CN212793489U

CN212793489U - Composite cushion block for butt joint of U-shaped rib embedding sections

Info

Publication number: CN212793489U
Application number: CN202021752418.5U
Authority: CN
Inventors: 冯辉; 吴江波; 刘志刚; 李彦国; 杜伟
Original assignee: China Railway Baoji Bridge Group Co Ltd; China Railway Baoji Bridge Yangzhou Co Ltd
Current assignee: China Railway Baoji Bridge Group Co Ltd; China Railway Baoji Bridge Yangzhou Co Ltd
Priority date: 2020-08-20
Filing date: 2020-08-20
Publication date: 2021-03-26
Anticipated expiration: 2030-08-20

Abstract

The utility model relates to an in U type rib insertion section butt joint in-process, for realizing that insertion section and U rib full penetration welding provide the U type rib insertion section butt joint of technical means with compound cushion, glass fiber cloth is wrapped up in at red copper backing block outer wall, and the panel is located port on the red copper backing block, has U rib and U rib insertion section on the glass fiber cloth. The advantages are that: firstly, the welding of the bridge position embedding section is realized by adopting the composite cushion block, the fatigue problem of steel liner welding is avoided, the integral connection quality of the orthotropic bridge deck is improved, and meanwhile, compared with bolt connection, the efficiency is high and the cost is low; the used glass fiber cloth is an alkaline material and is directly contacted with a weld pool, so that the burning loss of the red copper cushion block is avoided, the red copper cushion block can be recycled, and the cost is reduced; and the red copper liner has good ductility, is convenient to bend and form, has good heat-conducting property, improves the cooling speed of the welding line to a great extent, and is favorable for forming the upward welding line.

Description

Composite cushion block for butt joint of U-shaped rib embedding sections

Technical Field

The utility model relates to an in U type rib insertion section butt joint in-process, for realizing that insertion section and U rib fully-penetration weld provide the U type rib insertion section butt joint of technical means with compound cushion block to reach and to increase the longitudinal continuous atress ability of U rib, can solve again the tired difficult problem of welding insertion section, can raise the efficiency again simultaneously, shorten bridge site erection cycle, reduce cost.

Background

At present, in the process of erecting a steel beam bridge, U ribs between beam sections are connected by adopting a bolting or welding method. The welding connection is that an embedding section is arranged between two beam sections, a permanent steel liner is welded on the back surface of the U rib in advance during in-site manufacture, and the U rib connection is realized by adopting a single-side welding and double-side forming process. Because the limitation of the existing bending process is difficult to ensure zero-gap fitting of the steel liner and the U rib, the gap with different sizes which locally exists can directly influence the quality of the root part of the welding seam, and the fatigue resistance of the whole welding seam is greatly reduced. In the service process of the steel bridge, the orthotropic bridge deck is easily subjected to fatigue cracks on the back of the steel liner at the connecting part under the action of staggered loads, and is difficult to maintain and reinforce. The bolt connection is that bolt holes are drilled at the end parts of the U ribs, and the U ribs are bolted by using the splice plates, so that the method has high requirements on the processing precision of the members, the friction surfaces need special protection, the cost is higher, meanwhile, the bolt connection needs to be provided with holes, the strength of the cross section is weakened, and stress concentration can be caused; the line shape and the manufacturing tolerance in the field are adjusted in the erection process, the gap between the beam sections is difficult to accurately control, and the prior bridge manufacturing unit adopts the process of drilling a half-hole group of the splice plate on the field, so that the workload of the bridge position is greatly increased, the period is long, and the cost is high. When a longitudinal and transverse beam system is used as a bridge surface of a railway bridge, the U ribs are often exposed and not sealed, and if the embedded sections are connected by high bolts, the U rib embedded sections are delayed to break and have driving safety, so that the U rib embedded section welding is the trend of U rib connection of orthotropic bridge panels of steel bridges.

Disclosure of Invention

The design purpose is as follows: the defects in the background technology are avoided, and the composite cushion block for butt joint of the U-shaped rib embedding section is designed to provide a technical means for realizing full penetration welding of the embedding section and the U rib in the butt joint process of the U-shaped rib embedding section.

The design scheme is as follows: in recent years, steel bridge construction has been developed in a leap-type manner, orthotropic steel bridge deck plates have the advantages of light weight (thin plates and small steel consumption) and high bearing capacity, orthotropic steel bridge deck plates are adopted for bridge deck plates of large steel bridges, and U-shaped ribs are mainly adopted as stiffening ribs for the orthotropic steel bridge deck plates. However, due to the limitation of the bending process, zero-gap fitting between the steel liner and the U-shaped rib is difficult to ensure, and the quality of the root of the welding seam is directly influenced by the gaps with different sizes which are locally formed, so that the fatigue resistance of the whole welding seam is greatly reduced. The utility model discloses to this a difficult problem, at the different welding position of bridge position U rib embedment section, use novel compound impermanent cushion, realize the welded connection of bridge position embedment section, accomplish embedment section welded connection, adopt the two-sided forming technology of single-side welding between embedment section and the U rib, the back cushion is the compound cushion of glass fiber cloth + red copper cushion. This scheme can realize the full penetration welding of benefit section and U rib, increases the vertical continuous atress ability of U rib, solves the tired problem of welding benefit section, raises the efficiency simultaneously, shortens bridge site and erects cycle, reduce cost.

The technical scheme is as follows: the utility model provides a be used for butt joint of U type rib to inlay and mend section and use compound cushion, glass fiber cloth wraps up in the red copper backing block outer wall, and the panel is located red copper backing block upper port, has U rib and U rib to inlay and mend the section on the glass fiber cloth.

Compared with the background art, the utility model, firstly, adopt the compound cushion to realize the welding of the bridge position embedding section, avoid the fatigue problem of steel liner welding, improve the whole connection quality of the orthotropic decking, compare the bolt connection at the same time, it is efficient, low cost; the used glass fiber cloth is an alkaline material and is directly contacted with a weld pool, so that the burning loss of the red copper cushion block is avoided, the red copper cushion block can be recycled, and the cost is reduced; and the red copper liner has good ductility, is convenient to bend and form, has good heat-conducting property, improves the cooling speed of the welding line to a great extent, and is favorable for forming the upward welding line.

Drawings

FIG. 1 shows the welding groove processing intention of the red copper pad.

Fig. 2 is a schematic diagram of the red copper pad before bending.

Fig. 3 is a schematic view of the red copper pad after bending.

FIG. 4 is a schematic view of the U-rib insertion section before bending, hand hole machining and groove machining.

FIG. 5 is a schematic diagram of the U-rib insertion section after bending, hand hole machining and groove machining.

Fig. 6 is a schematic view of the structure of the portion C-C in fig. 4.

FIG. 7 is a schematic view of the assembly of the composite spacer.

Fig. 8 is a schematic view of the structure of portion a-a in fig. 7.

Fig. 9 is a schematic view of the portion B-B in fig. 7.

Detailed Description

Example 1: reference is made to fig. 1-9. The utility model provides a be used for butt joint of U type rib to inlay and use compound cushion, glass fiber cloth 1 wraps up in 2 outer walls of red copper backing block, and panel 3 is located red copper backing block upper port, has U rib 4 and U rib to inlay and mend section 5 on the glass fiber cloth 1. The width of the welding groove of the red copper pad is 10-12 mm, and the depth is 0.5-1 mm. The length of the embedded section of the U rib is 500mm, and the middle of the embedded section is provided with a size of 80mmx200 mm; the angle of the groove on the two long sides of the processing embedding section is 30-35 degrees. The thickness of the composite cushion block is 8-12 mm, the width is 28-32 mm, the length is 750-800 mm, and the length can be changed according to the size of the U-shaped rib of each steel bridge.

The welding method of the U-shaped rib embedding section by using the composite cushion block comprises the following steps: (1) processing the red copper cushion block: a red copper cushion block is prepared in the processing, the thickness of the cushion block is 10mm, the width of the cushion block is 30mm, and the length of the cushion block is 737 mm. The red copper cushion block welding groove is machined by a machining method, the width is 10-12 mm, and the depth is 0.5-1 mm (see figure 1). After the groove of the red copper pad is processed, the red copper pad block is bent according to the size of the U-shaped rib (see fig. 2-3); (2) manufacturing a U-rib embedding section: the length of the embedding section is 500mm, and grooves of two long sides of the embedding section are machined, wherein the angle of the groove is 30-35 degrees; bending the embedding section according to the design drawing requirement; forming a hand hole in the middle of the embedding section by a profiling flame cutting machine, wherein the size of the hand hole is 80mmx200 mm; (3) assembling bridge position embedding sections: and adjusting the gap between the embedded section and the weld joints of the U ribs on the two sides to be 6-10 mm, welding the embedded section and the weld joints of the panel, wherein the welding material is a common flux-cored wire. (4) Assembling the composite cushion block: the glass fiber cloth is flatly paved on the back of the welding seam of the embedding section through the hand hole of the embedding section, the central line of the cushion block is aligned with the center of the welding seam, and then the red copper cushion block is placed above the glass fiber cloth and is fixed on the back of the welding seam by adopting a simple magnetic attraction device (see figures 7-9). (5) And welding the embedded section welding seam by adopting flux-cored wire gas shielded welding, wherein the welding current is 190-200A, the voltage is 22-24V, the overhead welding speed is 300-350 mm/min, and the vertical welding speed is 130-150 mm/min. Welding from the middle to two sides, polishing a transition slope of 1:5 at the position of a welding joint, converting from a bottom position to a vertical position in the welding process, and not allowing arc interruption at the corner of a welding seam of the embedding section. (6) After the welding is completed, the glass fiber cloth is completely burnt, and the red copper cushion block is taken out (recycled). And (4) polishing the weld joint and the corner of the weld uniformly to complete the welding of the butt weld of the embedding section.

It should be noted that: the methods mentioned in this application are merely illustrative of the application of the present invention and do not fall within the scope of the claims of the present invention. And will not be described in great detail.

It is to be understood that: although above-mentioned embodiment is right the utility model discloses a design has done more detailed word description, but these word descriptions, are only right the utility model relates to a simple word description of idea, rather than right the utility model relates to a restriction of idea, any do not surpass the utility model relates to a combination, increase or the modification of idea all fall into the utility model discloses a within the protection scope.

Claims

1. The utility model provides a be used for butt joint of U type rib insertion section to use compound cushion, characterized by: glass fiber cloth (1) wraps up in red copper cushion (2) outer wall, and panel (3) are located red copper cushion upper end mouth, have U rib (4) and U rib on glass fiber cloth (1) and inlay section (5).

2. The composite cushion block for butt joint of the U-shaped rib embedding sections as claimed in claim 1, wherein: the width of the welding groove of the red copper pad is 10-12 mm, and the depth is 0.5-1 mm.

3. The composite cushion block for butt joint of the U-shaped rib embedding sections as claimed in claim 1, wherein: the length of the embedded section of the U rib is 500mm, and the middle of the embedded section is provided with a size of 80mmx200 mm; the angle of the groove on the two long sides of the processing embedding section is 30-35 degrees.

4. The composite cushion block for butt joint of the U-shaped rib embedding sections as claimed in claim 1, wherein: the thickness of the composite cushion block is 8-12 mm, the width of the composite cushion block is 28-32 mm, and the length of the composite cushion block is 750-800 mm.