PURPOSES : This study analyzes the service life of the repair methods of jointed plain concrete pavement (JPCP) on expressways in Korea using PMS data. METHODS : The Korea Expressway Corporation PMS data acquired from five major expressways in Korea were used for the analysis. The service lives of the repair methods were considered for two different cases: 1) the previous repair methods had been completely rerepaired by another or the same method due to their damage, and 2) the current repair methods were still in use. RESULTS : The service lives of D/G and section repair were shown to be at least 30 % and 50 % shorter than expected, respectively. Joint sealing and crack sealing exhibited a service life similar to that expected. The Mill-and-Asphalt-overlay method showed an approximately 30 % longer service life; this might be because some damage to the asphalt overlay is typically neglected until subsequent maintenance and repair. When multiple repairs were applied in series for an identical pavement section, the service life of repairs on previously damaged secti ons become even shorter compared to their first application. CONCLUSIONS : It was found that the analyzed service life of most important repair methods did not reach the expected service life, and that the service life of the same repair method becomes shorter as applied to the previously repaired concrete pavement sections. These shorter service lives should be seriously considered in future JPCP repair strategy development.

JCP(Jointed plain cement Concrete Pavement) is severe affected by environmental load such as temperature, relative humidity. Concrete slab repeatedly shrink and expand due to environmental loading is referred to curling and warping. As a result, restraint stress increases and joint can be damaged. Under the tunnel condition, temperature and relative humidity variations are smaller as compared with outside of the tunnel. Therefore it`s expected that JCP under the tunnel condition is less affected by environmental load than JCP outside of the tunnel. Also Joint opening behavior could be differ JCP of each condition. In this study, air temperature and relative humidity varying distance from entrance of tunnel, temperature by slab depth, and displacement of joint are measured at outside and inside of three tunnels on the expressway, using I-button and VW crackmeter sensor. As expected, difference of joint opening behavior could be evaluated. According to measuring result, design of pavement section and joint spacing of JCP could be determined under the tunnel condition.

최근에는 건설 시장에서는 숙련노동자의 부족, 작업환경 개선, 시공 안정성 확보 그리고 구조물의 내진성능 확보 등을 위하여 PC 구조물의 선호도가 증가하고 있지만 PC 제품을 벽체 구조에 적용하기 위해서는 유효두께의 확대 기술, PC 패널의 강결 접합 기술 그리고 시공방법의 개발이 요구되고 있으므로 본 연구에서는.JPC 더블월 공법을 개발하여 PC 벽체의 단면 효율성을 개선하였으며, PC 부재로 단일 구조물을 형성하여 일체 구조물로 거동할 수 있도록 시공하기 위한 JPC 공법을 제시하였다.