摘要
岩土体是组成斜坡地质结构的基本单元,斜坡地质结构类型与地质灾害的发育类型密切相关。店子街幅图幅调查范围内主要发育软弱-较坚硬层状泥岩、砂岩岩组,风积黄土单层土体,粉土、砂砾卵石双层土体,粉土、碎石和基岩碎屑多层土体等4类岩土体,这些不同的岩土体组成了6种不同的斜坡地质结构,进而演变形成了不同类型、不同规模的斜坡地质灾害。黄土斜坡结构和黄土—冲洪积层斜坡结构多演变发生小型滑坡灾害、黄土—泥岩斜坡结构多演变发生中—大型黄土泥岩滑坡灾害、泥岩与泥质砂岩互层斜坡结构多演变发生崩塌灾害、泥岩风化堆积层斜坡结构和滑坡堆积层斜坡结构多演变发生小-中型滑坡灾害。研究不同斜坡地质结构与地质灾害发育类型的发育关系,有助于进一步开展区域崩塌、滑坡形成机理研究,研究成果有助于洮河下游地质灾害防治工作的展开,并为地方政府科学制定地质灾害防灾减灾规划提供了技术支持。
Rock and soil mass are the basic units of slope geological structure,and the types of slope geological structure are closely related to the types of geological disasters.In the survey area of Dianzijie,four types of rock and soil are mainly developed,including soft-relatively hard layered mudstone and sandstone rock group,Aeolian Loess single-layer soil mass,double-layers soil mass of silt,gravel and pebble,multi-layers soil mass of silt,gravel and bedrock rock block.These different rock and soil mass form six different slope geological structures,and then evolve into different types and scales of slope geological disasters harm.The loess slope structure and the Loess alluvial proluvial layer slope structure mostly evolves into small-scale landslide disaster,the Loess mudstone slope structure mostly evolves into medium-sized and large-scale loess mudstone landslide disaster,the mudstone and argillaceous sandstone interbedded slope structure evolves into collapse disaster,the mudstone weathering accumulation layer slope structure and the landslide accumulation layer slope structure mostly evolves into small-sized landslide disaster.The study on the relationship between the geological structure of different slopes and the development types of geological disasters is beneficial for the further study relate to the formation mechanism of regional collapse and landslide,the research results are favourable for the prevention and control of geological disasters in the downstream of Taohe River,and play a guiding role in the work of prevention and mitigation for local governments.
作者
李松
王立朝
刘德玉
LI Song;WANG Li-chao;LIU De-yu(The Second Institute of Geological and Mineral Exploration,Gansu Provincial Bureau of Geology and Mineral Exploration and Development,Lanzhou 730020,China;Gansu Hydrogeological and Engineering Geology Investigation Institute,Lanzhou 730020,China;Consultative Center of Geo-Hazard Mitigation,MNR,Beijing 100081,China;Geological Environment Monitoring Institute of Gansu Province,Lanzhou 730050,China)
出处
《甘肃地质》
2021年第1期90-97,共8页
Gansu Geology
基金
中国地质调查局“洮河流域中游地质灾害调查”(DD-20190645)项目资助。
关键词
岩土体
斜坡地质结构
地质灾害
防灾减灾
rock and soil mass
geological structure of the slope
geological disasters
disaster prevention and mitigation
Dianzijie
