Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
In-Situ Containment For Waste Landfill and Contaminated Sites
Abstract Management of waste landfill and contaminated sites has been a great concern in the discipline of geotechnical and geoenvironmental engineering. First, the current Japanese status of remediation of contaminated sites and waste containments are summarized in this paper, particularly focusing on the importance of development of in-situ remediation and containment technologies. Second, a construction technique for the vertical cut-off wall consisting of soil-bentonite mixture (SBM) which has been developed by the authors is presented. Third, environmental acceptability of pile installation through clay layer at closed landfill sites is discussed. The developed construction technique for SBM is implemented by employing the trench cutting and re-mixing deep wall method (TRD method) to achieve homogeneity of the wall. The trench cutting is first conducted supplying bentonite slurry to maintain the workability of the soil inside the trench, and then re-mixing with bentonite powder is conduced in the trench. In this paper, the construction method and the laboratory testing results on the hydraulic barrier performance of SBM focusing on its chemical compatibility is presented. Environmental acceptability of pile installation has been a concern when, in the redevelopment of closed waste landfills (e.g. the coastal landfill sites), steel pile foundation may be employed to obtain the bearing capacity of the facilities to be constructed. When piles are installed to reach the bearing layer beneath the clay layer, the leakage of leachate through the interface between the steel pile and the clay layer should be carefully considered to assure the barrier performance of clay layer, since the clay layer is intended to act as a barrier layer. This paper presents the research attempts to measure the interface transmissivity values between the steel and the clay, and confirms that the amount of leakage is negligible for the normally-consolidated state.
In-Situ Containment For Waste Landfill and Contaminated Sites
Abstract Management of waste landfill and contaminated sites has been a great concern in the discipline of geotechnical and geoenvironmental engineering. First, the current Japanese status of remediation of contaminated sites and waste containments are summarized in this paper, particularly focusing on the importance of development of in-situ remediation and containment technologies. Second, a construction technique for the vertical cut-off wall consisting of soil-bentonite mixture (SBM) which has been developed by the authors is presented. Third, environmental acceptability of pile installation through clay layer at closed landfill sites is discussed. The developed construction technique for SBM is implemented by employing the trench cutting and re-mixing deep wall method (TRD method) to achieve homogeneity of the wall. The trench cutting is first conducted supplying bentonite slurry to maintain the workability of the soil inside the trench, and then re-mixing with bentonite powder is conduced in the trench. In this paper, the construction method and the laboratory testing results on the hydraulic barrier performance of SBM focusing on its chemical compatibility is presented. Environmental acceptability of pile installation has been a concern when, in the redevelopment of closed waste landfills (e.g. the coastal landfill sites), steel pile foundation may be employed to obtain the bearing capacity of the facilities to be constructed. When piles are installed to reach the bearing layer beneath the clay layer, the leakage of leachate through the interface between the steel pile and the clay layer should be carefully considered to assure the barrier performance of clay layer, since the clay layer is intended to act as a barrier layer. This paper presents the research attempts to measure the interface transmissivity values between the steel and the clay, and confirms that the amount of leakage is negligible for the normally-consolidated state.
In-Situ Containment For Waste Landfill and Contaminated Sites
Katsumi, Takeshi (Autor:in) / Invui, Toru (Autor:in) / Kamon, Masashi (Autor:in)
Advances in Environmental Geotechnics ; 248-258
01.01.2010
11 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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