AN ANALYSIS OF ACCURACY IMPROVEMENT FOR TGP TUNNEL GEOLOGICAL PREDICTION SYSTEM
WANG Xiao-chuan, KANG Yong, XIA Bin-wei
Key Laboratory for the Exploitation of Southwestern Resources and the Environmental Disaster Control Engineering of Ministry of Education, Chongqing University, Chongqing 400030, China
According to the principle of TGP tunnel geological prediction system and the problem existent in the process of detection, this paper has discussed some abnormal-signal-induced factors such as external pulse signal interference, current interference, poor coupling, pipe wave and charging parameters in the data collection, and analyzed the cause of resultant errors with the feedback from engineering application. On such a basis, some suggestions were put forward on improving the understanding of anomalous seismic wave and geological work as well as edge diffraction wave for avoiding the abnormal signal generation and reception. It is concluded that the collection of reliable data is an essential and efficient way to improve the accuracy of TGP system data interpretation.
[1] 王晓川,卢义玉,夏彬伟,等. 超前地质预报在大相岭隧道施工中的应用［J］.重庆大学学报,2009,32(10):1174-1180.[2] Cremer F, De Jong W.Klamer schutte fusion of polarimetric infrared features and GPR features for landmine//The International Workshop on Advanced Ground Penetrating Radar (IWAGPR).Netherlands: Delft,,2003:1-6.[3] 宋先海,顾汉明,肖柏勋.我国隧道地质超前预报技术述评［J］.地球物理学进展, 2006,21(2):605-615.[4] 曲海峰,刘志刚,朱合华. 隧道信息化施工中综合地质预报技术［J］.岩石力学与工程学报,2006,25(6):1 241-1 251.[5] 王梦恕. 对岩溶地区隧道施工水文地质超前预报的意见［J］. 铁道勘查, 2004(1):7-9.[6] Button E, Bretterebner H, Schwab P.The application of TRT-true reflection tomography at the Unterwald tunnel in Felsbau.［J］. Geophysics,2002,20(2):51-56.[7] Shou K J. A three-dimensional hybrid boundary element method for nonlinear analysis of a weak plane near an underground excavation［J］.Tunneling and Underground Space Technology,2005,15(2):215-226.[8] 赵永贵,蒋辉,赵晓鹏. TSP203超前预报技术的缺陷与TST技术的应用［J］.地球物理学进展, 2008,5(3):266-273.[9] 刘云帧. TGP隧道地震波预报系统与技术［J］.物探与化探,2009,33(2):170-177.[10] 原小帅,张庆松,许振浩,等.TSP 超前地质预报异常地震波信号［J］.山东大学学报:工学版,2009,39(4):53-56.[11] 单娜琳,程志平,刘云祯.工程地震勘探［M］.北京:冶金工业出版社,2006.
