SU1388502A1 - Portable channel-section block of steel bridge and method of producing same - Google Patents

Abstract

The invention relates to the field of bridge construction and can be used in steel bridge superstructures. The aim of the invention is to reduce the labor intensity of the assembly of the block, increasing the level

Description

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mechanization of welding and improved working conditions. The seamlessly transportable boxblock block of the steel bridge is formed from four large welded elements of full factory readiness; two walls 4, supported by vertical 6 and horizontal 5 stiffening ribs, and two transverse sheets 1, 9, supported by solid lengthwise longitudinal 2, 10 and transverse 3, 11 edges; these elements are joined by various inner and outer corner seams, the inner ones have legs of 6-7 mm and are made by a semi-automatic device in the "in corner" position, as well as by means of linings 12 and bolts, connecting ush, their transverse ribs 11 and 3 of the upper 9 and lower 1 sa with vertical stiffening ribs of 6 walls. The ends of the 13 lower edges of the ca are connected by a lining 14, and from 16 ribs 11 by lining 17 on the bolts. To ensure the immutability of the box shape, transverse diagonal links are applied. A method for manufacturing a fully transportable box-shaped block of a steel bridge consists of manufacturing the walls 4, the top 9 and the bottom 1 supported by the ribs, combining them on the assembly stand by means of linings 12 and bolts with vertical stiffeners 6 of the walls 4; welding with a semiautomatic device in the position “in the corner of inner corner seams, installation of the upper arm and its connection by means of linings 12 and bolts with vertical 6 and horizontal 5 stiffeners of the walls. 4. Then the box-shaped unit is installed in a full-turning jig, where the semi-automatic welding is done in the position of the corner internal corner seams, and then the machine in the position of the four outer corner welds in the boat, then bolted on the diagonal of the 18 cross links and tighten all bolts to the design force. 2 sec. and 2 z. p. f-ly, 6 ill.

one

The invention relates to bridge construction and can be used in steel span structures of rail, road, city, pedestrian and combined bridges.

The purpose of the invention is to reduce the labor intensity of the assembly of the block, increase the level of welding mechanization and improve working conditions.

FIG. 1 shows a cross-section of the whole-transportable box-shaped unit assembled with the walls without beveling; in fig. 2 — node I in FIG. 1 without bevel edge; in fig. 3 - the same, with a bevel of an edge; in fig. 4 - elements of a fully transportable box-like block with walls without bevel edges, prepared under the side; in fig. 5 - the first stage of assembly and welding of a fully transportable box-like block with walls with a bevel edge; in fig. 6 - the same, the second stage.

The seamlessly transported box-shaped block of a steel bridge includes a bottom sheet sheet 1, supported by longitudinal ribs 2 and transverse ribs 3, walls 4 supported by horizontal 5 and vertical 6 ribs, while the walls of blocks of especially important structures have 7 longitudinal edges on the outer sides at an angle 50 ° with a bluntness of 8, equal to 0.7-0.9 times the size of the leg of the inner, perpendicular corner seam, the upper abutment sheet 9, supported by longitudinal ribs 10 and transverse ribs 11, with the transverse ribs 11 of the upper over the leaf and transverse ribs

The 3 lower clear sheets are connected to the vertical stiffening ribs of the 6 walls.

4 through the pads 12 and high-strength bolts and in these bolted joints, the ends of the 13 transverse ribs of the lower webs and the adjacent ends of the 14 vertical stiffeners of the walls are cut off at an angle of 40-50 ° to the horizon, and the ends of the ribs are blunt and form in the inner corners a box section of a window 15 with a size in all directions of not less than 120 mm; The lower along with 16 transverse edge 11 of the upper elastic sheet 9 is connected by overlays 17 on high-strength bolts to a horizontal edge 5 of the wall, and the diagonal 18 cross-links are attached by high-strength bolts to vertical stiffeners 6 of the walls 4.

The welded elements of the all-transportable box-like block — the walls, the upper and the lower strip sheets (FIG. 4) —are made separately on stands for assembling and welding orthotropic plates. At the same time, the stiffening ribs of the walls and the longitudinal edges of the perforated sheets can have flat, T-shaped and other sections. The transverse ribs of the transverse sheets, as a rule, have a T-section.

The sequence of operations for assembling and welding of the whole-transportable box-shaped unit (Fig. 5 and 6) is as follows.

On the assembly stand, the bottom strip sheet 1 (bottom in c) is welded with welded longitudinal and transverse ribs. Then, two walls 4 are installed and their vertical stiffening ribs b are joined with the transverse ribs 3 of the lower one due to the elimination of manual welding and the safety of work production, to improve the working conditions of the workers.

Claims (4)

1. A seamlessly transportable box-shaped block of a steel bridge, comprising two walls, supported by a set of horizontal and vertical stiffeners, the upper and ca 1 by means of linings 12 and high-low draper sheets, supported by solid bolts. Semi-automatic welded longitudinal and transverse “in the corner are performed with two internal ribs, and welded to the walls of the inner corner of the seam with the leg 6–7 mm, with external and external corner angles. The upper belt is installed (upper - mi shvami, characterized in that, for the purpose of a research institute according to c) 9, the transverse ribs 11 of which 15 reduce the labor intensity of the assembly of the unit, increase the level of welding mechanization and improve working conditions, the transverse ribs of the lower full sheet are made of a single trapezoidal shape with cutouts in the lower cha ty and are connected to vertical using the pads 12 and high-strength bolts are connected to the vertical ribs 6 and with the help of the pads 17 and high-strength bolts to horizontal ribs 5 of the walls 4. The assembled box-shaped unit installs the 20 stiffening ribs of the walls by pressing into the lower half of the full-turning conductor - tilting device, after which it is installed its upper half and turning the tilting device in this way. laying and bolts, with vertical ribs of walls and transverse edges of the upper and lower webs arranged in the same plane forming the walls of the block alternately 25 in the inner corners of the box at an angle of 40-50 ° to the horizon when welding blocks with walls without bevel edges and at an angle of 20-30 ° to the horizon when welding blocks with walls that have bevel edges. Automatic welding alternately subtracts the windows, and internal corner seams have legs 2-3 times smaller than external ones. 2. The unit according to claim 1, characterized in that its walls on the outer sides have two longitudinal external winding 30 full bevel longitudinal edges with blunting a seam connecting the bottom strip sheet to the walls. The construction of the block is rotated 180 °, i.e. to the position when the upper one is at the bottom, and by semi-automatic welding, two followings are performed in the corner, equal to 0.7-0.9 times the inner corner of the leg of the corner. 3. A method of manufacturing a whole-transversal box-shaped block of a steel bridge, including the manufacture of reinforced them internal longitudinal angular with-35 edges of the walls, the upper and lower ones the box-shaped unit, assembly and welding by internal and external longitudinal seams of the walls and holes in the box-shaped unit in a full-turning conductor, installation of the diagonals of the transverse connections, without beveling the edges and at an angle of 20, characterized in that, in order to reduce 30 ° to the horizon when welding blocks from the wall, the laboriousness of the assembly of the block, increase the level of welding mechanization and improve working conditions, assemble the bottom panel and walls, weld them longitudinally internal diagonal stitched seams of high strength bolts, the installation and connection of pepper links 18 to the vertical edges of the upper belt are made on the rigidity 6 of wall 4, after which the final horizontal assembly stand in on nopovorotny conductor. 4. The method according to p. 3, characterized in that the transportable box-shaped block and its method that welding external longitudinal strip assemblies makes it possible to reduce the labor intensity of the seams in a full-turn conductor of industrial production, to increase the damage when the walls of the block are positioned under the level of welding mechanization processes around an angle of 20-30 ° to the horizontal plane. seam with leg 6-7 mm. The last two outer circumferential seams are alternately performed by automatic welding when the block is positioned at an angle of 40-50 ° to the horizon when welding blocks with walls that have a bevel edge. Install and attach all bolts to the design force and tighten them. The proposed design provides an end to the elimination of manual welding and the safety of work, to improve the working conditions of workers. Invention Formula laying and bolts, with vertical ribs of walls and transverse ribs of the upper and lower lateral sheets located in the same plane form in the inner corners of the box-shaped gray The windows are inside, and the inner corner seams have legs, 2-3 times smaller than the outer ones. 2. The unit according to claim 1, characterized in that its walls on the outer sides have longitudinal bevels with blunting width equal to 0.7-0.9 size of the leg of the inner corner of the seam. 3. A method of manufacturing a whole-transversal box-shaped block of a steel bridge, including the manufacture of reinforced Fig2 one Ich four FIG. If Fi8.3 0 // 17 P  F 13 i) one ABmot am. welding W rig.5 H