影响因子进行敏感度分析,以边坡稳定性的影响因子为子序列、稳定性系数为母序列建立敏感度分析模型,以确定边坡开挖过程中的关键影响因素。结合重遵扩容项目某路堑边坡工程实例,利用强度折减法分析岩土重度、黏聚力、内摩擦角、开挖坡高、边坡平台宽度,以及开挖坡比对边坡稳定性的单因素影响敏感度。结果表明,内摩擦角、黏聚力和平台宽度对边坡稳定性影响更为敏感。Through the analysis of the factors affecting the stability of the cutting slope in the process of excavation,six factors related to stratum lithology,artificial excavation and natural factors were obtained.The sensitivity analysis of the influencing factors of slope stability was carried out based on the grey correlation method,and the sensitivity analysis model was established by taking the influencing factors of slope stability as the subsequence and the stability coefficient as the parent sequence,so as to determine the key influencing factors in the process of slope excavation.Combined with a cutting slope engineering example of Chongqing-Zunyi expansion project,the sensitivity of single factors affecting the slope stability,such as rock and soil weight,cohesion,internal friction angle,excavation slope height,slope platform width and excavation slope ratio,was analyzed by strength reduction method.The results show that the internal friction angle,cohesion and platform width are more sensitive to the slope stability.

关 键 词：灰色关联法 边坡稳定性 敏感度分析 影响因子 

分 类 号：U416.14[交通运输工程—道路与铁道工程]