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该文章介绍了地质雷达的工作原理及其探测方法,采用“让德12-E”便携式多功能地质雷达进行探测,同时结合掌子面的地质描述对广贺高速公路隧道的大桂山段进行超前预报及衬砌的监测检测。根据现场施工条件及其探测精度和深度的要求,超前预报方面:侧线布置采用“一”字型测线,测量方法采用点测方式,测点间距为0.5m,天线中心频率主要采用100MHz;衬砌检测方面:采用线测方式,天线中心频率采用900MHz。采用盖方法对断层、含水裂隙、软弱夹层、初衬质量和钢拱架数量进行了全面的监测检测,其监测检测结果基本符合实际状况,保证了施工的安全,加快了工程进度,同时为地质雷达在公路隧道监测检测方面的应用积累了一些宝贵的经验。
This article introduces the working principle of GPR and its detecting method, and uses “Jean-de-12-E” portable multi-functional geological radar to detect. At the same time, Advance forecast and lining monitoring and testing. According to the site construction conditions and the requirements of its detection accuracy and depth, in the aspect of advanced prediction, the sideline layout adopts the “1” character line measurement method, and the measurement method adopts the point measurement method, the measurement point spacing is 0.5m, and the antenna center frequency mainly adopts 100MHz Lining detection: the use of line measurement, antenna center frequency using 900MHz. Cover method is adopted to comprehensively inspect and detect the faults, water-bearing fractures, weak sandwiches, initial lining quality and the number of steel arch frames. The monitoring and test results are basically in line with the actual conditions, which ensure the safety of construction and speed up the progress of the project. Meanwhile, Radar has accumulated some valuable experience in the application of road tunnel monitoring and detection.