铁路十字形连续梁跨路施工的特点与优势分析

ANALYSIS OF CHARACTERISTICS AND ADVANTAGES OF RAILWAY CROSS CONTINUOUS BEAM CONSTRUCTION

在铁路施工中,主要以简支箱梁制、运、架施工为主,跨路、跨河时多采用一联三跨连续梁施工,而斜拉桥、悬索桥、拱桥等结构比较特殊,受力结构复杂,施工难度较大,造价过高,较为少见。通过对简支箱梁、一般连续梁、门式墩盖梁结构、十字形连续梁等梁式桥结构适用条件进行对比分析,以新建莱荣铁路1标桃林村特大桥(32+32)m十字形连续梁为例,分析了十字形连续梁跨路施工的特点及优势,为今后同类型设计与施工提供有价值的参考。

The construction,transportation,and erection of simply supported box girder form most of the railway construction.When crossing roads or rivers,it is common to use continuous beam with one connection and three spans.On the other hand,cable-stayed bridges,suspension bridges,arch bridges and other structures have complex force structures,great construction difficulty,and high cost,and they are relatively rare.This paper compares and analyzes the applicable conditions of beam bridge structures including simply supported box girder,general continuous girder,gate pier capping beam structure,and cross continuous beam structure.By taking the(32+32)m cross continuous beam of Taolin Village Grand Bridge in the first section of the newly built Lairong Railway as an example,this paper analyzes the characteristics and advantages of cross continuous beam construction across the road,providing valuable reference for the design and construction of the same type in the future.