摘要
黄冈地区崩滑流等地质灾害较为发育,尤其以滑坡数量偏多。按地域划分,英山、罗田两县地质灾害发育密度较大,全域主要呈点多、面广、规模小的发育特点。截至2018年底,登记在册的地质灾害隐患点共756处(滑坡422处),多为小型土质片麻岩滑坡,险情、灾情主要为小型。然而,2016年7月4日发生在蕲春大同的两河口村八组滑坡,非同寻常,相当典型。不仅规模大、险情等级高,而且表现出类似“高速远程滑坡—碎屑流”的特点。针对该滑坡,进行调查测绘与勘察设计等工作,通过分析滑坡的工程地质特征,借助软件Geo Studio、Abaqus与PFC 2D,分析孕灾因素、启动机制、运移特征及成因机理,推测滑坡的成因机理为降雨诱发,其中滑坡段运动机理为降雨引发,碎屑流段运动机理为能量转化传递。通过研究能够为黄冈地区今后的地质灾害防治工作提供可参考的依据。
In Huanggang area,landslides and other geological disasters are relatively developed,especially the number of landslides is relatively large.According to the regional division,the development density of geological disasters in Yingshan and Luotian counties is relatively high,and the whole area is characterized by many points,wide areas and small scale.By the end of 2018,there are 756 registered potential geological disasters(422 landslides),mostly small-scale soil gneiss landslides,risks and disasters are mainly small-scale.However,eight groups of landslides occurred on July 4,2016 in Lianghekou Village,Datong,Qichun,which are unusual and quite typical.It is not only large in scale and high in danger level,but also similar to“high-speed long-distance landslide-debris flow”.Aiming at the landslide,based on the investigation,mapping and survey design,through analyzing the engineering geological characteristics of the landslide,and with the help of software Geo Studio,Abaqus and PFC 2D,the disaster-pregnant factors,start-up mechanism,migration characteristics and genesis mechanism are analyzed.The study can provide a reference basis for future geological disaster prevention and control work in Huanggang area.It is speculated that the formation mechanism of landslide is induced by rainfall,in which the movement mechanism of landslide section is caused by rainfall and the movement mechanism of debris flow section is energy transformation and transmission.
作者
邹浩
陈金国
蔡恒昊
訚遥
陈兵
胡熙霖
雷兰
Zou Hao;Chen Jinguo;Cai Henghao;Yin Yao;Chen Bing;Hu Xilin;Lei Lan(Third Geological Brigade of Hubei Geological Bureau,Huanggang,Hubei 438000)
出处
《资源环境与工程》
2019年第S01期43-51,69,共10页
Resources Environment & Engineering
基金
湖北省地质局科技项目——鄂东黄冈地区堆积层滑坡孕灾机理研究(项目编号:KJ2019-18)
关键词
高速远程
滑坡
碎屑流
变质岩
孕灾
High speed and long-distance
landslide
debris flow
metamorphic rock
disaster-pregnant
