All Issue

2023 Vol.25, Issue 6 Preview Page

Research Paper

Analysis of grout injection distance in single rock joint

단일절리 암반에서 그라우팅 주입거리 분석

Ji-Yeong Kim1
,
Jo-Hyun Weon1
,
Jong-Won Lee2
,
Tae-Min Oh3*
김 지영1
,
원 조현1
,
이 종원2
,
오 태민3*
1MS.C. Student, Dept. of Civil & Environmental Engineering, Pusan National University
2Post-Doctoral Researcher, Research Institute of Industrial Technology, Pusan National University
3Associate Professor, Dept. of Civil & Environmental Engineering, Pusan National University
1비회원, 부산대학교 사회환경시스템공학과 석사과정
2정회원, 부산대학교 생산기술연구소 연수연구원
3정회원, 부산대학교 사회환경시스템공학과 부교수
*Corresponding Author
30 November 2023. pp. 541-554
PDF XML Citation
Abstract

The utilization of underground spaces in relation to tunnels and energy/waste storage is on the rise. To ensure the stability of underground spaces, it is crucial to reinforce rock fractures and discontinuities. Discontinuities, such as joints, can weaken the strength of the rock and lead to groundwater inflow into underground spaces. In order to enhance the strength and stability of the area around these discontinuities, rock grouting techniques are employed. However, during rock grouting, it is impossible to visually confirm whether the grouting material is being smoothly injected as intended. Without proper injection, the expected increases in strength, durability, and degree of consolidation may not be achieved. Therefore, it is necessary to predict in advance whether the grouting material is being injected as designed. In this study, we aimed to assess the injection performance based on injection variables such as the water/cement mixture ratio, injection pressure, and injection flow using UDEC (Universal Distinct Element Code) numerical program. Additionally, numerical results were validated by the lab experiment. The results of this study are expected to help optimize variables such as injection material properties, injection time, and pump pressure in the grouting design in the field.

Keywords
Rock grouting
Micro-cement
Numerical simulation
UDEC
Grouting injection test

간의 안정성 확보를 위해서는 암반균열 및 절리를 보강하는 것이 중요하다. 절리와 같은 간의 안정성 확보를 위해서는 암반균열 및 절리를 보강하는 것이 중요하다. 절리와 같은

키워드
암반그라우팅
마이크로시멘트
수치해석
UDEC
주입실험
References
1
Baek, S.H., Joo, H.W., Kwon, T.H., Han, J.T., Lee, J.H., Yoo, W.K. (2020), "Effect of permeability anisotropy on the effective radius of grout bulb in horizontal permeation grouting - numerical study", Journal of the Korean Geotechnical Society, Vol. 36, No. 11, pp. 149-156. 10.7843/kgs.2020.36.11.149
2
Bandis, S.C., Lumsden, A.C., Barton, N.R. (1983), "Fundamentals of rock joint deformation", International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts, Vol. 20, No. 6, pp. 249-268. 10.1016/0148-9062(83)90595-8
3
Barton, N., Choubey, V. (1977), "The shear strength of rock joints in theory and practice", Rock mechanics, Vol. 10, pp. 1-54. 10.1007/BF01261801
4
Barton, N., Lien, R., Lunde, J.J.R.M. (1974), "Engineering classification of rock masses for the design of tunnel support", Rock mechanics, Vol. 6, pp. 189-236. 10.1007/BF01239496
5
Choi, S.O., Chung, S.K. (2004), "Stability analysis of jointed rock slopes with the Barton-Bandis constitutive model in UDEC", International Journal of Rock Mechanics and Mining Sciences, Vol. 41, No. 3, pp. 581-586. 10.1016/j.ijrmms.2004.03.103
6
Hong, S.Y., Kwon, S.H., Min, K.B., Ji, S.H. (2021), "Effect of excavation and thermal stress on slip zone and aperture change around disposal hole and tunnel in fractured rock", Tunnel and Underground Space, Vol. 31, No. 2, pp. 125-144. 10.7474/TUS.2021.31.2.125
7
Jeon, K.H., Ryu, D.W., Kim, H.M., Park, E.S., Song, J.J. (2010), "Numerical analysis of grout flow and injection pressure affected by joint roughness and aperture", Tunnel and Underground Space, Vol. 20, No. 2, pp. 82-91.
8
Kim, J.H., Choi, B.I. (2018), "Mechanical and microstructural analysis of cement suspension", Magazine of the Korea Concrete Institute, Vol. 30, No. 3, pp. 33-37.
9
Kim, J.M., 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. 10.7843/kgs.2012.28.2.15
10
Kim, S.H., Kim, T.K., Choi, J.I., Yim, K.W. (2010), "A study on the injection efficiency and strength for grouting method", Journal of the Korean Geotechnical Society, Vol. 26, No. 9, pp. 47-58. 10.7843/kgs.2011.27.9.047
11
Koh, H.S., Cho, B.J. (2021), "Performance evaluation of injection grouting method for structure foundation ground improvement", Journal of Disaster and Safety, Vol. 3, No. 1, pp. 1-10.
12
Lee, J.W., Kim, H.M., Yazdani, M., Park, E.S. (2017), "Influence of design parameters of grout injection in rock mass using numerical analysis", Tunnel and Underground Space, Vol. 27, No. 5, pp. 324-332. 10.7474/TUS.2017.27.1.058
13
Lee, J.W., Kim, J.Y., Weon, J.H., Oh, T.M. (2022), "Time-dependent characteristics of viscous fluid for rock grouting", Journal of Korean Tunnelling and Underground Space Association, Vol. 24, No. 6, pp. 465-481. 10.9711/KTAJ.2022.24.6.465
14
Lee, W.H., Lim, H.D. (2007), "Analysis of fine particle transfer and shear strength increase using PFC in permeation grouting", Journal of the Korean Geotechnical Society, Vol. 23, No. 11, pp. 49-58. 10.7843/kgs.2007.23.11.49
15
Nam, H.Y., Lee, W.J., Lee, C.H., Choo, H.W. (2018), "Estimation of unconfined compressive strength (UCS) of microfine cement grouted sand", Journal of the Korean Geotechnical Society, Vol. 34, No. 7, pp. 5-15. 10.7843/kgs.2018.34.7.5
16
Oh, J.Y., Park, H.K., Chang, S.B., Choi, H.S. (2018), "Numerical investigation on the effect of backfill grouting on ground behavior during shield TBM tunneling in sandy ground", Journal of Korean Tunnelling and Underground Space Association, Vol. 20, No. 2, pp. 375-392. 10.9711/KTAJ.2018.20.2.375
17
Park, J.H., Park, Y.W. (2003), "Investigation of the optimum injection pressure in pressure grouting by laboratory model tests", Journal of the Korean Geotechnical Society, Vol. 19, No. 2, pp. 217-225.
18
Park, J.W., Park, C.H., Lee, C.S. (2021), "Hydro-mechanical modeling of fracture opening and slip using grain-based distinct element model: DECOVALEX-2023 Task G (Benchmark Simulation)", Tunnel and Underground Space, Vol. 31, No. 4, pp. 270-288. 10.7474/TUS.2021.31.4.270
19
Saeidi, O., Ramezanzadeh, A., Sereshki, F., Jalali, M.E. (2013a), "Numerical modeling of the effects of joint hydraulic aperture, orientation and spacing on rock grouting using UDEC: a case study of Bakhtiary Dam of Iran", Journal of Mining and Environment, Vol. 4, No. 1, pp. 15-26. 10.22044/jme.2013.90
20
Saeidi, O., Stille, H., Torabi, S.R. (2013b), "Numerical and analytical analyses of the effects of different joint and grout properties on the rock mass groutability", Tunnelling and Underground Space Technology, Vol. 38, pp. 11-25. 10.1016/j.tust.2013.05.005
21
Yoon, I.K., Moon, J.H., Lee, J.S., Kim, Y.K. (2021), "Characteristics of high-viscosity grouting materials for rock joint reinforcement of deep tunnel", Journal of the Korean Geo-Environmental Society, Vol. 22, No. 12, pp. 59-63. 10.14481/jkges.2021.22.12.59
Information
  • Publisher :Korean Tunneling and Underground Space Association
  • Publisher(Ko) :한국터널지하공간학회
  • Journal Title :Journal of Korean Tunnelling and Underground Space Association
  • Journal Title(Ko) :한국터널지하공간학회 논문집
  • Volume : 25
  • No :6
  • Pages :541-554
  • Received Date : 2023-10-30
  • Revised Date : 2023-11-13
  • Accepted Date : 2023-11-14
  • DOI :https://doi.org/10.9711/KTAJ.2023.25.6.541
Journal Informaiton Journal of Korean Tunnelling and Underground Space Association Journal of Korean Tunnelling and Underground Space Association
Online Submission & Review System
  • NRF
  • KOFST
  • KISTI Current Status
  • KISTI Cited-by
  • crosscheck
  • orcid
  • open access
  • ccl
Journal Informaiton Journal Informaiton - close