Stretch-draw forming composite structure arch bridge and building method thereof

Abstract

The invention provides a stretch-draw forming composite structure arch bridge and a building method thereof. The arch bridge comprises at least two lower strings (2), at least two upper strings (4), a set of flying shores (5), a set of web members (1) and a set of beams (3), wherein the lower strings (2) are straight and parallel to each other, the upper strings (4) upwards arch and are parallel to each other, the flying shores (5) are transversely connected between the two adjacent upper strings, the web members (1) are connected between the upper strings and the lower strings of the same sides, the beams (3) are connected between the two adjacent lower strings; a plane bridge floor system is jointly constituted by the lower strings and the beams, each lower string is formed by splicing a set of lower string pipes (2b) penetrating on a lower string steel cable (2a) in sequence, and the adjacent lower string pipes are connected through flange bolts; and each upper string is formed by welding upper string pipes (4a) in sequence, the bottoms of the two ends of the spliced upper string pipes are welded to the two ends of the spliced lower string pipes correspondingly, and the spliced lower string pipes and upper string pipes are grouted with micro-expansive mortar or concrete. According to the stretch-draw forming composite structure arch bridge and the building method thereof, the construction forming state and the operating loading state can be integrated into a whole in arch bridge building, and construction is rapid, easy and economic.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and in particular relates to a tension-formed composite arch bridge structure and a construction method thereof. Background technique [0002] In the 1930s, prestressed concrete and high-strength steel appeared one after another, and major progress was made in the research of material plasticity theory and limit theory, bridge vibration research, aerodynamic research, and soil mechanics research, making arch bridge technology It has achieved rapid development, especially the prestressed steel structure or composite structure arch bridge, such as: steel arch bridge, reinforced concrete arch bridge, steel pipe concrete arch bridge, steel concrete arch bridge and so on. At present, the main construction methods of arch bridges include bracket method, cable hoisting method, swivel method, cantilever assembly method and so on. [0003] The bracket method usually erects a full hall bracket o...

AI Technical Summary

Problems solved by technology

Its disadvantages are: there are many arch rib joints, the welding workload is large, and the construction period is long; the requirements for the terrain and foundation under the bridge are relatively high, and the foundation settlement, elastic and non-elastic deformation of the support should be calculated in advance; High, large amount of support, prone to instability and collapse

However, the construction period of this method is relatively long

Images