复杂山区峡谷特大跨径钢管拱桥施工关键技术研究  

Research on Key Construction Technologies for Large Span Steel Pipe Arch Bridges in Complex Mountain Canyon

作　　者：张靖煊 Zhang Jingxuan(China Railway Chang’an Heavy Industry Co.,Ltd.Xi an 710000)

机构地区：[1]中铁长安重工有限公司,西安710000

出　　处：《建设科技》2024年第1期70-73,共4页Construction Science and Technology

摘　　要：钢管拱最为显著的外在特点是其自重轻、强度较高、跨越能力较大且节省钢材,比较符合我们国家建设的实际需要,而且由于曲线设计姿态优美,受力合理,维修、养护费用少,故长期受到桥梁界的推崇。拱桥以其力学特点,将桥面的竖向荷载转化为部分水平推力,大大降低了主拱的弯矩,拱肋主要承受压力,充分发挥材料抗压性能。当线路跨越山区深谷时,受桥位处地形以及施工场地和运输条件等限制,钢管拱桥以其结构简单,施工方便,可以避免高墩、高塔及与地形协调等诸多优点,成为复杂山区峡谷地带比较理想的桥梁结构形式之一。拱桥历史悠久,钢管拱桥亦是很有竞争力的桥型,但业内对于山区峡谷大跨径钢管拱桥施工技术的研究并不多见。本文以重庆东溪河特大桥施工相关技术研发应用为例,讲述该桥在复杂地质环境下的相关技术突破及成功应用。The most significant external characteristics of steel pipe arches are their light weight,high strength,large span capacity,and economical cost,which are in line with the actual needs of our country’s construction.Moreover,due to their beautiful curve design posture,reasonable stress,and low maintenance and repair costs,steel pipe arches have long been highly praised by the bridge industry.Arch bridges,with their mechanical characteristics,convert the vertical load of the bridge deck into partial horizontal thrust,greatly reducing the bending moment of the main arch,while the arch ribs mainly bear pressure,fully exerting the material’s compressive performance.When the line crosses deep valleys in mountainous areas,due to limitations such as the terrain of the bridge location,construction site,and transportation conditions,steel pipe arch bridges have become one of the ideal bridge beam structures in complex mountainous canyon areas due to their simple structure,convenient construction,and the ability to avoid high piers,towers,and coordination with the terrain.Arch bridges have a long history,and steel pipe arch bridges are also very competitive bridge types.However,there is not much research on the construction technology of large-span steel pipe arch bridges in mountain canyons in the industry.This article takes the development and application of construction technologies for the Dongxi River Bridge in Chongqing City as an example,and describes the relevant technological breakthroughs and successful applications of the bridge in complex geological environments.

关 键 词：复杂山区峡谷 大跨径 钢管拱桥 建模出图 顶弯 

分 类 号：U445.4[建筑科学—桥梁与隧道工程]