음향센서를 이용한 콘크리트 슬래브 하부지반 공동 탐지 적용성 분석

초록

Cavities have been found many times recently in downtown of metropolitan area due to old and damaged utility pipes installed in the ground long time ago. The cavities are generated by spilling out of flowing water from the pipes mostly. The cavities generated below subway track can induce irregularities and instabilities to the rack. In this study, the applicability of the cavity detection of urban railway concrete slab under soil using microphone sensor was analyzed. For this purpose, a finite element analysis program ABAQUS was used to simulate the cavity and analyzed the response spectrum according to the impact load. From these results, it is confirmed that it is possible to detect the cavity generation region under the concrete track using the microphone sensor.