高速远程滑坡岩屑流桩林防控机理分析
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- 英文论文题名：Prevention Effect of Piles on Rock Fragmentation Flow
- 论文作者：程谦恭 ; 王玉峰 ; 宋章 ; 朱圻 ; 李炜 ; 侯文学
- 英文论文作者：Cheng Qiangong ; Wang Yufeng ; Song Zhang ; Zhu Qi ; Li Wei ; Hou Wenxue ; Department of Geological Engineering ; Southwest Jiaotong University ; China Railway Eryuan Engineering Group Co.Ltd
- 年：2016
- 作者机构：西南交通大学地质工程系;中铁二院工程集团有限责任公司;
- 论文关键词：高速远程滑坡岩屑流 ; 桩林结构 ; 灾害防控
- 英文论文关键词：rock fragmentation flow ; pile forest ; disaster mitigation
- 会议召开时间：2016-10-14
- 会议录名称：“川藏铁路建设的挑战与对策”2016学术交流会论文集
- 语种：中文
- 分类号：P642.22;U213.15
- 学会代码：ZGTD
- 会议名称：“川藏铁路建设的挑战与对策”2016学术交流会
- 会议地点：中国四川成都
- 主办单位：中国铁道学会、中国铁道学会工程分会、中国中铁股份有限公司、中铁二院工程集团有限责任公司
- 学会名称：中国铁道学会
- 页数：13
- 文件大小：3064k
- 原文格式：O
- 会议级别：全国
摘要
为了研究多排桩组合而成的桩林结构对干高速远程滑坡岩屑流的防控效能和作用机理,以汶川地震诱发的谢家店子滑坡三维真实地形形态为原型,采用基于Voellmy准则定义运动阻力的计算流体力学软件,分别进行岩屑流运动路径下游布设桩林与不布设桩林防护结构时,碎屑流运动全过程三维动力学行为反演,对比分析相同运动参数条件下的桩林防护结构对高速远程滑坡岩屑流运动与堆积特征所产生的影响。结果表明:在运动路径上布设的桩林防护结构,对碎屑流具有明显的阻滞、耗能、减速效应。有桩林情况下,整个滑坡运动全程持续时间为74s,比无桩林情况下早6s停积;运动距离达到1180m,比无桩林情况下减少90m。桩林有效地减小了碎屑流堆积区的面积,与没有桩林的情况相比,堆积区面积减小了2/3;碎屑流速度受到桩林的阻挡明显地减小,其自身动能也随之减小。桩林中发挥功效最高的是第一排桩,其次是第四排桩。
To study of the disaster mitigation effect of piles on rock fragmentation flow,the propagations of the Xiejiadianzi rock fragmentation flow without and with rows of piles distributed along the travelling path are studied here,with the help of FLUENT by introducing the Voellmy rheological law.And a comprehensive comparison between the results of both conditions is carried out with the following conclusions reached.The arrangement of rows of piles along the travelling path can retard the motion of rock fragmentation flow greatly with obvious energy dissipation and velocity reduction effect appeared.For rock fragmentation flow with rows of piles distributed along its travelling path,the area of its accumulation zone is only two-thirds of that of the model without piles installed.When the debris reached the place where piles installed,its velocity is reduced rapidly.
To study of the disaster mitigation effect of piles on rock fragmentation flow,the propagations of the Xiejiadianzi rock fragmentation flow without and with rows of piles distributed along the travelling path are studied here,with the help of FLUENT by introducing the Voellmy rheological law.And a comprehensive comparison between the results of both conditions is carried out with the following conclusions reached.The arrangement of rows of piles along the travelling path can retard the motion of rock fragmentation flow greatly with obvious energy dissipation and velocity reduction effect appeared.For rock fragmentation flow with rows of piles distributed along its travelling path,the area of its accumulation zone is only two-thirds of that of the model without piles installed.When the debris reached the place where piles installed,its velocity is reduced rapidly.
引文
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[25]HUNGR O,MCDOUGALL S.Two numerical models for landslide dynamic analysis[J].Computers&Geosciences,2009,35:978-992.
[2]Chiou M C,Wang Y,Hutter K.Influence of obstacles on rapid granular flows[J].Acta Mechanica,2005,175,105-122.
[3]Valentino R,Barla G,Montrasio L.Experimental analysis and micromechanical modelling of dry granular flow and impacts in laboratory flume tests[J].Rock Mechanics and Rock Engineering,2008,41(1):153-177.
[4]Teufelsbauer H,Wang Y,Chiou M C,et al.Flow-obstacle interaction in rapid granular avalanches:DEM simulation and comparison with experiment[J].Granular Matter,2009,11(4):209-220
[5]Li X P,He S M,Luo Y,et al.Simulation of the sliding process of Donghekou landslide triggered by the Wenchuan earthquake using a distinct element method[J].Environmental Earth Sciences,2012,65(4):1049-1054
[6]Fan Y Y,Wang S J,Wang E Z,et al.Influence of obstacle angle on granular flow[M]//Jiang et al.(eds),Geomechanics and Geotechnics:From Micro to Macro.London:Taylor&Francis Group,2011:285-291.
[7]吴越,刘东升,李明军.滑体下滑及冲击受灾体过程中的能耗规律模型试验[J].岩石力学与工程学报,2011,30(4):693-701.Wu Y,Liu D S,Li M J.Landslide model experiment for energy dissipation in sliding and impact processes[J].Chinese Journal of Rock Mechanics and Engineering,30(4):693-701.(in Chinese).
[8]吴越,刘东升,李明军.2011b.岩体滑坡冲击能计算及受灾体易损性定量评估[J].岩石力学与工程学报,2011,30(5):901-909.Wu Y,Liu D S,Li M J.2011b.Impact energy calculation for rock slope and quantitative assessment of vulnerability for element at risk[J].Chinese Journal of Rock Mechanics and Engineering,2011,30(5):901-909.(in Chinese)
[9]王学良,张路青,周剑.转折型沟谷对地震崩塌体块石拦截效果分析[J].工程地质学报,2011,19(3):381-387.Wang X L,Zhang L Q,Zhou J.Interception effect of stream valley bends to rock fall blocks in Wenchuan earthquake[J].Journal of Engineering Geology,19(3):2011,381-387.(in Chinese).
[10]Faug T,Caccamo P,Chanut B.Equation for the force experienced by a wall overflowed by a granular avalanche:Experimental verification[J].Physical Review E,2011,84(5),DOI:10.1103/PhysRevE.84.051301.
[11]Faug T,Einav I,Childs P,et al.Diffuse and steep jumps in steady-state granular flows[C]//Smith S T(eds),23rd Australasian Conference on the Mechanics of Structures and Materials(ACMSM23),Byron Bay,Australia,2014:1-6.
[12]Cui X,Gray J M N T.Gravity-driven granular free-surface flow around a circular cylinder[J].Journal of Fluid Mechanics,2013,720:314-337.
[13]Jiang Y J,Towhata I.Experimental study of dry granular flow and impact behavior against a rigid retaining wall[J].Rock Mechanics and Rock Engineering,2013,46:713-729.
[14]Mast C M,Arduino P,Miller G R,et al.Avalanche and landslide simulation using the material point method:flow dynamics and force interaction with structures[J].Computational Geosciences,2014,18(5):817-830.
[15]Prime N,Dufour F,Darve F.Solid-fluid transition modelling in geomaterials and application to a mudflow interacting with an obstacle[J].International Journal for Numerical and Analytical Methods in Geomechanics,2014,38(13):1341-1361.
[16]Caviedes-Voullièmne D,Juez C,Murillo J,et al.2D dry granular free-surface flow over complex topography with obstacles,Parti:experimental study using a consumer-grade RGB-D sensor[J].Computers and Geosciences,2014,73:177-197.
[17]Juez C,Caviedes-Voullieme D,Murillo J,et al.2D dry granular free-surface transient flow over complex topography with obstacles,Part II:Numerical predictions of fluid structures and benchmarking[J].Computers and Geosciences,2014,73:142-163.
[18]Ng C W W,Choi C E,Kwan J S H,et al.Effects of baffle transverse blockage on landslide debris impedance[J].Procedia Earth and Planetary Science,2014,9:3-13
[19]Ng C WW,Choi C E,Song D,et al.Physical modeling of baffles influence on landslide debris mobility[J].Landslides,2015,12:1-18
[20]Choi C E,Ng C W W,Song D,et al.Flume investigation of landslide debris-resisting baffles[J].Canadian Geotechnical Journal,2014,51(5):540-553.
[21]王玉峰,程谦恭,张柯宏,等.岩屑流裹气流态化模型试验研究[J].岩土力学,2014,35(10):2775-2785.Wang Yufeng,Cheng Qiangong,Zhang Ke-hong,et al.Study of fluidized characteristics of rock fragmentation flows under effect of entrapped air[J].Rock and Soil Mechanics,2014,35(10):2775-2785.(in Chinese)
[22]许强,裴向军,黄润秋,等.汶川地震大型滑坡研究[M].北京:科学出版社,2009-1-473.Xu Q,Pei X J,Huang R Q et al.Large-scale landslides induced by the Wenchuan earthquake[M].Beijing:Science Press,2009:1-473.(in Chinese)
[23]王玉峰,程谦恭,朱圻.汶川地震触发岩屑流-碎屑流堆积反粒序特征及机制分析[J].岩石力学与工程学报,2012,31(6):1089-1106.Wang Yufeng,Cheng Qiangong,Zhu Qi.Inverse grading analysis of deposit from rock fragmentation flows triggered by Wenchuan earthquake[J].Chinese Journal of Rock Mechanics and Engineering,2012,31(6):1089-1106.(in Chinese)
[24]王福军.计算流体动力学分析-CFD软件原理与应用[M].北京:清华大学出版社,2004.Wang Fujun.Analysis of computational fluid dynamics software principle and application[M].Beijing:Tsinghua University Press,2004:113-253.(in Chinese)
[25]HUNGR O,MCDOUGALL S.Two numerical models for landslide dynamic analysis[J].Computers&Geosciences,2009,35:978-992.