Installation and closure construction method for steel sliding roadway arch on top surface of steel trussed beam bridge

Abstract

The invention relates to an installation and closure construction method for a steel sliding roadway arch on the top surface of a steel trussed beam bridge. After two 80t beam erection cranes are used for hoisting a lower suspender of two internodes of a mid span to the mid-span node of the steel trussed beam, vertical and horizontal Bailey beams are immediately installed and oblique pulling equipment is also installed, so as to form a stable frame system; an upper suspender is hoisted and butt jointed with the lower suspender through drift pins and high strength bolts, and the upper suspender is also provided with a Bailey beam connection system and oblique pulling equipment, so as to form a stable structure; arch ribs and arch bracings are installed, after the two arch internodes of the mid span are enclosed, the two beam erection cranes respectively return back an internode, and steel turnbuckles and steel wires are used at intervals circularly as an arch internode after the oblique pulling equipment is erected and the like, until the closure bars of the arch springers are adjusted through abutment pier placement beams to realize arch springer closure. The method has the advantages of simple structure, convenient construction, short construction period, and low cost. The invention provides a simple and practical processing method for above-water and aloft suspender stabilization and closure construction in continuous construction for sliding roadway arches of steel trussed beams.

Description

technical field [0001] The invention relates to the installation and construction method of steel flexible arches on the top surface of steel truss girder bridges, which is suitable for flexible arch construction in water, high altitude, and continuous steel truss girder flexible arch structures, and the connection between suspenders needs to be established When connecting and presetting the closing mouth, the Bailey beam connection system is used to assist the erection of the flexible arch and the arch foot is designed to reserve the closing mouth for one-time closing. It belongs to the technical field of bridge construction. Background technique [0002] In the construction of steel flexible arches on the top surface of steel truss girder bridges, due to the high flexible arches, slender suspenders, heavy arch rib members, and strong wind at high altitudes, it is difficult to build or maintain a stable construction platform. Generally, trusses or steel pipes are used. The...

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Problems solved by technology

[0002] In the construction of steel flexible arches on the top surface of steel truss girder bridges, due to the high flexible arches, slender suspenders, heavy arch rib members, and strong wind at high altitudes, it is difficult to build or maintain a stable construction platform. Generally, trusses or steel pipes are used. The pile is used as the boom connection system and the scaffold is used as the high-bolt screwing platform, and the mid-span arch is reserved for the closure. There are respectively a large amount of steel structure processing and high specification requirements, difficult installation on the top surface of the steel truss girder, and mid-span closure. Problems such as unsupported beam cranes and construction have brought certain difficulties to the construction.

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