综合物探方法在城市隐伏断裂探测中的应用

doi:10.11720/wtyht.2021.1525

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摘要

成都市主城区存在多条隐伏断裂,而断裂的准确位置和分布情况尚不明确,这对成都市地下空间资源综合科学开发利用和城市建设规划布局优化造成极大安全隐患。为此,针对工区内的包江桥隐伏断裂采用了微动、高密度电阻率法、瞬变电磁法和土壤氡气测量这4种方法进行综合探测,不仅查明了测线位置的地层结构,而且还获得了包江桥隐伏断裂的位置、性质、产状和规模等参数。本次探测工作表明,采用综合物探方法进行城市隐伏断裂探测可以获得更好的效果。

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	刘伟
	黄韬
	王庭勇
	刘怡
	张继
	刘文涛
	张琦斌
	李强

关键词 ：城市地质, 隐伏断裂, 微动探测, 高密度电阻率法, 瞬变电磁法, 土壤氡气测量, 综合物探

Abstract：

The existing geological data show that there are several buried faults in the main urban area of Chengdu. However, the specific location and distribution of these faults are still unclear, which poses great security risks to the comprehensive and scientific exploitation and utilization of underground space resources and the optimization of urban construction planning and layout in Chengdu. In view of such a situation, four geophysical methods, namely, micromotion survey, high-density electrical method, transient electromagnetic method and soil radon measurement, were used in this paper to comprehensively explore the buried Baojiangqiao fault in the work area. The integrated geophysical prospecting methods not only identified the stratigraphic structure along the survey line, but also obtained the location, property, attitude and scale of the buried Baojiangqiao fault. This work indicates that the integrated geophysical prospecting methods can achieve better results in the exploration of urban buried fault.

Key words： city geology concealed fault microtremor survey high-density electrical method transient electromagnetic method soil radon measurement integrated geophysical method

收稿日期: 2020-11-23 修回日期: 2021-04-26 出版日期: 2021-08-20

ZTFLH:

P631

基金资助:四川省科技计划项目(2019YJ0595);中国地质调查局项目“成都多要素城市地质调查”(DD20189210)

作者简介: 刘伟(1988-),男,毕业于西南石油大学,主要从事地球物探勘探工作及数据处理方法研究。Email: davidliuwei@163.com

引用本文:

刘伟, 黄韬, 王庭勇, 刘怡, 张继, 刘文涛, 张琦斌, 李强. 综合物探方法在城市隐伏断裂探测中的应用[J]. 物探与化探, 2021, 45(4): 1077-1087.
LIU Wei, HUANG Tao, WANG Ting-Yong, LIU Yi, ZHANG Ji, LIU Wen-Tao, ZHANG Qi-Bin, LI Qiang. The application of integrated geophysical prospecting methods to the exploration of urban buried fault. Geophysical and Geochemical Exploration, 2021, 45(4): 1077-1087.

链接本文:

https://www.wutanyuhuatan.com/CN/10.11720/wtyht.2021.1525 或 https://www.wutanyuhuatan.com/CN/Y2021/V45/I4/1077

Fig.1 测线布置及推测断层平面分布

Table 1 工区地层物性参数统计

Fig.2 土壤氡气数据处理流程

Fig.3 L1测线物探成果

Table 2 L1测线推断地层结构信息

Table 3 L1测线解释断层参数

Fig.4 L2测线物探成果

Table 4 L2测线推断的地层结构信息

Table 5 L2测线解释断层参数

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