Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
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Fundamental Study on Earthwork Quality Control Based on Intelligent Compaction Technology

지능형 다짐기술을 통한 토공사 품질관리를 위한 기초 연구

  • Baek, Sung-Ha (Korea Institute of Civil Engr. and Building Tech.) ;
  • Kim, Jin-Young (Korea Institute of Civil Engr. and Building Tech.) ;
  • Cho, Jin-Woo (Korea Institute of Civil Engr. and Building Tech.) ;
  • Kim, Namgyu (Korea Institute of Civil Engr. and Building Tech.) ;
  • Jeong, Yeong-Hoon (Korea Institute of Civil Engr. and Building Tech.) ;
  • Choi, Changho (Korea Institute of Civil Engr. and Building Tech.)
  • 백성하 (한국건설기술연구원 미래융합연구본부) ;
  • 김진영 (한국건설기술연구원 미래융합연구본부) ;
  • 조진우 (한국건설기술연구원 미래융합연구본부) ;
  • 김남규 (한국건설기술연구원 미래융합연구본부) ;
  • 정영훈 (한국건설기술연구원 미래융합연구본부) ;
  • 최창호 (한국건설기술연구원 미래융합연구본부)
  • Received : 2020.11.10
  • Accepted : 2020.11.21
  • Published : 2020.12.31
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Abstract

In this paper, intelligent compaction (IC) technology and the earthwork quality control specifications based on IC were analyzed, and the field study was conducted to investigate the relationship between the representative IC value CMV (Compaction Meter Value) and spot test results (plate bearing test and field density test). As the number of roller passes increased, both the CMV and spot test results increased. However, point-by-point comparison between CMV and spot test results yielded poor quality correlations; this is because the ununiform stiffness of the underlying layer and the moisture content of the lift layer affected the CMV and spot test results, respectively. Most international specifications related to IC requires knowledge of the IC values and their relationships with the soil properties obtained by the traditional spot tests. Therefore, for the successful implementation of intelligent compaction technology into earthwork construction practice, the number of roller passes as well as the lift thickness and the moisture content of the soil should be carefully considered.

본 연구에서는 지능형 다짐기술과 이를 활용한 토공사 품질관리 기준을 분석하고, 현장시험을 통해 대표적인 지능형 다짐값인 CMV(Compaction Meter Value)와 일점시험(평판재하시험 및 현장밀도시험) 결과를 비교 분석했다. CMV와 일점시험 결과 모두 다짐횟수가 증가할수록 커지는 경향을 나타냈다. CMV와 일점시험 결과의 상관성은 높지 않았는데, 이는 불균질한 원지반 강성, 성토재료의 포설 깊이 및 함수비가 각각 CMV와 일점시험 결과에 영향을 주었기 때문이다. 지능형 다짐과 관련한 대부분의 국외 기준에서 지능형 다짐값과 일점시험 결과의 상관관계를 바탕으로 토공사 품질을 관리를 하도록 명시하고 있다. 따라서 지능형 다짐기술을 활용해 토공사 현장의 다짐품질을 관리하기 위해서는 적절한 다짐횟수와 더불어 원지반의 상태, 성토재료의 포설 깊이 및 함수비가 종합적으로 고려되어야 할 것으로 판단된다.

Keywords

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