综合物探方法在贵南高铁隧道基底隐伏岩溶探测中的应用  

Application of Comprehensive Geophysical Prospecting Method in Basement Hidden Karst Detection of Guinan’s High-speed Railway Tunnel

作　　者：宁刚[1] Ning Gang(China Railway First Survey and Design Institute Group Co.,Ltd.Gansu Railway Comprehensive Engineering Survey Institute Co.,Ltd,Lanzhou Gansu 730000,China)

机构地区：[1]中铁第一勘察设计院集团有限公司甘肃铁道综合工程勘察院有限公司,甘肃兰州730000

出　　处：《工程地球物理学报》2024年第2期196-204,共9页Chinese Journal of Engineering Geophysics

基　　金：陕西省自然科学基础研究计划项目(编号:2022JM-139)。

摘　　要：高铁隧道路线经过岩溶地区,勘察阶段由于地形和物探方法局限性的影响,不能完全勘察清楚岩溶发育情况。本文结合高密度地震映像、地质雷达、二维瞬态面波和钻探方法,详细研究了隧道施工阶段岩溶探查中各种方法的外业数据采集、处理方法、数据分析的注意事项。经过研究,将地震映像的主频提高到800 Hz,可分辨深度5~25 m、宽度10 m左右的空溶洞和充填溶洞;地质雷达有效能量提高到600 ns,可分辨深度30 m内岩溶通道。结合贵南高铁隧道基底岩溶探查中的各种典型图像特征,以及地质施工人员的要求,探讨了隧道基底岩溶探测资料物探地质解释的四类划分解释原则,满足了地质人员及设计施工对物探资料可读性的要求,为岩溶探测资料解释提供了参考。When the high-speed rail tunnel passes through the karst area,due to the influence of topography and limitation of geophysical exploration methods,the karst development is not fully investigated during the investigation stage.This paper combines high-density seismic image,geological radar,two-dimensional transient surface wave and drilling methods to study the data acquisition,processing methods and data analysis of various methods in karst exploration during the tunnel construction stage in detail.After research,the main frequency of seismic image is increased to 800 Hz,which can distinguish empty karst caves and filled karst caves with depth of 5~25 meters and width of about 10 meters;the effective energy of geo-radar is increased to 600ns,which can distinguish karst channels with depth of 30 meters.Combined with various typical image characteristics in karst exploration at the bottom of Guinan high-speed railway tunnel and the requirements of the geologists and constructors,the four categories of interpretation principles for the geophysical geological interpretation of karst exploration data at the tunnel bottom are discussed,which meets the requirements of geologists and design and construction for the readability of geophysical exploration data,and provides reference for the interpretation of karst exploration data.

关 键 词：岩溶探测 隧道基底 地震映像 地质雷达 瞬态面波 

分 类 号：P631.4[天文地球—地质矿产勘探]