地质雷达在某隧道超前地质预报中的应用

Application of Geological Radar in Advance Geological Forecast of a Tunnel

在公路隧道施工中,及时进行超前地质预报是非常重要的。该文以某实际隧道施工为背景,采用频率为70MHz和300MHz双通道屏蔽天线,同时对掌子面前方地质情况进行探测,得到两种频率下的雷达波形图,通过对比分析可以合理确定掌子面前方一定范围内的地质情况。这种探测方法较单一频率雷达探测精度高、效果好。通过与隧道开挖实际情况对比分析,表明超前地质预报与实际地质情况吻合度较好。

In the construction of highway tunnels, timely advance geological prediction is very important. Based on an actual tunnel construction, this paper uses the 70 MHz and 300 MHz dual-channel shielded antennas to detect the geology condition in front of the palm at the same time, and the radar waveforms under two frequencies are obtained. Through comparison and analysis, the geological conditions in a certain range in front of the palm can be reasonably determined. This detection method has higher detection accuracy and better effect than single frequency. By comparing with the actual situation of tunnel excavation, it shows that the advanced geological prediction is in good agreement with the actual geological situation.