PFC滑坡模拟二、三维建模方法研究

发布时间：2018-02-28 08:45

本文关键词： 离散元颗粒流滑坡数值模拟　出处：《工程地质学报》2017年02期 　论文类型：期刊论文

【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BallBall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。
[Abstract]:The simulation of landslide movement process avoids the limitation of test scale and monitoring means, and can observe the failure process in detail. It is an important research method for quantitative assessment of landslide disaster risk. The primary work of landslide movement simulation is to establish landslide model. Particle flow program PFC) is one of the most widely used procedures for landslide movement simulation. However, its application in landslide simulation is limited because of its weak pre-treatment in the establishment of landslide model. This paper points out the applicability, advantages and disadvantages of two modeling methods, BallBall and Ball-Wall, as well as the method of determining the boundary of sliding bed. Taking the Hongshiyan landslide triggered by the 2014 earthquake as an example, based on the Brick filling method, from obtaining the topographic data, determining the sliding body and the sliding bed area, establishing the sliding body and sliding bed geometry model and generating the particle model, the paper starts with four steps. The pre-processing method of PFC 2 and 3D complex landslide model based on digital contour topographic map is put forward, which makes up for the deficiency of PFC software pre-processing, and provides useful help for the simulation of landslide movement based on PFC in the future.
【作者单位】：中国水利水电科学研究院流域水循环模拟与调控国家重点实验室;中国地质大学(北京)工程技术学院;中国水务投资有限公司;
【基金】：自然科学基金(51309259,51379221);自然科学基金(51309259,51379221,41571012) 973计划项目(2014CB047004)资助
【分类号】：P642.22

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