A study on the Reduction Scheme of Sediments Deposited on a Lateral Drain Pipe in Tunnel using Centrifugal Tests

원심모형실험을 이용한 터널 측방배수관에 퇴적되는 침전물 저감방안 연구

  • 김태영 (서울산업대 철도전문대학원 철도건설공학과) ;
  • 김유석 (대우건설기술연구원 토목연구팀) ;
  • 박종관 (서울산업대 토목공학과)
  • Published : 2006.11.09

Abstract

Sediments deposited on lateral drain pipes in a tunnel make lateral porous pipes clogged. Since the safety of the tunnel can be affected by this phenomenon, it requires a regular maintenance of the lateral drain pipes. In this study, a series of centrifugal tests were conducted in order to find out the method which can reduce the clogging effect considerably. Four different types of tunnel drain configurations were selected in the experiments. By analysis of sediments for each configuration, the optimum drain configuration that can minimize sedimentation of cement constituents was investigated. As a results, the existing drain configuration which uses filter concrete appear to produce much sediments. In contrast, the new drain configuration appears to be able to reduce sedimentation ratio up to almost 50% comparing with the existing one. From these observations, it may be concluded that the new drain configuration, in which the lateral porous pipes of a tunnel are surrounded by gravel layer and non-woven geotextile, has high efficiency in maintenance.

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