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大坝满管溜槽系统设计方案研究

2021-02-11胥振坡任巧玲

科技资讯 2021年34期

胥振坡 任巧玲

摘  要:根据某水利枢纽大坝工程施工需要,在大坝右岸布置一条满管溜槽输送混凝土,满管溜槽在混凝土施工中已得到普遍应用。但在工程实际应用中也存在堵管、输送寿命短,布置角度要求高等特点,该文结合以往工程的应用情况对满管溜槽系统进行了改良,结合工程实际对满管溜槽系统进行布置、设计,并进行了相应的稳定性计算分析,以供参考。

关键词:满管溜槽  混凝土运输  工程施工  水利工程

中图分类号:TV52  文献标识码:A       文章编号:1672-3791(2021)12(a)-0000-00

Study on Design Scheme of Dam Full Pipe Chute System

XU Zhenpo1   REN Qiaoling2

(1.River lake protection and construction operation safety enter,YRCC,Zhengzhou,Henan Province,45004,china;2.Heihe huangzangsi water control project construction management center,Lanzhou,Gansu Province,730030 China)

Abstract:According to the construction needs of a water control project dam, a full pipe chute is arranged on the right bank of the dam to transport concrete. The full pipe chute has been widely used in concrete construction. However, in the practical application of the project, there are also the characteristics of pipe blockage, short conveying life and high requirements for layout angle. In this paper, the full pipe chute system is improved in combination with the application of previous projects, the full pipe chute system is arranged and designed in combination with the actual engineering, and the corresponding stability calculation and analysis are carried out for reference.

Key Words:Full pipe chute; Concrete transportation; Engineering construction;Water conservancy project

满管溜槽作为垂直运输的一种施工技术,在场地狭小或基础开挖坡度较大的混凝土大坝施工中,能有效地加快施工进度、降低施工成本、减少骨料分离[1]。根据满管溜槽的布置,通过对满管溜槽进料口、满管槽身、出料口的布置进行分析,满管溜槽通过多年的工程实践和不断改进,具有磨损少、利用高、易操作等优点,在水利枢纽工程施工中具有推广价值[2]。

1 满管溜槽系统

大坝主体混凝土通过满管溜槽,自右岸EL2631卸料平台溜向至大坝表面,过程中控制混凝土不发生离析现象。根据混凝土施工强度,并且参考相关工程,选定标准段断面为800 mm,长度为1500 mm,单管输送能力约为180~240 m³/h。

2 满管溜槽布置

混凝土在满管溜槽内下滑过程中不应发生离析,依据《水工碾压混凝土施工规范》(DL/T 5112-2009),满管溜槽布置坡度宜为40°~50°,长度不宜大于100 m,在综合考虑工程现场地形、地质条件,最终确定在大坝右岸布置满管溜槽系统,采用两级满管溜槽接力[3]。……

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