Evaluation of environmental feasibility of steel pipe sheet pile cutoff wall at coastal landfill sites

Shinya Inazumi, Hiroyasu Ohtsu, Yu Otake, Makoto Kimura, Masashi Kamon

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

An evaluation method that can express the local leakage of leachate from joint sections in steel pipe sheet pile (SPSP) cutoff walls is discussed in this study. In particular, the evaluation of environmental feasibility (containment of leachates containing toxic substances) considering a three-dimensional arrangement and hydraulic conductivity distribution of the joint sections in the SPSP cutoff wall is compared with an evaluation that uses the equivalent hydraulic conductivity. This equivalent hydraulic conductivity assumes that the joint section and the steel pipe are integrated; therefore, the hydraulic conductivity is substituted with a uniform permeable layer. However, in an evaluation that employs the equivalent hydraulic conductivity, it is difficult to consider the local leakage of leachate containing toxic substances from the joint sections in the SPSP cutoff wall. It was established that evaluations of the environmental feasibility of SPSP cutoff walls with joint sections must take into account the local leakage of leachates containing toxic substances from the joint sections. Also, it was clarified that technologies that lower the hydraulic conductivities of joint sections in SPSP cutoff walls and also facilitate the use of sparser joint arrangements contribute significantly to increasing the environmental feasibility of SPSP cutoff walls at landfill sites.

Original languageEnglish
Pages (from-to)55-64
Number of pages10
JournalJournal of Material Cycles and Waste Management
Volume11
Issue number1
DOIs
Publication statusPublished - 2009 Jan 1

Keywords

  • Coastal landfill site
  • Environmental feasibility
  • Local leakage of leachate
  • Steel pipe sheet pile
  • Vertical cutoff barrier

ASJC Scopus subject areas

  • Waste Management and Disposal
  • Mechanics of Materials

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