综合超前地质预报技术在岭脚隧道的应用研究  

Application of the Comprehensive Geological Prediction Techniques in the Lingjiao Tunnel

作　　者：周东[1,2] 刘宗辉[1,2] 吴恒[1,2] 罗根传 黄世武 

机构地区：[1]广西大学土木建筑工程学院,南宁530004 [2]广西大学工程防灾与结构安全教育部重点实验室,南宁530004 [3]广西交通投资集团有限公司,南宁530001 [4]广西信达高速公路有限公司,南宁530021

出　　处：《现代隧道技术》2015年第5期171-177,共7页Modern Tunnelling Technology

基　　金：国家自然科学基金项目(51178124);广西科技计划重点项目(桂科攻10124006-10)

摘　　要：受两条区域断层交汇以及岩浆侵入形成较厚隔水岩墙的影响,岭脚隧道左线掌子面FK18+330前方可能赋存多种不良地质体。文章针对这种极为复杂的地质条件,在地质分析的基础上进行了隧道宏观地质预报,洞内采用陆地声纳法+瞬变电磁法+地质雷达法、洞外采用陆地声纳法+微分电测法+瞬变电磁法进行了现场探测,并进行了综合分析和预报。现场开挖结果表明,上述综合预报方法可有效减小现场物探在隧道轴向和横向上的误差,能更好地确定复杂地质条件下隧道前方不良地质体的位置、大小和类型。Affected by the intersection of two regional faults and a water-resistant rock wall induced by magmat- ic intrusion, various unfavorable geological bodies may exist in front of the working face at FK18＋330 on the left line of the Lingjiao tunnel. In light of these complicated geological conditions, a macroscopic tunnel geological prediction was first conducted on the basis of geological analysis, and then an in-situ geological detection was conducted inside and outside of the tunnel by the following methods respectively： land sonar＋transient electro- magnetic＋geological radar and land sonar＋differential electrical sounding＋transient electromagnetic. Additionally, a comprehensive analysis and prediction was carried out, with the in-situ excavation results showing that the above comprehensive prediction method can effectively reduce the error of in-situ geophysical prospecting in the tunnel＇s axial and transverse directions as well as precisely determine the location, size and type of the unfavor- able geological bodies in front of the tunnel face under complicated geological conditions.

关 键 词：隧道 断层交汇 综合地质预报 综合物探方法 

分 类 号：U452.1[建筑科学—桥梁与隧道工程]