【摘要】 结合南水北调中线工程左岸排水预应力混凝土渡槽结构设计,针对渡槽太阳暴晒温差变化剧烈、长年处于无水状态、洪水期过流历时短且流量变化大等特点,提出了左岸排水预应力混凝土渡槽结构的设计思路。同时根据三维有限元数值模拟计算结果,对比分析各荷载工况下渡槽的受力分布规律,进一步明确了温度效应已成为排水渡槽结构设计中不可忽略的重要因素之一,验证了渡槽设计思路的合理性、有效性。研究成果对同类结构的设计与施工具有重要的工程参考价值。更多还原

【Abstract】 The prestressed concrete drainage aqueduct on the left bank of the Middle Route of South-to-North Water Transfer Project will have no water transferred for almost a whole year while in short flood period the flow changes greatly.It will also suffer from drastic temperature difference between the sunny side and shade side in summer.Considerations for the design of drainage aqueduct are presented,and 3-D finite element calculation is performed to comparatively analyze the stresses and displacements of the aqueduct under all load cases.It’s confirmed that temperature effect on prestressed drainage concrete aqueduct could not afford to be ignored when designing the aqueduct.This research would be referential for the design and construction of similar structures.更多还原