泥石流沿程侵蚀动力过程模拟分析

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摘要在泥石流运动过程中，途经的松散表层材料可能会因泥石流的剪切作用而产生运动，从而形成对沿程地表的侵蚀。为模拟泥石流沿程侵蚀动力过程，并研究沿程侵蚀对泥石流动力过程的影响，结合泥石流动力模型理论和近似Riemann解的HLL有限体积数值离散方法，对一个典型的沿程侵蚀的历史泥石流进行反演计算分析。考虑泥石流动力过程中的沿程侵蚀作用，再现泥石流的动力过程，计算结果与实际泥石流的致灾范围吻合较好，从而验证动力模型理论和数值求解的有效性。同时，与未考虑沿程侵蚀作用的计算结果作比较，结果表明沿程侵蚀作用会增加泥石流的运动体积，从而显著影响泥石流的动力过程，使其具有更大的危害性和更强的破坏力。

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	樊赟赟1
	王思敬2
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	王恩志2
	刘晓丽2

关键词 ：工程地质, 泥石流, 沿程侵蚀, 有限体积法, 动力过程模拟

Abstract：The unconsolidated surface material along the way may have a shear failure and slide with the land during the motion process，as a result，the entrainment of path material on the surface is formed. In order to carry out the simulation of dynamic process of entrainment along the way and study the influence of this entrainment on dynamic process of debris flow，the back analysis is made to study a typical historical debris flow with its erosion along the way，by combining debris flow dynamic model theory and the method of finite volume discretization based on the approximate Riemann solver of HLL scheme. The calculation has considered the entrainment action during the dynamic process of debris flows and reappears the whole process. The calculation results which are identical to actual disaster-caused area confirm the effectivity of the dynamic model theroy and the numerical solution. At the same time，compared with the results which have no consideration of entrainment，it is can be seen that the entrainment action can increase the motion volume of debris flow and enhance the motility so that the dynamic process of debris flows would be greatly influenced；and as a result，the debris flow will be more destructive and harmful.

Key words： engineering geology debris flow entrainment of path material finite volume method dynamic process simulation

引用本文:

樊赟赟1，王思敬2，3，王恩志2，刘晓丽2. 泥石流沿程侵蚀动力过程模拟分析[J]. 岩石力学与工程学报, 2010, 29(S2): 4146-4152.
FAN Yunyun1，WANG Sijing2，3，WANG Enzhi2，LIU Xiaoli2. SIMULATION ANALYSIS OF DYNAMIC PROCESS OF ENTRAINMENT OF PATH MATERIAL BY DEBRIS FLOW. , 2010, 29(S2): 4146-4152.

链接本文:

https://rockmech.whrsm.ac.cn/CN/Y2010/V29/IS2/4146

[1] HUNGR O，EVANS S G. Entrainment of debris in rock avalanches：an analysis of a long run-out mechanism[J]. Geological Society of America Bulletin，2004，116(9–10)：1 240–1 252.

[2] 王纯祥，白世伟，江崎哲郎，等. 基于GIS泥石流二维数值模拟[J]. 岩土力学，2007，28(7)：1 359–1 362.(WANG Chunxiang，BAI Shiwei，ESAKI T，et al. GIS-based two-dimensional numerical simulation of debris flow[J]. Rock and Soil Mechanics，2007，28(7)：1 359–1 362.(in Chinese))

[3] CHIOU M C，WANG Y，HUTTER K. Influence of obstacles on rapid granular flows[J]. Acta Mechanica，2005，175(1–4)：105–122.

[4] PIRULLI M，BRISTEAU M O，MANGENEY A，et al. The effect of the earth pressure coefficients on the runout of granular material[J]. Environmental Modelling and Software，2007，22(10)：1 437–1 454.

[5] SAVAGE S B，HUTTER K. The motion of a finite mass of granular material down a rough incline[J]. Journal of Fluid Mechanics，1989，199：177–215.

[6] 鲁晓兵，张旭辉，崔鹏. 碎屑流沿坡面运动的数值模拟[J]. 岩土力学，2009，30(增2)：524–527.(LU Xiaobing，ZHANG Xuhui，CUI Peng. Numerical simulation of clastic grain flow along a slope[J]. Rock and Soil Mechanics，2009，30(Supp.2)：524–527.(in Chinese))

[7] IVERSON R M，DENLINGER R P. Flow of variably fluidized granular masses across three-dimensional terrain：1. Coulomb mixture theory[J]. Journal of Geophysical Research，2001，106(B1)：537–552.

[8] TEUFELSBAUER H，WANG Y，CHIOU M C. Flow-obstacle interaction in rapid granular avalanches：DEM simulation and comparison with experiment[J]. Granular Matter，2009，11(4)：209–220.

[9] HUNGR O. Numerical modelling of the motion of rapid，flow-like landslides for hazard assessment[J]. KSCE Journal of Civil Engineering，2009，13(4)：281–287.

[10] HUNGR O，MCDOUGALL S. Two numerical models for landslide dynamic analysis[J]. Computers and Geosciences，2009，35(5)：978–992.

[11] MCDOUGALL S，HUNGR O. Dynamic modelling of entrainment in rapid landslides[J]. Canadian Geotechnical Journal，2005，42(5)：1 437–1 448.

[12] 崔芳鹏，胡瑞林，殷跃平，等. 纵横波时差耦合作用的斜坡崩滑效应离散元分析——以北川唐家山滑坡为例[J]. 岩石力学与工程学报，2010，29(2)：319–327.(CUI Fangpeng，HU Ruilin，YIN Yueping，et al. Discrete element analysis of collapsing and sliding response of slope triggered by time difference coupling effects of p and s seismic waves—taking Tangjiashan landslide in Beichuan county as an example[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(2)：319–327.(in Chinese))

[13] 郑书彦，李占斌，李甲平，等. 滑坡侵蚀离散元分析研究[J]. 岩石力学与工程学报，2005，24(12)：2 124–2 128.(ZHENG Shuyan，LI Zhanbin，LI Jiaping，et al. Study on landslide erosion by discrete element method[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(12)：2 124–2 128.(in Chinese))

[14] HARTEN A，LAX P D，VANLEER B. On upstream differencing and Godunov-type schemes for hyperbolic conservation laws[J]. SIAM Review，1983，25(1)：35–61.

[15] ALIPARAST M. Two-dimensional finite volume method for dam- break flow simulation[J]. International Journal of Sediment Research，2009，24(1)：99–107.

[16] OSHER S. Convergence of generalized MUSCL schemes[J]. SIAM Journal of Numerical Analysis，1996，22(5)：947–961.

[17] HUBBARD M E. Multidimensional slope limiters for MUSCL type finite volume schemes on unstructured grids[J]. Journal of Computational Physics，1999，155(1)：54–74.