基于时频多次压缩变换的地质雷达隧道超前预报方法研究  

Research on Prognosis Method of Ground Penetrating Radar Tunnel Based on Time-frequency Multisqueezing Transformation

作　　者：郑伟 田仁飞[1] 孙广凯 Zheng Wei;Tian Renfei;Sun Guangkai(College of Geophysics,Chengdu University of Technology,Chengdu Sichuan 610059,China;Geological Exploration and Geotechnical Engineering Design and Research Institute,China Railway Eryuan Engineering Group Co.,Ltd.,Chengdu Sichuan 610031,China)

机构地区：[1]成都理工大学地球物理学院,四川成都610059 [2]中铁二院工程集团有限责任公司地勘岩土工程设计研究院,四川成都610031

出　　处：《工程地球物理学报》2025年第1期99-108,共10页Chinese Journal of Engineering Geophysics

基　　金：国家自然科学基金(编号:41304080)。

摘　　要：为了提高隧道超前地质预报的准确性,以有效预防施工中可能出现的围岩坍塌、局部塌方以及地下水涌出等地质灾害,本次研究综合运用地质雷达法、正演模拟和时频分析等技术,以全面识别并直观地展示隧道掌子面前方的围岩情况。并将时频多次压缩变换应用到地质雷达信号处理中,与传统的时频方法进行对比分析。研究结果表明,时频多次压缩变换可以准确地对包含谐波和冲击样式组分的非平稳信号进行分类,并同时描述其时频特性;该方法还能显著提升地质雷达的分辨率,使其能够准确识别出厚度在2.0~3.6 m之间的岩溶异常体,进而更有效地划分薄层地质异常体的边界面。这为隧道地质超前预报提供了强有力的技术支撑,显著提高了预报的精确度,也为地质雷达处理解释提供了丰富的经验和有价值的参考。In order to enhance the accuracy of tunnel advanced geological prediction and effectively prevent potential geological disasters such as surrounding rock collapses,localized landslides,and groundwater inrushes during construction,this study comprehensively utilizes techniques including ground penetrating radar(GPR),forward modeling,and time-frequency analysis.These methods are employed to comprehensively identify and visually present the conditions of the surrounding rocks ahead of the tunnel face.Additionally,the technique of time-frequency multisqueezing transformations(TFMST)is applied to the processing of GPR signals,and a comparative analysis is conducted with traditional time-frequency methods.The research findings indicate that the TFMST can accurately classify non-stationary signals containing harmonic and impulsive components while describing their time-frequency characteristics.This method also significantly improves the resolution of GPR,enabling it to precisely identify karst anomalies with thicknesses ranging from 2.0 meters to 3.6 meters,and thereby more effectively delineating the boundaries of thin geological anomalies.This provides robust technical support for tunnel geological forecasting,markedly enhancing prediction accuracy,and offers valuable experience and references for the interpretation and processing of GPR data.

关 键 词：隧道超前预报 地质雷达探测法 正演模拟 时频分析 时频多次压缩变换 

分 类 号：P631.3[天文地球—地质矿产勘探]