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2024 Vol.25, Issue 5 Preview Page
Evaluation of High-Viscosity Grouting Injection Perfomance for Reinforcement of Rock Joint in Deep-Depth Tunnels

대심도 터널 암반 절리 보강을 위한 고점도 그라우팅 주입 성능 평가

Inkook Yoon1
,
Junho Moon2
,
Younguk Kim3*
윤 인국1
,
문 준호2
,
김 영욱3*
1Graduate student. Department of Civil and Environmental Engineering, Myongji University
2Research Professor, Department of Civil and Environmental Engineering, Myongji University
3Professor, Department of Civil and Environmental Engineering, Myongji University
*Corresponding Author
1 May 2024. pp. 15-19
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Abstract

This study aimed to develop high-efficiency grouting techniques under deep-depth conditions by experimentally verifying the applicability of various injection materials. Particle size analysis and injection model experiments were conducted with Ordinary Portland Cement (OPC) and Micro Cement (MC) to evaluate the injection performance of each material. Using Barton’s Cubic Network theory, the rock fracture spacing was calculated for domestic deep-depth standards, specifically below 40 meters underground. The analysis of particle size passability under selected conditions showed that MC could pass through the rock fracture gaps, while OPC could not. According to the results of the injection model experiments using experimental devices and area calculation software, OPC failed in injection due to its larger particle size, whereas MC was capable of injection even under high-viscosity conditions. Based on these findings, the study quantitatively and visually derived the applicability of grouting materials under deep-depth conditions, and high-viscosity MC material is expected to be effective for waterproofing enhancement in deep-depth rock fracture surfaces.

Keywords
Grouting
Micro cement
High viscosity
Deep-depth tunnel
Ordinary portland cement
Injection model experiment

본 연구는 대심도 조건에서 고효율 그라우팅 기술 개발을 목표로 하여, 다양한 주입 재료의 적용 가능성을 실험적으로 검증하였다. 1종 보통 포틀랜드 시멘트(OPC)와 마이크로 시멘트(MC)의 입자 크기 분석 및 주입 모형 실험을 통해 각 재료의 주입 성능을 평가했다. 국내 대심도 기준, 즉 지하 40미터 이하 조건에서 Barton’s Cubic Network 이론을 활용하여 암반 절리 간격을 산정했으며, 선정된 조건에서 입자 크기의 통과 가능성을 분석한 결과, MC는 암반 절리 간격을 통과한 반면, OPC는 간극을 통과하지 못하였다. 실험 장치 및 면적 계산 프로그램을 활용한 주입 모형 실험 결과에 따르면, OPC는 입자 크기가 크기 때문에 주입에 실패한 반면, MC는 고점도 조건에서도 주입이 가능한 것으로 나타났다. 이러한 연구 결과를 바탕으로, 주입 재료에 따른 대심도 조건에서 그라우트 재료의 적용 가능성을 정량적 및 가시적으로 도출하였으며, 고점도 MC 재료는 대심도 암반 절리면 차수 보강에 효과적일 것으로 예상된다.

키워드
그라우팅
마이크로 시멘트
고점도
대심도
일반 포틀랜드 시멘트
주입모형실험
References
1

Barton, N., Buen, B. and Roald, S. (2001), Strengthening the case for grouting, T&t international, Vol. 33, No. 12, pp. 34~36.

10.1067/mcm.2001.11595811351231
2

Barton, N. (2004a), The Why's and how's of high pressure grouting-Part1, T&t international, Vol. 36, No. 9, pp. 28~30.

3

Barton, N. (2004b), The Why's and how's of high pressure grouting-Part2, T&t international, Vol. 36, No. 10, pp. 33~35.

4

Barton, N. and Quadros, E. (2019), Understanding the need for pre-injection from permeability measurements: What is the connection?, Journal of Rock Mechanics and Geotechnical Engineering, Vol. 11, No. 3, pp. 576~597.

10.1016/j.jrmge.2018.12.008
5

Kim, J. M. and Lee, E. K. (2022), A fundamental study on the criteria of basic parameters for planning rock grouting, JOURNAL OF THE KOREAN GEOTECHNICAL SOCIETY, Vol. 38, No. 2, pp. 15~27 (In Korean).

6

Pettiaux, N., Cassart, M., Paiva, M. and Estenne, M. (1997), "Threeꠓdimensional reconstruction of human diaphragm with the use of spiral computed tomography", J. Appl. Physiol., Vol. 82, No. 3, pp. 998~1002.

10.1152/jappl.1997.82.3.9989074993
7

Rittweger, J., Michaelis, I., Giehl, M., Wüsecke, P. and Felsenberg, D. (2004), "Adjusting for the partial volume effect in cortical bone analyses of pQCT images", J. Musculoskelet Neuronal Interact, Vol. 4, No. 4, pp. 436~441.

8

Yoon, I. K., Moon, J. H., Lee, J. S. and Kim, Y. U. (2021), Characteristic of high-viscosity grouting materials for rock joint reinforcement of depp tunnel, Journal of the korean Geo-Environmental Society, Vol. 22, No. 12, pp. 59~63 (In Korean).

9

Park, D. H. (2010), Environmentally Friendly Characteristics and Durability of Inorganic Reinforcement Materials, Ph. D. Disseration, Hanyang University, Seoul (In Korean).

Information
  • Publisher :Korean Geo-Environmental Society
  • Publisher(Ko) :한국지반환경공학회
  • Journal Title :Journal of the Korean Geo-Environmental Society
  • Journal Title(Ko) :한국지반환경공학회 논문집
  • Volume : 25
  • No :5
  • Pages :15-19
  • Received Date : 2024-03-19
  • Revised Date : 2024-04-08
  • Accepted Date : 2024-04-25
  • DOI :https://doi.org/10.14481/jkges.2024.25.5.15
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