地震作用下土质边坡类型划分  

Type division of soil slopes under seismic action

作　　者：张江伟 李小军[2] 迟明杰[2] 刘辰[2] 

机构地区：[1]河北地质大学勘查技术与工程学院,中国石家庄050031 [2]中国地震局地球物理研究所,中国北京100081

出　　处：《地震学报》2017年第2期286-295,共10页Acta Seismologica Sinica

基　　金：国家自然科学基金项目(51639006;51421005);国家重点基础研究发展计划(973计划)(2011CB013601);中央级公益性科研院所基本业务费专项(DQJB15C07)共同资助

摘　　要：本文研究分析了多种因素对土质边坡地震稳定性的不同影响程度,认为影响作用较大的前8个因素分别为坡度、坡高、斜坡结构类型、降水、水系距离、黏聚力、内摩擦角和地震动参数.利用层次分析法计算各因素的影响权重,以综合性、操作性和适用性为原则,将影响权重较高的因素作为划分指标,将土质边坡划分为4大类,每大类中再根据坡度的大小划分为缓坡、缓陡坡、陡坡和急坡等4个亚类.划分结果可为地震作用下土质边坡稳定性的评价提供参考依据.The influence factors of soil slope seismic stability are multifarious and their impact extents are also various. In this study, we discuss the effect degree of each factor, and the results show that the key influence factors are slope grade, slope height, slope structure type, rainfall, drainage distance, cohesion force, internal friction angle and ground motion parameters. The method of analytic hierarchy process （AHP） is introduced into this research to determine the weight of each key factor. Based on integrity, operability and applicability, factors with higher weights, which partition the slopes into four types, are selected as the indexes of soil slope division, and each type is further classified into four sub-types according to slope gradients, including gentle slope, gentle steep slope, steep slope and more steep slope. The results can provide a reference basis for the stability evaluation of soil slope under seismic action.

关 键 词：地震 土质边坡 层次分析法 类型划分 

分 类 号：P315.9[天文地球—地震学]