PFC滑坡模拟二、三维建模方法研究

曹文 李维朝 唐斌 邓刚 李俊峰

曹文, 李维朝, 唐斌, 邓刚, 李俊峰. 2017: PFC滑坡模拟二、三维建模方法研究. 工程地质学报, 25(2): 455-462. doi: 10.13544/j.cnki.jeg.2017.02.024
引用本文: 曹文, 李维朝, 唐斌, 邓刚, 李俊峰. 2017: PFC滑坡模拟二、三维建模方法研究. 工程地质学报, 25(2): 455-462. doi: 10.13544/j.cnki.jeg.2017.02.024
CAO Wen, LI Weichao, TANG Bin, DENG Gang, LI Junfeng. 2017: PFC STUDY ON BUILDING OF 2D AND 3D LANDSLIDE MODELS. JOURNAL OF ENGINEERING GEOLOGY, 25(2): 455-462. doi: 10.13544/j.cnki.jeg.2017.02.024
Citation: CAO Wen, LI Weichao, TANG Bin, DENG Gang, LI Junfeng. 2017: PFC STUDY ON BUILDING OF 2D AND 3D LANDSLIDE MODELS. JOURNAL OF ENGINEERING GEOLOGY, 25(2): 455-462. doi: 10.13544/j.cnki.jeg.2017.02.024

PFC滑坡模拟二、三维建模方法研究

doi: 10.13544/j.cnki.jeg.2017.02.024
基金项目: 

自然科学基金 51309259,51379221

自然科学基金 51309259,51379221,41571012

973计划项目 2014CB047004

详细信息
    作者简介:

    曹文 (1992-), 男, 硕士生, 从事地质工程、岩土工程方面的科研工作.Email:cwencugb@163.com

  • 中图分类号: P642.22

PFC STUDY ON BUILDING OF 2D AND 3D LANDSLIDE MODELS

  • 摘要: 滑坡运动过程模拟避免了试验尺度与监测手段的限制,可以详细观察破坏过程,是定量评估滑坡灾变风险的重要研究手段。开展滑坡运动过程模拟的首要工作是建立滑坡模型。颗粒流程序(PFC) 虽然是滑坡运动过程模拟应用最广泛的程序之一,但在建立滑坡模型的前处理方面较弱,使得其在滑坡运动过程模拟中的推广应用受到限制。对此,本文指出了Ball-Ball和Ball-Wall两种建模方法的适用性、优缺点及滑体滑床边界确定方法,并以2014年地震触发的红石岩滑坡为例,以Brick填充法为基础,从获取地形数据、确定滑体和滑床区域、建立滑体和滑床几何模型、生成颗粒模型4个步骤出发,提出了基于数字等高线地形图建立PFC二、三维复杂滑坡模型的前处理方法,弥补了PFC软件前处理的不足,从而为今后基于PFC的滑坡运动过程模拟提供有益的帮助。
  • 图  1  PFC2D和PFC3D建模流程图

    Figure  1.  Modeling flow diagram of PFC2D and PFC3D

    图  2  红石岩滑坡前、后影像 (来自Google Earth)

    a.滑坡前影像 (2013年3月);b.滑坡后影像 (2015年5月)

    Figure  2.  Diagram before and after the sliding of Red Rock (from Google Earth)

    图  3  滑坡前、后等高线叠加图 (比例尺1 : 2000,等高距10m)(改自中国水电顾问集团昆明勘测设计研究院航测地形图)

    Figure  3.  Superposition of contour map before and after the sliding of the landslide (Scale: 1 : 2000, Counter interval: 10m)

    (Modified from Hydro China Kunming Engineering Corporation aerial topographic map)

    图  4  滑坡前、后A-A′剖面图

    Figure  4.  The A-A′ profiles before and after the landslide

    图  5  剖面处理结果图

    Figure  5.  Processing result of the profile

    图  6  Ball-Ball模型和Ball-Wall模型

    a. Ball-Ball模型;b. Ball-Wall模型

    Figure  6.  The Ball-Ball model and Ball-Wall model

    图  7  滑体顶部边界、滑床边界的三维表面模型

    Figure  7.  The 3D surface model of the top boundary of sliding mass and the sliding bed boundary

    图  8  滑体滑床边界的Geometry导入PFC3D

    Figure  8.  Sliding mass and sliding bed geometry imported into PFC3D

    图  9  PFC3D滑坡模型

    Figure  9.  Landslide model of PFC3D

    图  10  PFC3D模拟结果

    Figure  10.  Simulation result by PFC3D

    表  1  不同模型模拟结果

    Table  1.   Results of different modeling methods

    模型PFC
    (Ball-Ball)
    PFC
    (Ball-Wall)
    ROTOMAP+DAN
    滑体体积/m3377~495450450
    滑距/m389573597
    影响范围/m297.537127134.494
    最大速度/m·s-142921
    下载: 导出CSV
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出版历程
  • 收稿日期:  2016-03-10
  • 修回日期:  2016-06-28
  • 刊出日期:  2017-04-25

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