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

Abstract

The utility model relates to a reinforcing strip foundation structure for demolition construction of an existing line-crossing overbridge. The reinforcing strip foundation structure comprises a reinforcing strip foundation main body, the embedded welding plates are arranged at the two ends of the surface of the reinforcing strip base body at intervals, and penetrating holes are formed in the embedded welding plates at intervals; the embedded steel bar penetrates into the through hole and is welded and fixed, and the lower part of the embedded steel bar is anchored into the reinforcing strip foundation main body in a hook shape; the anti-pulling anchor rod is arranged in the reinforcing strip foundation main body and anchored into the ground; the short column foundations are arranged at the two ends of the reinforcing strip foundation body at intervals; the positioning steel bars are arranged on the short column foundation at intervals; a positioning hole is formed in the bottom of the counter weight, and the positioning hole is matched with the positioning steel bar; and a positioning short column is arranged on the counter weight and is matched with the positioning hole. According to the utility model, the gravity center is convenient to adjust, overturning is prevented, reinforcement measures can be carried out before the overbridge is dismantled, the scheme of first reinforcement and then dismantling is adopted, old station building reconstruction is facilitated, existing line-crossing construction is facilitated, and non-stop operation of the existing line is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of demolition construction of platform overpasses across existing lines, in particular to a reinforced strip foundation structure used for demolition construction of platform overpasses 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 reinforced strip foundation structure for the demolition construction of an overpass across an existing line, which is convenient for adjusting the center of gravity and preventing overturning. It is conducive to reinforcement measures before the overpass is demolished. The solution of reinforcing first and then demolishing is adopted, which is conducive to the renovation of old station buildings, facilitates construction across existing lines, and ensures that the existing lines are not interrupted.

[0004] In order to solve the above problems, a reinforced strip foundation structure for the demolition of overpasses across existing lines was adopted, which includes:

[0005] Strengthen the main body of the strip foundation;

[0006] Embedded welding plates are arranged at intervals at both ends of the surface of the reinforcement strip base body, and are provided with perforations at intervals;

[0007] Embedded steel bars are inserted into the holes and fixed by welding, with their lower parts hooked and anchored into the main body of the reinforcement strip base;

[0008] An anti-pullout anchor rod is set in the reinforcement strip foundation body and anchored into the ground;

[0009] Short column foundations are spaced at both ends of the main body of the reinforced strip foundation;

[0010] Positioning steel bars, which are set at intervals on the short column foundation;

[0011] A counterweight is provided with a positioning hole at the bottom, and the positioning hole is adapted to the positioning steel bar; a positioning short column is provided on the counterweight, and the positioning short column is adapted to the positioning hole.

[0012] With such a structure, the counterweights can be stacked up and down, and the positioning steel bars, positioning holes and positioning short columns can prevent the counterweights from slipping. By stacking different numbers of counterweights at different positions, the center of gravity can be easily adjusted.

[0013] As a further improvement of the present invention, the counterweights are distributed at four corners on the short column basis.

[0014] With such a structure, the counterweights distributed at the four corners are conducive to adjusting the center of gravity and preventing the strip foundation from overturning.

[0015] As a further improvement of the present invention, the counterweight is in a semicircular shape and is made of concrete.

[0016] With this structure, the semicircular ring fits into the steel pipe column.

[0017] As a further improvement of the present invention, a handle is provided on the counterweight.

[0018] With such a structure, the handle is convenient for installing the counterweight, and the handle can cooperate with installation operations such as lifting and carrying.

[0019] As a further improvement of the present invention, the welded I-beam in the middle of the embedded welded plate is embedded in the reinforcement strip base body.

[0020] With such a structure, the embedded welding plate is more tightly connected to the reinforcement strip base body.

[0021] As a further improvement of the present invention, a plurality of stiffening plates are distributed at intervals along the circumferential direction on the upper surface of the embedded welding plate.

[0022] With this structure, the stiffening plates facilitate positioning and welding of steel pipe columns.

[0023] As a further improvement of the present invention, a grid foundation is provided between the short column foundations.

[0024] Such a structure is used to strengthen the middle part of the grid foundation.

[0025] The utility model is convenient for adjusting the center of gravity and preventing overturning, which is beneficial for carrying out reinforcement measures before demolition of the overpass. The scheme of reinforcing first and then demolishing is adopted, which is beneficial for the renovation of old station buildings and facilitates construction across existing lines, thus ensuring that the existing lines are not interrupted in operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of the structure of the embodiment.

[0027] Figure 2 It is a structural schematic diagram of an embodiment from another angle.

[0028] Figure 3 It is a side elevational cross-sectional schematic diagram of an embodiment.

[0029] Figure 4 Schematic diagram of the installation position relationship between the embodiment and the original overpass.

[0030] Figure 5 This is a top view of the reinforced strip foundation.

[0031] Figure 6 Schematic diagram of the structure of the pull-out anchor.

[0032] Figure numerals: 1. Reinforced strip base body; 2. Embedded welded plate; 21. Perforation; 22. Stiffening plate; 3. Embedded steel bars; 4. Pull-out anchor rod; 5. Short column foundation; 6. Positioning steel bars; 7. Counterweight; 71. Positioning hole; 72. Positioning short column; 8. Handle; 9. I-beam; 10. Grid foundation; 11. Steel pipe column; 12. New pedestal. DETAILED DESCRIPTION

[0033] 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.

[0034] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or components referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes and should not be understood as indicating or implying relative importance; in addition, unless otherwise expressly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or it can be internal communication between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] Example 1

[0036] like Figures 1-6 As shown, a reinforced strip foundation structure for demolition construction of an overpass across an existing line comprises:

[0037] Reinforce the strip base body 1;

[0038] Embedded welding plates 2 are spaced apart at both ends of the surface of the reinforcement strip base body 1 and have through holes 21 spaced apart thereon;

[0039] Embedded steel bars 3 are inserted into the through holes 21 and fixed by welding, with their lower parts being hook-shaped and anchored into the reinforcement bar base body 1;

[0040] An anti-pullout anchor rod 4, which is arranged in the reinforcement strip base body 1 and anchored into the ground;

[0041] Short column foundations 5 are spaced apart and arranged at both ends of the reinforcement strip foundation body 1;

[0042] Positioning steel bars 6, which are arranged at intervals on the short column foundation 5;

[0043] The counterweight 7 has a positioning hole 71 at its bottom, and the positioning hole 71 is adapted to the positioning steel bar 6; the counterweight 7 has a positioning short column 72 on its top, and the positioning short column 72 is adapted to the positioning hole 71.

[0044] With such a structure, the counterweight 7 can be stacked up and down, and the positioning steel bars 6, positioning holes 71 and positioning short columns 72 prevent the counterweight 7 from slipping. By stacking different numbers of counterweights 7 at different positions, the center of gravity position can be easily adjusted.

[0045] In this embodiment, the counterweights 7 are distributed at four corners on the short column foundation 5 .

[0046] With such a structure, the counterweights 7 distributed at the four corners are conducive to adjusting the center of gravity and preventing the strip foundation from overturning.

[0047] In this embodiment, the counterweight 7 is in a semicircular shape and is made of concrete.

[0048] With this structure, the semicircular ring fits into the steel pipe column.

[0049] In this embodiment, a handle 8 is provided on the counterweight 7 .

[0050] With such a structure, the handle 8 is convenient for installing the counterweight 7, and the handle 8 can cooperate with installation operations such as lifting and carrying.

[0051] In this embodiment, the I-beam 9 welded in the middle of the embedded welded plate 2 is embedded in the reinforcement strip base body 1 .

[0052] With such a structure, the embedded welding plate 2 is more tightly connected to the reinforcement strip base body 1 .

[0053] In this embodiment, a plurality of stiffening plates 22 are distributed at intervals along the circumferential direction on the upper surface of the embedded welding plate 2 .

[0054] With such a structure, the stiffening plate 22 facilitates the positioning and welding of the steel pipe columns.

[0055] In this embodiment, a grid foundation 10 is provided between the short column foundations 5 .

[0056] Such a structure is used to strengthen the middle portion of the grid foundation 10 .

[0057] The utility model is convenient for adjusting the center of gravity and preventing overturning, which is beneficial for carrying out reinforcement measures before demolition of the overpass. The scheme of reinforcing first and then demolishing is adopted, which is beneficial for the renovation of old station buildings and facilitates construction across existing lines, thus ensuring that the existing lines are not interrupted in operation.

[0058] In this embodiment, the bottom of the steel pipe column is connected to the embedded welded plate of the reinforcement strip base body 1. The strip base measures 0.5*3.75*13.5m, with a C30 concrete grade. Double layers of φ14@200mm reinforcement are provided along the track, and double layers of φ16@170mm reinforcement are provided 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-pullout anchor rods are installed, anchored 500mm deep into both the vertical and straight sections of the reinforcement strip base body 1. The drilled holes are 200mm in diameter, and 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.

[0059] In this embodiment, the reinforced strip foundation body 1 is laid between two original overpass columns along the track to modify the temporary steel pipe columns and support the original overpass structure, thereby facilitating the removal of the original overpass columns and the construction of new elevated floors on both sides of the original overpass. During the construction of the elevated floors, the reinforced strip foundation structure can adjust the center of gravity according to the construction progress to prevent the strip foundation from overturning.

[0060] 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 reinforced strip foundation structure for demolition of an existing overpass, characterized in that include: Reinforce the strip base body (1); Embedded welding plates (2) are arranged at intervals on both ends of the surface of the reinforcement strip base body (1), and perforations (21) are arranged at intervals on the pre-embedded welding plates (2); Embedded steel bars (3) are inserted into the holes (21) and fixed by welding, and their lower parts are hook-shaped and anchored into the reinforcement bar base body (1); An anti-pullout anchor rod (4) is arranged in the reinforcement strip foundation body (1) and anchored into the ground; Short column foundations (5) are spaced apart and arranged at both ends of the reinforcement strip foundation body (1); Positioning steel bars (6), which are arranged at intervals on the short column foundation (5); The counterweight (7) has a positioning hole (71) at its bottom, and the positioning hole (71) is adapted to the positioning steel bar (6); a positioning short column (72) is provided on the top of the counterweight (7), and the positioning short column (72) is adapted to the positioning hole (71).

2. The reinforced strip foundation structure for demolition of an existing overpass according to claim 1 is characterized in that The counterweights (7) are distributed at four corners on the short column foundation (5).

3. The reinforced strip foundation structure for demolition of an existing overpass according to claim 1 is characterized in that The counterweight (7) is in the shape of a semicircle and is made of concrete.

4. The reinforced strip foundation structure for demolition of an existing overpass according to claim 1 is characterized in that A handle (8) is provided on the counterweight (7).

5. The reinforced strip foundation structure for demolition of an existing overpass according to claim 1 is characterized in that The welded I-steel (9) in the middle of the embedded welded plate (2) is embedded in the reinforcement strip base body (1).

6. The reinforced strip foundation structure for demolition of an existing overpass according to claim 1 is characterized in that A plurality of stiffening plates (22) are distributed at intervals along the circumferential direction on the upper surface of the embedded welding plate (2).

7. The reinforced strip foundation structure for demolition of an existing overpass according to claim 1 is characterized in that A grid foundation (10) is provided between the short column foundations (5).

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