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김병일(Kim Byoungil),유완규(Yoo Wankyu),양미림(Yang Mirim),박용석(Park Yongseok) 대한토목학회 2012 대한토목학회논문집 C Vol.32 No.1
선반식 옹벽에서 선반은 옹벽에 작용하는 전체 수평토압의 크기를 줄여주며, 이로 인해 구조물의 전체적인 안정성이 향상된다. 이 연구에서는 아직 국내에서는 연구가 진행된 바 없는 선반식 옹벽에 작용하는 토압분포를 파악하고 캔틸레버식 옹벽에 작용하는 토압분포와 비교하기 위하여 모형시험을 실시하였다. 또한 흙 종류와 옹벽 배면의 굴착각도를 달리하여, 흙 종류와 되메움 조건이 캔틸레버식 옹벽과 선반식 옹벽에 작용하는 토압의 변화에 미치는 영향을 파악하였다. 모형시험결과 선반의 설치로 인하여 발생하는 선반식 옹벽의 토압감소는 캔틸레버식 옹벽과 비교할 경우에 뚜렷하게 발생하였고, 옹벽에 발생하는 수평변위도 선반식 옹벽이 캔틸레버식 옹벽에 비해서 작게 발생하는 것으로 나타났다. 또한 캔틸레버식 옹벽에 비해서 선반식 옹벽의 전도파괴에 대한 안정성이 상대적으로 높은 것으로 나타났다. The relieving platform has the advantage of decreasing the total lateral earth pressure on the retaining wall and increasing the overall stability of the structure. Several modeling tests were performed to determine the earth pressure distribution on the retaining wall with a relieving platform and to compare it with that of the cantilever retaining wall. Different types of soil and angle of cutting surface were used to determine the effect of the soil characteristics and the backfill conditions on these earth pressure distributions. From the modeling tests, comparisons between the retaining wall with a relieving platform and the cantilever retaining wall show that the reduction of the lateral earth pressure and deformation of wall was indicated clearly on the retaining wall with a relieving platform. And the overall stability was increased by the relieving platform.
김병일(Kim, Byoungil),김수연(Kim, Soo-Ryon),오상근(Oh, Sang-Keun) 한국콘크리트학회 2021 한국콘크리트학회 학술대회 논문집 Vol.33 No.2
본 연구는 가시광 및 UV에 반응하는 광촉매를 광투과콘크리트(LEFC)에 혼입하여 광촉매를 콘크리트 표면에 노출시킨 후 가시광 및 UV에 미세먼지 전구물질인 No의 광분해능력을 평가하여 결과를 도출하였다. In this study, a photocatalyst that reacts to visible light and UV was mixed into light emotion friedly concrete (LEFC) and the photocatalyst was exposed to the concrete surface, and then the photodegradation ability of No, a precursor of fine dust, was evaluated and the results were derived.
김병일 ( Kim Byoungil ),오상근 ( Oh Sang-keun ),송제영 ( Song Jae-young ) 한국건축시공학회 2023 한국건축시공학회 학술발표대회 논문집 Vol.23 No.1
Test results for a total of four types of complex waterproofing methods were analyzed. In the case of the A method, the stress generated by high-viscosity compounds adhering to the base test body during the behavior of the test body was transferred to the sheet surface layer. In the case of the B method and the C method, the properties of the waterproof sheet consisting of a non-hardened seal based and a non-hardened seal are well reflected and stress absorption in the non-hardened seal layer acts strongly, rapidly reducing stress transfer to the surface of the waterproof sheet. In the case of the D method, slip occurs due to repeated behavior, and the stress on the attachment surface is reduced, and the stress transfer to the surface is greatly reduced. As a result, four types of composite waterproofing methods resulted in changing the stress transfer mechanism caused by behavior on the concrete surface due to the physical properties of the internal constituent material of the waterproof sheet.
김병일 ( Kim Byoungil ) 한국건축시공학회 2023 한국건축시공학회 학술발표대회 논문집 Vol.23 No.2
Leakage in the structure due to the irregular flow of groundwater in the underground structure penetrates into internal spaces such as underground parking lots and basement through underground walls, which is expensive in terms of maintenance of the building. In this study, various composite waterproofing methods installed on the outer walls of underground structures were selected to evaluate the structural performance of composite specimens due to bending behavior through experiments and analysis on bending test behavior on concrete attachment surfaces.