甘肃庄浪县大庄镇小湾村不稳定斜坡影响机制研究  

Study on the influence mechanism of unstable slope in Xiaowan Village,Dazhuang Town,Zhuanglang County,Gansu Province

作　　者：范鹏举[1] FAN Pengju(Geological Survey Institute of Gansu Province,Lanzhou 730000,Gansu,China)

机构地区：[1]甘肃省地质调查院,甘肃兰州730000

出　　处：《资源信息与工程》2022年第6期53-55,59,共4页Resource Information and Engineering

基　　金：甘肃省科技计划资助(甘肃省重点研发计划)(21YF5NA040)。

摘　　要：为研究不稳定斜坡失稳影响机制及危害形式,文章选取陇东黄土高原比较有代表性的庄浪县大庄镇小湾村不稳定斜坡作为研究对象。在了解该地区地质环境条件的基础上,分析了组成不稳定斜坡的5个变形体的特征,认为引起不稳定斜坡失稳的因素主要有:马兰黄土节理裂隙大规模发育,有利于雨水的下渗,短时间集中的强降水可能会引起坡体的坍塌和溜塌;人类活动对坡体坡脚的开挖以及老坡体的蠕动等。斜坡失稳可能出现的危害方式主要体现为不稳定斜坡变形破坏后的冲击、掩埋、塌陷和坡面汇水的冲蚀。In order to study the mechanism of instability and the forms of hazard,the unstable slope in Xiaowan village,Dazhuang Town,Zhuanglang County,which is representative in Loess Plateau of eastern Gansu Province,was selected as the research object.Based on the geological environment conditions in the area,the paper analyzed the characteristics of the five deformation bodies.The main factors that may cause the instability of unstable slope are as follows:The large⁃scale development of Loess Joint Fissures in Mâlan County causing the rainfall infiltration,and the short⁃term concentrated heavy rainfall causing the collapse and slide of the slope;the excavation of the slopetoe;and the creeping of the old slope by human activities.The possible hazards of slope instability are mainly embodied in the impact,burial,collapse and erosion after deformation and failure of unstable slope.

关 键 词：不稳定斜坡 斜坡失稳 变形体 地质灾害 

分 类 号：P642.27[天文地球—工程地质学]