Abstract
To explore the grouting reinforcement mechanism of heterogeneous rock and soil in a fault fracture zone, based on the F2 fault grouting project of Yonglian Tunnel, the filling area composed of loose and soft media in the fault is defined as the advantageous grouting diffusion region, which is divided into loose and weak diffusion regions according to the slurry diffusion form. A self-developed grouting reinforcement test system is used to carry out grouting reinforcement tests on the heterogeneous rock and soil. The existence of the advantageous diffusion region can effectively improve the reinforced body strength. The slurry in the reinforced body containing the loose medium mainly expands outwards in the form of first infiltration and then compaction, and the slurry vein mainly remains in the advantageous diffusion region. The slurry in the reinforced body containing the soft medium mainly diffuses in the form of compaction splitting, which can form thicker splitting of the grouting veins. When the reinforced body is destroyed, the body containing the loose medium is mostly conically fractured, indicating complete lithology and homogeneous material. Moreover, the reinforced body containing the soft medium always forms a penetrating crack along the slurry vein or near the grouting vein. Focusing on the heterogeneous stratum consisting of fault breccia and soft plastic fault gouge, controllable slurry dynamic adjustment, same-hole multi-sequence sub-gradient grouting, and localized grouting control are proposed. The grouting control method is applied to the case of Yonglian Tunnel, and a superior grouting reinforcement effect is achieved.
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References
Boulanger RW, Hayden RF (1995) Aspects of compaction grouting of liquefiable soil. J Geotech Eng 121(12):844–855. https://doi.org/10.1061/(ASCE)0733-9410(1995)121:12(844)
Butrón C, Gustafson G, Fransson Å, Funehag J (2010) Drip sealing of tunnels in hard rock: a new concept for the design and evaluation of permeation grouting. Tunn Undergr Space Technol Inc Trench Technol Res 25(2):114–121
China Planning Press (1999) The National Standards Compilation Group of Peoples Republic of China. GB/T 50266—99 Standard for tests method of engineering rock masses, Beijing (in Chinese)
Cooper BN, Haff JC (1940) Max meadows fault breccia. J Geol 48(8, Part 2):945–974. https://doi.org/10.1086/624932
Huang M, Zhang XD, Xu MK, Cai LQ (2011) Mechanism analysis and criterion for avoiding risk of karst water burst flood illustrated in maluqing tunnel. Adv Mater Res 250–253:2650–2661. https://doi.org/10.4028/www.scientific.net/AMR.250-253.2650
Johnston HM, Wilmot DJ (1992) Sorption and diffusion studies in cementitious grouts. Waste Manag 12(2–3):289–297. https://doi.org/10.1016/0956-053x(92)90055-n
Lakho NA, Zardari MA et al (2016) Reduction of cracking and shrinkage in compressed clay beams during drying. Mehran Univ Res J Eng Technol 35(3):395–400. https://doi.org/10.22581/muet1982.1603.09
Li SC, Zhang WJ, Zhang QS, Zhang X, Che ZY (2014a) Research on advantage-fracture grouting mechanism and controlled grouting method in water-rich fault zone. Yantu Lixue/Rock Soil Mech 35(3):744–752 (in Chinese)
Li P, Zhang QS, Zhang X, Li SC, Zhang WJ, Li MT (2014b) Analysis of fracture grouting mechanism based on model test. Rock Soil Mech 35(11):3221–3230 (in Chinese)
Li P, Zhang QS, Zhang X, Li SC, Li XH, Zuo JX (2016) Grouting diffusion characteristics in faults considering the interaction of multiple grouting. Int J Geomech 17(5):04016117. https://doi.org/10.1061/(asce)gm.1943-5622.0000815
Li X, Zhang P, He Z, Huang Z, Cheng M, Guo L (2017) Identification of geological structure which induced heavy water and mud inrush in tunnel excavation: a case study on lingjiao tunnel. Tunn Undergr Space Technol 69:203–208. https://doi.org/10.1016/j.tust.2017.06.014
Marone C, Raleigh CB, Scholz CH (1990) Frictional behavior and constitutive modeling of simulated fault gouge. J Geophys Res Solid Earth. https://doi.org/10.1029/JB095iB05p07007
Wong HY, Farmer IW (1973) Hydrofracture mechanisms in rock during pressure grouting. Rock Mech Rock Eng 5(1):21–41. https://doi.org/10.1007/bf01246755
Zhang QS, Li P, Zhang X, Li SC, Yu HY (2015a) Model test of grouting strengthening mechanism for fault gouge of tunnel. Yanshilixue Yu Gongcheng Xuebao/Chin J Rock Mech Eng 34(5):924–934. https://doi.org/10.13722/j.cnki.jrme.2014.0667(in Chinese)
Zhang QS, Li P et al (2015b) Parameters optimization of curtain grouting reinforcement cycle in Yonglian tunnel and its application. Math Probl Eng. https://doi.org/10.1155/2015/615736
Zhang JQ, Li SC, Zhang X, Zhang QS, Li P (2017) Development and application of a new comprehensive grouting reinforcement test system. Chin J Eng. https://doi.org/10.13374/j.issn2095-9389.2017.08.018
Zhang GH, Jiao YY, Ma CX, Wang H, Chen LB, Tang ZC (2018) Alteration characteristics of granite contact zone and treatment measures for inrush hazards during tunnel construction—a case study. Eng Geol 235:64–80. https://doi.org/10.1016/j.enggeo.2018.01.022
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The research reported in this manuscript is funded by the Natural Science Foundation of China (Grant No. U1706223) and Natural Science Foundation of Shandong Province (Grant No. ZR2017MEE070).
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Lan, X., Zhang, X., Li, X. et al. Experimental Study on Grouting Reinforcement Mechanism of Heterogeneous Fractured Rock and Soil Mass. Geotech Geol Eng 38, 4949–4967 (2020). https://doi.org/10.1007/s10706-020-01338-x
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DOI: https://doi.org/10.1007/s10706-020-01338-x