Analysis of Troubles and Countermeasures in Landfill Sites

概要

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To construct landfill sites acceptable to regional residents, safe and reliable engineering structures are required. However, due to the fact that landfill sites require mixed techniques in the variable fields of civil engineering, the technical level of design and construction for landfill sites are not as yet mature, leading to technical troubles for many landfill sites.<BR>It is necessary to investigate the content of these troubles and to development countermeasures for preventing them in the future. This study analyzes real causes and effective countermeasures for problems in forty-eight cases of existent landfill sites, which authors have been involved in. Seven alternatives for trouble prevention are proposed, and evaluated by a questionnaire survey for specialists in design and construction of landfill sites. Results of this analysis reveal that many troubles arise in the process of construction and/or operation, but the causes of these points actually lie in the design stage. To prevent technical troubles, it is important that there are not only landfill site designs which are suitable to the geographical and geological features at properly selected sites but also thorough construction management and flexible countermeasures for unexpected accidents.