渗流管涌是二元结构堤防最常见的破坏形式之一,高水位期准确查明堤防渗流通道对研究管涌演变规律和除险加固意义重大。基于此,提出堤防管涌通道微弱磁场信号检测技术,利用渗流水良导电性,向管涌口供人工电流,通过在堤防表面检测管涌通道导电回路产生的一次感应微弱磁场信号,快速判识管涌分布情况。采用数值计算分析管涌通道的弱磁场分布特征,针对微弱磁场信号检测难题,提出基于锁相放大法的弱磁信号提取方法和导线源同频干扰磁场校正方法,减少堤防起伏地形影响,增强微弱磁场信号能量。在鄱阳湖流域某堤防开展管涌探测现场试验,有效查明潜在管涌路径分布情况。该研究将有助于提高堤防管涌通道探测准确性,实现管涌险情的早发现早治理,为管涌险情应急处置提供技术支撑。
Abstract
Piping is a most common failure mode in binary structure dikes. Accurate detection of dike piping channels during high water levels is of great significance to the study of piping evolution and risk prevention and reinforcement project. This paper presents a technique for detecting weak magnetic field signals in embankment seepage channels. In the light of the conductivity of seepage water, an artificial electric current is supplied to the outlet of piping channel. By detecting the weak magnetic field signal generated by the conduction loop in the dike surface, the distribution of piping channel can be rapidly identified. The distribution characteristics of weak magnetic field in piping channel are analyzed by numerical calculations. To address the challenge of weak magnetic field signal detection, a method of extracting weak magnetic signal based on phase-locked amplification method and conductor source interference of the same frequency is proposed to reduce the influence of dike undulating terrain and enhance the energy of weak magnetic signal. Field tests of piping detection were carried out on a dike in Poyang Lake basin to find out the distribution of potential piping paths effectively. This study will contribute to improving the accuracy of detecting piping channel in dike, enabling early detection and mitigation of piping hazards, and providing technical support for emergency response of piping incidents.
关键词
堤防隐患 /
管涌通道 /
磁电阻率法 /
弱磁场特征 /
弱磁信号检测技术
Key words
hidden danger of dike /
piping channel /
Magnetometric Resistivity (MMR) method /
weak magnetic characteristics /
weak magnetic signal detection technology
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参考文献
[1] 周华敏, 肖国强, 周黎明, 等. 堤防隐患物探技术研究现状与展望[J]. 长江科学院院报, 2019, 36(12): 164-168.
[2] 吴庆华, 张 伟, 邬爱清, 等. 堤防管涌险情研究进展[J]. 长江科学院院报, 2019, 36(10): 39-44.
[3] 陈建生, 李兴文, 赵维炳. 堤防管涌产生集中渗漏通道机理与探测方法研究[J]. 水利学报, 2000, 31(9): 48-54.
[4] 冷元宝,黄建通,张震夏,等.堤坝隐患探测技术研究进展[J].地球物理学进展,2003,18(3):370-379.
[5] 郑灿堂. 应用自然电场法检测土坝渗漏隐患的技术[J]. 地球物理学进展, 2005, 20(3): 854-858.
[6] SJÖDAHL P, DAHLIN T, JOHANSSON S, et al. Resistivity Monitoring for Leakage and Internal Erosion Detection at Hällby Embankment Dam[J]. Journal of Applied Geophysics, 2008, 65(3/4): 155-164.
[7] 邓中俊.矩形小回线源三维瞬变电磁场响应特征及堤坝渗漏探测研究[D].北京:中国地质大学(北京),2015.
[8] 严太勇. 电法与地质雷达检测管涌通道[J]. 江淮水利科技, 2018(3): 47-48.
[9] 何继善. 堤防渗漏管涌“流场法”探测技术[J]. 铜业工程, 2000(1): 5-8.
[10] 房 瑞, 李帝铨, 吴 桐, 等. 基于拟流场法的堤坝管涌渗漏检测频率研究[J]. 工程地球物理学报, 2018, 15(4): 525-529.
[11] 王 宏, 牛兆伟, 张国栋, 等. 地面核磁共振方法在大坝安全检测中的试验研究[J]. CT理论与应用研究, 2015, 24(3): 367-376.
[12] 陈建生, 董海洲. 堤坝渗漏探测示踪新理论与技术研究[M]. 北京: 科学出版社, 2007.
[13] 石 明, 冯德山, 戴前伟. 综合物探方法在堤防质量检测中的应用[J]. 地球物理学进展, 2006, 21(4): 1328-1331.
[14] 白广明, 张耘菡, 刘晓波, 等. 有渗漏隐患黏土堤坝电阻率模拟试验及分析[J]. 黑龙江水利, 2017, 3(12): 12-19.
[15] 李文忠, 肖国强, 孙卫民, 等. 长江堤防土电阻率测试及其与含水率和密实度的相关性研究[J]. 长江科学院院报, 2019, 36(10): 131-134.
[16] 乔惠忠, 刘建伟, 段彦超, 等. 电法探测技术在荷兰堤防隐患探测中的应用[J]. 人民黄河, 2008, 30(10): 24-25, 34.
[17] 房纯纲,葛怀光,贾永梅,等.堤防渗漏隐患探测用瞬变电磁仪[J].水电与抽水蓄能,2001,25(5): 38-41.
[18] 邹声杰. 堤坝管涌渗漏流场拟合法理论及应用研究[D]. 长沙: 中南大学, 2009.
[19] 周华敏, 邬爱清, 肖国强, 等. 堤防渗漏通道弱磁探测技术及其磁场分布特征[J]. 长江科学院院报, 2023, 40(3): 98-104.
[20] JAKOSKY J J. Method and Apparatus for Determining Underground Structure: US1906271[P]. 1933-05-02.
[21] EDWARDS R N. The Magnetometric Resistivity Method and Its Application to the Mapping of a Fault[J]. Canadian Journal of Earth Sciences, 1974, 11(8): 1136-1156.
[22] EDWARDS R N,LEE H,NABIGHIAN M N.On the Theory of Magnetometric Resistivity (MMR) Methods[J]. Geophysics, 1978, 43(6): 1176-1203.
[23] STREET G J.MMR Surveys for the Location of Palaeochannels in the Eastern Goldfields,Western Australia[J]. Exploration Geophysics, 1989, 20(2): 123.
[24] MOGILATOV V S, KOZHEVNIKOV N O, ZLOBINSKY A V. Magnetic Measurements in Electrical Prospecting by Resistivity Methods[J]. Russian Geology and Geophysics,2018, 59(4): 432-437.
[25] GOLDMAN M, NEUBAUER F M. Groundwater Exploration Using Integrated Geophysical Techniques[J]. Surveys in Geophysics, 1994, 15(3): 331-361.
[26] KULESSA B, JAEKEL U, KEMNA A, et al. Magnetometric Resistivity (MMR) Imaging of Subsurface Solute Flow: Inversion Framework and Laboratory Tests[J]. Journal of Environmental and Engineering Geophysics, 2002, 7(3): 111-118.
[27] KOFOED V O, JESSOP M L, WALLACE M J, et al. Unique Applications of MMR to Track Preferential Groundwater Flow Paths in Dams, Mines, Environmental Sites, and Leach Fields[J]. The Leading Edge, 2011, 30(2): 192-204.
[28] KOFOED V.Making Accurate Groundwater Flow Models[J]. Pollution Engineering, 2013, 45(11): 22-26.
[29] 傅良魁. 磁激发极化法探矿理论的几个问题[J]. 地球物理学报, 1979, 22(2): 156-168.
[30] 翁爱华,刘云鹤,高丽娟,等.天然气水合物的磁电阻率响应特征[J]. 石油地球物理勘探,2009,44(增刊1):158-161, 168.
[31] ZHU K,YANG J.Time-dependent Magnetometric Resistivity Anomalies of Groundwater Contamination: Synthetic Results from Computational Hydro-Geophysical Modeling[J]. Applied Geophysics, 2008, 5(4): 322-330.
[32] 邓靖武. 磁电法正演理论研究[D]. 北京: 中国地质大学(北京), 2005.
[33] TSAI Y-J, CHOU Y-C, WU Y S, et al. Noninvasive Survey Technology for LNAPL-Contaminated Site Investigation[J]. Journal of Hydrology, 2020, 587: 125002.
[34] 杨建文, 任怀宗, 雷林源. 起伏地形条件下磁电阻率法的资料处理方法[J]. 中南矿冶学院学报, 1991, 22(1): 1-8.
[35] VU M T, JARDANI A, REVIL A, et al. Magnetometric Resistivity Tomography Using Chaos Polynomial Expansion[J]. Geophysical Journal International, 2020, 221(3): 1469-1483.
[36] 李斯睿. 地面磁电阻率法三维非线性反演研究[D]. 长春: 吉林大学, 2017.
[37] MAXWELL M, ESO R, OLDENBURG D. Using 2D and 3D Electrical Resistivity and Magnetometric Resistivity Techniques for Investigating Dam and Dike Soil Conditions for Leak Detection—Field Examples and Forward Modelling[C]//Symposium on the Application of Geophysics to Engineering and Environmental Problems 2013. Denver, Colorado. Environment and Engineering Geophysical Society, 2013: 821-821.
[38] ASTEN M W. The Down-Hole Magnetometric Resistivity (DHMMR) Method[J]. Exploration Geophysics, 1988, 19(1/2): 12-16.
[39] EDWARDS R N, NABIGHIAN M N. Magnetometric Resistivity Method[M]//Electromagnetic Methods in Applied Geophysics. Houston: Society of Exploration Geophysicists, 1991: 47-104.
基金
中央级公益性科研院所基本科研业务费项目(CKSF2023316/YT);国家自然科学基金青年基金项目(41702321)
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