Research on the measurement of interfacial polarization voltage by the extrapolation method
MO Wan-Ling1, SUN Zhong-Hua1, XU Ya2, ZHAO Bin2
1. School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China; 2. School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
Abstract:It is of practical value to measure the interfacial polarization voltage for improving the sensitivity of BEAM advanced detection method used in TBM tunnel. However, it is difficult for conventional methods to measure the interfacial voltage between solid rock mass and electrode accurately. In order to measure the interfacial voltage, the authors propose an extrapolation measurement method in this paper. The proposed method consists of a sample tube and a number of equally spaced electrodes. Sinusoidal alternating current is exerted on both sides of the sample tube. The AC complex voltages of every electrode are measured. According to the geometrical relationship between the electrodes, the interface voltage of the two power supply electrodes can be obtained by extrapolation. Experimental results indicate that the interfacial polarization voltage between clay and metal electrode can be successfully measured by the proposed method. When abnormal body such as charcoal or water hole exists in the sample tube, the polarization rate change of the measured rock-soil can be greatly raised by subtracting the interfacial polarization voltage from the total voltage. Therefore, the sensitivity of tunnel advance detection can be improved by this method.
莫婉玲, 孙中华, 徐娅, 赵斌. 界面极化电压的外推法测量研究[J]. 物探与化探, 2017, 41(3): 484-488.
MO Wan-Ling, SUN Zhong-Hua, XU Ya, ZHAO Bin. Research on the measurement of interfacial polarization voltage by the extrapolation method. Geophysical and Geochemical Exploration, 2017, 41(3): 484-488.
[1] Yazdani-Chamzini A, Yakhchali S H. Tunnel boring machine (TBM) selection using fuzzy multicriteria decision making methods[J].Tunnelling and Underground Space Technology, 2012, 30: 194-204. [2] Mooney M A, Walter B, Frenzel C. Real-time tunnel boring machine monitoring: a state of the art review[Z].NAT, 2012: 1-9. [3] 张谷鹏. TBM施工技术及其工程应用分析[J].河南水利与南水北调,2015,10:18-19. [4] Lee K H, Seo H J, Park J, et al. A probabilistic assessment of ground condition prediction ahead of TBM tunnels combining each geophysical prediction method[J].Korean Tunnelling and Underground Space Association, 2016, 18(3): 257-272. [5] Arnim K, Thomas K. Geoelectric pre-prospecting method[P].Germany, DE 19842975B4, 2004-01-29. [6] Kaus A, Boening W. BEAM-geoelectrical ahead monitoring for TBM-drives[J]. Geomechanics and Tunnelling,2008, 1(5):442-449. [7] Kopp T. Real-time monitoring of geological conditions during mechanized tunneling by means of BEAM4 methods[C]// 1st EasternEuropean Tunnelling Conference, 2012. [8] 朱劲,李天斌,李永林,等. Beam超前地质预报技术在铜锣山隧道中的应用[J].工程地质学报,2007,15(2): 258-263. [9] 李金铭.激发极化法方法技术指南[M].北京:地质出版社,2004:23-26. [10] 刘永辉.电化学测试技术[M].北京:航空学院出版社,1987:276-279. [11] 傅良魁.激发极化法[M].北京:地质出版社,1982:47-51. [12] 蔡柏林.井中激发极化法[M].北京:地质出版社,1983:91-93. [13] 王星明,郭栋,李嘉. 水资源勘查中综合电法勘探方法技术与应用[J].物探与化探, 2011, 35(1): 65-69. [14] 周蜜,王建国,黄松波,等. 土壤电阻率测量影响因素的试验研究[J].岩土力学,2011,32(11):3269-3275. [15] 孙树林,李方,谌军. 掺石灰黏土电阻率试验研究[J].岩土力学,2010,3l(1):51-55.