• Title/Summary/Keyword: trapped water drainage system

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A Development of the Trapped Water Drainage System to Prevent the Deterioration of Deck Slab and Pavement (교면포장 및 바닥판 손상방지를 위한 내부침투수 처리시스템 개발)

  • Lee, Sang-Dal;Lee, Sang-Soon;Shin, Jae-In;Seo, Sang-Gul
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.6 no.1
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    • pp.233-239
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    • 2002
  • Reinforced concrete deck slabs are directly affected by traffic loads and they are also susceptible to weather-related problems, such as cracking, reinforcement corrosion, spatting, scaling, delamination, leakage, efflorescence and so on. Some of these defects are caused by water which seeps through pavements and trapped between pavements and deck slabs. For durability of reinforced concrete deck slabs and pavements, it is very important to protect deck slabs and drain the trapped water out. To develop the trapped water drainage system, the following studies have been performed in Korea Highway Cooperation: related researches a re reviewed; for six bridges, deck slabs are thoroughly investigated; new system to effectively drain the trapped water out is proposed; the proposed system is installed and evaluated. The proposed system is proved to be effective to drain the trapped water out and is expected to increase the durability of reinforced concrete deck slabs.

A Development of the Trapped Water Drainage System to Prevent the Deterioration of Deck Slab and Pavement. (교면 포장 및 바닥판 손상 방지를 위한 내부 침투수 처리시스템 개발)

  • 조서연;한범성;이상달;이성수;이상순;이일용
    • Proceedings of the Korea Concrete Institute Conference
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    • 2001.11a
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    • pp.1175-1180
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    • 2001
  • Reinforced concrete deck slabs are directly affected by traffic loads and they are also susceptible to weather-related problems, such as cracking, reinforcement corrosion, spatting, scaling, delamination, leakage, efflorescence and so on. Some of these defects are caused by water which seeps through pavements and trapped between pavements and deck slabs. For durability of reinforced concrete deck slabs and pavements, it is very important to protect deck slabs and drain the trapped water out. To develop the trapped water drainage system, the following studies have been performed in Korea Highway Cooperation: related researches are reviewed; for six bridges, deck slabs are thoroughly investigated; new system to effectively drain the trapped water out is proposed; the proposed system is installed and evaluated. The proposed system is proved to be effective to drain the trapped water out and is expected to increase the durability of reinforced concrete deck slabs.

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An experimental study on the influence of undular bore on the hydraulic stability at Shinwol rainwater storage and drainage system (불규칙 단파가 신월저류배수시설의 수리적 안정성에 미치는 영향에 대한 실험 연구)

  • Oh, Jun Oh
    • Journal of Korea Water Resources Association
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    • v.52 no.5
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    • pp.313-323
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    • 2019
  • Deep Tunnel system is a large-scale urban flood control facility installed underground in order to reinforce the lack of drainage systems in developed cities. In a structure like a deep tunnel system, the undular bore generated in the downstream causes a problem in the hydraulic stability of the tunnel. In this study, to investigate the influence of the undular bore on the hydraulic stability at the "Shinwol rainwater storage and drainage system", under construction for the first time in the country, a hydraulic model experiment was conducted on various flooding inflow scenarios. As a result of the hydraulic model experiment carried out in this study, the undular bore generated downstream is trapped in the pipe while moving to upstream, pushes the compressed air. It is judged that overflow occurred by choking the vertical drop shaft in the process when this compressed air is being exhaust through the upstream vertical drop shaft and blocking flood inflow. In addition, the analysis of velocity of undular bore shows that the undular bore transfers energy, and at this time, the pressure rose in the pipe and the velocity increment occurred of the undular bore. Further studies are needed to predict the size and velocity of undular bore, which plays an important role in the hydraulic stability of the tunnel in the deep tunnel system.