T-shaped girder widening and reinforcing structure and construction method thereof

Abstract

The invention discloses a T-shaped girder widening and reinforcing structure and a construction method thereof. The T-shaped girder widening and reinforcing structure comprises two steel box girders and upper steel plates, wherein the steel box girders are arranged on the two sides of a bridge in a transverse direction; the upper steel plates stick to the top surfaces of T-shaped girders of the bridge and are fixed on the two steel box girders; and flanges are arranged on both two sides of the upper parts of the steel box girders in a width direction. Therefore, the T-shaped girder bridge can be widened and reinforced, the passing performance of the bridge is improved, traffic jams are relieved, the transverse integrity of the T-shaped girder bridge is improved, the internal force born on the T-shaped girder is reduced, stress on a single girder is avoided, and the carrying capacity of the whole bridge is improved.

Description

technical field [0001] The invention relates to bridge construction, in particular to a T-beam widening and strengthening structure and a construction method thereof. Background technique [0002] A girder bridge whose load-bearing structure is composed of reinforced concrete flanges and girder ribs is called a T-girder bridge. The compression area of ​​the T-beam section uses pressure-resistant concrete to make the flange plate and doubles as the bridge deck; the tension area uses steel bars or prestressed steel bars to bear the tension. The flexural strength of the T-beam and the rectangular beam is basically the same, but it can save concrete and lighten the components. The self-weight of the bridge improves the spanning ability. At present, with the increase of traffic flow, the existing bridges usually cannot meet the requirements of use, which is easy to cause traffic jams. At the same time, the joints between the T beams are prone to structural defects, making the T ...

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Problems solved by technology

The compression area of ​​the T-beam section uses pressure-resistant concrete to make the flange plate and doubles as the bridge deck; the tension area uses steel bars or prestressed steel bars to bear the tension. The flexural strength of the T-beam and the rectangular beam is basically the same, but it can save concrete and lighten the components. The self-weight of the bridge improves the spanning ability. At present, with the increase of traffic flow, the existing bridges usually cannot meet the requirements of use, which is easy to cause traffic jams. At the same time, the joints between the T beams are prone to structural defects, making the T The bite force between the beams is greatly reduced, and the force transmission effect is greatly reduced. When the joints are completely destroyed, the most unfavorable single-beam stress state occurs, resulting in deflection of the beam body and cracks in the beam ribs, resulting in serious damage to the bridge

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