Reinforcing structure for demolition construction of platform bridge crossing existing line platform

Abstract

The utility model relates to a reinforcing structure for demolition construction of a platform bridge crossing an existing line platform, which comprises a reinforcing strip base arranged between two primary side upright posts of the platform bridge along the rail direction; the embedded welding plates are embedded at the two ends of the surface of the reinforcing strip base at intervals; the steel pipe stand column is welded on the embedded welding plate; the short column foundation wraps and fixes the steel pipe stand columns arranged side by side at one end of the reinforcing strip foundation; the cross bridging is fixedly connected between the steel pipe stand columns at the two ends of the reinforcing strip base; the double-spliced I-shaped steel distribution beams are arranged on the steel pipe stand columns; the lower end of the stand column outer inclined strut is fixed to the lower end of the steel pipe stand column, the upper end of the stand column outer inclined strut extends to the bottom face of an overbridge primary side beam supported by the overbridge primary side stand column and is fixed, and the lower end of the stand column outer inclined strut is also wrapped and fixed by the short column foundation. Reinforcing measures can be taken before the platform bridge is dismantled, the scheme of firstly reinforcing and then dismantling is adopted, old station building transformation is facilitated, construction across existing lines is facilitated, and it is guaranteed that the existing lines are operated without interruption.

Description

Technical Field

[0001] The utility model relates to the field of demolition construction of platform bridges across existing lines, in particular to a reinforcement structure used for demolition construction of platform bridges across existing lines. Background Art

[0002] In the renovation projects of old stations, the demolition of existing overpasses and the construction of new elevated layers often occur. When the column foundations of the new elevated layer are close to the column foundations of the existing overpass, the construction of the new elevated layer column pedestals may have a certain impact on the foundation of the overpass due to reasons such as earth excavation, which may easily cause the overturning of the original columns of the overpass and also lead to the operation of the existing line, resulting in serious consequences such as suspension of service. Utility Model Content

[0003] The technical problem to be solved by the present invention is to provide a reinforcement structure for the demolition construction of a platform bridge across an existing line, which is conducive to reinforcement measures before the bridge is demolished. The solution of reinforcement first and demolition later is adopted, which is conducive to the renovation of old station buildings, facilitates construction across the existing line, and ensures that the existing line does not stop operating.

[0004] In order to solve the above problems, a reinforcement structure for the demolition of the platform bridge across the existing line was adopted, which includes:

[0005] The reinforced strip foundation is set along the track between the two original side columns of the overpass;

[0006] Embedded welded plates are embedded at intervals at both ends of the surface of the reinforcement strip base;

[0007] Steel pipe columns, which are welded to the embedded welding plates;

[0008] Short column foundation, which covers and fixes the steel pipe columns arranged side by side at one end of the reinforced strip foundation;

[0009] Scissor braces, which are fixed between the steel pipe columns at both ends of the reinforced strip foundation;

[0010] Double-jointed I-beam distribution beams are set on top of steel pipe columns;

[0011] The outer diagonal brace of the column has its lower end fixed on the lower end of the steel pipe column, and its upper end extends to and is fixed on the bottom surface of the original side beam of the overpass supported by the original side column of the overpass. The lower end of the outer diagonal brace of the column is also covered and fixed by the short column foundation.

[0012] By adopting such a structure, a reinforcement strip foundation is added between the two original side columns of the overpass, and then the steel pipe columns are supported by the reinforcement strip foundation. The original side beams of the overpass are supported by introducing external diagonal braces on the columns to support the original side beams of the overpass, so as to facilitate the removal of the original side columns of the overpass and provide space for the slope construction of the new elevated layer columns.

[0013] A second stiffening plate is added between the upper end of the outer diagonal brace of the column and the bottom surface of the original side beam of the overpass; vertical struts are added between the upper and lower chords of the overpass to further ensure the stability of the overpass during the demolition construction process.

[0014] As a further improvement of the present invention, pull-out anchor rods are provided on the reinforcement strip foundation; the pull-out anchor rods are located on both sides of the short column foundation and extend into the ground.

[0015] With this structure, the pull-out anchor rods make the reinforced strip foundation more stable;

[0016] As a further improvement of the present invention, a first stiffening plate is welded between the embedded welding plate and the lower end of the steel pipe column.

[0017] Adopting such a structure is beneficial to strengthening the connection between the embedded welding plate and the steel pipe column.

[0018] As a further improvement of the present invention, the embedded welding plate is provided with holes at intervals for the embedded steel bars to penetrate and be welded and fixed, and the lower ends of the embedded steel bars are made into hooks and embedded in the reinforcement strip base.

[0019] Such a structure facilitates a tighter connection between the embedded welding plate and the reinforcement strip base.

[0020] As a further improvement of the present invention, the I-beam welded in the middle of the embedded welded plate is embedded in the reinforcement strip base.

[0021] With this structure, the welded I-beams further strengthen the connection between the welded plate and the reinforcement strip base.

[0022] As a further improvement of the present invention, the middle portion of the outer diagonal brace of the column is fixed to the upper end of the steel pipe column by a diagonal brace.

[0023] Such a structure is used to strengthen the connection between the outer diagonal brace of the column and the steel pipe column.

[0024] As a further improvement of the present invention, a semicircular ring-shaped counterweight is added on the basis of the short column, and the semicircular ring-shaped counterweight is adapted to the surface of the steel pipe column.

[0025] With such a structure, the semicircular ring counterweight is convenient for adjusting the center of gravity of the overall structure, balancing the center of gravity of the strip foundation, and preventing overturning. The counterweight is made of concrete and has a low cost.

[0026] As a further improvement of the present invention, positioning steel bars are pre-embedded on the short column foundation, and corresponding positioning holes are provided on the bottom surface of the semicircular ring counterweight.

[0027] With such a structure, the positioning steel bars prevent the semicircular ring counterweight from slipping or falling during installation.

[0028] As a further improvement of the present invention, a positioning short column is set on the semicircular ring counterweight, and the positioning short column is adapted to the positioning hole.

[0029] With such a structure, the semicircular ring-shaped counterweights can be prevented from slipping when stacked up and down.

[0030] As a further improvement of the present invention, a handle is provided on one side of the counterweight.

[0031] With this result, the handle is easy to assemble the counterweight.

[0032] The utility model is convenient for carrying out reinforcement measures before demolition of the overpass, and adopts a scheme of reinforcing first and then demolishing, which is beneficial to the renovation of old station buildings, facilitates construction across existing lines, and ensures that the existing lines are not interrupted in operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 Schematic diagram of the structure of the embodiment.

[0034] Figure 2 A top view diagram of the reinforced strip foundation.

[0035] Figure 3 Schematic diagram of the structure of the pull-out anchor.

[0036] Figure 4 This is a schematic diagram of the vertical section of the reinforced strip foundation.

[0037] Figure 5 This is a schematic diagram of the semicircular counterweight installation structure.

[0038] Figure markings: 1. Reinforced strip foundation; 2. Original side column; 3. Embedded welded plate; 4. Steel pipe column; 5. Short column foundation; 6. Scissors brace; 7. Double-piece I-beam distribution beam; 8. External diagonal brace of column; 9. Original side beam of overpass; 10. Handle; 11. Pull-out anchor rod; 12. First stiffening plate; 13. Perforation; 14. Embedded steel bar; 15. I-beam; 16. Diagonal brace; 17. Semicircular counterweight; 18. Positioning steel bar; 19. Positioning hole; 20. New pedestal; 21. Positioning short column. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] Example 1

[0041] like Figure 1-Figure 5 As shown, a reinforcement structure for demolition construction of a platform overpass across an existing line comprises:

[0042] The reinforcement strip foundation 1 is arranged along the track between the two original side columns 2 of the overpass;

[0043] Embedded welding plates 3 are embedded at intervals at both ends of the surface of the reinforcement strip base 1;

[0044] Steel pipe columns 4, which are welded to the embedded welding plates 3;

[0045] The short column foundation 5 covers and fixes the steel pipe columns 4 arranged side by side at one end of the reinforcement strip foundation 1;

[0046] Scissor braces 6, which are fixed between the steel pipe columns 4 at both ends of the reinforcement strip base 1;

[0047] Double-jointed I-beam distribution beam 7, which is arranged on the steel pipe column 4;

[0048] The outer diagonal brace 8 of the column is fixed at the lower end of the steel pipe column 4, and its upper end extends to the bottom surface of the original side beam 9 of the overpass supported by the original side column 2 of the overpass and is fixed. The lower end of the outer diagonal brace 8 of the column is also covered and fixed by the short column foundation 5.

[0049] By adopting such a structure, a reinforcement strip foundation 1 is added between the two original side columns 2 of the overpass, and then a steel pipe column 4 is supported by the reinforcement strip foundation 1. The original side beams 9 of the overpass are supported by introducing external diagonal braces 8 of the columns to support the original side beams 9 of the overpass, so as to support the original overpass structure, facilitate the removal of the original side columns 2 of the overpass, and provide space for the slope construction foundation of the new elevated layer columns.

[0050] In this embodiment, anti-pullout anchor rods 11 are provided on the reinforcement strip foundation 1 ; the anti-pullout anchor rods 11 are located on both sides of the short column foundation 5 and extend into the ground.

[0051] With such a structure, the anti-pullout anchor rod 11 makes the reinforced strip base 1 more stable;

[0052] In this embodiment, a first stiffening plate 12 is welded between the embedded welding plate 3 and the lower end of the steel pipe column 4 .

[0053] Such a structure is beneficial for strengthening the connection between the embedded welding plate 3 and the steel pipe column 4.

[0054] In this embodiment, the embedded welding plate 3 is provided with through holes 13 at intervals for the embedded steel bars 14 to penetrate and be welded and fixed. The lower end of the embedded steel bars 14 is bent into a hook and embedded in the reinforcement strip base 1.

[0055] Such a structure facilitates a tighter connection between the embedded welding plate 3 and the reinforcement strip base 1 .

[0056] In this embodiment, the I-steel 15 welded in the middle of the embedded welded plate 3 is embedded in the reinforcement strip base 1 .

[0057] With such a structure, the welded I-steel 15 further strengthens the connection between the welded plate 3 and the reinforcement strip base 1 .

[0058] In this embodiment, the middle portion of the column outer diagonal brace 8 is fixed to the upper end of the steel pipe column 4 via a diagonal brace 16 .

[0059] Such a structure is adopted to facilitate strengthening the connection between the column outer diagonal brace 8 and the steel pipe column 4.

[0060] In this embodiment, a semicircular ring-shaped counterweight 17 is additionally provided on the short column foundation 5 , and the semicircular ring-shaped counterweight 17 is adapted to the surface of the steel pipe column 4 .

[0061] With such a structure, the semicircular counterweight 17 facilitates adjustment of the center of gravity of the overall structure, balances the center of gravity of the strip foundation, and prevents overturning. Different numbers of semicircular counterweights 17 are mounted on different steel pipe columns 4, thereby achieving the effect of adjusting the center of gravity position.

[0062] In this embodiment, positioning steel bars 18 are pre-embedded on the short column foundation 5 , and corresponding positioning holes 19 are provided on the bottom surface of the semicircular ring-shaped counterweight 17 .

[0063] With such a structure, the positioning steel bars 18 prevent the semicircular ring-shaped counterweight 17 from slipping or falling during installation.

[0064] In this embodiment, a positioning short column 21 is set on the semicircular ring-shaped counterweight 17, and the positioning short column 21 is adapted to the positioning hole 19.

[0065] With such a structure, the semicircular ring-shaped counterweights 17 can be prevented from slipping when stacked up and down.

[0066] In this embodiment, a handle 10 is provided on one side of the counterweight 17 .

[0067] With such a structure, the handle 10 is easy to assemble with the counterweight 17 .

[0068] In this embodiment, the bottom of the steel pipe column 4 is connected to the embedded welded plate of the reinforced strip base 1. The strip base measures 0.5*3.75*13.5m, with C30 concrete grade. Double layers of φ14@200mm reinforcement are placed along the track, and double layers of φ16@170mm reinforcement are placed perpendicular to the track. The bottom protective layer of the strip base is 70mm thick, and the remaining protective layers are 40mm thick. φ32 anti-pull anchor rods are installed, anchored 500mm deep into the vertical and straight sections of the reinforced strip base 1, with a 200mm borehole diameter. The grouting material is P.042.5 cement with a water-cement ratio of 0.5. A C30 concrete-encased short column foundation 5 is installed at the base of the steel pipe column 4.

[0069] The utility model is convenient for carrying out reinforcement measures before demolition of the overpass, and adopts a scheme of reinforcing first and then demolishing, which is beneficial to the renovation of old station buildings, facilitates construction across existing lines, and ensures that the existing lines are not interrupted in operation.

[0070] The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For those skilled in the art of the present invention, it is possible to make several equivalent substitutions or obvious modifications without departing from the concept of the present invention, and the performance or use are the same, and all of them should be considered to fall within the scope of protection of the present invention.

Claims

1. A reinforcement structure for demolition of an existing platform overpass, characterized in that include: A reinforcement strip foundation (1) is arranged along the track between two original side columns (2) of the overpass; Embedded welding plates (3) are embedded at intervals at both ends of the surface of the reinforcement strip base (1); Steel pipe columns (4) welded to the embedded welding plates (3); A short column foundation (5) covers and fixes the steel pipe columns (4) arranged side by side at one end of the reinforced strip foundation (1); Scissor braces (6) are fixedly connected between the steel pipe columns (4) at both ends of the reinforcement strip base (1); A double-jointed I-steel distribution beam (7) is arranged on the steel pipe column (4); The outer diagonal brace (8) of the column has its lower end fixed to the lower end of the steel pipe column (4), and its upper end extends to and is fixed to the bottom surface of the original side beam (9) of the overpass supported by the original side column (2) of the overpass, and the lower end of the outer diagonal brace (8) of the column is also covered and fixed by the short column foundation (5).

2. The reinforcement structure for demolition of an existing platform bridge according to claim 1 is characterized in that Anti-pullout anchor rods (11) are provided on the reinforcement strip foundation (1), and the anti-pullout anchor rods (11) are located on both sides of the short column foundation (5) and extend into the ground.

3. The reinforcement structure for demolition of an existing platform bridge according to claim 1 is characterized in that A first stiffening plate (12) is welded between the embedded welding plate (3) and the lower end of the steel pipe column (4).

4. The reinforcement structure for demolition of an existing platform overpass according to claim 1 is characterized in that The embedded welding plate (3) is provided with perforations (13) at intervals for embedded steel bars (14) to penetrate and be welded and fixed. The lower end of the embedded steel bars (14) is bent into a hook and embedded in the reinforcement strip base (1).

5. The reinforcement structure for demolition of an existing platform bridge according to claim 1 is characterized in that The I-steel (15) welded in the middle of the embedded welding plate (3) is embedded in the interior of the reinforcement strip base (1).

6. The reinforcement structure for demolition of an existing platform overpass according to claim 1 is characterized in that The middle portion of the outer diagonal brace (8) of the column is fixed to the upper end of the steel pipe column (4) via a diagonal brace (16).

7. The reinforcement structure for demolition of an existing platform bridge according to claim 1 is characterized in that A semicircular ring-shaped counterweight (17) is added to the short column foundation (5), and the semicircular ring-shaped counterweight (17) is adapted to the surface of the steel pipe column (4).

8. The reinforcement structure for demolition of an existing platform bridge according to claim 7 is characterized in that Positioning steel bars (18) are pre-buried on the short column foundation (5), and corresponding positioning holes (19) are provided on the bottom surface of the semicircular ring counterweight (17).

9. The reinforcement structure for demolition of an existing railway platform overpass according to claim 8 is characterized in that A positioning short column (21) is arranged on the semicircular ring-shaped counterweight (17), and the positioning short column (21) is adapted to the positioning hole (19).

10. The reinforcement structure for demolition of an existing platform overpass according to claim 7 is characterized in that A handle (10) is provided on one side of the counterweight (17).

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