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http://dx.doi.org/10.12989/gae.2020.21.2.207

Shear strength behaviors of grouts under the blasting induced vibrations  

Sagong, Myung (Department of Advanced Track & Civil Engineering, KRRI)
Choi, Il Yoon (Department of Advanced Track & Civil Engineering, KRRI)
Lee, Jun S. (Department of Advanced Track & Civil Engineering, KRRI)
Cho, Chung-sik (Geotech Engineering Co. Ltd.)
Publication Information
Geomechanics and Engineering / v.21, no.2, 2020 , pp. 207-213 More about this Journal
Abstract
Umbrella Arch Method (UAM) often employed in the tunnel construction under poor rock mass conditions in Korea. Insertion of steel pipes at the periphery of the tunnel and infiltration of grouts along the pipes into the rock masses increases tunnel stability. There are two major effects of grouts expected at the tunnel face: 1) increase of face stability by enhancing the frictional resistance of discontinuities and 2) decrease of permeability along the rock masses. Increase of resistance and decrease of permeability requires a certain curing time for the grout. In Korea, we require 24 hours for curing of grout, which means no progress of excavation for 24 hours after infiltration of grouts. This step delays the tunnel construction sequences. To eliminate such inefficiency, we propose MTG (Method for Tunnel construction using Grouting technology), which uses extended length of steel pipes (14 m) compared to conventional pipe roof method (12 m). The merit of MTG is the reduction of curing time. Because of the approximately 2 m extension of the length of steel pipe, blasting can be done after infiltration of grouting. For this paper, we conducted experiments on the shear strength behaviors of grout infilled rock joint with elapsing of curing time and blasting induced vibration. The results show that blasting induced vibration under MTG does not influence the mechanical features of grout material, which indicates no influence on the mechanical behaviors of grout, contributing to the stability of tunnels during excavation. This result indicates that MTG is a cost effective and fast construction method for tunneling in Korea.
Keywords
umbrella arch method (UAM); method for tunnel construction using grouting technology (MTG); grouting; tunnel reinforcement;
Citations & Related Records
Times Cited By KSCI : 14  (Citation Analysis)
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1 Aflaki, E. and Moodi, F. (2017) "Laboratory tests for studying the performance of grouted micro-fine cement", Comput. Concrete, 20(2), 145-154. https://doi.org/10.12989/cac.2017.20.2.145   DOI
2 Bamul, M. and Sundqvist, C. (2014), "The effect of blast-induced vibration on grout", M.Sc. Thesis, Chalmers University of Technology, Goteborg, Sweden.
3 Celik, F. (2019), "The observation of permeation grouting method as soil improvement technique with different grout flow models", Geomech. Eng., 17(4), 217-227. https://doi.org/10.12989/gae.2019.19.3.217
4 Jin, Y., Han, H., Meng, Q., Ma, D., Wen, S. and Wang, S. (2018), "Experimental investigation of the mechanical behaviors of grouted crushed coal rocks under uniaxial compression" Geomech. Eng., 16(3), 273-284. https://doi.org/10.12989/gae.2018.16.3.273.   DOI
5 Kim, D. and Park, K. (2017), "Evaluation of the groutin in the sandy ground using bio injection material", Geomech. Eng., 12(5), 739-752. https://doi.org/10.12989/gae.2017.12.5.739.   DOI
6 Kumar, R., Choudhury, D. and Bhargava, K. (2016), "Determination of blast-induced ground vibration equations for rocks using mechanical and geological properties", J. Rock Mech. Geotech. Eng., 8(3), 341-349. http://dx.doi.org/10.1016/j.jrmge.2015.10.009.   DOI
7 Langefors, U., Kihlstrom, B. and Westerberg, H. (1958), "Ground vibrations in blasting", Water Power.
8 MOLIT (2018), Expressway Construction Specification (EXCS) 27 50 15 Reinforcement.
9 Li, L., Xiang, Z., Zou, J. and Wang, F. (2019), "An improved model of compaction grouting considering three-dimensional shearing failure and its engineering application", Geomech. Eng., 19(3), 217-227. https://doi.org/10.12989/gae.2019.19.3.217.   DOI
10 MOLIT (2016), Korean Construction Specification (KCS) 27 50 15 Reinforcement.
11 Ocak, I. and Selcuk, E. (2017), "Comparison of NATM and umbrella arch method in terms of cost, completion time and deformation", Arab. J. Geosci., 10(7), 177. https://doi.org/10.1007/s12517-017-2938-8.   DOI
12 Persson, P.A. (1994), Rock Blasting and Explosives Engineering, CRC Press.
13 Sagong, M., Lee. J., Park, J. and Cho, C. (2018), "An experimental study on the viscosity features of sealant (bentonite-cement slurry) in umbrella arch method", J. Kor. Tunn. Undergr. Sp. Assoc., 20(5), 773-786. https://doi.org/10.9711/KTAJ.2018.20.5.773.   DOI
14 Salimian, M.H., Baghbanan, A., Hashemolhosseini, H., Dehghanipoodeh, M. and Norouzi, S. (2017), "Effect of grouting on shear behavior of rock joint", Int. J. Rock Mech. Min. Sci., 98, 159-166. http://dx.doi.org/10.1016/j.ijrmms.2017.07.002.   DOI
15 Zolfaghari, A., Sohrabi Bidar, A., Maleki Javan, M.R., Haftani, M. and Mehinrad, A. (2015), "Evaluation of rock mass improvement due to cement grouting by Q-system at Bakhtiary dam site", Int. J. Rock Mech. Min. Sci., 74, 38-44. https://doi.org/10.1016/j.ijrmms.2014.12.004.   DOI
16 Stjern, G. and Myrvang, A. (1998), "The influence of blasting on grouted rockbolts", Tunn. Undergr. Sp. Technol., 13(1), 65-77. https://doi.org/10.1016/S0886-7798(98)00021-2.   DOI
17 Lee, H., Oh, T., Park, E., Lee, J. and Kim, H. (2017), "Factors affecting waterproof efficiency of grouting in single rock fracture", Geomech. Eng., 12(5), 771-783. https://doi.org/10.12989/gae.2017.12.5.771.   DOI
18 Wang, Q., Qin, Q., Jiang, B., Yu, H.C., Pan, R. and Li, S.C. (2019), "Study and engineering application on the bolt-grouting reinforcement effect in underground engineering with fractured surrounding rock", Tunn. Undergr. Sp. Technol., 84, 237-247. https://doi.org/10.1016/j.tust.2018.11.028   DOI
19 Zhang, J., Li, S., Li, L., Zhang, Q., Xu, Z., Wu, J. and He, P. (2017), "Grouting effects evaluation of water-rich faults and its engineering application in Qingdao Jiaozhou Bay Subsea Tunnel, China", Geomech. Eng., 12(1), 35-52. https://doi.org/10.12989/gae.2017.12.1.035   DOI
20 Zhang, Q., Zhang L., Liu, R., Li, S. and Zhang, Q. (2017), "Grouting mechanism of quick setting slurry in rock fissure with consideration of viscosity variation with space", Tunn. Undergr. Sp. Technol., 70, 262-273. http://dx.doi.org/10.1016/j.tust.2017.08.016.   DOI