Journal of the Korean Geosynthetics Society (한국지반신소재학회논문집)

Korean Geosynthetics Society (한국지반신소재학회)
권호 표지
DOI QR코드

DOI QR Code

Development and Reliability Verification of Quality Control System for Compaction Grouting Method

컴팩션 그라우팅 공법의 품질관리 시스템 개발 및 신뢰성 검증

  • Received : 2020.09.04
  • Accepted : 2020.11.02
  • Published : 2020.12.30
Download PDF
⟨ Previous Next ⟩

Abstract

This study introduced the compact grouting method that can be used for improving soft ground and restoring buildings with unequal subsidence. The pump used in the traditional compact grouting method is a system that injects one hole each, which reduces the construction efficiency, and the analog injection method manually manages the construction by field workers, making it difficult to manage consistent quality. Pump and quality control system were developed to solve problems in existing construction. Since field supervisor determines amount of injected materials by using analog equipment and controls manually, it is difficult to manage consistent quality of construction. Therefore, the quality control system was developed in order to solve that problem. The quality control system consists of automatic mixing system of injection materials, multiple simultaneous injection pumps, and injection management monitoring system. Performance of the quality control system was verified through on-site testing, and ground improvement performance was verified through quality testing after testing and testing of the compact grouting method. Therefore, it is expected that the integrated quality control system developed will improve the quality assurance and efficiency and stability of construction at sites where construction and quality verification are difficult.

본 연구에서는 연약지반의 개량 및 부등침하가 일어난 건물의 복원 등에 사용할 수 있는 컴팩션 그라우팅 공법을 소개하였다. 기존 컴팩션 그라우팅 공법에서 사용되는 펌프는 1공씩 주입하는 시스템으로 시공 효율성이 저하되고,아날로그 주입방식으로 현장 작업자가 수동으로 시공을 관리하여 일관된 품질관리가 어려웠다. 기존 시공에서의 문제점을 해결하기 위하여 펌프와 품질관리 시스템을 개발하였다. 품질관리 시스템은 주입재료의 자동 배합 시스템, 다중 동시 주입 펌프, 주입관리 모니터링 시스템으로 구성하였다. 현장 시험을 통해 품질관리 시스템의 성능을 검증하였고 컴팩션 그라우팅 공법의 시험시공 후 품질 시험을 통하여 지반개량 성능을 확인하였다. 따라서 개발된 통합 품질관리 시스템을 활용한다면 시공 및 품질 확인이 어려운 현장에서 일관된 품질의 보장과 시공의 효율성 및 안정성을 향상시킬 수 있을 것으로 기대된다.

Keywords

References

  1. Ahn, J. H. (2018). Evaluation of construction management techniques and standards for the umbrella method, Master Thesis, Department of Global Railroad, Global Convergence Graduate School, Korea National University of Transportation.
  2. ASCE (1997), "Grouting: Compaction, Remediation and Testing", pp.1-337.
  3. ASCE/GI (2010), Compaction Grouting Consensus Guide, ASCE Standard ASCE/G-1, 53-10, ASCE, Reston VA.
  4. Chun, B. S. (2011), "Principles and practice for chemical grouting", Construction Industry Research Institute, Goomibook, pp.191-213.
  5. Chun, B. S., Lim, H. S., Jo, C. H. and Jung, H. C. (1997), "Study on ground reinforcement method for Box structures of a construction project of railroad roadbed of new international airport in capital region", Construction Institute of Hanyang University, pp.7-21.
  6. Chun, B. S. and Yeoh, Y. H. (2003), "Report of application in soft ground C.G.S method for construction project of containment area of dumping dredged soil", Korean Geo-Environmental Society, pp.6-10.
  7. Karol, R. H. (1990), Chemical Grouting, 2nd Edition, Marcel Dekker, New York and Basel.
  8. KC CODE KCS 64 20 50 (2019), Low Fluidity Mortar Injection Technique, pp.1-5.
  9. Lee, E. K. (2015), A Study on Improvement of Rock Grouting Guide, Ph.D Thesis, Sejong University, pp.78-82.
  10. Lee, S. D. (2010), Effectiveness of Vibratory Cement-based Grouting Technique, Master Thesis, Korea University, pp.6-8.
  11. Nam, M. J. (2015). A study on the applicability of automatic grouting system for soil reinforcement, Master Thesis, Department of Civil Engineering, Graduate School of Civil Engineering, Hanyang University.
  12. Warner, J. (1978), "Compaction Grouting-A Significant Case History", Journal of Geotechnical Engineering, Vol. 104, No.7, pp.837-847.