大型垃圾填埋场垃圾挡坝拓建三维有限元数值模拟研究  

Study on Three-dimensional Finite Element Numerical Simulation of Large Landfill Waste Dam Extension

作　　者：宋树祥 李耀晃 黄秋凤 苏智良 王杰 SONG Shuxiang;LI Yaohuang;HUANG Qiufeng;SU Zhiliang;WANG Jie(Grantop Environmental Service Co.,Ltd.Guangzhou 510540,China;Faculty of Civil and Transportation Engineering,Guangdong University of Technology Guangzhou 510006,China)

机构地区：[1]广州环投环境服务有限公司,广州510540 [2]广东工业大学土木与交通工程学院,广州510006

出　　处：《广东土木与建筑》2023年第5期28-31,共4页Guangdong Architecture Civil Engineering

摘　　要：以广州某垃圾填埋场为实际工程案例,利用有限元模拟软件Midas-GTS建立模型,对垃圾填埋场挡坝拓建过程中新旧坝体的垫层连接问题和土工加筋的加筋间距问题进行稳定性分析,同时,将数值模拟结果和现场监测结果对比。研究结果发现:挡坝在拓建时可以使用高强度的垫层减小挡坝的位移,防止新旧坝体间的位移;土工加筋后的坝体位移和塑性应变随着加筋间距的减小而减小;有限元模拟与现场监测数据由于垃圾堆体的存在有较小的差异,变形规律一致。研究分析结果可以为垃圾填埋场挡坝拓建和类似拓建工程提供应用参考和理论指导。A Guangzhou landfill site is taken as a practical engineering case,and the finite element simulation software Midas-GTS is used to establish a model to analyze the stability of the cushion connection between the old and new dam bodies and the reinforcement spacing of geotechnical reinforcement during the construction of the landfill dam.At the same time,the numerical simulation results are compared with the field monitoring results.The results show that the high-strength cushion can be used to reduce the displacement of the retaining dam and prevent the displacement between the old and new dams.The displacement and plastic strain of the dam after reinforcement decrease with the decrease of reinforcement spacing.There is a small difference between the finite element simulation and the field monitoring data due to the existence of the garbage pile,and the deformation law is consistent.The research and analysis results can provide application reference and theoretical guidance for the construction of the landfill dam and similar construction projects.

关 键 词：垃圾填埋场 土工加筋 位移变形 数值模拟 Midas-GTS 

分 类 号：P642.3[天文地球—工程地质学]