Proceedings of the Korean Society of Soil and Groundwater Environment Conference (한국지하수토양환경학회:학술대회논문집)

Korean Society of Soil and Groundwater Environment (한국지하수토양환경학회)
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A Study on Clogging and Hydraulic Properties for Drain Filters of Tunnels

터널배수재 필터의 폐색 및 수리적 특성에 관한 연구

  • 문준석 ((주)선진 엔지니어링 종합건축사사무소) ;
  • 한봉수 (동국대학교 토목환경공학과) ;
  • 장연수 (동국대학교 토목환경공학과) ;
  • 이두화 ((주)삼보기술단)
  • Published : 2001.04.01
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Abstract

Durability of tunnel drains is important, because the accumulation of groundwater around the tunnel due to clogging of filter or reduction of discharge capacity of drain causes reduction of the life time of tunnel linings. In this paper, clogging and discharge capacity of drain and filter of tunnels are evaluated using a gradient ratio test and filter design criteria. The results of the gradient ratio test showed that gradient ratio(GR) is high when fine content is high in the soil samples and equivalent opening size(EOS) of filter materials is small. Measured GR was less than allowable critical gradinet ratio : 3.0, which is the clogging criteria of U.S. Army Corps of Engineers.

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