大推力预应力闸墩的设计方法

Study on the Design Method of Prestressed Concrete Sluice Bearing Large Pressure

在广泛调查研究的基础上，运用理论分析和仿真模型试验的研究方法，对预应力闸墩的结构形式和设计方法进行了探讨，提出了预应力闸墩的开缝锚块结构形式和预应力闸墩设计方法，包括颈部、锚块和闸墩体内锚束锚固区的设计计算方法，并提出了颈部按部分预应力设计的思想．对比试验分析表明：开缝锚块结构形式可提高颈部的预压应力效果，减少锚束的数量，降低工程成本；预应力闸墩按部分预应力设计是完全可行的．本文的研究成果对今后预应力闸墩的设计和我国《水工混凝土结构设计规范》的修订有一定的参考价值．

On the basis of a systematic investigation of actual engineering, thoretical research and a set of imitative model tests, a new structure style, called the hollow-web anchor block, and design methods of PC sluice, including neck, anchor block and inner anchorage zone of PC sluice, are presented in this paper. Designing neck of PC sluice in accordance with partial prestressed fundamentals is proposed, too. The results of imitative model test have showed that the area of prestressed reinforcement can be reduced due to adopting the hollow-web anchor block and the partial prestressed fundamentals can be used to design the neck of PC sluice.