Abstract：Research purposes：For the geological prospecting for Xiangcan Submarine Tunnel in Xiamen ( the first submarine tunnel in mainland of china), the research is done on how to effectively solve the engineering geological problems with geophysical prospecting method, such as how to collect, process and interpret the data when using the seismic reflection prospecting for submarine tunnel, for the purpose of reducing the expense of prospecting and shortening the prospecting period.
Research conclusions：The data collection must be conducted during sea slack tide. The non-regulation observation system of reflection seismic exploration must be transferred to regulation observation system, and quality of data processing can be improved by density of the velocity analysis points. In the data interpretation, the characteristics corresponding to the different geological conditions in the time reflection profiles are summed up. Namely, the reflection line-ups of nicer continuity, higher frequency and lower amplitude correspond to the seabed with thicker silt, the indication of three continuous reflection line-ups correspond to the stratum covered by soil, indication of two continuous reflection line-ups correspond to the stratum with no cover of soil, and when the reflection line-ups occurs twist or disconnection, it corresponds to the cranny or the rock-vein.
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2010, Vol. 27 
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