Pedestrian overpass steel box girder limiting structure

Abstract

A pedestrian overpass steel box beam limiting structure comprises a ribbed cover beam and a steel box beam, the steel box beam is located above the ribbed cover beam and supported on the ribbed cover beam through supports on the two sides, the pedestrian overpass steel box beam limiting structure further comprises two beam check blocks and two limiting blocks, a downwards-sunken receding space is formed in the top face of the ribbed cover beam, and the steel box beam is located in the receding space. The two limiting blocks are detachably and fixedly arranged on the top face of the ribbed cover beam through bolts and located on the two sides of the receding space respectively, the two beam check blocks are detachably and fixedly arranged on the bottom face of the steel box beam through bolts and located in the receding space respectively, and the beam check blocks and the corresponding limiting blocks are matched and combined to form the limiting structure. The device is simple in structure and low in processing cost, and has the advantages of simplicity and convenience in maintenance.

Description

Technical Field

[0001] The utility model relates to the field of municipal engineering, in particular to a steel box girder limiting structure of a pedestrian overpass. Background Art

[0002] Currently, when building pedestrian overpasses, steel box girders are supported on bridge piles through ribbed cap beams. In order to ensure the stability of the steel box girder and prevent it from falling off the ribbed cap beam due to earthquakes and impacts, beam stops are fixedly provided on the steel box girder and limit blocks are fixedly provided on the ribbed cap beam. The horizontal position of the steel box girder is limited by the cooperation of the beam stops and the limit blocks.

[0003] In order to meet the requirements of high-quality and high-efficiency construction, the steel box beam and ribbed cap beam are modular prefabricated structures, with beam stops welded on the steel box beam and limit blocks welded on the ribbed cap beam. Pedestrian bridges will always be displaced during long-term use, causing wear of beam stops and limit blocks, which need to be replaced after reaching the specified service life. The only way is to lift the steel box beam to a certain height for disassembly and replacement, which is time-consuming, labor-intensive, and costly.

[0004] Therefore, how to design a steel box girder limiting structure for a pedestrian bridge that is simple and convenient to maintain is a problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0005] The utility model aims to provide a pedestrian bridge steel box girder limiting structure in view of the deficiencies in the prior art, which has the advantages of simple structure, low processing cost and simple and convenient maintenance.

[0006] The technical solution of the utility model is: a pedestrian overpass steel box girder limiting structure, including a ribbed cap beam and a steel box girder, the steel box girder is located above the ribbed cap beam and is supported on the ribbed cap beam by supports on both sides, and also includes two beam stoppers and two limiting blocks, the top surface of the ribbed cap beam is provided with a downwardly recessed clearance space, the two limiting blocks are respectively detachably fixed on the top surface of the ribbed cap beam by bolts, and are located on both sides of the clearance space, the two beam stoppers are respectively detachably fixed on the bottom surface of the steel box girder by bolts, and are located in the clearance space, and the beam stoppers cooperate with the corresponding limiting blocks to form a limiting structure.

[0007] The clearance space is formed into an inverted trapezoidal structure by the inclined surfaces on both sides and the plane in the middle.

[0008] The beam stopper includes a horizontal connecting block, a vertical supporting block, and a vertical stopper. The vertical supporting block is fixedly connected to the middle of the bottom surface of the horizontal connecting block and is vertically distributed. The vertical stopper is fixedly connected to the bottom surface of the horizontal connecting block and to the side of the vertical supporting block, and is vertically distributed to form a three-dimensional structure. The beam stopper is detachably fixedly connected to the steel box beam by bolts passing through the horizontal connecting block, and cooperates with the limit block through the vertical stopper.

[0009] The bottom edge of the vertical support block is beveled, and the high point of the bevel is flush with the bottom edge of the vertical stopper. The inclination angle of the bevel is adapted to the bottom angle of the clearance space. Slide plates are fixedly provided on both sides of the vertical support block, and the slide plates are flush with the beveled edge of the vertical support block.

[0010] It also includes vertical reinforcing ribs and horizontal reinforcing ribs. The two sides of the vertical reinforcing ribs are respectively fixedly connected to the horizontal connecting block and the vertical supporting block, and the two sides of the horizontal reinforcing ribs are respectively fixedly connected to the vertical supporting block and the vertical stop block.

[0011] The limit block is in an inverted U-shaped structure, and a limit reinforcing rib is welded between two vertical sides of the limit block in the inverted U-shaped structure.

[0012] The above technical solution has the following beneficial effects:

[0013] 1. The limiting structure of the steel box girder of the pedestrian overpass includes a ribbed cap beam and a steel box girder. The steel box girder is located above the ribbed cap beam and is supported on the ribbed cap beam by supports on both sides. These structures are conventional structures of pedestrian overpasses. It also includes two beam stops and two limit blocks. The top surface of the ribbed cap beam is provided with a downwardly recessed clearance space, which does not affect the structural strength of the ribbed cap beam and is convenient for the maintenance of the beam stops and limit blocks. The two limit blocks are detachably fixed on the top surface of the ribbed cap beam by bolts and are located on both sides of the clearance space. The limit blocks connected to the ribbed cap beam can be manually removed and reset through the clearance space, which is convenient for maintenance. The two beam stops are detachably fixed on the bottom surface of the steel box girder by bolts and are located in the clearance space. The beam stops cooperate with the corresponding limit blocks to form a limit structure. The beam stops connected to the steel box girder can be removed and reset manually through the clearance space, which is convenient for maintenance. At the same time, the removed beam stops and limit blocks can be transferred to the low point of the clearance space through the downwardly recessed clearance space, which reduces the intensity of manual movement and facilitates the maintenance work of the pedestrian overpass.

[0014] 2. The clearance space is an inverted trapezoidal structure composed of the inclined surfaces on both sides and the plane in the middle, which is convenient for processing ribbed cap beams. At the same time, it is beneficial for the disassembled beam stops and limit blocks to slide on the inclined surfaces to the flat positions, and it is also beneficial for the replaced beam stops and limit blocks to be transferred to the installation position through the plane of the clearance space.

[0015] 3. The beam stopper includes a horizontal connection block, a vertical support block, and a vertical stopper. The vertical support block is fixedly connected to the middle of the bottom surface of the horizontal connection block and is vertically distributed. The vertical stopper is fixedly connected to the bottom surface of the horizontal connection block and the side of the vertical support block, and is vertically distributed to form a three-dimensional structure. The beam stopper is detachably fixedly connected to the steel box beam through bolts passing through the horizontal connection block, and cooperates with the limit block through the vertical stopper. The beam stopper of this structure is light in weight and high in structural strength, meeting the requirements of limiting the horizontal position of the steel box beam. The bottom edge of the vertical support block is an inclined surface, and the high point of the inclined surface is flush with the bottom edge of the vertical stopper. The inclination angle of the inclined surface is adapted to the bottom angle of the clearance space. Slide plates are fixedly arranged on both sides of the vertical support block, and the slide plates are flush with the bottom edge of the vertical support block. This structure can not only improve the structural strength of the beam stopper, but also increase the contact area between the beam stopper and the bottom surface of the clearance space, reducing the risk of scratching the ribbed cap beam.

[0016] Further description is given below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a matching schematic diagram of the utility model;

[0018] Figure 2 This is a structural schematic diagram of the beam stopper of the utility model;

[0019] Figure 3 for Figure 2 Bottom view of

[0020] Figure 4 It is a structural schematic diagram of the limit block of the utility model (top view).

[0021] In the attached drawings, 1 is a ribbed cap beam, 2 is a steel box beam, 3 is a beam stopper, 31 is a horizontal connecting block, 32 is a vertical supporting block, 33 is a vertical stopper, 34 is a slide plate, 4 is a limit block, 41 is a limit reinforcement rib, 5 is a clearance space, 51 is an inclined plane, 52 is a plane, 6 is a vertical reinforcement rib, and 7 is a horizontal reinforcement rib. DETAILED DESCRIPTION

[0022] See also Figures 1 to 4, which is a specific embodiment of the steel box girder limiting structure of a pedestrian overpass. The steel box girder limiting structure of the pedestrian overpass includes a ribbed cap beam 1 and a steel box girder 2. The ribbed cap beam and the steel box girder are conventional prefabricated structures, and usually, the steel box girder is provided with a manhole. The steel box girder 2 is located above the ribbed cap beam 1, and is supported on the ribbed cap beam 1 by supports on both sides. Obviously, in the construction of the pedestrian overpass, one section of steel box girder corresponds to at least two ribbed cap beams. For the convenience of explanation, this embodiment only involves the description of the limiting structure, and other structures and installation methods are operated in accordance with municipal construction specifications. The support structure further comprises two beam blocks 3 and two limit blocks 4. Specifically, the beam block 3 comprises a horizontal connecting block 31, a vertical supporting block 32 and a vertical stop block 33. The horizontal connecting block is a square block structure. The vertical supporting block 32 is fixedly connected to the middle part of the bottom surface of the horizontal connecting block 31 and is vertically distributed. The vertical stop block 33 is fixedly connected to the bottom surface of the horizontal connecting block 31 and to the side edges of the vertical supporting block 32, and are vertically distributed to form a three-dimensional structure. In order to strengthen the strength of the three-dimensional structure, the support structure further comprises vertical reinforcing ribs 6 and horizontal reinforcing ribs 7. The two side edges of the vertical reinforcing ribs 6 are fixedly connected to the horizontal connecting block 31 and the vertical supporting block 32, respectively. The two side edges of the horizontal reinforcing ribs 7 are fixedly connected to the vertical supporting block 32 and the vertical stop block 33, respectively. The limit block 4 is an inverted U-shaped structure. A limit reinforcing rib 41 is welded between the two vertical edges of the limit block having an inverted U-shaped structure. The top surface of the ribbed cap beam 1 is provided with a downwardly recessed clearance space 5. In this embodiment, the clearance space 5 is an inverted trapezoidal structure composed of inclined surfaces 51 on both sides and a plane 52 in the middle. Correspondingly, the bottom edge of the vertical support block 32 is inclined, and the high point of the inclined surface is flush with the bottom edge of the vertical stopper 33. The inclination angle of the inclined surface is adapted to the inclined surface angle of the clearance space. Slide plates 34 are fixedly provided on both sides of the vertical support block 32, and the slide plates 34 are flush with the bottom edge of the vertical support block 32. Two limit blocks 4 are detachably fixed on the top surface of the ribbed cap beam 1 by bolts, and are located on both sides of the clearance space 5. The two beam stop blocks 3 are detachably fixedly connected to the steel box beam by bolts passing through the horizontal connecting block 31, and cooperate with the limit blocks 4 through the vertical stopper 33 to form a limit structure.

[0023] The maintenance method of the utility model is as follows: the steel box girder with beam stopper and the ribbed cap beam with limit block can be prefabricated in the factory and assembled according to the method. When maintenance is needed, the beam stopper connected to the steel box girder is manually disassembled through the clearance space, and transferred from the inclined surface of the clearance space to the plane of the clearance space. Then, the limit block connected to the ribbed cap beam is manually disassembled through the clearance space, and transferred from the inclined surface of the clearance space to the plane of the clearance space. The limit block that has been replaced or maintained is reset and fixedly installed on the ribbed cap beam with bolts, and the beam stopper that has been replaced or maintained is reset and fixedly installed on the steel box girder with bolts to complete the maintenance.

Claims

1. A pedestrian bridge steel box girder limiting structure, comprising a ribbed cap beam (1) and a steel box beam (2), wherein the steel box beam (2) is located above the ribbed cap beam (1) and supported on the ribbed cap beam (1) through supports on both sides, characterized in that: It also includes two beam stoppers (3) and two limit blocks (4). The top surface of the ribbed cap beam (1) is provided with a downwardly recessed clearance space (5). The two limit blocks (4) are respectively detachably fixed on the top surface of the ribbed cap beam (1) by bolts and are located on both sides of the clearance space (5). The two beam stoppers (3) are respectively detachably fixed on the bottom surface of the steel box beam (2) by bolts and are located in the clearance space (5). The beam stoppers (3) cooperate with corresponding limit blocks (4) to form a limit structure.

2. The pedestrian bridge steel box girder limiting structure according to claim 1 is characterized in that: The clearance space (5) is formed into an inverted trapezoidal structure by inclined surfaces (51) on both sides and a plane (52) in the middle.

3. The pedestrian bridge steel box girder limiting structure according to claim 1 is characterized in that: The beam stopper (3) comprises a horizontal connection block (31), a vertical support block (32), and a vertical stopper (33); the vertical support block (32) is fixedly connected to the middle of the bottom surface of the horizontal connection block (31) and is vertically distributed; the vertical stopper (33) is fixedly connected to the bottom surface of the horizontal connection block (31) and to the side of the vertical support block (32), and is vertically distributed to form a three-dimensional structure; the beam stopper (3) is detachably fixedly connected to the steel box beam by bolts passing through the horizontal connection block (31), and is matched with the limit block (4) through the vertical stopper (33).

4. The pedestrian bridge steel box girder limiting structure according to claim 3 is characterized in that: The bottom edge of the vertical support block (32) is a beveled edge, and the high point of the beveled edge is flush with the bottom edge of the vertical stopper (33). The inclination angle of the beveled edge is adapted to the bottom angle of the clearance space. Slide plates (34) are fixedly provided on both sides of the vertical support block (32), and the slide plates (34) are flush with the beveled edge of the vertical support block (32).

5. The pedestrian bridge steel box girder limiting structure according to claim 3 is characterized in that: It also includes vertical reinforcing ribs (6) and horizontal reinforcing ribs (7), wherein two side edges of the vertical reinforcing ribs (6) are respectively fixedly connected to the horizontal connecting block (31) and the vertical supporting block (32), and two side edges of the horizontal reinforcing ribs (7) are respectively fixedly connected to the vertical supporting block (32) and the vertical stop block (33).

6. The pedestrian bridge steel box girder limiting structure according to claim 1 is characterized in that: The limit block (4) is in an inverted U-shaped structure, and a limit reinforcing rib (41) is welded between two vertical sides of the limit block in the inverted U-shaped structure.

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