Drag-reduction guiding unloading device and pushing method for pushing and constructing combined bridge

Abstract

The invention discloses a drag-reduction guiding unloading device and pushing method for pushing and constructing a combined bridge. An upper sliding support piece with an adjustable height is arranged on a lower support assembly, and the lower support assembly is fixed to a steel girder in use; the face, opposite to the side face of a rib of a concrete bridge-road plate, of the drag-reduction guiding unloading device is provided with a guiding face for providing guidance in a rolling fraction mode when the concrete bridge-road plate is pushed, and the upper sliding support piece is used for supporting wing plates of the concrete bridge-road plate in a rolling fraction mode when in use. Through the adoption of the drag-reduction guiding unloading device and pushing method for pushing and constructing the combined bridgen, the contact and sliding fraction between the bridge-road plate and the steel girder is converted into rolling fraction, and the forward resistance to pushing of the concrete bridge-road plate is obviously reduced; the transverse position of the slab rib of the concrete bridge-road plate is restrained by the lower support assembly through the guiding face, so that it is guaranteed that transverse guidance is provided for push forwarding of the concrete bridge-road plate on the steel girder along a set trajectory; by adjusting the height of the upper sliding support piece, the gravity, supported by the device, of the concrete bridge-road plate can be conveniently unloaded and transferred to the top face of the steel girder.

Description

technical field [0001] The invention belongs to the field of bridge engineering equipment, and in particular relates to a drag-reducing guiding unloading device and a pushing method for building a steel-concrete composite bridge by pushing. Background technique [0002] The common construction method of the existing prefabricated steel-concrete composite girder bridge is hoisting the steel girder to put it in place on the pier, hoisting the prefabricated concrete bridge slab to put it in place on the steel girder, and re-casting combined concrete to form a steel-concrete composite girder bridge. [0003] The "Segmental Continuous Prefabrication—Steel-Concrete Composite Beam Bridge and Its Construction Method" (Invention Patent Application No.: 201611148449.8) filed by the inventor in the previous period is much better than the construction of conventional fabricated steel-concrete composite girder bridges. It avoids the trouble of large-scale transportation, hoisting and cas...

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Problems solved by technology

[0003] The "Segmental Continuous Prefabrication—Steel-Concrete Composite Beam Bridge and Its Construction Method" (Invention Patent Application No.: 201611148449.8) filed by the inventor in the previous period is much better than the construction of conventional fabricated steel-concrete composite girder bridges. It avoids the trouble of large-scale transportation, hoisting and cast-in-place combined concrete construction, but there is a problem of segmental continuous precast concrete bridge slabs being pushed into place on steel beams for a long distance. The usual method is to contact the concrete bridge slabs with steel beams The interface is equipped with gaskets to reduce sliding friction, but in the case of long-distance pushing into place, there must be excessive sliding friction, and it is difficult to restrain the lateral offset, and it is not easy to remove the concrete bridge slab after it is in place on the top surface of the steel beam to reduce friction Three major problems of the resistance gasket

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