天水市麦积区幅黄土滑坡发育分布特征及其孕灾因素分析

田尤; 杨为民; 黄晓; 刘廷; 李浩; 向灵芝; 程小杰

天水市麦积区幅黄土滑坡发育分布特征及其孕灾因素分析

田尤^{1, 2,},
杨为民^1, ,,
黄晓³,
刘廷^{1, 2},
李浩^{1, 2},
向灵芝⁴,
程小杰¹

1.
中国地质科学院地质力学研究所, 北京 100081
2.
中国地质大学地球科学与资源学院, 北京 100083
3.
河北师范大学汇华学院, 石家庄 050091
4.
重庆交通大学, 重庆 400074

基金项目:

中国地质调查局"西秦岭北缘断裂带天水段地震地质灾害调查评价"项目 12120114035601

详细信息

作者简介:
田尤(1991-), 男, 硕士研究生, 矿物学与灾害地质研究方向。E-mail:tianyou2013@yeah.net

通讯作者:
杨为民(1965-), 男, 研究员, 博士, 从事地质灾害、工程地质及活动断裂研究工作。E-mail:snon_72@163.com

中图分类号: P642.22
计量
- 文章访问数: 282
- HTML全文浏览量: 119
- PDF下载量: 21
- 被引次数: 0
出版历程
- 收稿日期: 2015-04-15
- 刊出日期: 2016-03-01

DISTRIBUTION CHARACTERISTICS AND INDUCING FACTORS OF LOESS LANDSLIDE IN MAIJI MAPPABLE UNIT, TIANSHUI

TIAN You^{1, 2
,},
YANG Wei-min^{1
, ,},
HUANG Xiao³,
LIU Ting^{1, 2},
LI Hao^{1, 2},
XIANG Ling-zhi⁴,
CHENG Xiao-jie¹

1.
Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China
2.
School of Geosciences and Resources, China University of Geosciences, Beijing 100083, China
3.
College of Huihua, Heibei Normal University, Shijiazhuang 050091, China
4.
Chongqing Jiaotong University, Chongqing 400074, China

摘要

摘要: 基于野外调查和室内资料综合整理, 对天水市麦积区幅范围内438处体积大于1×10⁴ m³的黄土滑坡进行了分类统计对比分析。研究结果表明, 麦积区幅内黄土滑坡具有空间上发育不均衡, 时间上多期活动的特点, 表现为区域上黄土滑坡分布不均匀, 各区域滑坡体平均厚度差异大, 滑坡多沿沟谷呈不对称带状分布, 滑坡多发育在坡度为15°—30°斜坡上等。受地质构造、地形地貌、地层岩性等环境地质条件控制, 幅内滑坡主要是因地震和降雨诱发形成。
- 麦积区幅 /
- 黄土滑坡 /
- 分类 /
- 分布特征 /
- 诱发因素
Abstract: According to field investigation and lab data statistics, a statistical classification is conducted on 438 loess landslides in which the volume is more than 1×10⁴ m³ in MaiJi mappable unit.It shows that the characteristics of loess landslides are asymmetrical development in space and multiple stages in time. It is mainly reflected in the following ways: the distribution of loess landslides is inhomogeneous in regional, many differences appear in the average thickness of landslide in each region, landslides distribution is banded asymmetrical along the valleys, most landslides develop on the slopes with 15°—30°. Loess landslides in the MaiJi mappable unit are controlled by geological structure, topography and formation lithology. And Loess landslides are majorly induced by rainfall and earthquake.
- MaiJi mappable unit /
- loess landslides /
- classification /
- distribution characteristics /
- inducing factor

HTML全文

图 1 天水地区主要活动断裂及地震分布图(据文献[21]修编)

Figure 1. Main active faults and earthquakes in Tianshui area

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图 2 麦积区幅黄土滑坡发育类型统计

Figure 2. Different kinds of loess landslide in MaiJi mappable unit

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图 3 麦积区幅黄土滑坡灾害发育分布图

Figure 3. Distribution of loess landslide in MaiJi mappale unit

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图 4 后沟右岸滑坡群(镜向SE)及其平面图

Figure 4. Landslide group on the right bank of Hougou

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图 5 麦积区幅内各区域黄土滑坡滑坡体平均厚度对比

Figure 5. Average loess landslides thickness comparison of different area in MaiJi mappable unit

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图 6 研究区地形坡度与滑坡的关系

Figure 6. Relationship between topographic slope with loess landslides

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图 7 麦积区幅内第一、二、三期次滑坡

Figure 7. Landslides in Maiji mappable unit formed in three different times

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图 8 窑店村西不同期次的滑坡切割及嵌套(镜向NW)

Figure 8. Cut and containment relation of landslide in West Yaodian

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图 9 研究区上覆黄土与基座泥岩构成的特殊二元结构

Figure 9. Overlying loess and basement mudstone double layered structure in the study area

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图 10 天水市麦积区降雨诱发浅层滑坡

Figure 10. Rainfall-induced landslide in MaiJi mappable unit

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