Abstract
Many rock avalanches were triggered by the Wenchuan earthquake on May 12, 2008 in southwest China. Protection galleries covered with a single soil layer are usually used to protect against rockfall. Since one-layer protection galleries do not have sufficient buffer capacity, a two-layered absorbing system has been designed. This study aims to find whether an expanded poly-styrol (EPS) cushion, which is used in the soil-covered protection galleries for shock absorption, could be positioned under dynamic loadings. The dynamic impacts of the two-layered absorbing system under the conditions of rock avalanches are numerically simulated through a 2D discrete element method. By selecting reasonable parameters, a series of numerical experiments were conducted to find the best combination for the two-layered absorbing system. The values of the EPS layer area as a percentage of the total area were set as 0% (S1), 22% (S2), and 70% (S3). 22% of the area of the EPS layer was found to be a reasonable value, and experiments were conducted to find the best position of the EPS layer in the two-layered absorbing system. The numerical results yield useful conclusions regarding the interaction between the impacting avalanches and the two-layered absorbing system. The soil layer can absorb the shock energy effectively and S2 (0.4-m thick EPS cushion covered with soil layer) is the most efficient combination, which can reduce the impact force, compared with the other combinations.
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References
Berthet-Rambaud P, Mazars J, Daudeville L (2004) Numerical modeling of rockfall impacts on reinforced concrete slabs for the design of new rock sheds. In Proceedings Framcos 5: 957–964.
Bourrier F, Nicot F, Darve F (2008) Physical processes within a 2D granular layer during an impact. Granular Matter 10(6): 415–437. DOI: 10.1007/s10035-008-0108-0
Bi Y, He S, Li X, et al. (2016) Effects of segregation in binary granular mixture avalanches down inclined chutes impinging on defending structures. Environmental Earth Sciences 75(3): 1–8. DOI 10.1007/s12665-015-5076-1
Calvetti F, Di Prisco C, Vecchiotti M (2005) Experimental and numerical study of rock-fall impacts on granular soils. Rivista Italiana di Geotecnica 4: 95–109.
Calvetti F (2011) Rockfall shelters covered by granular layers: Experiments and design approach. European Journal of Environmental and Civil Engineering 15(sup1): 73–100. DOI: 10.1080/19648189.2011.9695305
Chaplot V, Walter C, Curmi P (2000) Improving soil hydromorphy prediction according to DEM resolution and available pedological data. Geoderma 97(3): 405–422. DOI: 10.1016/S0016-7061(00)00048-3
Cheng Y P, Bolton M D, Nakata Y (2004) Crushing and plastic deformation of soils simulated using DEM. Geotechnique 54(2): 131–141.
Cui P, Chen XQ, Zhu YY, et al. (2011) The Wenchuan earthquake (May 12, 2008), Sichuan province, China, and resulting geohazards. Natural Hazards 56(1): 19–36. DOI: 10.1007/s11069-009-9392-1
Cundall P A, Strack OD (1979) A discrete numerical model for granular assemblies. Geotechnique 29(1): 47–65.
Hentz S, Donzé FV, Daudeville L (2005) Discrete elements modeling of a reinforced concrete structure submitted to a rock impact. Italian Geotechnical Journal 39(4): 83–94.
Hinson RK, Kocher WM (1996) Model for effective diffusivities in aerobic biofilms. Journal of Environmental Engineering 122(11): 1023–1030. DOI: 10.1061/(ASCE)0733-9372(1996)122:11(1023)
Ikeda K, Kishi N, Kawase R, et al. (1999) A practical design procedure of three-layered absorbing system. In Proceedings of the Joint Japan–Swiss Scientific Seminar, Department of Civil Engineering, Kanazawa University Japan. pp 113–119.
Itasca, Consulting Group Inc. (2002) PFC2D Particle Flow Code in 2 Dimensions. User’s Guide. Minneapolis.
Kawahara S, Muro T (2006) Effects of dry density and thickness of sandy soil on impact response due to rockfall. Journal of Terramechanics 43(3): 329–340. DOI: 10.1016/j.jterra.2005.05.009
Kishi N, Nakano O, Mikami H, et al. (1993) Field test on shockabsorbing effect of three-layered absorbing system. In Transactions of the 12 international conference on Structural Mechanics in Reactor Technology (SMiRT) Volume J: Structural dynamics and extreme loads analysis.
Koyama T, Jing L (2007) Effects of model scale and particle size on micro-mechanical properties and failure processes of rocks—A particle mechanics approach. Engineering analysis with boundary elements 31(5): 458–472. DOI: 10.1016/j.enganabound.2006.11.009
Li X, He S. (2009) Seismically induced slope instabilities and the corresponding treatments: the case of a road in the Wenchuan earthquake hit region. Journal of Mountain Science 6(1): 96–100. DOI: 10.1007/s11629-009-0197-1
Matsuda Y, Iwase Y (2002) Numerical simulation of rock fracture using three-dimensional extended discrete element method. Earth, Planets, and Space 54: 367–378. DOI: 10.1186/BF03352426
Masuya H, Labiouse V (1999) Impact load by rock falls and design of protection structures. Joint Japan-Swiss Scientific Semminar: 163–171.
Mommessin M, Perrotin P, Ma Y (2012) Actions of snow avalanches on a protection gallery. Cold Regions Science and Technology 83:20–29. DOI:10.1016/j.coldregions.2012.05.015
Mougin JP, Perrotin P, Mommessin M, et al. (2005) Rock fall impact on reinforced concrete slab: an experimental approach. International Journal of Impact Engineering 31(2):169–183. DOI:10.1016/j.ijimpeng.2003.11.005
Potyondy DO, Cundall PA (2004) A bonded-particle model for rock. International Journal of Rock Mechanics and Mining Sciences 41(8): 1329–1364. DOI: 10.1016/j.ijrmms.2004.09.011
Shirai T, Kambayashi A, Ohno T, et al. (1997) Experiment and numerical simulation of double-layered RC plates under impact loadings. Nuclear Engineering and Design 176(3): 195–205. DOI:10.1016/S0029-5493(97)00142-8
Shiu WJ, Donzé FV, Magnier SA (2005) Numerical study of rockfalls on covered galleries by the Discrete Elements Method. Discrete Element Group for Risk Mitigation 2004: 67–81.
Takahara T, Miura K (1998) Mechanical characteristics of EPS block fill and its simulation by DEM and FEM. Soils and foundations 38(1): 97–110. DOI: org/10.3208/sandf.38.97
Tsuji Y, Tanaka T, Ishida T (1992) Lagrangian numerical simulation of plug flow of cohesionless particles in a horizontal pipe. Powder technology 71(3): 239–250. DOI 10.1016/0032-5910(92)88030-L
Yin Y, Wang F, Sun P (2009) Landslide hazards triggered by the 2008 Wenchuan earthquake, Sichuan, China. Landslides 6(2): 139–152. DOI: 10.1007/s10346-009-0148-5
Zhang M, Yin Y, Wu S, et al. (2011) Dynamics of the Niumiangou Creek rock avalanche triggered by 2008 Ms 8.0 Wenchuan earthquake, Sichuan, China. Landslides 8(3): 363–371. DOI 10.1007/s10346-011-0265-9
Zhou GD, Ng CWW (2010) Numerical investigation of reverse segregation in debris flows by DEM. Granular Matter 12(5): 507–516. DOI: 10.1007/s10035-010-0209-4
Zhou GD, Sun QC (2013) Three-dimensional numerical study on flow regimes of dry granular flows by DEM. Powder Technology 239: 115–127. DOI: 10.1016/j.powtec.2013.01.057
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Bi, Yz., He, Sm., Li, Xp. et al. Geo-engineered buffer capacity of two-layered absorbing system under the impact of rock avalanches based on Discrete Element Method. J. Mt. Sci. 13, 917–929 (2016). https://doi.org/10.1007/s11629-014-3354-0
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DOI: https://doi.org/10.1007/s11629-014-3354-0