摘要
为了提高岩溶地区隧道的超前地质预报的准确性,有效探测不良地质的位置、性质和规模,通过采用钻孔雷达和高精度孔内成像相结合的方法,以贵广高速铁路胡家寨和油竹山隧道为工程依托,对钻孔地质雷达和高精度孔内成像的基本原理、探测方法、观测系统、数据处理与成果解释进行了深入研究。结果表明:钻孔内雷达可以有效探测掌子面前方的富水构造和不连续体,判断含水、破碎带情况,并且可以减少超前钻孔的数量;高精度孔内成像可以直接观测到钻孔中地质体的各种特征及细微构造,编录地质柱状图。弥补了超前钻孔难以在钻孔取芯困难部位获取地质信息的不足,尤其适用于岩溶地区地质预报。
In order to improve the accuracy of advanced geological forecast of tunnel in karst area and to effectively detect the location, nature and scale of unfavorable geology, an in depth study concerning the basic principle, detection method, observation system, data processing and result interpretation of borehole radar and high-precision aperture imaging was conducted by combining both ways. It was based on the projects of Hujiazhai and Youzhushan tunnels of Guiguang high speed railway. The results show that borehole radar can effectively detect the water-rich and discontinuous structures in front of the heading, determinate the water content and broken belt, and can reduce the number of advance boreholes; besides, high-precision aperture imaging can directly observe the geological features and fine structure of boreholes, and log geological histogram. The study makes up for the shortage of acquiring geological information in the difficult position of the drilling core, and is especially suitable for geological forecast in karst area.
出处
《筑路机械与施工机械化》
北大核心
2017年第12期121-126,共6页
Road Machinery & Construction Mechanization
基金
中央高校基本科研业务费专项资金项目(SWJTU11ZT33)
教育部创新团队发展计划项目(IRT0955)
关键词
隧道工程
地质预报
钻孔雷达
孔内成像
tunnel engineering
geological forecast
borehole radar
aperture imaging
