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

A technology for steel truss girder bridges and roofs, which is applied in bridges, bridge construction, erection/assembly of bridges, etc., can solve the problems of difficult construction, high specification requirements, and difficult construction of construction platforms, and achieve the effect of great promotion value.

Active Publication Date: 2009-06-03
THE 2ND ENG CO LTD MBEC
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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 use...
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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.

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

Examples

  • Experimental program(1)

Example Embodiment

[0014] The present invention includes the following process steps:
[0015] (1) After the steel truss girder is closed, adjust the centerline position of the steel girder and the elevation of each support. At the same time, the arch girder is pre-assembled, and then transported to the wharf with a flatbed truck, hoisted on the barge by the wharf crane, and transported by water to erection specific area.
[0016] (2) Two 80t girder cranes simultaneously lift the lower boom from the barge and install it on the mid-span node of the steel truss girder. The vertical and horizontal Bailey beams will be installed immediately, and the diagonal pulling equipment will be installed.
[0017] (3) Lift the upper section of the boom and connect it with the lower section of the boom through punching nails and high bolts. Similarly, install the Bailey beam connection system and the oblique pulling equipment on the upper section of the boom, and install the arch rib and arch flat connection after stabilization.
[0018] (4) After the two arch sections in the middle of the span are closed, the beam erecting crane moves back one section, erects the next arch section, and so on, until the last arch section.
[0019] (5) According to the size of the space of the arch-foot closure, determine the top and bottom of the lifting beam at the edge of the steel truss beam. According to the simulated actual working conditions, the ratio between the top drop value of the steel beam and the space displacement change value of the closure is calculated, and the required closure displacement change value is determined according to the measurement to implement the top drop operation until the member and the node plate hole Right, hit the red nail.
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