南水北调中线铁路框架桥设计安全储备对比  

Safety reserve of railway frame bridge design in Middle Route Project of South-to-North Water Transfer Project

作　　者：管巧艳[1,2] 袁振霞[3] 杜晖 王耀飞 

机构地区：[1]郑州航空工业管理学院土木建筑工程学院,河南郑州450000 [2]航空经济发展河南省协同创新中心,河南郑州450000 [3]中原工学院,河南郑州450007 [4]河南省水利勘测设计研究有限公司,河南郑州450016

出　　处：《河南城建学院学报》2016年第5期7-11,共5页Journal of Henan University of Urban Construction

基　　金：国家科技支撑计划课题(2015BAB07B07)

摘　　要：南水北调中线工程铁路框架桥上层过火车,下层过水。为保证工程安全,需同时满足铁路和水利两个行业设计规范,铁路现行规范采用容许应力法,水利现行规范采用极限状态设计法。以中铝企业站铁路框架桥为研究对象,采用铁路和水利两种规范计算,针对设计标准、钢筋应力、混凝土压应力、裂缝宽度、配筋率等方面进行分析对比。结果表明:铁路规范配筋率大于水利规范配筋率,铁路规范裂缝宽度小于水利规范裂缝宽度,铁路规范容许应力法安全储备大于水利规范极限状态设计法。The railway frame bridge in the Middle Route Project of South-to-North Water Transfer Project,on the upper level of the railway frame bridge runs the train,and under it the river flows. In order to ensure the safety of the project,we need to meet both the design specifications of railway and water conservancy. The allowable stress method is adopted in the current standard of the railway,and the limit state design method is adopted in the current standard of water conservancy. Taking the railway frame bridge of Zhonglü station as the research object,using two kinds of standard calculation of railway and water conservancy,the analysis and comparison are made according to the design standard,the stress of steel bar,concrete compressive stress,crack width,reinforcement ratio and so on. The results show that the reinforcement ratio is greater than the Railway Standard Specification reinforcement ratio,and the crack width is less than the railway standard specification of crack width,the railway standard allowable stress safety specification is greater than the limit state design method.

关 键 词：容许应力法 极限状态设计法 配筋率 安全储备 南水北调中线工程 

分 类 号：U24[交通运输工程—道路与铁道工程]