DEVICE FOR MEASURING ELASTIC WAVE FOR CORE HOLE OF TUNNEL CONCRETE LINING AND ELASTIC WAVE MEASURING METHOD USING CORE HOLE

摘要

PURPOSE: A device for measuring elastic wave for a core hole of a tunnel concrete lining and an elastic wave measuring method using the core hole are provided to use for valuating wholesomeness of tunnel wall body at the time of accurate safety diagnosis of the tunnel. CONSTITUTION: A device for measuring elastic wave for a core hole of a tunnel concrete lining includes a housing(10) having an upper plate(11), a side wall(12) and a lower plate(13), an oscillator(20) applying physical shock to measured object and generating elastic wave to the measured object, a first seismic sensor(30a) receiving elastic wave of the measured object, transmitting to a first acceleration meter(32) for sensing elastic wave of the measured object, a second seismic sensor(30b) receiving elastic wave of the measured object, transmitting to a second acceleration meter(34) for sensing elastic wave of the measured object, and an air bag(40) swollen by air injected into the inside and contacting and fixing first and second sensing rods(31,33) of the first and second seismic sensors to the surface of the inside of the hole of the measured object. The first and second acceleration meters are electrically connected with a data acquisition system and sends sensed elastic wave to the data acquisition system.