Expressway hollow slab girder longitudinal splicing structure and method

Abstract

The invention aims at providing an expressway hollow slab girder longitudinal splicing structure and method. The expressway hollow slab girder longitudinal splicing structure comprises an old bridge hollow slab girder, a new bridge hollow slab girder, multiple self-tapping bolts, multiple pieces of embedded connection rebar, concrete pre-pavement layers, reinforcing meshes, concrete wet connectionconnectors and hollow pipes; the middles of the old bridge hollow slab girder and the new bridge hollow slab girder are provided with filling gaps, the multiple self-tapping bolts are connected withone side end of the old bridge hollow slab girder, the multiple pieces of the embedded connection rebar are arranged at one side end of the new bridge hollow slab girder and are welded to tails of theself-tapping bolts in a one-to-one correspondence mode, the concrete pre-pavement layers are arranged on the outer side of the upper end of the old bridge hollow bridge and the outer side of the upper end of the new bridge hollow slab girder, the reinforcing meshes are arranged in a pavement space formed between the two concrete pre-pavement layers, the two side ends of the reinforcing meshes areconnected with fixed rebar groups of the two concrete pre-pavement layers in a one-to-one corresponding mode, the concrete wet connection connectors are poured into the pavement space and the fillinggaps, and multiple pairs of hollow pipes are arranged in the longitudinal direction and penetrate into the concrete wet connection connectors. The expressway hollow slab girder longitudinal splicingstructure is stable in longitudinal seam splicing quality.

Description

technical field [0001] The invention relates to the field of road construction, in particular to a longitudinal splicing structure and splicing method of hollow slab girders of an expressway. Background technique [0002] With the rapid development of national traffic, expressway traffic congestion, expressway widening is gradually increasing, bridge longitudinal splicing is the key part of widening project construction quality control, the original longitudinal splicing process "new and old hollow beams and slabs of expressway widening bridge engineering under the state of traffic" Splicing construction method "GGG (Zhejiang) C3071-2008 adopts the method of planting bars to connect the old and new bridges. Since the welding of steel bars affects the anchoring force of planting bars, and the amount of planting bars is difficult to control, it is easy to cause longitudinal joints. Resulting in unstable splicing quality. In order to overcome the problem of connecting the old ...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the problem of connecting old and new bridges by planting bars at present. Since the welding of steel bars affects the anchoring force of the bar-planting glue, and the amount of bar-planting glue is also difficult to control, there is a problem that the splicing quality of the longitudinal seam is likely to be unstable. Insufficient, to provide a longitudinal splicing structure and splicing method of expressway hollow slab girder with stable longitudinal seam splicing quality

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