CASE HISTORY: KWAI CHUNG PARK VIADUCT AT GIN DRINKER'S BAY LANDFILL, HONG KONG

摘要

One section, about 250 m of the Airport Railway Express linking the Chek Lap Kok International Airport and the city center runs through the Gin Drinker's Bay Landfill, which ceased operation in 1979. The site had no landfill lining system and existing subsoil drains were largely ineffective in intercepting migrating leachate. The gas content was considered a hazard so much so that the site, intended as Kwai Chung Park, was never opened to public. In addition, any concrete foundation built into the waste would have been susceptible to constant aggressive attack.Geosynthetics was introduced to mitigate environmental impact and to provide protection to viaduct concrete structures when excavation and construction began. This paper reviews the geosynthetics design, the material, the installation and the observable effectiveness eight years after completion.