高密度电法在黄土-泥岩接触面滑坡勘察中的应用

王磊; 李孝波; 苏占东; 常晁瑜; 彭达

doi:10.12090/j.issn.1006-6616.2019.25.04.052

高密度电法在黄土-泥岩接触面滑坡勘察中的应用

doi: 10.12090/j.issn.1006-6616.2019.25.04.052

防灾科技学院, 北京 101601

基金项目:

中央高校基本科研业务费专项创新团队资助计划项目 ZY20160101

廊坊市科技支撑计划项目 2017013154

详细信息

作者简介:
王磊(1988-), 男, 博士、讲师, 从事地质灾害和工程物探方面的科研和教学。E-mail:wangallen88@126.com

中图分类号: P642.22
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- 被引次数: 0
出版历程
- 收稿日期: 2018-11-05
- 修回日期: 2019-05-21
- 刊出日期: 2019-08-28

APPLICATION OF HIGH-DENSITY ELECTRICAL METHOD IN LOESS-MUDSTONE INTERFACE LANDSLIDE INVESTIGATION

Institute of Disaster Prevention, Beijing 101601, China

摘要

摘要: 受特殊的地质地貌和大地构造背景影响，历史上多次强震在宁夏西吉县诱发了大量的黄土-泥岩接触面滑坡，给当地人民生命财产安全带来严重威胁。因此，探明这类滑坡的地层结构、基岩面埋深及空间展布情况，对进一步开展黄土-泥岩接触面滑坡的形成机理和危险性评价研究具有重要意义。文章利用高密度电法对宁夏西吉县苏堡村滑坡进行探测，并结合钻孔资料进行了验证。勘察结果表明：电阻率参数能够很好的反应研究区的地层分布特征，表层疏松干燥的黄土为高阻反映，随着埋深增加，含水量较大的黄土呈现出低阻反映，在黄土与泥岩接触带饱水区呈现低阻反映。高密度电法在黄土-泥岩接触面滑坡勘察中具有较好的适应性，能为进一步分析滑坡机理和防治提供可靠的地球物理依据。
- 宁夏西吉县 /
- 滑坡 /
- 高密度电法 /
- 资料解释
Abstract: Due to special geological conditions and regional geotectonic settings, several strong earthquakes occurred in Xiji county, Ningxia province in history, which induced a large number of loess-mudstone interface landslides, and brought serious threat to the safety of local people's life and property. Therefore, it is of great significance to explore the formation mechanism and risk assessment of loess-mudstone interface landslides by studying the formation structure, depth of bedrock and spatial distribution of such landslides. By using the high-density method, the stratum structure in the slope area was detected, and the survey results were validated by the bore hole columnar section. The observations of the resistivity well reflected the stratigraphy distribution. The loose and dry loess in the surface has high electrical resistance, and drops down with water content increases. The contact zone of mudstone and loess is saturated, which has low electrical resistance. This research proves that high density electrical method has good adaptability in loess-mudstone interface landslide investigation, which can provide reliable geophysical basis for further analysis of landslide mechanism and prevention.
- Xiji County in NingXia /
- landslide /
- high-density electrical method /
- data interpretation
注释:

责任编辑：吴芳

HTML全文

图 1 高密度电法数据采集、处理流程图

Figure 1. Data collection and processing flow chart of the high density resistivity method

下载: 全尺寸图片幻灯片

图 2 西吉县震湖乡附近区域地质图

Figure 2. Regional geological map near the Zhenhu Town area in Xiji County

下载: 全尺寸图片幻灯片

图 3 苏堡村滑坡全貌(红色虚线处为滑坡边界，镜向SE)

Figure 3. General view of Subaocun Landslide (red dotted line camera towards SE)

下载: 全尺寸图片幻灯片

图 4 苏堡村滑坡测线布置图

Figure 4. Layout of measuring line in Subaocun Landslide

下载: 全尺寸图片幻灯片

图 5 苏堡村滑坡物探主测线L1电阻率色谱断面图

Figure 5. The resistivity chromatographic profile of the main geophysical measuring line in Subaocun Landslide

下载: 全尺寸图片幻灯片

图 6 苏堡村滑坡物探横测线L2电阻率色谱断面图

Figure 6. The resistivity chromatographic profile of geophysical measuring line L2 in Subaocun Landslide

下载: 全尺寸图片幻灯片

图 7 苏堡村滑坡物探横测线L3电阻率色谱断面图

Figure 7. The resistivity chromatographic profile of geophysical measuring line L3 in Subaocun Landslide

下载: 全尺寸图片幻灯片

图 8 电法揭示的苏堡村滑坡剖面

Figure 8. The profile map of Subaocun Landslide through the electrical method

下载: 全尺寸图片幻灯片

图 9 勘察钻孔揭示的岩芯柱状图

Figure 9. Columnar section revealed by bore holes

下载: 全尺寸图片幻灯片

表 1 地层岩性电性特征表

Table 1. Electrical parameters of different rocks

地层岩性		电阻率范围/(Ω·m)
黄土	干旱区	80~1000
	多雨区	100~200
	地下水含盐碱时	5~30
粉质黏土		10~300
砂质泥岩		10~100
泥质砂岩		10~1000

下载: 导出CSV

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