APPLICATION OF JOINT EXPLORATION METHOD OF SHALLOW SEISMIC REFRACTION AND REFLECTION WAVES ON WATER

Prospecting test of hidden fault and vertical lithological analysis was carried out by using joint exploration method of shallow seismic refract and reflect waves at Yihe river bridge seat along Beijing-Shanghai expressway. The prospecting test was conducted on water, which is about 400 meter wide. Quaternary sediment and subterrane within working area are sensitive to longitudinal wave velocity, which is the detected physical parameter. Authors use high resolution digtal seismograph ES-2401 and adopt the working method of "five small and two high, and pickup information of refracted and reflected waves all directionly. These enhenced the reliability of geological interpretation, and prospecting test achieved good results.