抽水蓄能电站拦污栅桥梁设计标准及参数拟定研究

Study on design standard and parameter formulation of trash rack bridge in pumped storage power station

抽水蓄能电站拦污栅桥梁是连接抽水蓄能电站场内交通与进/出水口拦污栅的桥梁结构物,我国至今尚无针对此类桥梁结构的设计标准,以往大多采用公路桥梁的设计经验以及设计标准进行设计。然而拦污栅桥梁与常规的桥梁相比有其特殊性,若按照常规桥梁进行设计,大多数设计参数取值并不适宜。为此,以辽宁清原抽水蓄能电站进/出水口拦污栅桥梁项目为工程背景,结合抽水蓄能电站拦污栅桥梁结构的功能需求以及结构特点,从桥梁宽度的确定、设计荷载的选取、上下部结构形式的选择、附属设施的选择等方面将拦污栅桥梁结构的设计参数取值与常规公路桥梁的设计参数取值进行对比分析,给出了拦污栅桥梁结构设计参数合理取值的建议。同时,对于拦污栅桥梁结构的计算理论及设计荷载特点进行了说明,可为拦污栅桥梁结构的设计提供参考。

The trash rack bridge of pumped storage power station is the structure that connects traffic and trash rack in pumped storage power station.There is no design standard for such bridges in China so far.Most of these bridge designs were performed based on the references on conventional bridge standards as well as experience in the past.However,the trash rack bridge has its particularity compared with the conventional bridge.If it is designed with only reference to conventional bridges,most design parameters are not suitable.Based on the engineering background of the trash rack bridge project of Qingyuan Pumped Storage Power Station in Liaoning Province,as well as combined with the functional requirements and structural characteristics of the trash rack bridge structure of the pumped storage power station,this paper compares and analyzes the design parameters of the trash rack bridge structure with those of the conventional highway bridge from the aspects of the determination of the bridge width,the selection of the design load,the selection of the superstructure and sub-structures and the selection of the ancillary facilities,and gives some suggestions for the reasonable selection of the structural design parameters of the trash rack bridge.At the same time,the calculation theory and design load characteristics of trash rack bridge structure are explained,which can provide reference for the design of trash rack bridge structure.