河道岩溶勘察并行电法多维成像技术应用研究

发布时间：2018-03-23 16:47

本文选题：水利工程　切入点：并行电法　出处：《重庆交通大学学报(自然科学版)》2017年10期

【摘要】：针对江山港岩溶区某段河道内可能存在的隐伏溶蚀体,提出了采用拟地震化供电方式且同步采集海量数据的并行电法为主要探测技术手段,并结合钻孔揭露资料,分析了岩溶体在河道两岸下方的平面展布,进一步预测河床底部区地层的构造特征。试验研究表明:二维视电阻率断面揭示出整个测线控制区域的岩溶体的二维分布,有效地勾勒出溶蚀洞体在垂面上的埋深、大小及规模等信息;考虑到两岸溶洞在河床底部的关联性问题,提取不同深度的电阻率立体化切片,直观地显示出河道两岸溶洞在垂向上分布高程不一、大小差异明显以及右岸溶洞在河床内延展但并未贯通至左岸的特点,研究成果为流域综合治理以及后期运行维护提供科学地技术支撑。
[Abstract]:In view of the hidden solution in a section of river channel in the karst area of Jiangshan Port, a parallel electrical method, which uses the quasi-seismic power supply mode and synchronously collects the massive data, is proposed as the main technical means of detecting and combining with the disclosing data of the borehole. The horizontal distribution of karst bodies under the banks of the river is analyzed, and the structural characteristics of the strata in the bottom area of the river bed are further predicted. The experimental study shows that the two-dimensional apparent resistivity section reveals the two-dimensional distribution of the karst bodies in the control area of the whole survey line. The information of the depth, size and scale of the cave on the vertical surface is effectively outlined, and the resistivity sections of different depths are extracted considering the correlation between the two sides of the cave at the bottom of the river bed. It can be seen intuitively that the vertical distribution of karst caves on both sides of the river is different, the difference in size is obvious, and the right bank caves extend in the river bed but are not connected to the left bank. The research results provide scientific and technical support for comprehensive watershed management and later operation and maintenance.
【作者单位】：浙江省水利河口研究院;浙江广川工程咨询有限公司;浙江省水利防灾减灾重点实验室;温州工程勘察院有限公司;温州龙达围垦开发建设有限公司;
【基金】：水利部技术示范项目(SF-201725) 浙江省省属科研院所专项计划(2014F50016) 浙江省水利河口研究院院长基金项目(ZIHE2016014) 浙江省科技厅重点计划研发项目(2017C03008);浙江省科技厅院所扶持专项项目(2016F50003) 浙江省水利厅科技计划项目(RC1543)
【分类号】：P631.3;TV221

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