Steel-concrete combined beam bridge deck slab

Abstract

The invention discloses a steel-concrete combined beam bridge deck slab. The steel-concrete combined beam bridge deck slab comprises concrete and a steel bottom plate, and the concrete is poured on the steel bottom plate; and the steel-concrete combined beam bridge deck slab further comprises transverse trepanning stiffening plates arranged at intervals and longitudinal prestressed plates arrangedat intervals, the transverse trepanning stiffening plates are installed on the upper surface of the bottom plate, and the longitudinal prestressed plates penetrate through the transverse trepanning stiffening plates. According to the steel-concrete combined beam bridge deck slab, the problem that an original steel-concrete combined slab structure is prone to cracking due to the fact that the original steel-concrete combined slab structure lacks transverse-longitudinal two-way effective constraint is solved through the internal transverse trepanning stiffening plates and the longitudinal prestressed plates penetrating through the transverse trepanning stiffening plates; the weak connection problem of the steel-concrete structure is solved through the internal transverse trepanning stiffening plates; and the problems that an open structure is hard to meet the torsional rigidity requirements of the flat bent structure construction stage, and the overall open structure is low in transverse cutting rigidity and weak in hoisting capability are solved through the internal transverse trepanning stiffening plates and the steel bottom plate.

Description

technical field [0001] The invention belongs to the construction field of steel-concrete composite continuous girder bridges for roads and urban roads, and in particular relates to a novel steel-concrete composite girder deck structure. Background technique [0002] Highway and urban road curve overpass is affected by the traffic of the road under the bridge or the height of the structural building, so it is not suitable to erect supports for cast-in-place concrete beam construction. When choosing a steel box girder structure with no supports or sparse supports as the main girder, the bridge deck pavement The quality is difficult to guarantee, so the steel-concrete composite continuous girder bridge with concrete deck has become the main form of this type of structure. [0003] Traditional steel-concrete composite girder continuous girder bridges are generally hoisted in place with open steel boxes, and are connected with ordinary reinforced concrete decks by shear nails. Th...

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Problems solved by technology

[0004] 1. After the steel box is hoisted in place, it faces the problem of pouring the concrete bridge deck. If the ground support is erected, the advantage of the steel box girder without support will be lost. If the bracket attached to the steel box is used to carry out the flange slab concrete Pouring, there is still the problem that materials are scattered during the pouring process and affect the traffic safety under the bridge. Some overpasses span expressways and urban arterial roads, and the speed of vehicles under the bridge is too fast. If the control is not good, it will easily cause huge losses or even disasters.

[0005] 2. The concrete structure has a high compressive capacity, but lacks sufficient tensile bearing capacity. The bearing capacity is provided by configuring a sufficient amount of ordinary steel bars, but the function of the steel bars is bound to be accompanied by cracking of the concrete. This part of the concrete may work with cracks for a long time, affecting structural durability

[0006] 3. Traditional steel-concrete composite girder continuous girder bridges are generally hoisted by open steel boxes. The torsional rigidity of the bridge deck is low before pouring and installation, which cannot meet the design and construction requirements of highways and urban bridges with small flat curve radii.

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