Telescopic truss crossbeam and manufacture method thereof

Abstract

The invention provides a telescopic truss crossbeam and a manufacture method thereof. The manufacture method comprises the following steps: a crossbeam upper chord and a crossbeam diagonal web member are prefabricated; T-shaped trolley support rail beams and T-shaped crossbeam support rail beam are assembled and welded; a crossbeam lower chord is formed through the assembly and welding of the T-shaped trolley support rail beams, the T-shaped crossbeam support rail beams and a section of web member at the lower parts of the trolley support rail beams; the crossbeam upper chord and the crossbeam lower chord are placed parallelly, and the crossbeam diagonal web member is obliquely welded between the crossbeam upper chord and the crossbeam lower chord, so that a left lateral plate and a right lateral plate are formed; the left lateral plate and the right lateral plate are erected, and an upper-layer horizontal bracing tube and a lower-layer horizontal bracing tube and a middle inclined bracing tube are welded between the left lateral plate and the right lateral plate; crossbeam upper rails are welded on the crossbeam upper chord, crossbeam lower rails are welded on a lower wing plate of the crossbeam lower chord, and trolley rails are mounted on an upper wing plate of the crossbeam lower chord. According to the method, the sidewise bending and flatness of the crossbeam, the new game start of the rail and the like can be controlled in a precision range.

Description

technical field [0001] The invention relates to a telescopic truss girder and a manufacturing method thereof. Background technique [0002] The conventional quay bridge girder is divided into a front girder and a rear girder. The rear girder and the upper beam are connected by rigid welding. Easier. The telescopic truss girder is composed of I-beams, round pipes, upper and lower chords of the girder, connecting beams on the sea and land sides, and six rails (four of which are welded) as a whole, and there is no distinction between front and rear girders. The entire girder is supported by the suspension device set on the upper beam on the sea and land side, and the driving mechanism is used to make it run in the direction of the sea and land side, so as to effectively reduce the overall height of the quay bridge. This special structure requires special manufacturing technology, so that it can Effectively control the overall straightness of the girder, the opening of the tra...

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Problems solved by technology

[0003] In addition, the upper and lower tracks of the girder are welded with square steel and the supporting rail beam, and the material of the upper track part is WDB620 high-strength steel, and the inside of the track is 20mm groove welding (the total length of a single track is about tens of meters). The weld must have an impact on the straightness of the girder,

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