基于探地雷达法的隧道破碎富水围岩带快速识别  

Rapid identification of broken and water-rich surrounding rock zones in tunnels based on ground-penetrating radar

作　　者：冯涛 王旋旋 李玉海 FENG Tao;WANG Xuanxuan;LI Yuhai(The Third Geological Team of Shandong Bureau of Geology and Mineral,Yantai,Shandong 264025,China;School of Hydraulic Engineering,Ludong University,Yantai,Shandong 264004,China)

机构地区：[1]山东省第三地质矿产勘查院,山东烟台264025 [2]鲁东大学水利工程学院,山东烟台264004

出　　处：《北京测绘》2025年第3期391-395,共5页Beijing Surveying and Mapping

基　　金：2024年度山东省档案科技项目计划(2024-29)。

摘　　要：在大型隧道施工过程中,针对隧道开挖遭遇不良地质体频繁诱发地质灾害和工程事故的问题,本文基于探地雷达法对隧道掌子面进行了超前地质预报研究。根据隧道破碎富水围岩与完整围岩之间的电性差异构建相应的地质病害体模型,基于时域有限差分法(FDTD)和完全匹配层(PML)的吸收边界条件进行探地雷达正演模拟分析,研究破碎富水围岩带在雷达剖面上的响应特征。将该方法应用于珠江三角洲东南部某隧道工程,结果表明探地雷达实测数据与正演结果响应特征一致,且与隧道实际施工开挖情况相吻合,证明该方法在指导实际隧道施工过程中是便捷、有效的。In the process of long tunnel construction,unfavorable geological bodies during tunnel excavation often induce geological disasters and engineering accidents.To solve this problem,this paper carried out advanced geological prediction research on the tunnel face based on the ground-penetrating radar(GPR)method.According to the electrical difference between the broken and water-rich surrounding rock and the complete surrounding rock in the tunnel,the corresponding geological disease body model was constructed.Based on the finite-difference time-domain(FDTD)method and the perfectly matched layer(PML)absorbing boundary conditions,the forward modeling analysis of GPR was carried out to study the response characteristics of the broken and water-rich surrounding rock zone on the radar profile.The method was applied to a tunnel project in the southeast of the Pearl River Delta.The results show that the response characteristics of GPRmeasured data and forward modeling results are consistent,and they align with the actual construction and excavation of the tunnel,which proves that the method is convenient and effective in guiding the actual tunnel construction process.

关 键 词：探地雷达 正演模拟 时域有限差分(FDTD) 破碎富水围岩带 

分 类 号：P208[天文地球—地图制图学与地理信息工程]