Prefabricated combined corrugated steel web T girder bridge

Abstract

The invention discloses a prefabricated combined corrugated steel web T girder bridge which comprises a reinforced concrete top plate and longitudinal beams arranged under the reinforced concrete top plate, wherein the reinforced concrete top plate is formed in the manner of splicing a plurality of bar-shaped plates in equal width with a girder bridge deck; mutually matched splicing slots are formed on the splicing surfaces of two adjacent bar-shaped plates; inserting holes corresponding to the positions of the longitudinal beams are formed on the bar-shaped plates; the longitudinal beams are arranged as a set of corrugated steel webs which are welded with top edge steel plates and bottom edge steel plates; connecting bolts are welded on the top edge steel plates; the connecting bolts are penetrated through the inserting holes and are integrally fixed with the bar-shaped plates in the manner of concreting; a plurality of horizontal steel separating plates which are arrayed along the longitudinal direction of the bridge are welded between the corrugated steel webs at intervals. A method for combining the prefabricating with the on-site assembling is adopted in a construction process. Thus, the prefabricated combined corrugated steel web T girder bridge provided by the invention has the advantages of simple structure, convenience in construction, low maintenance cost and capability of greatly increasing construction efficiency and service life.

Description

technical field [0001] The invention relates to the technical field of road and bridge construction, in particular to a prefabricated combined corrugated steel web T-beam bridge. Background technique [0002] T-girder bridge with corrugated steel web is a new type of steel-concrete composite structure bridge. Generally, a number of T-shaped assembly units composed of reinforced concrete roof and corrugated steel web longitudinal beam are prefabricated in the prefabrication yard, and then the T is assembled on site. The single-span girder body that meets the bridge width requirements is formed by horizontal splicing of the type assembly units, and then the adjacent span girder bodies are assembled vertically to complete the construction of the entire T-beam bridge. Because corrugated steel web T-girder bridge adopts two materials of corrugated steel plate and concrete, which combines the advantages of high compressive strength of concrete and high shear strength of corrugated...

AI Technical Summary

Problems solved by technology

[0004] 1. Wet joints are generally narrow, and the construction space is small. Binding the steel bars at the wet joints is time-consuming and labor-intensive. The bottom edge of the wet joints of the roof needs to support the formwork, and the on-site construction is difficult;

[0005] 2. There is a difference in the pouring age of the concrete at the joint between the wet joint and the prefabricated beam, resulting in different shrinkage and creep of the old and new concrete, which is likely to cause cracks at the interface between the post-cast concrete and the prefabricated part, thereby affecting the use of the bridge The structural force of the stage bridge;

[0006] 3. With the increasing traffic flow, when the existing bridges are facing overload conditions, the wet joints are more likely to be damaged, and the veneer is stressed, which affects the bearing capacity of the bridge and is detrimental to the safety of the structure, greatly shortening service life of the bridge

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