地质雷达在隧道整体道床检测中的应用及可靠性分析

以某长大铁路隧道工程为依托，在地质雷达无损检测铁路隧道整体道床的基础上，结合钻探资料、设计资料进行数学模拟分析，研究了地质雷达在隧道检测中的可靠性。结果表明:长大隧道整体道床缺陷，主要集中于填充层和整体道床与填充层分层界面处；数学模拟分析配对t检验p-value值均大于0.05，说明采用地质雷达无损检测可确定整体道床病害的具体位置及缺陷类型；单样本t检验得到总体上整体道床与仰拱厚度满足设计要求，填充层比设计厚度小0.20 m左右。

Application and Reliability Analysis of GPR in the Whole Bed Detection of Railway Tunnel

Based on the detection of the whole rail bed of the railway tunnel with GPR, combined with the drilling data and design data, a mathematical simulation analysis is conducted based on the engineering of a long-distance railway tunnel. The reliability of the GPR in tunnel inspection is studied. The results show that the monolithic roadbed defects of tunnels are mainly concentrated in the packing layer and the interface between the whole bed and the packed bed. The p-value in paired t test, which is greater than 0.05 by the mathematical simulation analysis, shows that the specific location of the disease and the type of defect can be determined by GPR; one sample t test shows that the thickness of the monolithic roadbed and the inverted arch meet the design requirements and the thickness of packing layer is 0.20 m less than the designed one.