基于长寿命理念的连续钢桁拱桥设计研究  

Research on Design of Continuous Steel Truss Arch Bridge Based on Long Life Concept

作　　者：闫岩[1] YAN Yan(China Railway First Survey and Design Institute Group Co.Ltd.,Xi’an 710043,China)

机构地区：[1]中铁第一勘察设计院集团有限公司,西安710043

出　　处：《铁道建筑》2023年第3期73-76,共4页Railway Engineering

基　　金：中铁第一勘察设计院集团有限公司科技开发项目(院科18-12)。

摘　　要：以西成铁路(西宁—成都)尖扎黄河特大桥为例,根据钢结构桥梁在运营期维修养护困难的现状,考虑环境保护和可持续发展的要求,对基于长寿命理念的连续钢桁拱桥进行设计研究。结果表明:桥梁采用刚性吊杆可避免运营期频繁更换吊杆,减少了维修养护工作量;桥面采用不锈钢复合正交异形板可延长钢桥面使用寿命,减轻了自重,降低了桥梁工程造价;自主研发了可自动泄压的速度锁定器,大幅降低了构件的制作、建造和维修养护成本,提高了可靠性。Taking the Jianzha Yellow River Grand Bridge on Xining-Chengdu railway as an example,based on the current situation of difficult maintenance and repair of steel structure bridges during the operation period,considering the requirements of environmental protection and sustainable development,the design and research of a continuous steel truss arch bridge based on the concept of long life were conducted.The results show that using rigid suspenders for bridges can avoid frequent replacement of suspenders during operation and reduce the maintenance workload.The use of composite stainless steel orthogonal shaped plates on the bridge deck can extend the service life of the steel bridge deck,reduce the dead weight,and reduce the cost of bridge engineering.This paper has independently developed a speed lock device that can automatically relieve pressure,greatly reducing the cost of component production,construction,and maintenance,and improving reliability.

关 键 词：铁路桥梁 连续钢桁拱桥 长寿命理念 桥梁设计 钢结构 速度锁定器 

分 类 号：U448.13[建筑科学—桥梁与隧道工程] U448.224[交通运输工程—道路与铁道工程]