IN-HOLE SEISMIC METHOD FOR MEASURING DYNAMIC STIFFNESS OF SUBSURFACE MATERIALS

摘要

An in-hole seismic wave test method for measuring the stiffness of the ground is provided to let a filed technician make an in-hole seismic wave test easily by installing an oscillator and a sensor in one borehole. The in-hole seismic wave test method for measuring the stiffness of the ground comprises the steps of: forming one borehole(60) on the ground; connecting an oscillator(10) and a sensor(20) connected with a controller(50) and a dynamic signal analyzer(52) electrically using a connection member(40) and inserting to a measurement spot of the borehole in order; adhering the oscillator and the sensor inserted to the measurement spot of the borehole to a cavity wall of the borehole using an adhesion member(30) operated by the controller; operating a working member and a trigger arm(14) installed to the inside of the oscillator using electric signals of the controller, hitting the cavity wall of the borehole using an impact pestle(16) operated by the trigger arm and setting up a vibration; sensing a generation spot of the vibration using a sensor installed to the oscillator and sensing a destination spot of the vibration spread vertically along a stratum using the sensor; and storing the vibration signals sensed from the oscillator and the sensor in the dynamic signal analyzer and measuring.