2011 10 10 157 JOURNAL OF RAILWAY ENGINEERING SOCIETY Qct 2011 NO. 10 Ser. 157 1006-2106 2011 10-0072 - 06 430063 CMP P631. 325 A Experimental Study on Geophysical Prospecting Method for Subsidence of Box Culvert and Bridge of Shanghai - Hangzhou Railway CUI De - Hai China Railway Siyuan Survey and Design Group Co. Ltd. Wuhan Hubei 430063 China Abstract Research purposes The uneven subsidence appeared in the soft soil stratum around the newly - built railway box culvert and bridge of Shanghai - Hangzhou Railway and it brought about the earth cavity because of collapse. The geophysical prospecting was conducted for several times but the results were not good. Based on the full analysis of the structure and the formation cause of the soft stratum around the box culvert and bridge in this area the experimental study was done on the detection of the subsidence with the methods of ground penetrating radar and the transient rayleigh wave prospecting. Research conclusions From the analysis of the results of the several box culverts and bridges it is concluded that application of the multiple - coverage and multiple - channel transient rayleigh wave prospecting along with the CMP analytic method to detect the subsidence can effectively reduce the influence of the interference wave and enhance the noise - signal ratio getting good effect of detecting subsidence of the box culvert and bridge. Key words railway box culvert and bridge soft soil stratum ground penetrating radar transient multiple - channel rayleigh wave 1909 0. 7 km 2005 1 m 2011-05 - 13 1977
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10 77 Exploration Technology for Karst under Tunnel on Yichang - Wanzhou Railway J. Journal of Railway Engineering Society 2009 2 76-81. 2 Zhang Bixing Lu laiyu. Guided Waves in Stratified Half Space J. Acoustical Physics 2003 4 420-430. 2 3. - J. 2005 4 246-254. Zhang Bixing Lu laiyu. Investigation on the Dispersion Curves of Rayleigh Wave by Frequency - wavenumber Analysis Method J. Chinese Journal of Engineering Geophysics 2005 4 246-254. 4 Park C B Miller R D Xia J. Multichannel Analysis of Surface Waves J. Geophysics 1999 3 800-808. 5 Addo K O Robertson P K. Shear - wave Velocity 3 Measurement of Soils Using Rayleigh Waves J. Cznadian Geotechnical Journal 1992 29 558-568. 6 D. P. Jansen & D. A. Hutchins Immersion Tomography Using Rayleigh and Lamb Waves J. Ultrasonics 1992 4 245-253. 7 J. Dorman & D. prentiss. Study of Shear Velocity Distribution by Mantle Rayleigh Waves J. Bull. Seism. 1. Bull. Seism. Soc. Am. 1974 64 1685-1696. J. 2009 2 76-81. Cui Dehai Yang Qingbo. Applicable Study of Geophysical Soc. Am. 1960 50 87-115. 8 B. L. N. Kennett. Reflection Rays and Reverberations J. 檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨檨 13 GPS Journal of Railway Engineering Society 2006 Z1 9-14. 3. J. 2009 1 36-39. Gao Shan Feng Guangsheng. Application Research on 3D Remote Sensing Technique for Railway Engineering Geology Investigation J. Railway Investigation and 3S Surveying 2009 1 36-39. 4. J. 2004 1 450-454. Zhuo Baoxi. Present Situation and Prospect of Application 1. 5 TB 10041 2003 S. J. 2005 1 399-406. Zhuo Baoxi Zhen Chunxiang. Application of Remote Sensing Technology in the Railway Engineering Geology J. Journal of Railway Engineering Society 2005 Z1 399-406. 2. J. 2006 1 9-14. Zhuo Baoxi. The Role of Aerial Surveying and Remote Sensing Technology in Railway Survey and Design J. for Engineering Geology of Remote Sensing J. Journal of Engineering Geology 2004 Z1 450-454. TB 10041 2003 Code for Technique on Remote Sensing of Railway Engineering Geology S. 6. M. 2003. Zhuo Baoxi. The Interpretation and Application on Remote Sensing of Engineering Geology M. Beijing China Railway Publishing Company 2003.