高速铁路隧道勘察钻探与物探综合应用分析

为研究鄂西山区某高速铁路隧址区工程地质问题,在勘察过程中采用综合勘探手段,利用钻探、音频大地电磁法、高密度电法,对隧址区地层情况、水文地质和工程地质条件、及其构造断层、岩溶、岩体富水破碎带的空间展布形式进行勘察.并将钻探实际揭露的目标地质体地层情况与物探解译成果进行对比分析.研究表明,物探对地层的岩性以及岩体破碎带的解...

Application of Drilling and Geophysical Exploration in High-speed Railway Tunnel Survey

In order to study the engineering geological problems of a high-speed railway tunnel site in the western mountain area of Hubei province,comprehensive exploration methods,including drilling,audio frequency magnetotelluric method and high-density electrical method,were used during the investigation process.These methods were adopted to investigate the strata,hydrogeological and engineering geological conditions of the tunnel site,as well as the spatial distribution of structural faults,karst and water rich fracture zone of rock mass.In addition,the stratigraphic conditions of the target geological body revealed by drilling were compared with the geophysical interpretation results.The study shows that geophysical exploration has a high interpretation accuracy for lithology and rock mass fracture zone,and the two geophysical methods can qualitatively identify the geological bodies with obvious differences in physical characteristics such as structural fault,rock mass fracture zone and karst.The research results show that the abnormal geological bodies detected by different geophysical exploration methods could be different,and the accuracy of geophysical exploration results can be improved by the interpretation and analysis of a variety of geophysical exploration results;through the mutual verification of drilling and two different geophysical exploration,the karst development,water abundance and fault fracture zone distribution in the calcareous cemented conglomerate area of the tunnel site can be better investigated.