岩溶区隧道超前地质预报探测系统与应用  

Advanced Geological Prediction Detection System for Tunnel in Karst Areas and Its Application

作　　者：王保军 WANG Baojun(China Railway 14^(th) Bureau Group Fifth Engineering Co.Ltd.,Jining Shandong 272004,China)

机构地区：[1]中铁十四局集团第五工程有限公司,山东济宁272004

出　　处：《铁道建筑技术》2023年第3期148-151,共4页Railway Construction Technology

基　　金：山东省经信委2019年度第二批技术创新项目计划(201921908017)。

摘　　要：突泥涌水是岩溶地区隧道掘进施工和运营期间最常见的地质灾害,对潜在突泥涌水区域进行超前地质预报至关重要。介绍了6种岩溶区预测方法,总结了其预测距离、适用条件及存在的优缺点。通过分析6种预测方法的特点,结合项目现场试验条件,从宏观到细观、由远及近,建立了岩溶区全面探测的前瞻性系统。利用瞬变电磁和地质雷达对永兴一号隧道DK278+402.7~DK278+482.7段开展超前地质预报,确定了岩溶区的位置和填充状态,利用超前钻孔对预测结果进行了复核,最后通过开挖结果验证了岩溶区预测的准确性。研究结果表明:将不同的预测方法结合起来,可以充分利用每种方法的优点,克服其不足,提高预测精度,有效避免地质灾害对工程的不利影响。Mud and water innush is the most common geologieal dsster during tunnel excavation and operation in karst areas,and it is very important to make advanced geologieal prediction for potential mud and water inrush areas.This paper introduced six prediction methods for karst areas,and summarized their prediction distance,applicable conditions,advantages and disadvantages.By analyzing the characteristics of six prediction methods and combining the field test conditions of the project,a prospective system for comprehensive exploration of karst was was established from macro to micro,from far to near.Using transient electromagnetic and geological radar,advanced geological prediction was carried out for DK278+402.7~DK278+482.7 section of Yongxing No.1 Tunnel,the location and flling state of karst area were determined,and the prediction rsults were rechecked using adwance boreholes.Finally,the accuracy of karst area prediction was verifed through excavation results.The research resuls show that the combination of different prediction methods can make full use of the advantages of each method,overome is shortcomings,improve the prediction accwracy,and ffetiveley avoid the adverse impact of geological disasters on the projeet.

关 键 词：突泥 涌水 超前探测 瞬变电磁 地质雷达 超前钻孔 

分 类 号：U456.3[建筑科学—桥梁与隧道工程]