A Study on the Ground Improvement by Compaction Grouting System

C.G.S에 의한 기초지반보강효과에 관한 연구

  • 천병식 (한양대학교 공과대학 토목공학과) ;
  • 여유현 (한양대학교 대학) ;
  • 최현석 (한양대학교 대학) ;
  • 오일석 (덴버코리아 그라우팅(주))
  • Published : 1999.05.01

Abstract

The use of compaction grouting system(C.G.S) evolved in the 1950's to correct structural settlement of buildings. Over the almost 50 years, the technology has developed and is currently used in wide range of applications. Compaction Grouting, the injection of a very stiff 'zero-slump' mortar grout under relatively high pressure, displaces and compacts soils. It can effectively repair natural or man-made soil strength deficiencies in variety of soil formations. Major uses of Compaction Grouting include densifying loose soils or fill voids caused by sinkholes, poorly compacted fills, broken utilities, improper dewatering, or soft ground tunneling excavation. Other application include preventing liquefaction, re-leveling settled structures, and using compaction grout bulbs as structural elements of minipiles or underpinning. So, on the basis of the case history constructed in recent year, a study has been performed to analyze the basic mechanism of the Compaction Grouting and verify the effectiveness of the ground improvement.

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