西成客运专线长大隧道涌水特征与物探资料的对比分析  

Comparative Analysis of Gushing Water Characteristics and Geophysical Data in Long Tunnels of Xi’an-Chengdu Passenger Dedicated Railway

作　　者：罗文艺[1,2] LUO Wenyi(Geological Subgrade Design Office,China Railway First Survey and Design Institute Group Co.Ltd.,Xi’an Shaanxi 710043,China;Shaanxi Railway and Underground Traffic Engineering Key Laboratory,Xi’an Shaanxi 710043,China)

机构地区：[1]中铁第一勘察设计院集团有限公司地质路基设计处 [2]陕西省铁道及地下交通工程重点实验室

出　　处：《铁道建筑》2019年第11期70-74,共5页Railway Engineering

摘　　要：基于西成客运专线长大隧道,采用了音频大地电磁法及高密度电法进行了综合勘探。根据物探电阻率值、电阻率梯度及异常形态,选取秦岭及大巴山区10座长大隧道,对其施工涌水水文地质特征与勘察物探资料进行了对比分析。研究结果表明,音频大地电磁法及高密度电法揭示的敞开贯通型、敞贯串珠型、串珠状、部分敞开尖灭型、界面型低阻异常类型与裂隙水发育及集中涌水具有较好的相关性。揭示的圈闭型、界面型及部分敞开尖灭型低阻异常类型与裂隙水不发育具有较好的相关性,与物探异常相关的典型涌水有40段,平均相关性达46.5%。研究成果有助于指导隧道水文地质勘察及提高隧道涌水量预测精度。Based on the long tunnel of Xi’an-Chengdu Passenger Dedicated Line,the audio magnetotelluric methodand high-density electrical method were used for comprehensive exploration. According to the resistivity value,resistivity gradient and abnormalmorphology,10 long tunnels in Qinling and Daba Mountains were selected to analyzethe hydrogeological characteristics of the gushing water and the prospective geophysical data. The audio magnetotelluricmethod and the high-density electrical method reveal that the open-through type,the open-through bead type,thebeaded type,the partially open-tip type and interfacial geophysical low-resistance anomaly zone have a good correlationwith the development of fissure water and concentrated gushing water. Geophysical exploration reveals that trappingtype,interfacial low-resistance anomaly type and the partially open-tip type have a good correlation with thenondevelopment of fissure water. The typical 40 sections of gushing waters related to geophysical prospecting arerevealed with an average correlation of 46.5%. The research results are helpful to guide the hydrogeological explorationof tunnels and improve the prediction accuracy of tunnel water inflow,which is meaningful for engineering application.

关 键 词：长大隧道 涌水特征 音频大地电磁法 高密度电法 异常形态 对比分析 特征库 

分 类 号：U453.61[建筑科学—桥梁与隧道工程]