A steel arch rib and a concrete base connecting device

Abstract

The invention relates to a steel arch rib and a concrete base connecting device, comprising a three-way prestressed concrete arch rib force transmission section which is poured and fixed on the concrete base, and an end face of the three-way prestressed concrete arch rib force transmission section is connected with the steel arch rib through a full-cell steel concrete connection section; The concrete base comprises a pile foundation and a pile cap foundation poured on the pile foundation, and an arch base is poured on the pile cap foundation; The three-way prestressed concrete arch rib force transmission section comprises concrete arch ribs poured and fixed on the arch base, and the concrete arch ribs are respectively connected with the concrete base from the inside through transverse prestressed steel bars and vertical prestressed steel bars. The full-cell steel-concrete connection section connects the end face of the concrete arch rib and the steel arch rib through a plurality of longitudinal prestressed steel strands running through the full-cell steel-concrete connection section. The invention greatly improves the overall compression capacity of the joint section, and can realize the close connection between the steel arch rib and the concrete base.

Description

technical field [0001] The invention relates to the field of arch bridge construction, in particular to a connection device between a steel arch rib and a concrete base. Background technique [0002] At present, two forms are usually used for the connection between the steel arch rib and the concrete base. One is to embed the steel arch rib in the concrete base and weld the anchor reinforcement on the steel arch rib to bear the bending moment. Pulling force, the end of the steel arch rib is welded to the end plate, and the reinforcement mesh is set in the concrete near the end to reduce the pressure concentration; the other is to set a concrete cap at the connection between the pile item and the arch section, and the cap is divided into two After the first pouring is completed, the lower end of the first pouring is at a certain height. After the arch ring is fully formed, the remaining height of concrete at the upper end is poured to complete the consolidation. Embedded stee...

AI Technical Summary

Problems solved by technology

The rear pressure plate structure of the built-in steel box relies on the rear pressure plate to bear the axial force, and the perforated steel plate bears the axial force and shear force. The internal force concentration of the combined surface of this form is small, but the concrete at the bottom of the steel box is difficult to pour and the compactness is difficult to guarantee

The flange-type butt joint structure relies on the pressure-bearing steel plate to bear the axial force, and the weld and bolts bear the shear force. This form is convenient and quick to construct, but the stress on the joint surface is relatively concentrated, and the axial force and shear force are limited.

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