CN116967721A - A processing and manufacturing technology for trapezoidal bent torsion arch bridge box beams - Google Patents

Abstract

The invention relates to a processing and manufacturing process of a trapezoidal bending arch bridge box girder, which is characterized in that: the specific manufacturing process is as follows: s1: machining parts; s2: positioning a top plate; s3: the partition board and the T-shaped flange plate are installed; s4: mounting a support in the box girder; s5: installing a bottom plate; s6: installing a web plate; s7: mounting a leveling plate; s8: welding a lifting lug plate; the trapezoid bending arch bridge box girder is produced and processed by adopting a reverse building method, and in the processing process of the trapezoid bending arch bridge box girder, an internal baffle plate structure and an internal box girder support are firstly installed on a top plate; then mounting bottom plate and web form holistic trapezoidal curved arch bridge case roof beam, have improved the machining efficiency of curved arch bridge case roof beam, and under the circumstances of guaranteeing the bearing capacity of this product, this structure overall rigidity is big, and wind-resistant shock resistance is good, especially in being arranged in the arch bridge structure, can effectively avoid the problem that the arch bridge rigidity of large-span is not enough, and this trapezoidal curved arch bridge case roof beam's processing technology is succinct, is fit for using widely.

Description

A processing and manufacturing technology for trapezoidal bent torsion arch bridge box beams

Technical field

The invention relates to the technical field of bridge steel box girder processing, and in particular to a trapezoidal bending and torsion arch bridge box girder processing and manufacturing technology.

Background technique

The general trapezoidal torsion arch bridge box girder structure is mainly used in the construction of steel box arch bridges. This trapezoidal torsion arch bridge box girder has mobile bending. Therefore, during the construction process, extra attention is required to the arch bridge box girder. Processing accuracy and welding strength to avoid the problem of large internal stress in trapezoidal box beams.

Contents of the invention

The technical problem to be solved by the present invention is to provide a trapezoidal bending and torsion arch bridge box girder processing and manufacturing technology, which can solve the problems of generally using trapezoidal steel box girder to build arch bridges. The trapezoidal steel box girder construction process is complicated and the welding effect is poor.

In order to solve the above technical problems, the technical solution of the present invention is: a trapezoidal curved torsion arch bridge box girder processing and manufacturing process. The trapezoidal curved torsion arch bridge box girder includes a top plate, a bottom plate, a web, a rib and a partition; a top plate, a bottom plate, a web The plates surround a trapezoidal structure; the ribs are welded to the inner wall of the trapezoidal structure, and the partitions are parallel to the cross-section of the trapezoidal structure and are set inside the trapezoidal structure; the innovation is: the specific manufacturing process is as follows: the trapezoidal bending and torsion arch bridge box girder adopts the counter-fabrication method processing;

S1: Processing of parts: Cut the top plate, bottom plate, web plate, partition plate and rib plate according to the shape on the cutting machine; make holes on the partition plate and weld the reinforcement ring; assemble and weld the T-row flange plates;

S2: Roof plate positioning: lay the roof plate on the tire frame, and weld the ribs on the upper surface of the roof along the extending direction; the ribs are fully penetrated and welded, and the root is removed;

S3: Installation of partitions and T-row flange plates: Weld the partitions and T-row flange plates alternately on the middle stiffening rib plate on the top plate;

S4: Installation of the inner supports of the box girder: weld the inner supports of the box girder at the middle position of the top plate. The inner supports of the box girder include support partitions and support ribs, and the support partitions are vertically connected to several support ribs. A Feng-shaped structure is formed on the board; then the reinforcement plates of the support ribs are welded on both sides of the support ribs;

S5: Installation of the bottom plate; lay the bottom plate on the tire frame, and weld the ribs along the extending direction on the upper surface of the bottom plate; the ribs are fully penetration welded, using root cleaning; then turn the bottom plate over and fasten it to the box beam The top of the inner support, and the inner surface of the bottom plate and the support rib of the inner support of the box girder are root welded;

S6: Installation of the web: Weld the web to the edge of the partition from both sides. The welding of the web and the T-row flange plate is done by opening a single-sided groove on the T-row flange plate; the box girder is internally supported. The floor groove on the web corresponding to the seat faces the bottom plate;

S7: Installation of the leveling plate: Weld the upper leveling plate on the surface of the bottom plate at the position of the inner support of the box beam, and penetration welding is used between the leveling plate and the surface of the bottom plate;

S8: Lifting lug plate welding: After completing the welding and installation of the leveling plate, turn over the entire trapezoidal torsion arch bridge box girder, and weld the lifting lug plate on the top plate.

Further, when the thickness of the web is 20-30mm, and the thickness of the top plate and bottom plate is both 30mm, a t/3 shallow penetration groove with a penetration depth of 50 degrees is made on the inside of the trapezoidal structure, and a 2t groove is made on the outside of the trapezoidal structure. /3 Bevel with a penetration depth of 40 degrees.

Furthermore, in the above-mentioned S8, the welds of the lifting lug plates are all full-penetration welds and adopt the form of root cleaning.

Furthermore, the upper support ribs and the bottom plate of the inner support of the S4 middle box girder were root-cleared and welded, leaving a 2mm deep weld with the support partition.

The advantages of the present invention are:

1) In the present invention, the trapezoidal curved torsion arch bridge box girder is produced and processed by using the inverse method. During the processing of the trapezoidal curved torsion arch bridge box girder, the internal partition structure is first installed on the top plate and the inner supports of the box girder are installed; and then The bottom plate and web are installed to form an integral trapezoidal bending and torsion arch bridge box girder, which improves the processing efficiency of the bending and torsion arch bridge box girder. Moreover, while ensuring the bearing capacity of the product, the overall structure has high stiffness and good wind and earthquake resistance, especially When used in arch bridge structures, it can effectively avoid the problem of insufficient stiffness of large-span arch bridges. The processing technology of this trapezoidal torsion arch bridge box girder is simple and suitable for promotion and use.

Description of the drawings

The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

Figure 1 is a flow chart of the processing and manufacturing process of a trapezoidal bent torsion arch bridge box beam according to the present invention.

Figures 2 to 6 are state diagrams of the processing and production of a box girder of a trapezoidal bent torsion arch bridge according to the present invention.

Implementation

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, rather than all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

Therefore, the following detailed description of the embodiments of the invention provided in the appended drawings is not intended to limit the scope of the claimed invention, but rather to represent selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present invention.

As shown in Figures 1 to 6, a trapezoidal curved torsion arch bridge box girder processing and manufacturing process is shown. The trapezoidal curved torsion arch bridge box girder includes a top plate, a bottom plate, a web, a rib and a partition; the top plate, bottom plate and web form a trapezoid. Structure; the ribs are welded to the inner wall of the trapezoidal structure, and the partitions are arranged in the trapezoidal structure parallel to the cross-section of the trapezoidal structure; the specific manufacturing process is as follows: the box beams of the trapezoidal bent-torsion arch bridge are processed by the inverse method;

S1: Processing of parts: Cut the top plate, bottom plate, web plate, partition plate and rib plate according to the shape on the cutting machine; make holes on the partition plate and weld the reinforcement ring; assemble and weld the T-row flange plates;

S2: Roof plate positioning: lay the roof plate on the tire frame, and weld the ribs on the upper surface of the roof along the extending direction; the ribs are fully penetrated and welded, and the root is removed;

S3: Installation of partitions and T-row flange plates: Weld the partitions and T-row flange plates alternately on the middle stiffening rib plate on the top plate;

S4: Installation of the inner supports of the box girder: weld the inner supports of the box girder at the middle position of the top plate. The inner supports of the box girder include support partitions and support ribs, and the support partitions are vertically connected to several support ribs. A Feng-shaped structure is formed on the board; then the reinforcement plates of the support ribs are welded on both sides of the support ribs;

S5: Installation of the bottom plate; lay the bottom plate on the tire frame, and weld the ribs along the extending direction on the upper surface of the bottom plate; the ribs are fully penetration welded, using root cleaning; then turn the bottom plate over and fasten it to the box beam The top of the inner support, and the inner surface of the bottom plate and the support rib of the inner support of the box girder are root welded;

S6: Installation of the web: Weld the web to the edge of the partition from both sides. The welding of the web and the T-row flange plate is done by opening a single-sided groove on the T-row flange plate; the box girder is internally supported. The floor groove on the web corresponding to the seat faces the bottom plate;

S7: Installation of the leveling plate: Weld the upper leveling plate on the surface of the bottom plate at the position of the inner support of the box beam, and penetration welding is used between the leveling plate and the surface of the bottom plate;

S8: Lifting lug plate welding: After completing the welding and installation of the leveling plate, turn over the entire trapezoidal torsion arch bridge box girder, and weld the lifting lug plate on the top plate.

When the thickness of the web is 20-30mm, and the thickness of the top plate and bottom plate is both 30mm, the trapezoidal structure has a t/3 shallow melt depth groove of 50 degrees on the inside, and a 2t/3 melt depth groove is made on the outside of the trapezoidal structure. Deep 40 degree bevel.

In S8, the welds of the lifting lug plates are all full-penetration welds and adopt the root-clearing method.

The upper support ribs and the bottom plate of the inner support of the S4 middle box girder are welded with root clearance, and the penetration depth of the weld with the support partition plate is 2mm.

The working principle of the present invention is as follows: by using the inverse method to produce and process the trapezoidal curved and torsion arch bridge box beams, during the processing of the trapezoidal curved and torsion arch bridge box beams, the internal partition structure and the inner supports of the box beams are first installed on the top plate. ; Then install the bottom plate and web to form an integral trapezoidal bending and torsion arch bridge box girder, which improves the processing efficiency of the bending and torsion arch bridge box girder. Moreover, while ensuring the bearing capacity of the product, the overall structure has high stiffness and good wind and earthquake resistance. , especially when used in arch bridge structures, it can effectively avoid the problem of insufficient stiffness of large-span arch bridges. The processing technology of the trapezoidal torsion arch bridge box girder is simple and suitable for promotion and use.

Those skilled in the industry should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have other aspects. Various changes and modifications are possible, which fall within the scope of the claimed invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims (4)

1. A processing and manufacturing process for a trapezoidal curved torsion arch bridge box girder. The trapezoidal curved torsion arch bridge box girder includes a top plate, a bottom plate, a web, a rib and a partition; the top plate, the bottom plate and the web form a trapezoidal structure; the ribs are welded to the trapezoid On the inner wall of the structure, the partition is arranged parallel to the cross-section of the trapezoidal structure; it is characterized by: the specific manufacturing process is as follows: the trapezoidal bending and torsion arch bridge box beam is processed by the counter-fabrication method; S1: Processing of parts: Cut the top plate, bottom plate, web plate, partition plate and rib plate according to the shape on the cutting machine; make holes on the partition plate and weld the reinforcement ring; assemble and weld the T-row flange plates; S2: Roof plate positioning: lay the roof plate on the tire frame, and weld the ribs on the upper surface of the roof along the extending direction; the ribs are fully penetrated and welded, and the root is removed; S3: Installation of partitions and T-row flange plates: Weld the partitions and T-row flange plates alternately on the middle stiffening rib plate on the top plate; S4: Installation of the inner supports of the box girder: weld the inner supports of the box girder at the middle position of the top plate. The inner supports of the box girder include support partitions and support ribs, and the support partitions are vertically connected to several support ribs. A Feng-shaped structure is formed on the board; then the reinforcement plates of the support ribs are welded on both sides of the support ribs; S5: Installation of the bottom plate; lay the bottom plate on the tire frame, and weld the ribs along the extending direction on the upper surface of the bottom plate; the ribs are fully penetration welded, using root cleaning; then turn the bottom plate over and fasten it to the box beam The top of the inner support, and the inner surface of the bottom plate and the support rib of the inner support of the box girder are root welded; S6: Installation of the web: Weld the web to the edge of the partition from both sides. The welding of the web and the T-row flange plate is done by opening a single-sided groove on the T-row flange plate; the box girder is internally supported. The floor groove on the web corresponding to the seat faces the bottom plate; S7: Installation of the leveling plate: Weld the upper leveling plate on the surface of the bottom plate at the position of the inner support of the box beam, and penetration welding is used between the leveling plate and the surface of the bottom plate; S8: Lifting lug plate welding: After completing the welding and installation of the leveling plate, turn over the entire trapezoidal torsion arch bridge box girder, and weld the lifting lug plate on the top plate. 2. A trapezoidal bending and torsion arch bridge box beam processing and manufacturing process according to claim 1, characterized in that: when the thickness of the web is 20-30mm, and the thickness of the top plate and the bottom plate are both 30mm; the trapezoidal structure is on the inner side A t/3 shallow penetration groove with a penetration depth of 50 degrees is made, and a 2t/3 groove with a penetration depth of 40 degrees is made on the outside of the trapezoidal structure. 3. A trapezoidal bending and torsion arch bridge box girder processing and manufacturing process according to claim 1, characterized in that: in the S8, the lifting lug plate welds are all full penetration welds and adopt the form of root cleaning. 4. A trapezoidal bending and torsion arch bridge box beam processing and manufacturing process according to claim 1, characterized in that: the support ribs and bottom plates on the inner supports of the S4 middle box beams are root welded and separated from the supports. The penetration depth of the plate weld is 2mm.