电磁波CT技术在城市隧道岩溶勘查工程中的应用

彭军; 李期佳; 高建华; 王鹏; 熊友亮

doi:10.15953/j.ctta.2022.184

电磁波CT技术在城市隧道岩溶勘查工程中的应用

doi: 10.15953/j.ctta.2022.184

1.
水利部长江勘测技术研究所, 武汉430011
2.
武汉市政工程设计研究院有限责任公司, 武汉430023

详细信息

通讯作者:
男，水利部长江勘测技术研究所工程师，主要从事工程物探与工程检测技术研究及应用，E-mail：710157841@qq.com

中图分类号: P 631
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- 被引次数: 0
出版历程
- 收稿日期: 2022-09-19
- 修回日期: 2022-10-25
- 录用日期: 2022-11-19
- 网络出版日期: 2023-01-03
- 刊出日期: 2023-07-31

Application of Electromagnetic Waves for Karst Exploration in Urban Tunnels

1.
Changjiang Institute of Survey Technical Research, MWR, Wuhan 430011, China
2.
Wuhan Municipal Engineering Design and Research Institute Co. Ltd., Wuhan 430023, China

摘要

摘要: 随着城市发展过程越来越快，交通与环境的矛盾日益突出，为了保全地面建筑物，采用隧道方案也越来越多。城市岩溶探测以钻探为主，再辅以高密度电法、浅层地震反射法等传统物探方法，这些方法效率低，且受场地条件限制，很难实施。电磁波CT技术作为近些年发展起来的地球物理探测技术，具有分辨率高、野外作业便利等优势，可以较好的揭露地下岩溶发育规模及特征。本文在传统的数据处理基础上，运用电磁波CT探测技术，通过反演设置最低限值、选用反射投影结果作为初始模型、利用低通滤波和角度限制技术和采取连续测线模式架构程序进行归一化计算处理等处理技术方法，大大提高电磁波CT资料解译的精确度。研究表明，电磁波CT探测技术在岩溶勘查中有很好的应用效果，探测结果对于城市隧道工程建设具有较大的指导意义。
- 电磁波CT /
- 城市隧道 /
- 岩溶探测
Abstract: With rapid urbanization, the contradiction between traffic and the environmental pollution caused by it is becoming increasingly prominent. To preserve ground buildings, an increasing number of tunnel schemes are adopted. Urban Karst exploration is based on drilling, supplemented by traditional geophysical methods such as high-density electrical method and shallow seismic reflection method, which are inefficient and difficult to implement owing to site conditions. As a geophysical exploration technology developed in recent years, electromagnetic wave technology has the advantages of high resolution and convenient field operation, which can better reveal the development scale and characteristics of underground Karst. Based on traditional data processing, setting the minimum value, choosing the reflection projection result as the initial model, using the low-pass filtering and angle-limiting technology, and adopting the structure program of continuous survey mode to carry out normalized calculation processing can greatly improve the accuracy of electromagnetic wave CT data interpretation. The findings of this study show that the electromagnetic wave detection technology can be applied effectively in Karst exploration, and its detection results have great guiding significance in urban tunnel engineering.
- electromagnetic wave CT /
- urban tunnel /
- Karst exploration

HTML全文

图 1 电磁波透视射线网格化分布图

Figure 1. Grid distribution of electromagnetic wave perspective rays

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图 2 电磁波CT共发射点数据采集示意图

Figure 2. Data acquisition diagram of electromagnetic CT common emission point

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图 3 电磁波CT剖面布置图

Figure 3. Section layout of electromagnetic wave CT

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图 4 YRK98～YRK110剖面联合反演成果图

Figure 4. Joint inversion results of YRK98～YRK110 profiles

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图 5 YRK267～YRK279剖面联合反演成果图

Figure 5. Joint inversion results of YRK267～YRK279 profiles

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图 6 YRK98～YRK110剖面地质解释成果图

Figure 6. Geological interpretation results of YRK98～YRK110 profiles

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图 7 YRK267～YRK279剖面地质解释成果图

Figure 7. Geological interpretation results of YRK267～YRK279 profiles

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图 8 YRK103～YRK274剖面联合反演成果图

Figure 8. Joint inversion results of YRK103～YRK274 profiles

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图 9 YRK103～YRK274剖面地质解释成果图

Figure 9. Geological interpretation results of YRK103～YRK274 profiles

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