论文部分内容阅读
针对南水北调中线总干渠渡槽流量大、荷载大、槽身过水断面大，普通梁式渡槽难以满足要求的特点，提出了新型矩型截面多厢互联预应力混凝土连续梁式渡槽．这种型式渡槽刚度大、承载能力大、跨越能力大，是一种适用于大流量输水渡槽的经济合理的新型结构。文中介绍了这种渡槽的结构设计方法，包括槽身跨度和横截面尺寸的确定原则；纵向、横向和竖向预应力钢筋及锚固体系的选择；按平面问题和按空间问题分析方法以及槽身结构承载能力极限状态和正常使用极限状态设计要求等内容．分析结果表明，这种渡槽空间受力效应明显，宜采用平面问题与空间问题相结合的分析方法。
Aiming at the characteristics of the aqueduct of the Middle Route of South - to - North Water Diversion Project, such as high flow rate, large load, large cross section of aqueduct and difficult to meet the requirements of common beam aqueduct, a new type of continuous cross - section prestressed concrete continuous beam aqueduct with rectangular cross section is proposed. This type of aqueduct has high rigidity, large carrying capacity and large span capability, which is a new economical and reasonable structure suitable for large flow aqueducts. The paper introduces the design method of this kind of aqueduct structure, including the principle of determining the span and cross section of the body, the choice of longitudinal, transverse and vertical prestressing steel and anchoring system, the analysis of plane and space problems, Structural load capacity limit state and the normal use of the limit state design requirements and so on. The analysis results show that this aqueduct space stress effect is obvious, and the combination of plane and space problems should be adopted.