Research on the Detection of the Goaf on the Bottom of Raft Foundation Based on GPR
The bottom surface of the raft foundation is often out of the normal use of the building,and the ground penetrating radar technology can be used to find and repair in time.By establishing model experiments related to the design of the model of different media out of the air,the RIS-K2 software is used to extract the single channel waveform to interpret the information of the out of the air area according to the actual results of the ground penetrating radar,to obtain the depth of the out of the air and analyze the differences of the different media out of the air.Secondly,the numerical simulation of the ground penetrating radar electromagnetic wave based on FDTD and the research of MATLAB imaging technology are carried out for the forward simulation of various situations of the model test.The method of extracting the single-channel wave is also used to analyze the out of the air area,and the comparative analysis is carried out with the model test to verify the feasibility of the method.It is concluded that the method of extracting and interpreting the radar single channel waveform can quantitatively analyze the situation of the out of the air area,which has great practical value.
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