A highway cold-formed U-shaped composite girder bridge and its construction method

Abstract

The invention discloses a highway cold-formed U-shaped composite girder bridge and a construction method thereof. Structurally, a plurality of U-shaped steel plates are spliced ​​into a bridge main steel structure; the U-shaped steel plate is a concrete pouring area, an asphalt layer is laid on the concrete, and the bridge head is arranged Gate frame, guardrails and lamp posts on both sides of the bridge. Compared with the prior art, the U-shaped steel plate of the present invention does not require welding for cold-bending forming, which avoids welding quality problems and welding residual stress; the spliced ​​steel girder segments in the factory are transported to the site, and then concrete is poured to form a bridge. The steel beam segments replace the construction formwork, optimize the construction process, improve the construction quality and shorten the construction period. The flexural bearing capacity of the cold-formed U-shaped composite beam is three times that of the hollow slab beam with the same span, and it can reduce concrete cracking diseases and enhance the durability of the bridge.

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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