TITLE:
Evaluation of Maintenance Strategies Based on Leakage Risk Assessment on Side Impervious Walls at Coastal Landfill Sites
AUTHORS:
Shinya Inazumi, Misato Sekitani, Kwang-Seok Chae, Ken-Ichi Shishido
KEYWORDS:
Coastal Landfill Site, Impervious Wall, Maintenance Strategy, Risk Assessment
JOURNAL NAME:
Materials Sciences and Applications,
Vol.8 No.6,
June
12,
2017
ABSTRACT: Asset management is a strategic decision-making aspect of social infra-structure that ensures safety by predicting long-term conditions and maximizing effectiveness under budgetary constraints. Predicting the deterioration of impervious walls is essential in the asset management of coastal landfill sites, particularly in the design of their maintenance and repair strategy. In this paper, a quantitative evaluation of the leakage of toxic substances in coastal landfill sites where deterioration of side impervious walls has decreased the water interception performance is reported. In addition, risk evaluation based on the asset management of the leakage is applied to determine an appropriate repair method. The strategy of repairing the walls when the concentration of the toxic substances leaking into the sea area exceeds the closure and abandonment of coastal landfill sites is demonstrated to be superior. Moreover, the strategy of repairing only the seaside side impervious wall is shown to be cost-effective.