Large span steel tube arch bridge stents-free hoisting process

Abstract

The invention discloses a large span steel tube arch bridge stents-free hoisting process, the large span steel tube arch bridge is the tied-arch bridge formed above the river and the bridge superstructure comprises arch ribs and a tie bar connected between two arch feet of the arch rib, a stiff skeleton is formed in the tie bar; the stents-free hoisting process for the large span steel tube arch bridge is as follows: 1, assembling the single arch rib with the stiff skeleton of the tie bar on the ground, on the assembling field at the bank side of one side of the river, assembling the arch steel tube stent of the arch rib with the stiff skeleton of the tie bar and obtaining the assembled single piece bridge superstructure; 2, integrally hoisting and positioning the single piece arch rib and the stiff skeleton of the tie bar; adopting floating crane shift platform for hoisting the assembled single piece bridge superstructure and transporting the structure to the bridge lower support structure. The large span steel tube arch bridge stents-free hoisting process is simple in technology process, reasonable in design, convenient in construction and good in construction effect; the large span steel tube arch bridge stents-free hoisting process can be finished simply and quickly, and the hoisting process is safe and reliable.

Description

technical field [0001] The invention belongs to the technical field of bridge construction, and in particular relates to a supportless hoisting process of a large-span steel pipe arch bridge. Background technique [0002] The design level of the Shenzhang Line-Zhangjiagang double track channel is Class III, and the navigable hole requirement is (90×7)m. The intersection angle between the newly-built Gongnong Bridge and the center line of the channel is 90°. If the support cast-in-place scheme is adopted for the construction of the new Gongnong Bridge, (2×25)m navigation holes must be set on the approach channel upstream of the lock. The center of the channel is located at the bend of the Sancha River estuary. During the construction of the bridge, it will inevitably affect the navigation of the channel. At the same time, there is a safety hazard of passing ships colliding with the bracket. [0003] The superstructure of the main bridge of the newly built Gongnong Bridge ado...

AI Technical Summary

Problems solved by technology

However, how to safely and reliably hoist single-piece arch ribs and stiff skeletons in long-span steel pipe arch bridges without greatly affecting river navigation during the construction process currently has few technical materials for reference.

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