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《Yellow River》 2015-01
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Study on GPR Forward Response Characteristics of Cement- Soil Cutoff Wall's Quality Defects

WEI Kuiye;SONG Xinjiang;Anhui and Huaihe River Water Resources Institute;  
Cement- soil cutoff wall has more and more widely application in the hydraulic engineering,as a concealed engineering,its quality detection often uses the GPR etc,to have a deeper understanding on the quality defects of the GPR response characteristics. By using ray tracing method,we got the GPR response under the conditions of local mud,disengaging with air and disengaging with water by profiling method and wide angle reflection and refraction( WARR) and got the frequency domain response by using FFT. By comparing the time domain and frequency domain response characteristics,the results show that: by profiling method,the GPR response characteristics of local mud in time domain is positive polarity reflected wave,the amplitude spectrum has one energy peak; disengaging with air in time domain is positive polarity and strong amplitude reflected wave,the amplitude spectrum has two energy peaks; disengaging with water in time domain is negative polarity and weak amplitude reflected wave,the amplitude spectrum has four energy peaks,it is similar to the non- target body,but they have the large difference between the two phase spectrums. By wide angle reflection and refraction( WARR),the three objects are mainly presented amplitude anomaly.
【Fund】: 水利部科技推广计划项目(TG1414)
【CateGory Index】: TV543.8
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