基于PFC^(3D)的三轴数值试验模型在建筑垃圾堆填体稳定性分析中的应用  

Application of Numerical Simulation of Triaxial Tests on Stability Analysis of Construction Waste Slope Based on PFC^(3D)

作　　者：苗雨[1] 陈海滨[2] 

机构地区：[1]华中科技大学土木工程与力学学院,湖北武汉430074 [2]华中科技大学环境科学与工程学院,湖北武汉430074

出　　处：《环境与可持续发展》2017年第3期74-77,共4页Environment and Sustainable Development

基　　金：国家自然科学基金面上项目(NO51378234)

摘　　要：随着我国的城镇化进程加速显著,建筑垃圾堆填体数量急剧增加,存在失稳滑坡的潜在危险,现有研究对于建筑垃圾堆填体稳定性的研究缺乏理论支撑。为此,本文首先选取典型建筑垃圾堆填材料进行了室内三轴试验,确定与该三轴试验对应的颗粒流数值模拟细观参数;然后建立基于PFC^(3D)三轴数值试验模型,得到较为统一的强度参数;最后利用FLAC^(3D)软件和计算得到的强度参数分析了实际建筑垃圾堆填体的稳定性。数值算例表明,应用本文方法判断建筑垃圾堆填体的安全系数,具有一定的普适性,可用于分析同类工程在堆填过程中的坡体稳定性。With rapid progress of urbanization in China,the quantity of construction waste accumulation has increased dramatically,and there is a potential danger of destabilizing landslide.The existing research lacks theoretical support for the study of the stability of construction waste accumulation.In this paper,we first carried out an indoor triaxial scaled test for typical construction waste material,and the numerical parameters of the particle flow code corresponding to the triaxial test were determined.A numerical simulation of triaxial tests based on PFC3D was established,and a more uniform and stable strength parameters were obtained.Finally,the stability of an actual construction waste accumulation was analysed according to the calculated strength parameters by FLAC3D software. The numerical example shows that,it has certain applicability and can be used to analyze the stability of the slope of the similar project in the process of landfill by using the method in this paper to judge the safety factor of the construction waste accumulation engineering.

关 键 词：建筑垃圾 离散元理论 颗粒流 三轴试验 稳定性 

分 类 号：X799.1[环境科学与工程—环境工程]