A static load testing device for a concrete box girder

Abstract

The utility model discloses a concrete box girder static load test device, including lower support base, two groups of positioning type cushion block subassembly are installed on lower support base, and the concrete box girder body is installed on positioning type cushion block subassembly, and the top of concrete box girder body is equipped with C shape support crossbeam, and the bottom of C shape support crossbeam is installed with three groups of static load experiment subassembly, and the sliding installation groove is opened to the symmetry on lower support base, and the both bottoms of C shape support crossbeam are all connected with the sliding connection subassembly extending to strip sliding slot, and the driving subassembly that cooperates with sliding connection subassembly is installed in sliding installation groove, and the beneficial effect: the utility model discloses when can guarantee the positioning of concrete box girder body in static load experiment, simultaneously can adjust different width properly, simultaneously can remove C shape support crossbeam when hoisting concrete box girder body, and the installation positioning of concrete box girder body is convenient.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction equipment technology, and more specifically, to a static load testing device for concrete box girders. Background Technology

[0002] A concrete box girder is installed between the two piers of the bridge. The concrete box girder is made by welding steel mesh and then pouring concrete. After the concrete box girder is made, a static load test is conducted to measure whether the deflection of the bridge under compression is within the standard.

[0003] The existing static load testing apparatus involves fixing two support beams on the ground, placing the left and right ends of the concrete box girder on the support beams, then using a crane to lift the support beams above the concrete box girder. The support beams are then connected to the support beams with steel bars. Several jacks are installed along the length of the concrete box girder between the lower end of the support beams and the concrete box girder. After the piston rods of the jacks extend, they generate static load pressure on the concrete box girder. After the test is completed, the steel bars are removed, the jacks are removed, and the support beams are lifted away by the crane, followed by the concrete box girder. The entire operation is cumbersome, affects the testing efficiency, and also makes it difficult to position the concrete box girder.

[0004] There are currently no effective solutions to the problems in the relevant technologies. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to propose a static load test device for concrete box girders.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a static load testing device for a concrete box girder, comprising a lower support base, two sets of positioning pad assemblies installed on the lower support base, a concrete box girder body installed on the positioning pad assemblies, a C-shaped support beam above the concrete box girder body, three sets of static load testing components installed at the bottom end of the C-shaped support beam, symmetrical sliding mounting grooves opened on the lower support base, and sliding connection assemblies extending to the sliding mounting grooves connected to both bottom ends of the C-shaped support beams, with a driving assembly cooperating with the sliding connection assembly installed in the sliding mounting groove.

[0007] Preferably, the positioning pad assembly includes a support pad fixed on the lower support base, with side abutment blocks installed on both sides of the support pad, an inclined abutment surface provided on the inner side of the side abutment block, an elastic rubber pad provided on the inclined abutment surface, and side limiting blocks that cooperate with the support pad integrally connected to both sides of the side abutment block.

[0008] Preferably, the support pad has symmetrical side sliding grooves on both sides, the inner wall of the side limiting block is fixedly connected to a side guide block extending into the side sliding groove, and the two ends of the support pad are fixedly installed with fixed support plates. A rotating threaded shaft that is rotatably connected to the side abutment block is threaded through the fixed support plate, and a limiting threaded ring located on the outside of the fixed support plate is sleeved on the rotating threaded shaft.

[0009] Preferably, the static load test assembly includes a jack, a support plate is fixedly installed on the top of the jack, the support plate is fixed to the C-shaped support beam by four sets of fixing bolts, a lower connecting block is fixedly connected to the bottom of the jack, a static load pressure sensor is installed at the bottom of the lower connecting block, and a lower pressure plate is installed at the bottom of the static load pressure sensor.

[0010] Preferably, the sliding connection assembly includes a side support plate integrally connected to the bottom end of the C-shaped support beam, a T-shaped sliding block is fixedly installed at the center of the bottom end of the C-shaped support beam, a threaded hole is provided through the center of the T-shaped sliding block, and a sliding wheel is rotatably installed at the bottom of the side support plate via a U-shaped frame.

[0011] Preferably, the drive assembly includes a T-shaped sliding groove located in the sliding mounting groove, the T-shaped sliding groove matching a T-shaped sliding block, and semi-circular rolling grooves on both sides of the T-shaped sliding groove in the sliding mounting groove. A drive motor is fixedly installed on one side of the lower support base, and the output end of the drive motor is connected to a transmission screw extending into the sliding mounting groove, the transmission screw passing through a threaded hole.

[0012] This utility model provides a static load testing device for concrete box girders, with the following advantages:

[0013] By installing two sets of positioning pad assemblies on the lower support base, the concrete box girder body is easily fixed, preventing it from moving during static load testing. Three sets of static load testing assemblies installed at the bottom of the C-shaped support beam can conduct static load tests on the concrete box girder body. The sliding connection assembly installed in the sliding installation groove, with the cooperation of the drive assembly, moves the C-shaped support beam and the three sets of static load testing assemblies installed on it, so that it can be moved to one side of the positioning pad assembly before hoisting, facilitating the hoisting work. This utility model can ensure the positioning of the concrete box girder body during static load testing, and can also appropriately adjust different widths. At the same time, it can remove the C-shaped support beam when hoisting the concrete box girder body, facilitating the installation and positioning of the concrete box girder body. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a front view of a static load testing device for a concrete box girder according to an embodiment of the present utility model;

[0016] Figure 2 This is a structural schematic diagram of a positioning pad assembly in a static load testing device for concrete box girders according to an embodiment of the present utility model;

[0017] Figure 3 This is a schematic diagram of the static load test component in a static load test device for concrete box girders according to an embodiment of the present utility model;

[0018] Figure 4 This is a structural schematic diagram of a sliding connection component in a static load testing device for concrete box girders according to an embodiment of the present invention;

[0019] Figure 5 This is a schematic diagram of the drive component in a static load testing device for concrete box girders according to an embodiment of the present invention.

[0020] In the picture:

[0021] 1. Lower support base; 2. Positioning pad assembly; 3. Concrete box girder body; 4. C-shaped support beam; 5. Static load test assembly; 6. Sliding mounting groove; 7. Sliding connection assembly; 8. Support pad; 9. Side contact block; 10. Inclined contact surface; 11. Elastic rubber pad; 12. Side limiting block; 13. Side guide block; 14. Side sliding groove; 15. Fixed support plate; 16. Rotary threaded shaft; 17. Limiting threaded ring; 18. Jack; 19. Support plate; 20. Fixing bolt; 21. Lower connecting block; 22. Static load pressure sensor; 23. Lower pressure plate; 24. Side support plate; 25. T-shaped sliding block; 26. Threaded hole; 27. U-shaped frame; 28. Sliding wheel; 29. ​​Transmission screw; 30. T-shaped sliding groove; 31. Semi-circular rolling groove; 32. Drive motor. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-5 This utility model provides a static load testing device for a concrete box girder, including a lower support base 1. Two sets of positioning pad assemblies 2 are installed on the lower support base 1, and a concrete box girder body 3 is installed on the positioning pad assemblies 2. By installing two sets of positioning pad assemblies 2 on the lower support base 1, the concrete box girder body 3 can be easily fixed to prevent it from moving during the static load test. A C-shaped support beam 4 is provided above the concrete box girder body 3. Three sets of static load test assemblies 5 are installed at the bottom end of the C-shaped support beam 4. Component 5 can perform static load tests on the concrete box girder body 3. The lower support base 1 is symmetrically provided with sliding installation grooves 6. Both bottom ends of the C-shaped support beam 4 are connected to sliding connection components 7 that extend to the sliding installation grooves 6. The sliding installation groove 6 is equipped with a drive component that cooperates with the sliding connection component 7. With the cooperation of the drive component, the sliding connection component 7 installed in the sliding installation groove 6 can move the C-shaped support beam 4 and the three sets of static load test components 5 installed on it, so that it can be moved to one side of the positioning pad component 2 before hoisting, which facilitates the hoisting work.

[0024] In one embodiment, please refer to the appendix to the specification. Figure 2 As shown, the positioning pad assembly 2 includes a support pad 8 fixed on the lower support base 1. Side abutment blocks 9 are installed on both sides of the support pad 8. An inclined abutment surface 10 is provided on the inner side of the side abutment block 9. An elastic rubber pad 11 is provided on the inclined abutment surface 10. Side limiting blocks 12 that cooperate with the support pad 8 are integrally connected to both sides of the side abutment block 9. Side sliding grooves 14 are symmetrically provided on both sides of the support pad 8. Side guide blocks 13 extending into the side sliding grooves 14 are fixedly connected to the inner wall of the side limiting blocks 12. Fixed support plates 15 are fixedly installed at both ends of the support pad 8. A rotating threaded shaft 16 that is rotatably connected to the side abutment block 9 is threaded through the fixed support plate 15. A limiting threaded ring 17 located outside the fixed support plate 15 is sleeved on the rotating threaded shaft 16. The concrete box girder body 3 is hoisted onto the support pad 8. The side contact block 9 is pushed forward by rotating the threaded shaft 16, so that the elastic rubber pad 11 on the inclined contact surface 10 contacts the concrete box girder body 3, thereby realizing the limiting work of the concrete box girder body 3.

[0025] In one embodiment, please refer to the appendix to the specification. Figure 3 As shown, the static load test assembly 5 includes a jack 18, with a support plate 19 fixedly mounted on the top of the jack 18. The support plate 19 is fixed to the C-shaped support beam 4 by four sets of fixing bolts 20. A lower connecting block 21 is fixedly connected to the bottom of the jack 18, and a static load pressure sensor 22 is installed at the bottom of the lower connecting block 21. A lower pressure plate 23 is installed at the bottom of the static load pressure sensor 22. By driving the lower connecting block 21 through the jack 18, the lower pressure plate 23 at the bottom of the static load pressure sensor 22 conducts a static load test on the concrete box girder body 3.

[0026] In one embodiment, please refer to the appendix to the specification. Figure 4-5 As shown, the sliding connection assembly 7 includes a side support plate 24 integrally connected to the bottom end of the C-shaped support beam 4. A T-shaped sliding block 25 is fixedly installed at the center of the bottom end of the C-shaped support beam 4. A threaded hole 26 is provided through the center of the T-shaped sliding block 25. A sliding wheel 28 is rotatably installed on the bottom of the side support plate 24 through a U-shaped frame 27. The drive assembly includes a T-shaped sliding groove 30 located in the sliding mounting groove 6. The T-shaped sliding groove 30 matches the T-shaped sliding block 25. Semi-circular rolling grooves 31 are provided on both sides of the T-shaped sliding groove 30 in the sliding mounting groove 6. A drive motor 32 is fixedly installed on one side of the lower support base 1. The output end of the drive motor 32 is connected to a transmission screw 29 extending into the sliding mounting groove 6. The transmission screw 29 passes through the threaded hole 26. The drive motor 32 drives the transmission screw 29 to rotate, thereby enabling the T-shaped sliding block 25 to move in conjunction with the threaded hole 26. When the T-shaped sliding block 25 moves in the T-shaped sliding groove 30, the sliding wheel 28 can roll in the semi-circular rolling groove 31, which can reduce the friction of its movement.

[0027] In practical applications, two sets of positioning pad components 2 are installed on the lower support base 1 to facilitate the fixation of the concrete box girder body 3 and prevent it from moving during static load tests. The three sets of static load test components 5 installed at the bottom of the C-shaped support beam 4 can conduct static load tests on the concrete box girder body 3. The sliding connection component 7 installed in the sliding installation groove 6, with the cooperation of the drive component, moves the C-shaped support beam 4 and the three sets of static load test components 5 installed on it, so that it can be moved to one side of the positioning pad component 2 before hoisting, which facilitates the hoisting work. This utility model can ensure the positioning of the concrete box girder body 3 during static load tests, and can also adjust different widths appropriately. At the same time, it can remove the C-shaped support beam 4 when hoisting the concrete box girder body 3, which facilitates the installation and positioning of the concrete box girder body 3.

[0028] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A static load testing device for concrete box girders, characterized in that, The system includes a lower support base (1), on which two sets of positioning pad assemblies (2) are installed. A concrete box girder body (3) is installed on the positioning pad assemblies (2). A C-shaped support beam (4) is provided above the concrete box girder body (3). Three sets of static load test assemblies (5) are installed at the bottom of the C-shaped support beam (4). A sliding mounting groove (6) is symmetrically provided on the lower support base (1). Both bottom ends of the C-shaped support beam (4) are connected to a sliding connection assembly (7) extending to the sliding mounting groove (6). A drive assembly that cooperates with the sliding connection assembly (7) is installed in the sliding mounting groove (6). The sliding connection assembly (7) includes a side support plate (24) integrally connected to the bottom end of the C-shaped support beam (4). (4) A T-shaped sliding block (25) is fixedly installed at the center of the bottom end. A threaded hole (26) is provided through the center of the T-shaped sliding block (25). A sliding wheel (28) is rotatably installed at the bottom of the side support plate (24) through a U-shaped frame (27). The drive assembly includes a T-shaped sliding groove (30) located in the sliding mounting groove (6). The T-shaped sliding groove (30) matches the T-shaped sliding block (25). Semi-circular rolling grooves (31) are provided on both sides of the T-shaped sliding groove (30) in the sliding mounting groove (6). A drive motor (32) is fixedly installed on one side of the lower support base (1). The output end of the drive motor (32) is connected to a transmission screw (29) extending into the sliding mounting groove (6). The transmission screw (29) passes through the threaded hole (26).

2. The static load testing device for concrete box girders according to claim 1, characterized in that, The positioning pad assembly (2) includes a support pad (8) fixed on the lower support base (1). Side abutment blocks (9) are installed on both sides of the support pad (8). An inclined abutment surface (10) is opened on the inner side of the side abutment block (9). An elastic rubber pad (11) is provided on the inclined abutment surface (10). Side limiting blocks (12) that cooperate with the support pad (8) are integrally connected to both sides of the side abutment block (9).

3. The static load testing device for concrete box girders according to claim 2, characterized in that, The support pad (8) is provided with symmetrical side sliding grooves (14) on both sides. The inner wall of the side limiting block (12) is fixedly connected with a side guide block (13) extending into the side sliding groove (14). The two ends of the support pad (8) are fixedly installed with fixed support plates (15). A rotating threaded shaft (16) that is rotatably connected to the side abutment block (9) is threaded through the fixed support plate (15). A limiting threaded ring (17) located outside the fixed support plate (15) is sleeved on the rotating threaded shaft (16).

4. The static load testing device for concrete box girders according to claim 3, characterized in that, The static load test assembly (5) includes a jack (18), a support plate (19) is fixedly installed on the top of the jack (18), the support plate (19) is fixed to the C-shaped support beam (4) by four sets of fixing bolts (20), a lower connecting block (21) is fixedly connected to the bottom of the jack (18), a static load pressure sensor (22) is installed at the bottom of the lower connecting block (21), and a lower pressure plate (23) is installed at the bottom of the static load pressure sensor (22).

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