Beam construction method of bridge-tunnel collaborative construction structure

Abstract

The invention discloses a beam construction method of a bridge-tunnel collaborative building structure, which comprises the following steps of: carrying out slope excavation on a foundation pit, and correspondingly chiseling away a bridge pile head and a tunnel uplift pile head in a tunnel coverage area after excavating to a designed depth of a tunnel bottom plate; a bottom plate, side walls and a middle partition wall of the tunnel are constructed on the upper portions of the bridge piles and the tunnel uplift piles; then, a tunnel top plate reinforcement cage, a river-crossing section beam reinforcement cage and a rib plate reinforcement cage are bound, and a river-crossing section beam and a rib plate type bridge abutment which are integrated with the tunnel top plate are formed through synchronous pouring; bridge pile heads on the two sides of the tunnel coverage area are chiseled away, and a straight wall type bridge abutment is constructed; and a bridge girder is erected above the straight wall type bridge abutment and the rib plate type bridge abutment. The gap bridge section beam has the advantages that the gap bridge section beam can restrain transverse displacement of the rib plate, concentrated loads of the rib plate and the bridge abutment are converted into evenly distributed loads to be transmitted to a tunnel top plate, the overall stability of the rib plate bridge abutment is improved, and meanwhile the stress state of the tunnel top plate is improved.

Description

technical field [0001] The invention belongs to the technical field of bridge construction, and in particular relates to a beam construction method for a bridge-tunnel collaborative construction structure. Background technique [0002] In the construction of urban municipal transportation, road bridges and road tunnels are common construction projects. For the construction of the two across the river, the conventional practice is to cross the river in the form of bridges on the surface roads, and build tunnels on the side of the bridges to form a composite traffic system. This method of separate construction is not only time-consuming and labor-intensive, but also requires pile foundations to be constructed separately in the riverbed, resulting in a waste of building materials and an increase in construction costs. Obviously, the coordinated construction of road bridges and road tunnels will achieve better results. However, there are no relevant bridge-tunnel collaborative ...

AI Technical Summary

Problems solved by technology

This method of separate construction is not only time-consuming and labor-intensive, but also requires pile foundations to be constructed separately in the riverbed, resulting in a waste of building materials and an increase in construction costs. Obviously, the coordinated construction of road bridges and road tunnels will achieve better results. effect, but there are no related bridge-tunnel collaborative construction cases in this field for reference, and those skilled in the art urgently need a construction method for bridge-tunnel collaborative construction

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