基于跨孔电阻率CT的污染阻隔帷幕性能检测

马新民; 毛德强; 闫利刚; 刘登峰; 李书鹏; 张家铭; Alex Furman; 王京

doi:10.13205/j.hjgc.202308024

基于跨孔电阻率CT的污染阻隔帷幕性能检测

doi: 10.13205/j.hjgc.202308024

1. 山东大学土建与水利学院, 济南 250061;
2. 北京中岩大地环境科技有限公司, 北京 100043;
3. 北京建工环境修复股份有限公司, 北京 100015;
4. 以色列理工学院土木与环境工程系, 以色列海法 32000

基金项目:

科技部国家重点研发计划“场地土壤污染成因与治理技术”重点专项(2019YFC1804900)

详细信息

作者简介:
马新民(1995-),男,博士,主要研究方向为水文地球物理。maxmkzx@mail.sdu.edu.cn

通讯作者:
毛德强(1981-),男,教授,主要研究方向为水文地球物理和水文地质模型参数识别。maodeqiang@sdu.edu.cn

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出版历程
- 收稿日期: 2022-09-13
- 网络出版日期: 2023-11-15

PERFORMANCE ASSESSMENT OF CONTAMINATION BARRIER CURTAIN BASED ON CROSS-BOREHOLE ELECTRICAL RESISTIVITY TOMOGRAPHY （CT）

1. School of Civil Engineering, Shandong University, Jinan 250061, China;
2. Beijing Zhongyan Earth Environment Technology Co., Ltd., Bejing 100043, China;
3. Beijing Construction Engineering Group Environmental Remediation Co., Ltd., Beijing 100015, China;
4. Civil and Environmental Engineering, Technion-Israel Institute of Technology, Haifa 32000, Israel

摘要

摘要: 为克服传统钻孔取样和常规阵列测量的跨孔电阻率法在帷幕检测工作中的不足,采用阵列优化方法对3种常规跨孔电阻率阵列进行优选,构建了高分辨率和高信噪比的阻隔帷幕测量组合阵列。采用数值模拟方法对该组合阵列进行阻隔帷幕检测效果验证,并应用于某垃圾填埋场的阻隔帷幕性能检测。根据垃圾填埋场2处阻隔帷幕的跨孔电阻率CT探测结果得出:膨润土阻隔帷幕主体在固结初期表现为均匀完整的低阻带,电阻率为0.001~0.06 Ω·m,2处阻隔帷幕的注浆影响半径分别为0.55,0.95 m,满足帷幕厚度和完整性要求。结合阻隔帷幕芯样的渗透系数测试分析得出:2个测量区域阻隔材料渗透系数均<10^-6 cm/s,满足污染阻隔的性能要求。利用组合阵列的跨孔电阻率CT技术,实现对污染场地阻隔帷幕完整性和防渗性能的高效准确评价。
- 跨孔电阻率CT /
- 阵列优选 /
- 地电模拟 /
- 污染阻隔 /
- 渗透系数
Abstract: In this study, an optimized combination array with high resolution and signal-to-noise ratio was constructed from three conventional arrays of cross-borehole electrical resistivity to compensate for the shortcomings of sampling and electrical resistivity tomography with conventional arrays in curtain detection. The combined array was verified by numerical simulation for barrier curtain detection. It was applied to the barrier curtain detection of a landfill. The detection results of the two barrier curtains at the landfill showed that the main body of the barrier curtain possessed a uniform and complete low resistance zone at the early stage of consolidation, ranging from 0.001 to 0.06 Ω·m, and the grouting influence radius of the two barrier curtains were 0.55 m and 0.95 m, which met the requirements of curtain thickness and integrity. Combined with the hydraulic test of the core samples, it indicated the structure of the curtain barrier material in the two measurement areas was complete. The hydraulic conductivities were less than 10^-6 cm/s, meeting the hydraulic conductivity performance requirements for the contamination barrier. This study uses cross-borehole electrical resistivity tomography with the combined array to realize the efficient evaluation of the integrity and anti-seepage performance of the barrier curtain in the contaminated site.
- cross-borehole electrical resistivity tomography /
- array optimization /
- geoelectric simulation /
- contamination barrier /
- hydraulic conductivity

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