Radar Signal Processing And Feature Information Recognising Of Tunnel Geological Prediction

In recent years, the tunnels and underground engineering have been constructed in our country, which not only accelerate the development of the society, but also improve the lives’ level of the people. In practice, the construction of tunnels and underground engineering become more and more difficult because of the complication of geological and environmental conditions. To ensure the construction safety, the tunnel geological prediction has been irreplaceable technique for the tunnel engineering. In recent years,ground penetrating radar technology with its high efficiency and good results, not only has more applications, but also work in a wide range applications of hidden objects. But the applications in the tunnel also have many deficiencies, the electromagnetic susceptible interference, signal instability, lack of standardized interpretation techniques, forecasting can`t be quantified, and so on.This paper based on ShiZiLong Tunnel in ChangXiang highway. For the requirements of soft rock tunnel engineering and interpretation deficiencies of radar data processing, the main content of the work are summarized as follows:(1) Summarized ground penetrating radar applied in tunnel geological prediction of electromagnetic wave propagation characteristics and laws in different environments, theoretically demonstrated ground penetrating radar applied in tunnel geological prediction of the feasibility and superiority.(2) Combined with practical engineering and theory, design a set parameters for ShiZiLong tunnel adverse geological exploration, and applied in practice, detecting the rich water place and jointed place under different conditions. Combined with ChangXiang highway and other similar project experience, using Radan5.0 data processing software on the ShiZiLong tunnel rich water place and jointed place with detection data processing.(3) For the tunnel construction process commonly encountered in varying degrees of rich water place and jointed place and other special geological conditions, summarized feature information in radar waveform stacked. Using spectrum analysis and complex signal analysis techniques quantitative analysis frequency, amplitude and phase, quantitative studies on the main frequency and frequency bandwidth to further improve the accuracy of the special geological conditions ahead of forecasts.