Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
권호 표지
DOI QR코드

DOI QR Code

The Effect of Remedial Works to Control the Leakage Problem in Earth Fill Dam by Compaction Grouting

콤팩션 그라우팅에 의한 흙댐의 누수복원 공사효과 분석

  • Published : 2006.11.30
Download PDF
⟨ Previous Next ⟩

Abstract

The sinkhole and leakage in dam core were detected at one of earth fill dams in Korea. The damage areas in the core of the dam were repaired by compaction grouting method. This study is to evaluate compaction grouting activity by in-situ and laboratory experiments before, during and after the remedial work. The intensive site investigation and geophysical survey were conducted during and after the compaction grouting work. The compaction grouting work was carried out for the damaged dam core between June 16 and August 24, 2000. The leakage reduction generally occurred in the core of the dam after the remedial work. The use of compaction grouting was considered the proper countermeasures for repairing the damaged dam. It shows that the loose or voided zones have been properly filled and the leakage has been reduced by about 96% of that before the treatment of the remedial work performed at dam core by compaction grouting.

국내의 흙댐 중에서 댐코아에 함몰 및 누수가 발생한 사례가 있었는데 콤팩션그라우팅에 의하여 댐코아의 손상부위를 복원하였다. 본 연구에서는 콤팩션그라우팅에 의한 복원공사전 공사중 및 공사후에 실내 및 현장시험을 통하여 콤팩션그라우팅 효과를 평가하였다. 콤팩션그라우팅공사와 더불어 정밀한 현장조사 및 지구물리탐사를 진행하였다. 콤팩션그라우팅공사는 2000년 6월 16일부터 8월 24일까지 수행되었다. 콤팩션그라우팅공사에 의한 댐복원후에 댐코아의 누수가 감소되었다. 콤팩션그라우팅공사가 손상된 댐을 복원하는데 효과가 큰 것으로 평가되었다. 콤팩션그라우팅공법의 적용에 의하여 댐코아의 느슨하고 공간이 있는 부분을 채우게 되었고 그라우팅 처리전에 비하여 누수량이 약 96% 정도 격감되었다.

Keywords

References

  1. Bemell, L. (1976), 'Control of leakage through dams founded on glacial till deposits', International Congress on Large Dams, Mexico, Q. 45, R.-56
  2. Brown, D. R. and Warner, J. (1973), 'Compaction grouting', Journal of the Soil Mechanics and Foundation Division, ASCE, Vol.99, No.SM8, pp.589-601
  3. Dhar, D.K. (2004), 'Environmental considerations for sustainable dam projects', International Conference On Large Dam (ICOLD) 72nd Annual Meeting, Proceedings Workshop on Dam Safety Problems and Solutions-Sharing Experience, 36-43
  4. Denver Korea Grouting Co. and Hayward Baker International. (2000), Final report on investigation and reinforcement of sink hole in Unmum Dam Core (I, II, III Step)
  5. Korea Infrastructure Safety and Technology Corporation (2005), Report on detail safety investigation for Unmun Dam
  6. Korea Water Resources Corporation (KOWACO) (2000), Report on precise safety diagnosis of Gyeongbuk Cheongdo-gun Unmun Dam
  7. Lim, H.D. Lee, K.H. Lee, J.Y. and B.H. Oh. (2004), 'Leakage investigation, remedial work and its effects on seepage control of Unmum dam', International Conference On Large Dam (ICOLD) nod Annual Meeting, Proceedings Workshop on Dam Safety Problems and Solutions-Sharing Experience, 225-243
  8. Salembier, M., G. Vassiliadis, Y. Le Nindre, and A. A. Souhangir (1998), 'Leakage investigations, safety analysis and proposed remedial measures at large dam', Proc., 66th ICOLD Annual Meeting, New Delhi, 85-95
  9. Saman Construction Technology Co. (2000), Repair and reinforcement works of Unmum Dam
  10. Seemel, R. N. and Colwell, C. N. (1976), 'Drainage provision and leakage investigations of churchill falls dams and dykes', International Congress on Large Dams, Mexico, Q. 45, R. 8
  11. Stewart, R. A., P. C. Gaffran, B. D. Watts, J. C., Sobkowicz, and A. G. Kupper. (1998), WAC Bennett Dam-The characterization of a crest sinkhole, geotechnical site characterization, edited by Robertson and Mayne, Balkema, Rotterdam
  12. Warner, J. (1982), 'Compaction grouting-The First Thirty Years', Proceedings of the Conference on Grouting in Geotechnical Engineering, ASCE, 694-706
  13. Weaver, K. D. (1993), 'Some considerations for remedial grouting for seepage control', Specialty Conference on Geotechnical Practice in Dam Rehabilitation, Geotechnical Division ASCE, New York
  14. Youngnam University & Daebon Engineering Co. (2001), Final report on stability assessment and countermeasures of repair and reinforcement for Unmun Dam