A hinged prefabricated hollow slab girder bridge hinged joint and its construction method

Abstract

The invention relates to a novel articulated prefabricated hollow slab girder bridge hinge joint connector and a construction method thereof. The hinge joint connector comprises a plurality of prefabricated hollow slab girders; a hinge joint is formed between every two adjacent hollow slab girders; cement paste fills in the hinge joints; a bridge deck pavement layer is poured above the hollow slab girders and the hinge joints; upper transverse reinforcements are embedded in the upper parts of the hollow slab girders; lower transverse reinforcements and reinforcing reinforcements which are located at the upper sides of the lower transverse reinforcements are embedded in the lower parts of the hollow slab girders; the outer ends of the upper transverse reinforcements stretch out of the side faces of the hollow slab girders and are downwards bent to stretch into the hinge joints; the outer ends of the reinforcing reinforcements stretch out of the side faces of the hollow slab girders and are upwards bent to stretch into the hinge joints; the stretching sections of the upper transverse reinforcements and the stretching sections of the reinforcing reinforcements intersect in the hinge joints; the outer ends of the lower transverse reinforcements are upwards bent to stretch out of the top surfaces of the hollow slab girders and stretch into the bridge deck pavement layer above the hinge joints. The novel articulated prefabricated hollow slab girder bridge hinge joint connector and the construction method thereof have the advantage that the shear resisting performance, the anti-cracking performance and the resistance to bending of the hinge joints are improved.

Description

technical field [0001] The invention relates to a hinge joint of a hinged prefabricated hollow slab girder bridge and a construction method thereof, belonging to the technical field of bridges. Background technique [0002] The hinged prefabricated hollow slab girder bridge has the following advantages: (1) simple design; (2) low cost in the life cycle; (3) simple and fast construction; (4) high degree of industrialization. In conclusion, this kind of bridge is widely used because of its high bearing capacity, good durability, attractive appearance and low height-to-span ratio. However, there are still some problems: the hinged concrete cracks and falls off, and in severe cases, it peels off in blocks; at the same time, there is serious water seepage, which may corrode the steel bars of the beam and slab; what's more, the stress on the single plate seriously affects the normal use of the bridge , to reduce the service life; and the current design theory is not perfect, and ...

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Problems solved by technology

However, there are still some problems: the hinged concrete cracks and falls off, and in severe cases, it peels off in blocks; at the same time, there is serious water seepage, which may corrode the steel bars of the beam and slab; what's more, the stress on the single plate seriously affects the normal use of the bridge , reduce the service life; and the current design theory is not perfect enough, the consideration is not yet comprehensive, and the existing problems cannot be solved well

In general articulated prefabricated hollow slab girder bridges, due to the weak horizontal connection, it is easy to form longitudinal reflection cracks between the prefabricated beams visible to the naked eye, which not only affects the appearance, but also forms unfavorable potholes in serious cases, and at the same time, water seeps into the surface of the cracks In concrete, the concrete at the lower part of the hinge joint will peel off, etc., and in severe cases, the hinge joint connection will fail, and the single-slab stress phenomenon that is unfavorable to the structure will appear.

The actual force of the hinged joint is complicated, but in the existing design, not only the tension (compression) of the hinged joint is ignored in the calculation theory of the hinged plate, but also there is a certain difference between the calculation diagram of the hinged joint shear and the actual force. There is actually a certain bending effect in the

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