Proceedings of the Korean Geotechical Society Conference (한국지반공학회:학술대회논문집)

Korean Geotechnical Society (한국지반공학회)
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A CASE STUDY OF GROUND CAVE-IN DUE TO SUBSURFACE EROSION IN OLD LAND FILL

  • Kuwano, Reiko (Institute of Industrial Science, the University of Tokyo) ;
  • Kohata, Yukihiro (Department of Civil Engineering and Architecture, Muroran Institute of Technology)
  • Published : 2010.09.09
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Abstract

Ground cave-in is usually initiated by the formation of cavity within the ground due to soil loss. When the location of the cavity is deep in the ground, the detection of the cavity is not easy. Then it is possible that the hidden cavity expands for a long time to eventually cause sudden large-scale collapse. A case of large scale ground collapse in the old fill ground was studied and described in this paper. The underground cavity appeared to be caused by subsurface erosion deep in the ground and to expand/extend upward till it was ended by the catastrophic ground failure. It highlighted the importance of proper drainage work in a large scale land fill.

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