多级旋转黄土滑坡基本类型及特征分析

李滨; 殷跃平; 吴树仁; 石菊松

多级旋转黄土滑坡基本类型及特征分析

李滨^1,2,
殷跃平³,
吴树仁^1,2,
石菊松^1,2

1.
国土资源部新构造运动与地质灾害重点实验室北京 100081;
2.
中国地质科学院地质力学研究所北京 100081;
3.
中国地质环境调查局北京 100081

基金项目:

国家十一五科技支撑项目(2006BAC04B00),中国地质科学院地质力学研究所基本科研项目(DZLXJK201010), 中国地质科学院基本科研业务费项目(2010-SYS-18)

详细信息

作者简介:
李滨,地质工程专业.Email: libin1102@163.com

中图分类号: P642.22
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出版历程
- 收稿日期: 2011-03-05
- 修回日期: 2011-08-11
- 刊出日期: 2011-10-25

BASIC TYPES AND CHARACTERISTICS OF MULTIPLE ROTATIONAL LANDSLIDES IN LOESS

1.
Key laboratory of Neotectonic and Goehazard,Ministry of Land Resources,Beijing 100081;
2.
Institute of Geomechanics,Chinese Academy of Geological Science,Beijing 100081;
3.
China Institute Geo-Ernironment Monitoring,Beijing 100081

摘要

摘要: 多级旋转黄土滑坡因其分布密集、继发性强、滑体结构难以区分而成为我国黄土高原最为复杂的滑坡灾害类型。本文在引入多级旋转滑坡的定义的基础上,通过野外详细调查和工程勘察等手段,研究我国黄土高原地区典型的多级旋转黄土滑坡的基本类型、特征和成因。提出了金台型多级旋转黄土滑坡和黑方台型多级旋转黄土滑坡2种滑坡模式和滑坡结构特征,其中,金台型多级旋转黄土滑坡主要包括超深层的旋转-平移型滑坡和深层旋转滑坡2种类型,滑体由近水平层状厚层黄土、高阶地砾石层和上新世的红色砂质硬黏土层组成,多属于大型滑坡; 黑方台型多级旋转黄土滑坡主要包括中浅层旋转黄土层内滑坡和顺层多级旋转黄土-泥岩滑坡2种类型。同时分析这类滑坡主要诱发因素:新构造运动、河流的侧蚀、地层结构、灌溉以及季节性冻融作用,其中地下水的作用是目前最主要诱发因素。本文分析为该类滑坡成因机理进一步研究奠定基础。
- 多级旋转黄土滑坡 /
- 基本类型 /
- 结构特征 /
- 成因
Abstract: Due to concentrated distribution,strong secondary and complex structure,multiple rotational landslides in loess is one of the most complicated landslide hazard types in the loess plateau.At first,this paper gives a definition of multiple rotational landslides in loess.So,it further studies the typical basic types,the characteristics and causes of multiple rotational landslides in the loess plateau of China in terms of hazards survey,geotechnical investigation and survey.Two types of multiple rotational loess landslides are the type of Jintai and the type of Heifangtai.They have different failure mechanisms and structures.The Jintai type of the landslides includes two classes of deep-seated multiple rotational-translational landslide and deep-seated multiple rotational landslide.The Heifangtai type of the landslides has mainly two classes of middle-shallow rotational loess landslides and multiple rotational bedding loess-mudstone landslides.The Jintai landslides are mostly large-scale landslides,composed by the three strata: near-horizontal thick layer pleistocene loess,gravel layer upper pleistocene terrace and pliocene red-hard clay.The analysis indicates that triggers of multiple rotational loess landslides include neotectonic movement,lateral erosion,strata lithology and structure,irrigation and seasonally freezing and thawing.Among the triggers,groundwater is the most inducing factor.The paper lays the foundation for mechanism study of multiple rotational loess landslides.
- Multiple rotational landslides /
- Loess /
- Mechanism /
- Structure characteristics

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参考文献(1)

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