埋地高密度聚乙烯双壁波纹管环刚度选用分析  

Analysis of Ring Stiffness Selection for Buried Double-Wall Corrugated HDPE Pipe

作　　者：罗方冰 LUO Fangbing(Tianjin Municipal Engineering Design&Research Institute Co.Ltd.,Tianjin 300392,China)

机构地区：[1]天津市政工程设计研究总院有限公司,天津300392

出　　处：《天津建设科技》2024年第5期36-39,共4页Tianjin Construction Science and Technology

摘　　要：环刚度的选取是埋地高密度聚乙烯双壁波纹管结构设计的主要环节,采用规范方法与有限元方法,分析了不同管径、覆土厚度与基础中心角下,管道竖向变形及应力,得到管道所需最小环刚度。结果表明:与有限元方法相比,规范方法计算所得管道应力与竖向变形偏大10%~50%;随着管道覆土厚度的增加,两种方法计算结果的差值逐渐增大;管道覆土厚度较小时所需环刚度由环截面强度控制,管道覆土厚度较大时所需环刚度由环截面变形控制,DN300~800 mm管道环刚度控制条件变化的临界覆土厚度为3.5~4.8 m。根据计算结果给出了不同条件下埋地高密度聚乙烯双壁波纹管环刚度选用值。The selection of ring stiffness is a key step in the design of buried double-wall corrugated HDPE pipe.In this paper,both normative methods and finite element methods were used to analyze the vertical deformation and stress of pipes under different pipe diameters,burial depths,and foundation central angles,and to obtain the minimum ring stiffness required for the pipes.The results show that compared with the finite element method,the normative method calculates stress and vertical deformation of pipes that are10%to 50%larger,and the difference between the two methods gradually increases with the increase of burial depth.When the burial depth of the pipe is shallow,the required ring stiffness is controlled by the ring section strength,and when the burial depth is deep,the required ring stiffness is controlled by the ring section deformation.The critical buri⁃al depth for the change of ring stiffness control conditions for DN300~800 mm pipes is between3.5~4.8 m.Based on the calculation results,the selected values of the ring stiffness of buried double-wall corrugated HDPE pipe under different conditions are given.

关 键 词：高密度聚乙烯双壁波纹管道 环刚度 结构设计 环截面变形 

分 类 号：TU992.23[建筑科学—市政工程]