Eccentric arrangement method and device for turntable on curved steel truss girder

Abstract

The invention discloses an eccentric arrangement method and device for a turntable on a curved steel truss girder, and the method comprises the steps: arranging a spherical hinge assembly at a pier top at a preset transverse eccentric distance away from the center line of the steel truss girder; arranging a steel box girder at the upper part of the spherical hinge assembly; arranging a space inclined supporting rod on the upper portion of the steel box girder, and supporting the steel truss girder on the upper portion of the space inclined supporting rod; and with the center line of the spherical hinge assembly as the center line of the swivel, rotating the pier top of the steel truss girder. The problem that the rotary table is difficult to arrange on the beam bottom of the steel truss beam is solved, and safe and effective transmission of loads is achieved.

Description

technical field [0001] The invention relates to the technical field of bridge swivels, in particular to an eccentric arrangement method and device for a turntable on a curved steel truss girder. Background technique [0002] The swivel method construction refers to a construction method in which the bridge structure is manufactured (cast or spliced) at a position other than the design axis, and then swiveled into place. When the beam part is on the flat curve, there is a certain lateral eccentricity between the center of gravity of the swivel beam section and the geometric center at the top of the pier. [0003] Generally speaking, steel truss girders can only transmit loads through member nodes, which are controlled by factors such as internode length and main truss spacing. It cannot coincide with the node of the bar; due to the influence of factors such as the lateral eccentricity and the lateral asymmetry of the position of the node on the horizontal curve, most of the ...

AI Technical Summary

Problems solved by technology

[0003] Generally speaking, steel truss girders can only transmit loads through member nodes, which are controlled by factors such as internode length and main truss spacing. It cannot coincide with the node of the bar; due to factors such as the lateral eccentricity and the lateral asymmetry of the position of the node on the flat curve, most of the support leg layout cannot coincide with the node of the bar

This series of contradictions makes the layout of the upper turntable difficult, and limits the construction of curved steel truss girders by the pier top rotation method.

Therefore, at present, most of the beams using the pier top swivel technology are concrete beams, and no steel truss beams have been constructed using the pier top swivel method.

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