Road cold-bent U-shaped composite beam bridge and construction method thereof

Abstract

The invention discloses a road cold-bent U-shaped composite beam bridge and a construction method thereof. The road cold-bent U-shaped composite beam bridge is structurally characterized in that a plurality of U-shaped steel plates are spliced into a bridge body steel structure; and concrete pouring areas are arranged on the U-shaped steel plates, an asphalt layer is laid on concrete, a gantry isarranged at the bridge head, and guardrails and lamp posts are arranged on the two sides of the bridge. Compared with the prior art, the U-shaped steel plates are formed in a cold-bending mode and donot need to be welded, and thus the welding quality problem and welding residual stress are avoided; steel beam segments spliced in a factory are transported to a site, and then the concrete is pouredto form the bridge; the steel beam segments replace construction formworks, the construction technology is optimized, the construction quality is improved, and the construction period is shortened; and the bearing capacity of cold-bent U-shaped composite beams is three times that of equal-span hollow slab beams, the concrete cracking disease can be reduced, and bridge durability is improved.

Description

technical field [0001] The invention relates to a bridge structure, in particular to a U-shaped composite girder bridge, a structure of a lamp post and a guardrail and a manufacturing method thereof, and belongs to the technical field of bridge structures. Background technique [0002] Traditional hollow slab girders use a large amount of concrete, and the concrete segments are self-heavy. It is inconvenient to hoist and transport in areas with inconvenient traffic, and the concrete slab girders are easily damaged during transportation and hoisting. In the past, during the service period of concrete hollow slab girders, the increase of overloaded and overweight vehicles and the long-term temperature effect and shrinkage and creep tended to cause cracking of the slab girder, which endangered the durability and safety of the main body of the bridge. In addition, the number of concrete cracks is large and widely distributed, the detection, repair and reinforcement techniques ar...

AI Technical Summary

Problems solved by technology

[0002] The traditional hollow slab girders use a large amount of concrete, and the concrete segments are self-heavy. It is inconvenient to hoist and transport in areas with inconvenient traffic, and the concrete slab girders are easily damaged during transportation and hoisting.

In the past, during the service period of concrete hollow slab girders, the increase of overloaded and overweight vehicles and the long-term temperature effect and shrinkage and creep tended to cause cracking of the slab girder, which endangered the durability and safety of the main body of the bridge.

In addition, the number of concrete cracks is large and widely distributed, the detection, repair and reinforcement technology is difficult, and the later maintenance costs are high, which affects the economic performance of the bridge in its entire life.

[0003] Traditional hollow slab bridge guardrails are mostly made of wood and steel structures. The durability of the wood structure is poor, and it is prone to insects and weathering corrosion; the paint on the outside of the painted steel structure is easy to fall off due to the friction of pedestrians or vehicles, and the exposed steel bars leak in the air. , prone to rust

This kind of guardrail affects the safety and comfort of driving, and the later maintenance is inconvenient and the maintenance cost is high

Aiming at the problems of traditional hollow slab girders, such as self-heaviness, many cracking diseases, and poor durability of guardrails, a cold-formed U-shaped composite girder bridge is proposed to solve the problem.

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