西南红层地区地质灾害发育规律与成灾模式--以云南彝良县为例  

Developing law and disaster modes of geohazards in red bed region of southwestern China:A case study of Yiliang County of Yunnan Province

作　　者：徐伟 冉涛[2] 田凯 XU Wei;RAN Tao;TIAN Kai(State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology,Chengdu,Sichuan 610081,China;Chengdu Center,China Geological Survey,Chengdu,Sichuan 610081,China)

机构地区：[1]成都理工大学地质灾害防治与地质环境保护国家重点实验室,四川成都610081 [2]中国地质调查局成都地质调查中心,四川成都610081

出　　处：《中国地质灾害与防治学报》2021年第6期127-133,共7页The Chinese Journal of Geological Hazard and Control

基　　金：中国地质调查局地质调查项目(DD20190640);国家自然科学基金项目(41977252);四川省青年科技创新研究团队专项计划项目(2017TD0018)。

摘　　要：红层区边坡的变形破坏引发的地质灾害类型多、数量大,造成的人员伤亡和财产损失较大。以彝良县红层地区地质灾害为研究对象,结合实地调查,对彝良县红层边坡变形破坏所引发的49处不稳定斜坡、150处滑坡、53处崩塌进行了统计分析,总结了发育规律及特征。对不同斜坡结构下的红层边坡的成灾模式及破坏过程进行了分析,红层顺向边坡常见破坏模式为滑移-拉裂式;横向边坡常见破坏模式为崩解-冲刷式;反向坡、斜向坡的常见破坏模式为软岩崩解剥落-硬岩卸荷拉裂坠落式。研究可为彝良县等红层发育地区的地质灾害防治和管理提供一定的技术支持和参考。The deformation and destruction of slope in red bed area frequently cause many types and large quantities of geological hazards,resulting in large casualties and property losses.Taking the geological hazards in the red bed area of Yiliang county as the research object,the overall developing laws and characteristics of the geohazards were statistically analyzed based on a detailed field survey of 49 unstable slopes,150 landslides,and 53 rockfalls.Then,the disaster modes and failure process of slopes under different models of slope srtuctures are carried out systematically.The failure mode of consequent slopes are sliding-cracking modes,the failure mode of transverse slopes are disintegrating and scouring mode,the failure mode of reverse and oblique slopes are soft rock disintegration and peeling-hard rock cracking and falling.The research can provide some technical support and reference for the prevention and management of geological disasters in other red bed areas.

关 键 词：红层 地质灾害 发育规律 成灾模式 

分 类 号：TU443[建筑科学—岩土工程]