摘要
南水北调工程中线李村北干渠渡槽为梁拱组合式渡槽,总计分十二个阶段建成,过程控制复杂。施工期间,结合现浇梁段布置,将预应力张拉分三个阶段完成,逐步施加预应力。底模支撑以土胎膜为主,碗扣架为辅,可充分适应复杂结构特点。后期卸载时根据体系转换的要求,遵循对称均衡的原则,分四阶段完成,全面实现了设计意图。
Licun North Main Canal Aqueduct of the mid-route of the South-to-North Water Transfer Project is an arch-beam eomposite aqueduct; of which the construction consists of 12 phases and the process control is quite complicated. During the construction, the pre-stress stretch is completed in three stages with the application of pre-stress step by step. The bottom die support mainly consists of soil mold with the complement of steel tube scaffolding with bowl type coupler, which can fully ae- eommodate the complicated structural features concerned. In accordance with the requirement on the system trausibrmation, the formwork is demounted in four stages within the late-phase of tile construction, and then the design intent is completely re- alized at last.
出处
《水利水电技术》
CSCD
北大核心
2013年第1期86-88,92,共4页
Water Resources and Hydropower Engineering
关键词
大跨度
梁拱组合
预应力
渡槽
南水北调工程中线工程
Key words： large span
arch-beam composite
pre-stress
aqueduct
the Mid-route Project of South-to-North Water TransferProject
