摘要
为了查明与通州某建设新区深部岩溶发育有关的地质条件,提供必要的地质基础数据,在研究区开展了抗干扰编码电法勘探。针对研究区强电磁背景干扰,开展了试验分析,优化了采集参数,最终共获得560个测点数据。对原始数据进行精细处理,选取典型剖面进行2D反演,在此基础上,对研究区覆盖层厚度、基岩发育特征及断裂构造走向等进行了综合推断解释,取得了较好的应用效果。部分解释成果与已有钻孔资料吻合,为通州深部岩溶塌陷分析提供了地球物理依据。
In order to investigate the geological conditions related to the deep karst development areas in Tongzhou, and provide the basic geological data, a coded electrical method with anti-interference in the study area is used. In view of the strong electromagnetic background, especially in the high urbanization region where results in the low exploration precision, the optimum acquisition parameters are selected and the testing data from 560 measuring points are obtained. After the data processing and the 2D inversion, the thickness of the overburden layer, the karst development features and the fault occurrence are comprehensively interpreted, and some interpretation results are consistent with the existing borehole data, which provide the geophysical basis for the analysis of the deep karst collapses in Tongzhou.
出处
《工程勘察》
2018年第2期71-78,共8页
Geotechnical Investigation & Surveying
基金
中国地质调查局项目(12120114033901)
通州城市副中心地区重大地质问题调查与评价项目(PXM2016_158203_000008)
关键词
抗干扰
电阻率测深
岩溶
张家湾断裂
伪随机
anti-interference
resistivity sounding
karst
Zhangjiawan fault
pseudo random signal
