Bridge widening structure adopting corrugated steel sheet connecting parts and construction method thereof

Abstract

The invention relates to a bridge widening structure adopting corrugated steel sheet connecting parts and a construction method thereof. The bridge widening structure comprises a new bridge, an old bridge and a joint crack. The old bridge and the new bridge are transversely connected through the joint crack. The corrugated steel sheet connecting parts for connecting an edge beam flange plate of the old bridge and an edge beam flange plate of the new bridge are arranged in the joint crack. The corrugated steel sheet connecting parts comprise vertically-arranged corrugated steel sheets and bolts. The corrugated steel sheets are arranged between the edge beam flange plate of the old bridge and the edge beam flange plate of the new bridge and connected with the edge beam flange plate of the old bridge and the edge beam flange plate of the new bridge respectively through the bolts. Long-strip-shaped holes allowing the bolts to penetrate are formed in the straight sheet sections on the two sides of the corrugated steel sheets, and the bolts are friction type high strength bolts. According to the bridge widening structure, it can be guaranteed that longitudinal deformation of a main beam of the new bridge is not restrained by a main beam of the old bridge, transverse bridge direction bending deformation generated by the new bridge and the old bridge obtained after widening is reduced, shear failure of an old bridge support is avoided, and the use performance of the widened bridges is guaranteed; the construction period is shortened, and good economic benefits are achieved.

Description

[0001] Technical field: [0002] The invention relates to a bridge-width structure using corrugated steel plate connectors and a construction method thereof. [0003] Background technique: [0004] In recent years, with the rapid development of my country's economy, my country's transportation industry has made great progress. However, due to the increasingly frequent movement of people and goods, the demand for transportation has surged. In order to meet the demand of increasing traffic volume, there are currently two main solutions: one is to build new lines; the other is to widen and rebuild existing lines. Due to the high cost of building new lines, long construction period, and blocking traffic, it is urgent to renovate and expand these roads, and increase the traffic capacity from the original four-lane width to six-lane or eight-lane. Bridges account for a large proportion of modern highways. In addition, bridge widening has the characteristics of complex technology, h...

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Problems solved by technology

[0008] However, when the splicing method ③ is used to splice the main girders of the new and old bridges, the old bridge has been in operation for a long period of time, and the concrete shrinkage and creep deformation of the main girders have been completed and tended to be stable. Under the effect of concrete shrinkage, especially under the action of concrete shrinkage, the main girder of the new bridge will shrink and deform in the longitudinal bridge direction; The constraints of the beam, under the action of the difference in shrinkage and creep of the new and old concrete, lead to the bending deformation of the overall structure in the direction of the bridge after widening, and the maximum value appears at the position of the abutment or a transitional pier

Since the bearings used in the bridges built in the early stage are usually ordinary plate-type rubber bearings, their deformation capacity is small, which will lead to excessive displacement in the cross-bridge direction of the old bridge bearings after the new and old bridges are widened, resulting in shear failure and affecting The normal use of such bridges

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