Device and Method to Measure Stress Waves inside a Core Hole of Tunnel Lining

摘要

The present invention has been to use an acoustic wave identify the physical properties of the tunnel concrete lining, it is an object of the present invention fall within the core hole formed in a tunnel concrete lining reliability the shear wave velocity of the periphery of the core hole, and the concrete can be measured efficiently by providing a method of providing a core-hole elastic wave measuring apparatus of the lining, and measuring the shear wave (S- wave) in inner section deep in the core hole than the surface under field conditions of the concrete lining by using the equipment and precision of the tunnel and in ever used as the evaluation data is also sound at the time of diagnosis safety tunnel wall, in order to achieve this object key will be provided with the oscillator, the first and second air bags and gamjingi, measured for an acoustic wave to miniaturization to fit into the core hole tunnel concrete lining to configure the device, and an acoustic wave measuring device in the core hole of the concrete tunnel lining By putting up after the core-hole wall face and grounding the first and second detecting rods of the first and second gamjingi, hayeoseo by generating an acoustic wave in the acoustic wave detected by the first and second oscillator gamjingi delivered to the data acquisition system, the acoustic wave velocity the concrete lining a tunnel core hole elastic wave measurement method by which Ke calculated by the basic feature of the technology configuration.