高速铁路大跨度钢桁拱梁架设技术及经济分析

Technological and Economic Analysis of Erection of the Large Span Steel Trussed Arch Girder

南京大胜关长江大桥以其设计时速高、设计荷载重、主桥跨度大三大特点跻身于世界同类型高速铁路桥先进水平之列。此文阐述其六跨连续钢桁拱梁架设方案和施工新工艺,并就预拼存放场、提升站、下河码头、临时支墩、墩旁托架、三层吊索塔架等大型临时设施的施工设计和工程指标进行研究。同时还就当前铁路工程预算定额尚属空白的大跨度钢桁拱梁部分进行探讨。

The Nanjing Dashengguan Changjiang River Bridge ascends the advanced level of high speed railway bridgesby its designed high speed,heavy load,and large span of the main bridge.This paper describes the erection scheme and new construction technologies of the six-span continuous steel trussed arch girder,and studies the construction design and engineering indicators of such large temporary facilities as the storage yard for the pre assemblage,the lift station,the ramp wharf,temporary piers,the pier-side supporting structure,and the three layer wire rope tower crane.Meanwhile,this paper discusses the quota on the large span steel trussed arch girder which has not been covered by the current quota system of the railway construction estimate.