大型泄洪排沙闸预应力闸墩结构模型试验研究

Study on model test for a large scale prestressed pier of a flood releasing and scouring sluice

本文详细描述某抽水蓄能电站泄洪排沙闸大型预应力闸墩结构模型试验的模型比尺与材料选择、混凝土配合比、模型制作、结构受力性能测试构件的布置和测试系统、加载系统以及试验流程等研究过程。对试验数据进行归纳、整理和分析,得到在各种预定工况下的预应力预压效果和闸墩颈部、闸墩与锚块接触处及锚块等控制部位的受力状态,研究在超载情况下闸墩结构的承载能力,提出进一步改进结构设计的建议。

This article describes in detail the structural model test of a large prestressed pier used by a flood releasing and scouring sluice of a pump-storage power station,focusing on the followings： the scale and materials of the model,concrete mix,model building,arrangement of structure components being tested for bearing performance,testing system,loading system as well as test procedure.Through summarizing,sorting and analyzing the test data,the authors obtained the prestressed preloading effect and the stresses at the control points such as the pier neck and the pier-anchor block contacts under different given construction conditions.The bearing capacity of pier at overloading is analyzed and some suggestions for further improvement of pier structure design are proposed in this paper.