Shear part of spiral spring bolt and construction method

Abstract

The invention discloses a shear part of a spiral spring bolt and a construction method. The shear part comprises an elastic sleeve, an elastic nut, a screw rod and a nut, the elastic sleeve is connected to the screw rod and the elastic nut in a sleeving mode, one end of the elastic nut abuts against the top of the elastic sleeve, the other end of the elastic nut abuts against one end of the screw rod, the other end of the screw rod is in threaded connection with the nut, the end, abutting against the elastic nut, of the screw rod is conical, the elastic sleeve comprises an elastic steel plate, and the elastic steel plate is wound around a rod body of the screw rod by at least three circles. The nut is tightened to apply pre-tightening force, the elastic sleeve can be extruded through the screw rod, due to the fact that the elastic sleeve has elasticity, when the elastic sleeve has an expansion effect, the elastic sleeve is not damaged, the screw rod interacts between the nut and the elastic nut, and the elastic sleeve and a concrete block can generate an anchoring effect, so that the friction force between the shear part and the steel-concrete interface is increased, and the friction force between a bridge deck and a steel beam is increased.

Description

technical field [0001] The invention relates to the technical field of combined connection between components in buildings, in particular to a shear member of a helical spring bolt and a construction method. Background technique [0002] With the development of cities, the traffic volume of highway bridges continues to increase, and the bearing capacity of existing bridges can no longer meet the increasing load-bearing requirements. In order to reinforce bridges with insufficient bearing capacity or damaged bridges, or to design and build bridge structures with higher bearing capacity that can meet the requirements of prefabricated construction, prefabricated steel-concrete composite girder bridges have emerged as the times require. [0003] Composite bridge structures create composite effects by connecting concrete slabs to steel beams to increase the load-carrying capacity of the structure. Among them, the shear connection between the concrete slab and the steel beam is t...

AI Technical Summary

Problems solved by technology

[0004] The combination of concrete slabs and steel beams can be achieved through many different types of shear connectors. At present, bonded shear stud shear connectors, helical spring bolt shear connectors and fastening bolt shear connectors are more common. The following problems exist in the above-mentioned connectors: 1. The vertical anchoring effect is only produced by the mechanical friction between the hole in the concrete slab and the screw thread and the bonding effect of the adhesive, and the pull-out resistance is weak; 2. The helical spring bolt is a flexible shear bolt. 3. Grouting is carried out at the connection, and the concrete in the hole needs to be chiseled out when the connection is removed, and the construction efficiency is low

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