为了确认探地雷达检测盾构隧道的效果，在不同工况下开展试验和验证，为探地雷达检测盾构隧道背后充填质量提供实践依据。研究表明，管片密集的钢筋结构对电磁波产生一定的屏蔽作用并引起管片内多次波震荡，检测时不同测线位置的结构差异更增加了检测难度。通过合理选用天线并优化采集过程，探地雷达可以检测到盾构隧道管片背部的界面异常，以单个管片为最小判定单位，定性判断管片背后注浆密实度是可行的，雷达图像异常强弱与缺陷大小的对应关系还应进一步检验确认。

Tests and verifications were conducted under various working conditions to confirm the effect of ground penetrating radar (GPR) in detecting shield tunnels. This provided a practical basis for GPR in detecting the backfilling quality of a shield tunnel. The research shows that the dense steel structure of the shield segment can shield the electromagnetic wave and cause multiple oscillations. The structural differences of different measuring line positions also increase the difficulty of detection. GPR can detect interface anomalies on the backs of shield tunnel segments by carefully selecting the antenna and optimizing the acquisition process. Choosing a single shield segment as the minimum determination unit to qualitatively determine the grouting density behind the segments is reasonable. The corresponding relationship between the intensity of the radar image anomalies and the size of the defects needs to be verified in the future.

P631.3+4

国家重点研发计划(2017YFB1201204)