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Title |
Development of a GPR-Based Signal Processing Technique for Assessing the Construction Quality of Multilayer Floating Floor Systems in Apartments
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Authors |
서동희(Donghui Seo) ; 이태민(Taemin Lee) ; 우욱용(Ukyong Woo) ; 목지욱(Ji-wook Mauk) ; 최하진(Hajin Choi) |
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DOI |
https://doi.org/10.4334/JKCI.2026.38.3.275 |
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Keywords |
지표투과탐사레이더(GPR); 뜬바닥; 시간 영점 조절; 다층 구조; 비파괴 평가(NDE) ground penetrating radar (GPR); floating floor; time-zero; multilayer; nondestructive evaluation (NDE) |
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Abstract |
This study presents a non-destructive evaluation technique utilizing ground penetrating radar (GPR) to identify interlayer boundaries and quantitatively assess the thicknesses of floor system components. The proposed method employs time-series electromagnetic signals acquired through GPR antennas, incorporating time-zero correction and hyperbola removal to enhance measurement accuracy. Validation was performed using mock-up specimens, with GPR-derived depths compared against those obtained via core drilling. The estimated thicknesses of the finishing mortar and autoclaved lightweight concrete (ALC) layers achieved accuracies of 95.8 % and 99.9 %, respectively. A multilayer depth extraction method, which independently applies the relative permittivity of each layer, yielded deviations of only ?0.10 mm and 0.26 mm from the core drilling results. Field implementation in apartment buildings confirmed the applicability of the method, with average measured thicknesses of 45.08 mm and 43.85 mm for the finishing mortar and ALC layers, respectively. These findings demonstrate the effectiveness of the proposed GPR-based multilayer evaluation technique for verifying construction quality and assessing the performance of floor impact sound insulation systems.
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