Shallow-buried MB modular telescopic device

Abstract

The utility model provides a shallowly buried MB modular telescopic device which comprises a middle beam, boundary beams arranged on the two sides of the middle beam, a displacement control assembly and an anchoring assembly, the displacement control assembly and the anchoring assembly are arranged below the middle beam and the boundary beams, the boundary beams are of RG type steel structures, the opening sides of the boundary beams all point to the middle beam, and the middle beam is made of special steel shaped like a Chinese character'wang 'and comprises a T-shaped top and a rectangular supporting part. The T-shaped top part and the middle part of the rectangular supporting part are integrally formed; the displacement control assembly comprises a supporting cross beam and sliding parts symmetrically arranged at the two ends of the supporting cross beam, the two side beams are fixed to the sliding parts at the two ends of the supporting cross beam respectively, the middle beam is fixed to the middle of the supporting cross beam, and the anchoring assemblies are arranged on the outer sides of the sliding parts. According to the technical scheme provided by the utility model, the overall height of the device is effectively reduced, and meanwhile, the device is compact and stable in structure, high in reliability, convenient to construct and suitable for being applied in a shallow buried groove of a bridge expansion joint.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge expansion devices and relates to an expansion device, in particular to a shallow buried MB modular expansion device. Background Art

[0002] Existing bridge expansion devices mostly use traditional side beams, center beams and load-bearing cross beams, in which the load-bearing cross beams are arranged below the side beams and center beams. The traditional side beams and center beams are relatively high in height, so the overall height of the bridge expansion device formed with the load-bearing cross beams will be relatively high. This type of bridge expansion device needs to be deeply buried during installation. After deep burial, the side beams and displacement boxes at the expansion joints are deeply fixed in high-strength concrete. Not only is the construction more complicated when deeply buried, but the cost of later maintenance will also be relatively high. Although some of the existing shallowly buried expansion devices seem to be able to meet the needs of shallow burial, these shallowly buried expansion devices are often complex in structure, have poor stability during use, short life, and require frequent maintenance. Utility Model Content

[0003] The utility model aims to provide a shallow buried MB modular telescopic device to solve the technical problems in the prior art that the bridge telescopic device is not suitable for shallow burial or the existing shallow buried device has poor stability and short life.

[0004] In order to achieve the above purpose, the specific technical solution of the utility model is as follows:

[0005] A shallow buried MB modular telescopic device, comprising a middle beam, side beams arranged on both sides of the middle beam, a displacement control assembly and an anchoring assembly arranged below the middle beam and the side beams, the side beams are RG-shaped steel structures, and their opening sides are all directed to the middle beam, the middle beam is a special king-shaped steel, comprising a T-shaped top and a rectangular support portion, and the T-shaped top and the middle portion of the rectangular support portion are integrally formed;

[0006] The displacement control assembly includes a supporting beam and sliding parts symmetrically arranged at both ends of the supporting beam, the two side beams are respectively fixed on the sliding parts at both ends of the supporting beam, the middle beam is fixed at the middle part of the supporting beam, and the anchor assembly is arranged on the outside of the sliding part.

[0007] The sliding part includes a displacement box body, a load-bearing sliding seat, a pressure-bearing support, and a clamping support. The supporting beam is wide and flat, and the displacement box body is C-shaped and located on both sides of the supporting beam. The two ends of the supporting beam are respectively arranged in the body of the displacement box through pressure-bearing supports. The load-bearing sliding seat is contacted with the upper end surfaces of the two ends of the supporting beam. The side beam is arranged on the load-bearing sliding seat through a clamping support, and the side surface is fixed to the upper top of the displacement box body.

[0008] A load-bearing sliding seat is arranged in contact with the pressure-bearing support and the supporting crossbeam.

[0009] The sliding part also includes a limit plate, which is fixed on the side surfaces at both ends of the supporting beam, and the height of the limit plate is higher than the height of the load-bearing sliding seats on the upper and lower sides of the supporting beam.

[0010] The outer end of the displacement box body is provided with a displacement anchor nail.

[0011] The displacement control assembly also includes a chain plate and a chain plate box located outside the sliding portion and arranged below the side beams and the middle beam. The chain plate box is C-shaped and arranged at both ends of the chain plate. The chain plate is arranged in the chain plate box. The two ends of the chain plate are respectively fixed to the lower end of the side beam, and the middle part is fixed to the lower end of the middle beam.

[0012] The anchor assembly includes anchor steel bars and anchor plates. The anchor plates are welded and fixed to the bottom surface of the side beams. The anchor steel bars are welded and fixed to the sides of the anchor plates and are arranged below the side beams along an extension direction perpendicular to the side beams.

[0013] A waterproof rubber strip is arranged between the side beams and the middle beam.

[0014] The beneficial effect of the utility model is that the utility model provides a shallow buried MB modular telescopic device, and changes the structural form of the side beam and the middle beam: the side beam adopts an RG steel structure, and the middle beam adopts a special Wang-shaped steel structure of "upper T and lower square". Under the premise of meeting the vehicle load, bridge rotation, and telescopic changes, the heights of the side beam and the middle beam are respectively reduced; in addition, a wide flat supporting crossbeam is adopted, and load-bearing sliding seats are respectively arranged on the upper and lower sides thereof, which can further reduce the overall height of the telescopic device on the basis of ensuring the stress performance and multi-directional deformation at the expansion joint of the bridge.

[0015] The setting of the sliding part in the utility model forms the side beams, displacement box, load-bearing cross beam and middle beam into an inseparable whole, thereby ensuring the stability of the device structure during use. In addition, the chain plates and chain plate boxes that fix the middle beam and the two side beams can control the uniform displacement of the middle beam, improve the uniformity of the force of the device, and thus extend the service life of the device.

[0016] The technical solution provided by the utility model effectively reduces the overall height of the device. At the same time, the structure is reasonable, compact, stable, highly reliable, easy to construct, and has low subsequent maintenance and repair costs. It is suitable for use in shallow buried grooves of bridge expansion joints. In addition, since the device is suitable for shallow burial, it can effectively reduce the maintenance cost of the expansion device at the expansion joint of the bridge, and is suitable for promotion and application in the field of bridge expansion devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1It is a top view of the main structure of the utility model;

[0018] Figure 2 for Figure 1 The main view of

[0019] Figure 3 for Figure 1 A local enlarged schematic diagram of the middle A;

[0020] Figure 4 for Figure 1 Sectional view at B in the middle;

[0021] Figure 5 for Figure 1 Sectional view at C in the middle;

[0022] Figure 6 for Figure 1 Sectional view at D in the middle;

[0023] Figure 7 It is a top view of the expansion joint structure and partial installation when the utility model is applied.

[0024] Explanation of marks in the figure: 1. Middle beam, 2. Side beam, 3. Anchor assembly, 4. Displacement control assembly, 5. Support beam, 6. Displacement box body, 7. Load-bearing sliding seat, 8. Pressure bearing, 9. Compression bearing, 10. Limiting plate, 11. Displacement anchor nail, 12. Chain plate, 13. Chain plate box, 14. Anchor steel bar, 15. Anchor plate, 16. Gate steel bar, 17. Cross steel bar, 18. Chain plate connecting screws, 19. Bridge beam structure. DETAILED DESCRIPTION

[0025] In order to better understand the purpose, structure and function of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings.

[0026] like Figures 1 to 7 As shown, the utility model provides a shallow-buried MB modular telescopic device, which includes a center beam 1, side beams 2 arranged on both sides of the center beam 1, a displacement control assembly 4 and an anchoring assembly 3 arranged below the center beam 1 and the side beams 2. Traditional side beams 2 mostly adopt E-shaped steel or Z-shaped steel structure, and the center beam 1 mostly adopts Wang-shaped steel. The height of these steel sections is generally high. In this embodiment, in order to reduce the height of the telescopic device body, the side beams 2 are set to be RG-shaped steel structure, and their open sides are all pointing to the center beam 1. The center beam 1 is a special Wang-shaped steel, including a T-shaped top and a rectangular support part, and the T-shaped top is integrally formed with the middle part of the rectangular support part. The structural changes of the center beam 1 and the side beams 2 can effectively reduce the height of the side beams 2 and the center beam 1 by 3 to 5 cm, and at the same time, can significantly reduce the overall weight of the side beams 2 and the center beam 1. Thereby reducing the weight of the beam body borne by the displacement box body 6;

[0027] In addition, if Figure 4 As shown, the displacement control component 4 in this embodiment includes a supporting beam 5 and sliding parts symmetrically arranged at both ends of the supporting beam 5. The sliding part in this embodiment includes a displacement box body 6, a load-bearing sliding seat 7, a pressure-bearing support 8, and a clamping support 9. On the basis of reducing the height of the side beams 2 and the middle beam 1 and reducing the height of the middle beam 1, the supporting beam 5 can be set to a wide and flat shape with a thickness lower than that of a traditional beam. In this embodiment, the thickness of the wide and flat supporting beam 5 can be shortened by 3 cm compared with the traditional beam. The bottom surface of the rectangular supporting part of the middle beam 1 is fixed to the middle part of the supporting beam 5. The displacement box body 6 is C-shaped and located on both sides of the supporting beam 5. The two ends of the supporting beam 5 are respectively arranged in the body of the displacement box through the pressure-bearing support 8. The load-bearing sliding seat 7 is contacted with the upper end surfaces of the two ends of the supporting beam 5. The side beam 2 is arranged on the load-bearing sliding seat 7 through the clamping support 9, and the side is fixed to the upper top of the displacement box body 6. The anchoring component 3 is arranged on the outer end surface of the displacement box body 6. In addition, in order to ensure that the technical solution provided by this embodiment can still maintain relative stability with the bridge beam structure 19 when the bridge beam structure 19 undergoes expansion and contraction deformation, a load-bearing sliding seat 7 is also provided in contact between the pressure bearing 8 and the supporting beam 5 in this embodiment, thereby facilitating the supporting beam 5 to drive the middle beam 1 to move relative to the side beams 2.

[0028] In addition, in order to provide a limit for the support beam 5 and the middle beam 1, and to prevent the displacement of the support beam 5 from exceeding the safety range of the load-bearing sliding seat 7, the pressure bearing seat 8, and the pressing seat 9 when the bridge beam structure 19 undergoes multi-directional deformation and expansion, the sliding part in this embodiment also includes a limit plate 10, which is fixed on the side surfaces at both ends of the support beam 5, and the height of the limit plate 10 is higher than the height of the load-bearing sliding seats 7 on the upper and lower sides of the support beam 5. At the same time, in order to facilitate the limit of the displacement control assembly 4 and to stably cast it in concrete, a displacement anchor nail 11 is provided at the outer end of the displacement box body 6 in this embodiment.

[0029] Further, such as Figure 5 As shown, in order to control the uniform displacement of the center beam 1 relative to the side beams 2 when the bridge beam structure 19 undergoes multi-directional deformation, the displacement control assembly 4 in this embodiment also includes a chain plate 12 and a chain plate box 13 located outside the sliding portion and arranged below the side beams 2 and the center beam 1. The chain plate box 13 is C-shaped and arranged at both ends of the chain plate 12. The chain plate 12 is arranged in the chain plate box 13. The two ends of the chain plate 12 are respectively fixed to the lower end of the side beam 2 and the middle part is fixed to the lower end of the center beam 1 by chain plate connecting screws 18. It should be noted that the structure of the chain plate box 13 and the displacement box body 6 can be split or integrated. In this embodiment, Figure 1 , Figure 2 As shown, it is set as an integrated type.

[0030] Further, such as Figure 6 , Figure 7 As shown, the anchor assembly 3 in this embodiment includes an anchor steel bar 14 and an anchor plate 15. The anchor plate 15 is welded and fixed to the bottom surface of the side beam 2. The anchor steel bar 14 is welded and fixed to the side surface of the anchor plate 15 and is arranged below the side beam 2 along the extension direction perpendicular to the side beam 2. In addition, in order to further strengthen the firmness of the connection between the device and the bridge beam structure 19, the anchor assembly 3 in this embodiment also includes a gate-shaped steel bar 16 welded and fixed to the anchor steel bar 14, and a cross-shaped steel bar 17 crossing the anchor steel bar 14 and the gate-shaped steel bar 16, wherein the gate-shaped steel bar 16 is parallel to the plane where the anchor steel bar 14 is located, the top surface of the anchor steel bar 14 is higher than the top surface of the gate-shaped steel bar 16, and the cross-shaped steel bar 17 is arranged parallel to the side beam 2, and there are multiple gate-shaped steel bars 16 and the anchor steel bar 14 are welded together and buried in the concrete of the bridge beam structure 19.

[0031] Furthermore, in order to seal the displacement control assembly 4 and prevent stones and other debris from falling into the displacement control assembly 4 between the side beams 2 and the middle beam 1 and affecting the displacement of the middle beam 1, a waterproof rubber strip is provided between the side beams 2 and the middle beam 1 in this embodiment.

[0032] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A shallow buried MB modular telescopic device, characterized in that: It comprises a central beam (1), side beams (2) arranged on both sides of the central beam (1), a displacement control component (4) and an anchoring component (3) arranged below the central beam (1) and the side beams (2), the side beams (2) being an RG-shaped steel structure, the opening sides of which are all directed toward the central beam (1), the central beam (1) being a special steel beam, comprising a T-shaped top and a rectangular support portion, the T-shaped top and the middle portion of the rectangular support portion being integrally formed; The displacement control assembly (4) comprises a supporting crossbeam (5) and sliding parts symmetrically arranged at both ends of the supporting crossbeam (5), the two side beams (2) are respectively fixed to the sliding parts at both ends of the supporting crossbeam (5), the middle beam (1) is fixed to the middle part of the supporting crossbeam (5), and the anchor assembly (3) is arranged on the outside of the sliding part.

2. A shallow buried MB modular telescopic device according to claim 1, characterized in that: The sliding part comprises a displacement box body (6), a load-bearing sliding seat (7), a pressure-bearing support (8), and a clamping support (9); the support beam (5) is wide and flat; the displacement box body (6) is C-shaped and is located on both sides of the support beam (5); the two ends of the support beam (5) are respectively arranged in the body of the displacement box through pressure-bearing supports (8); the load-bearing sliding seat (7) is contacted with the upper end surfaces of the two ends of the support beam (5); the side beam (2) is arranged on the load-bearing sliding seat (7) through a clamping support (9), and the side surface is fixed to the upper top of the displacement box body (6).

3. A shallow buried MB modular telescopic device according to claim 2, characterized in that: A load-bearing sliding seat (7) is provided in contact between the pressure-bearing support seat (8) and the supporting crossbeam (5).

4. A shallow buried MB modular telescopic device according to claim 2, characterized in that: The sliding portion further comprises a limit plate (10), the limit plate (10) being fixed on the side surfaces at both ends of the support beam (5), and the height of the limit plate (10) being higher than the height of the load-bearing sliding seats (7) on the upper and lower sides of the support beam (5).

5. The shallow buried MB modular telescopic device according to claim 2, characterized in that: The outer end of the displacement box body (6) is provided with a displacement anchoring nail (11).

6. The shallow buried MB modular telescopic device according to claim 1, characterized in that: The displacement control assembly (4) further comprises a chain plate (12) and a chain plate box (13) which are located outside the sliding portion and are arranged below the side beams (2) and the middle beam (1); the chain plate box (13) is arranged in a C-shape at both ends of the chain plate (12); the chain plate (12) is arranged in the chain plate box (13); the two ends of the chain plate (12) are respectively fixed to the lower end of the side beams (2), and the middle part is fixed to the lower end of the middle beam (1).

7. The shallow buried MB modular telescopic device according to claim 1, characterized in that: The anchor assembly (3) comprises anchor steel bars (14) and an anchor plate (15); the anchor plate (15) is welded and fixed to the bottom surface of the side beam (2); the anchor steel bars (14) are welded and fixed to the side surfaces of the anchor plate (15) and are arranged below the side beam (2) along a direction perpendicular to the extension direction of the side beam (2).

8. The shallow buried MB modular telescopic device according to claim 1, characterized in that: A waterproof rubber strip is provided between the side beam (2) and the middle beam (1).

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