Abstract
Locked segments are recognized as a critical role that controls the stability of rock slopes but remain an unclear and challenging problem with respect to their role incorporated into the failure mechanism. In order to study the effect of the locked segments on the initial failure process of rockslides, thirty-six groups of locked segment specimens with three different lithologies were prepared, direct shear tests were carried out to obtain the accelerations caused by brittle failure of the locked segment specimens. Experiment results showed that the maximum accelerations caused by the brittle failure of locked segment specimens was 2.91 g in the horizontal direction, and 3.18 g in the vertical direction. We took the Wangjiayan rockslide in 2008 Wenchuan earthquake as an example, the critical balance condition of the sliding mass under combined effect of gravity and accelerations induced by brittle failure of locked segment was analyzed, which indicated that the initial failure process of the Wangjiayan rockslides was notably influenced by the existence of the locked segment. The departure acceleration and direction of the Wangjiayan rockslide were proposed. The study results can provide a new insight into the understanding of the initial failure mechanism of rockslides with locked segments.
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References
Braathen A, Blikra LH, Berg SS, et al. (2004) Rock-slope failures in Norway; type, geometry, deformation mechanisms and stability. Norwegian J Geol 84(1):67–88.
Cao P, Liu TY, Pu CZ, et al. (2015) Crack propagation and coalescence of brittle rock-like specimens with pre-existing cracks in compression. Eng Geol 187: 113–121. https://doi.org/10.1016/j.enggeo.2014.12.010
Chen HR, Qin SQ, Xue L, et al. (2018) A physical model predicting instability of rock slopes with locked segments along a potential slip surface. Eng Geol 242: 34–43. https://doi.org/10.1016/j.enggeo.2018.05.012
Cheng QG, Hu GT (2008) Onset of rockslide by the peak-residual strength drop. Proceedings of the Tenth International Symposium on Landslides and Engineered Slopes, CRC Press, pp 1119–1125. https://doi.org/10.1201/9780203885284-c147
Eberhardt E, Stead D, Coggan JS (2004) Numerical analysis of initiation and progressive failure in natural rock slopes - the 1991 Randa rockslide. Int J Rock Mech Min Sci 41(1): 69–87. https://doi.org/10.1016/S1365-1609(03)00076-5
Gehle C, Kutter HK (2003) Breakage and shear behaviour of intermittent rock joints. Int J Rock Mech Min Sci 40(5): 687–700. https://doi.org/10.1016/S1365-1609(03)00060-1
Glastonbury J, Fell R (2010) Geotechnical characteristics of large rapid rock slides. Can Geotech J 47(1): 116–132. https://doi.org/10.1139/T09-080
Gomberg J, Bodin P, Savage W, et al. (1995) Landslide faults and tectonic faults, analogs? The Slumgullion earthflow, Colorado. Geology 23(1): 41–44. https://doi.org/10.1130/0091-7613(1995)023<0041:LFATFA>2.3.CO;2
Guo QF, Pan JL, Cai MF, et al. (2020) Investigating the effect of rock bridge on the stability of locked section slopes by the direct shear test and acoustic emission technique. Sensors 20(3): 638. https://doi.org/10.3390/s20030638
Hajiabdolmajid V, Kaiser PK, Martin CD (2002) Modelling brittle failure of rock. Int J Rock Mech Min Sci 39(6): 731–741. https://doi.org/10.1016/S1365-1609(02)00051-5
Hendron AJ, Patton FD (1987) The VAJONT slide - A geotechnical analysis based on new geologic observations of the failure surface. Eng Geol 24(1): 475–491. https://doi.org/10.1016/0013-7952(87)90080-9
Huang D, Zhong Z, Gu DM (2019) Experimental investigation on the failure mechanism of a rock landslide controlled by a steep-gentle discontinuity pair. J Mt Sci 16(6): 1258–1274. https://doi.org/10.1007/s11629-018-5333-3
Huang RQ (2009) Some catastrophic landslides since the twentieth century in the southwest of China. Landslides 6(1): 69–81. https://doi.org/10.1007/s10346-009-0142-y
Huang RQ (2012) Mechanisms of large-scale landslides in China. Bull Eng Geol 71(1): 161–170. https://doi.org/10.1007/s10064-011-0403-6
Huang RQ, Chen GQ, Guo F, et al. (2016) Experimental study on the brittle failure of the locking section in a large-scale rock slide. Landslides 13(3): 583–588. https://doi.org/10.1007/s10346-015-0673-3
King J, Loveday I, Schuster RL (1989) The 1985 Bairaman landslide dam and resulting debris flow, Papua New Guinea. Q J Eng Geol Hydrogeol 22(4): 257–270. https://doi.org/10.1144/GSL.QJEG.1989.022.04.02
Melosh H (1996) Dynamical weakening of faults by acoustic fluidization. Nature 379: 601–606. https://doi.org/10.1038/379601a0
Walter M, Arnhardt C, Joswig M (2012) Seismic monitoring of rockfalls, slide quakes, and fissure development at the Super-Sauze mudslide, French Alps. Eng Geol 128(1): 12–22. https://doi.org/10.1016/j.enggeo.2011.11.002
Tang HM, Liu X, Hu XL, et al. (2015) Evaluation of landslide mechanisms characterized by high-speed mass ejection and long-run-out based on events following the Wenchuan earthquake. Eng Geol 194: 12–24. https://doi.org/10.1016/j.enggeo.2015.01.004
Tang P, Chen GQ, Huang RQ, et al. (2020) Brittle failure of rockslides linked to the rock bridge length effect. Landslides 17(4): 793–803. https://doi.org/10.1007/s10346-019-01323-3
Wang PT, Liu C, Qi ZW, et al. (2022) A rough discrete fracture network model for geometrical modeling of jointed rock masses and the anisotropic behaviour. Appl Sci 12(3): 1720. https://doi.org/10.3390/app12031720
Wu Y, Zhang M, Yang L, et al. (2021) Failure mechanisms and dynamics of the Shanzao rockslide in Yongjia County, China on 10 August 2019. Landslides 18(7): 2565–2574. https://doi.org/10.1007/s10346-021-01673-x
Xing AG, Wang GH, Yin YP, et al. (2016) Investigation and dynamic analysis of a catastrophic rock avalanche on September 23, 1991, Zhaotong, China. Landslides 13(5): 1035–1047. https://doi.org/10.1007/s10346-015-0617-y
Xue D, Li T, Zhang S, et al. (2018) Failure mechanism and stabilization of a basalt rock slide with weak layers. Eng Geol 233: 213–224. https://doi.org/10.1016/j.enggeo.2017.12.005
Yerro A, Alonso EE, Pinyol NM (2016) Run-out of landslides in brittle soils. Comput Geotech 80: 427–439. https://doi.org/10.1016/j.compgeo.2016.03.001
Yin YP, Zheng W, Li XC, et al. (2011) Catastrophic landslides associated with the M8.0 Wenchuan earthquake. Bull Eng Geol 70: 15–32. https://doi.org/10.1007/s10064-010-0334-7
Zare S, Karimi-Nasab S, Jalalifar H (2021) Analysis and determination of the behavioral mechanism of rock bridges using experimental and numerical modeling of non-persistent rock joints. Int J Rock Mech Min Sci 141: 104714. https://doi.org/10.1016/j.ijrmms.2021.104714
Zhang M, McSaveney M, Shao H, et al. (2018) The 2009 Jiweishan rock avalanche, Wulong, China: Precursor conditions and factors leading to failure. Eng Geol 233: 225–230. https://doi.org/10.1016/j.enggeo.2017.12.010
Zhao XY, HU HT (2015) Classification and sudden initiation mechanism of large landslides triggered by 2008 Wenchuan earthquake. J Eng Geol 23(1): 78–85. https://doi.org/10.13544/j.cnki.jeg.2015.01.012 (In Chinese)
Zhao XY, Hu K, Liang Y, et al. (2018) Experiment on sudden departure triggered by shearing vibration for locked segment of Wangjiayan landslide China. Chin J Rock Mech Eng 37(1): 104–111. https://doi.org/10.13722/j.cnki.jrme.2017.0438 (In Chinese)
Zhao XY, Hu K, Burns SF, et al. (2019) Classification and sudden departure mechanism of high-speed landslides caused by the 2008 Wenchuan earthquake. Environ Earth Sci 78(5): 1–13. https://doi.org/10.1007/s12665-019-8083-9
Acknowledgements
This research was financially supported by the National Natural Science Foundation of China (Grant No. 41672295). The authors would like to thank anonymous reviewers for their constructive comments.
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Hu, K., Zhao, Xy. & Zhang, Gz. Dynamic behaviors of rockslides subjected to brittle failure of locked segments. J. Mt. Sci. 20, 532–541 (2023). https://doi.org/10.1007/s11629-022-7470-y
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DOI: https://doi.org/10.1007/s11629-022-7470-y