A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Gin Drinker's Bay Landfill, Hong Kong, ceased operations in 1979. The site did not have a lining system and existing subsoil drains were largely ineffective in intercepting migrating leachate. When a 250 m stretch of railway needed to be built through a portion of the closed landfill site, numerous geosynthetic protections were needed. The waste needing to be crossed by the rail line presented numerous challenges. Any concrete foundations built into the waste would have been susceptible to constant aggressive attack. Measures to provide protection to the viaduct's concrete piles had to be considered when construction began. A capping system using geosynthetics was designed to cover the exposed waste. It was incorporated into the pile caps and extended into each pile. In doing so, the whole viaduct concrete structure was protected against leachate. Also, the capping design accommodated adequate drainage. Eight years after the installation was completed, the owner granted a request to revisit the site in March 2005. Vegetation is now established on all fill dope areas. Full grass and ground coverage is seen. The landscape looks mature, and soil has not eroded. The majority of the exposed seams appear strong and geomembrane is well protected by the geotextile against soil settlement down drag. The exposed geomembranes and geotextiles do not show signs of deterioration. There is no indication for geocomposite malfunction.
Gin Drinker's Bay Landfill, Hong Kong, ceased operations in 1979. The site did not have a lining system and existing subsoil drains were largely ineffective in intercepting migrating leachate. When a 250 m stretch of railway needed to be built through a portion of the closed landfill site, numerous geosynthetic protections were needed. The waste needing to be crossed by the rail line presented numerous challenges. Any concrete foundations built into the waste would have been susceptible to constant aggressive attack. Measures to provide protection to the viaduct's concrete piles had to be considered when construction began. A capping system using geosynthetics was designed to cover the exposed waste. It was incorporated into the pile caps and extended into each pile. In doing so, the whole viaduct concrete structure was protected against leachate. Also, the capping design accommodated adequate drainage. Eight years after the installation was completed, the owner granted a request to revisit the site in March 2005. Vegetation is now established on all fill dope areas. Full grass and ground coverage is seen. The landscape looks mature, and soil has not eroded. The majority of the exposed seams appear strong and geomembrane is well protected by the geotextile against soil settlement down drag. The exposed geomembranes and geotextiles do not show signs of deterioration. There is no indication for geocomposite malfunction.
The landfill caps of Gin Drinker's Bay
Bau einer Bahnlinie durch eine Mülldeponie
Ng, Gary (author)
2005
4 Seiten, 5 Bilder
Article (Journal)
English
CASE HISTORY: KWAI CHUNG PARK VIADUCT AT GIN DRINKER'S BAY LANDFILL, HONGKONG
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