Simulation of debris flow impacting bridge pier tests based 
on smooth particle hydromechanics method

LIANG Heng; LI Ji-lin; LIU Fa-ming; ZHANG Lun; FU Gang; LI Ming-qing; HE Si-ming

doi:10.16285/j.rsm.2020.1107

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Simulation of debris flow impacting bridge pier tests based on smooth particle hydromechanics method

更新时间：2026-06-25

- Simulation of debris flow impacting bridge pier tests based on smooth particle hydromechanics method
- Vol. 42, Issue 5, Pages: 1473-1484(2021)
- 作者机构：
  
  1. 中国科学院成都山地灾害与环境研究所山地灾害与地表过程重点实验室,四川,成都,610041
  2. 中国国家铁路集团有限公司,北京,100844
  3. 中国中铁二院工程集团有限责任公司,四川,成都,610031
  4. 成兰铁路有限责任公司,四川,成都,610031
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2020.1107
  CLC： U443.22
- Online First：08 May 2021，
  
  Published：2021
- 稿件说明：
移动端阅览
LIANG Heng, LI Ji-lin, LIU Fa-ming, et al. Simulation of debris flow impacting bridge pier tests based on smooth particle hydromechanics method[J]. 2021, 42(5): 1473-1484.
DOI：

LIANG Heng, LI Ji-lin, LIU Fa-ming, et al. Simulation of debris flow impacting bridge pier tests based on smooth particle hydromechanics method[J]. 2021, 42(5): 1473-1484. DOI： 10.16285/j.rsm.2020.1107.

摘要

采用Bingham流体模型描述泥石流的动力学行为，将桥墩视为地形条件，在光滑粒子流体动力学（smooth particle hydromechanics，简称SPH）方法的框架上引入边界斥力改进边界条件，构建了泥石流冲击桥墩的三维数值计算模型。基于水槽试验对不同黏性的泥石流冲击桥墩的堆积过程及冲击力时程曲线特性进行了分析，根据水槽试验建立物理模型，实现了不同流变参数和重度的泥石流冲击桥墩的三维动力演化过程模拟，并对不同流变参数的泥石流堆积过程及冲击力时程曲线模拟结果进行了分析。从流体力学的角度对模拟结果进行分析，指出忽略湍流形成的能量耗散是导致稀性泥石流运动过程模拟与试验结果差异的主要原因，并讨论了不同黏性条件下泥石流冲击桥墩的防护措施。研究成果为泥石流冲击桥墩三维数值计算模型的进一步优化提供了理论支撑。

Abstract

In this paper

a three-dimensional numerical simulation model is established based on smooth particle hydrodynamics (SPH) method. In this model

the dynamic behavior of debris flow is described by using the Bingham fluid model

and the bridge pier is regarded as the terrain condition. The repulsive force at the boundary is introduced to improve the boundary condition. Based on flume experiments

the accumulation processes of debris flow impacting the bridge pier with various viscosities and characteristics of the impact force-time curves are analyzed. The physical models are established

and the simulation of three-dimensional dynamic evolution processes of debris flow impacting the bridge pier with various rheological parameters and weights are realized. Moreover

the simulation results of the accumulation processes of debris flow with various rheological parameters and the impact force-time curves are analyzed. It is found that there are differences between the simulation results and the experimental results of the dynamic evolution processes of low-viscous debris flow impacting the bridge pier. From the view of fluid mechanics

the primary reason lies in the ignorance of the energy dissipation owing to lack of a description of Reynolds stresses caused by turbulence. Besides

the bridge pier safeguard procedures under the impact of debris flow with various viscosities are discussed. This work provides a theoretical support for further optimization of the three-dimensional numerical calculation model of debris flow impacting the bridge pier.

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Related Institution

State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology

Key Laboratory of Mountain Hazards and Earth Surface Process, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences

University of Chinese Academy of Sciences

China Railway Eryuan Engineering Group Co., Ltd.

School of Civil and Environmental Engineering, University of Science and Technology Beijing

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