Old bridge demolition structure protection device

Abstract

The utility model relates to a protective device for an old bridge dismantling structure. The protective device comprises a U-shaped steel channel, a protective net, fasteners and a pair of trapezoidal blocks, wherein the U-shaped steel channel covers a plate girder in a clearance manner; the protective net is arranged on the U-shaped steel channel and covers a hinge joint; the fasteners are arranged at the top of the U-shaped steel channel at intervals; the wedge-shaped block is inserted between the pair of trapezoidal blocks, and the screw pair is arranged between the U-shaped channel steel and the wedge-shaped block. Through the protection combination of the U-shaped channel steel and the protection net and the limiting effect of the fastener, the trapezoidal block, the wedge-shaped block and the screw pair, the safety problem caused by hinge joint concrete blocks left after an existing old bridge is dismantled is solved, and the purposes that installation is easy and convenient, and the concrete blocks are prevented from falling off easily are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge engineering, in particular to a protective device for dismantling an old bridge structure. Background Art

[0002] During inland waterway regulation projects, bridges across the waterway must meet the clearance requirements (clear width and height) set by the waterway planning. Bridges that fail to meet these standards must be rebuilt. Existing inland waterway bridges are mostly hollow slab beam bridges, with hinged joints directly in the hollow slabs. The current solution is to demolish the entire bridge and build a new one in its place. This reconstruction often involves temporary road closures, disrupting local traffic and causing significant social impacts, making a complete, one-time effort impossible. Therefore, the requirement is to demolish half of the existing bridge, then build a new half, then demolish the remaining section of the old bridge, and then build the new one.

[0003] The above-mentioned existing technical solutions have the following defects: during the construction process of the above-mentioned method, part of the bridge deck of the old bridge must be removed, while the remaining part is retained as the basis for the construction of the new bridge. However, during the demolition process, the removal of the slab-beam hinge joints often becomes a thorny problem; the hinge joints are important structures connecting the bridge deck blocks, but during demolition, these hinge joints are often difficult to completely remove, resulting in some concrete blocks remaining on the side of the old bridge, forming a high-altitude hanging state, which not only affects the cleanliness of the construction site, but also brings potential safety hazards; if these concrete blocks accidentally fall off during construction, it may pose a serious threat to the personnel and equipment on the construction site. In order to ensure the safety of the construction site and prevent these hanging concrete blocks from falling off, the construction team must take a series of effective protective measures. Utility Model Content

[0004] The problem to be solved by the present invention is to provide a protective device for the demolished structure of an old bridge in response to the above-mentioned deficiencies in the prior art, which solves the safety problems caused by the hinged joint concrete blocks left over from the demolition of the existing old bridge, and achieves the purpose of easy installation and preventing these concrete blocks from falling off easily.

[0005] The above-mentioned utility model object of the present invention is achieved through the following technical solutions:

[0006] A protective device for the demolition structure of an old bridge, used to cooperate with the arrangement of the outermost plate beams and hinged joints of the old bridge, includes a ⌚-shaped channel steel arranged on the plate beam in a gap-covered manner, a protective net arranged on the ⌚-shaped channel steel and covering the hinged joint, fasteners arranged at intervals on the top of the ⌚-shaped channel steel, a pair of trapezoidal blocks arranged between two adjacent fasteners and symmetrically arranged between the ⌚-shaped channel steel and the plate beam, a wedge-shaped block inserted between the pair of trapezoidal blocks, and a spiral pair arranged between the ⌚-shaped channel steel and the wedge-shaped block.

[0007] By adopting the above technical solutions, the hinge joint concrete blocks generated during the demolition of the old bridge can be effectively fixed, preventing them from accidentally falling off during the construction process; the design of the protection device takes into account the particularity of the old bridge demolition. Through the protection combination of the U-shaped steel channel and the protection net, supplemented by the limiting effects of fasteners, trapezoidal blocks, wedge blocks and screw pairs, the stability and safety of the structure are ensured; in addition, the installation process of this device is simple and fast, without complex construction techniques, greatly improving the construction efficiency and reducing the construction cost at the same time; through practical applications, this protection device has proven to be able to significantly reduce the safety risks during the construction process and provide reliable safety guarantees for construction personnel and equipment.

[0008] The present utility model is further configured such that: the U-shaped steel channel is a No. 12 steel channel.

[0009] By adopting the above technical solutions, effective fixation of the hinge joint concrete blocks during the demolition of the old bridge can be achieved, avoiding the accidental falling off of the concrete blocks during the construction process.

[0010] The present utility model is further configured such that: the protection net is adhesively bonded to the U-shaped steel channel.

[0011] By adopting the above technical solutions, the adhesive used for bonding the protection net can be a thermoplastic glue, a photo-curing adhesive or a two-component epoxy resin, etc. These adhesives have good bonding properties and durability, and can ensure a tight combination between the protection net and the U-shaped steel channel, thus providing a more stable protection during the demolition of the old bridge; in addition, the selection of the adhesive also takes into account the temperature and humidity conditions of the construction environment to ensure the best bonding effect under different climatic conditions; through such technical measures, the reliability of the protection device and the safety of the construction are further improved.

[0012] The present utility model is further configured such that: the protection net is a wire mesh, and the surface of the protection net is arranged opposite to the side of the hinge joint and the bottom surface of the slab beam.

[0013] [[ID=!8]]By adopting the above technical solutions, effective fixation of the hinge joint concrete blocks during the demolition of the old bridge can be achieved, avoiding the accidental falling off of the concrete blocks during the construction process.

[0014] The present utility model is further configured such that: the fastener includes a fixing nut provided on the top of the U-shaped steel channel and a limiting bolt threadedly connected to the fixing nut. The end of the limiting bolt extends into the U-shaped steel channel and is arranged opposite to the sides of the trapezoidal block and the wedge block.

[0015] By adopting the above technical solution, the limit bolt is rotated in advance so that the bottom end of the limit bolt abuts against the top surface of the beam slab, so as to reserve space for the installation of the trapezoidal block and the wedge-shaped block, and at the same time can limit the horizontal movement of the trapezoidal block and the wedge-shaped block, ensuring the protection stability.

[0016] The present utility model is further arranged as: the end of the limit bolt abuts against the top surface of the plate beam.

[0017] By adopting the above technical solution, on the basis of the trapezoidal block and the wedge-shaped block being tightly abutted and limited, the fixing of the C-shaped steel channel on the beam slab can be strengthened, so as to ensure that the beam slab will not be displaced or tilted due to external forces during the demolition of the old bridge, improving the construction safety.

[0018] The present utility model is further arranged as: the screw pair includes an adjusting screw rod rotatably connected to the wedge-shaped block and an adjusting nut arranged on the outer wall of the C-shaped steel channel, and one end of the adjusting screw rod passes through the C-shaped steel channel and is threadedly connected to the adjusting nut.

[0019] By adopting the above technical solution, after the upper trapezoidal block, the wedge-shaped block and the lower trapezoidal block are stacked and installed between the C-shaped steel channel and the beam slab, by rotating the adjusting screw rod, the wedge-shaped block can be driven to move obliquely between this pair of trapezoidal blocks, and then the stacked height of the wedge-shaped block and the trapezoidal block can be adjusted to strengthen the fixing of the C-shaped steel channel on the beam slab.

[0020] The present utility model is further arranged as: the screw pair further includes a holding portion arranged at the other end of the adjusting screw rod.

[0021] By adopting the above technical solution, it is convenient for the user to grasp and apply force.

[0022] To sum up, the beneficial technical effects of the present utility model are: through the protection combination of the C-shaped steel channel and the protection net, and supplemented by the limiting effects of the fasteners, trapezoidal blocks, wedge-shaped blocks and screw pairs, the safety problem caused by the hinge joint concrete blocks left over from the demolition of existing old bridges is solved, achieving the purpose of simple installation and preventing these concrete blocks from easily falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the connection relationship between the protection device, the plate beam and the hinge joint of the present utility model.

[0024] Figure 2 is a schematic diagram of the structure of the protection device of the present utility model.

[0025] In the figure, 1, C-shaped steel channel; 2, protection net; 3, fasteners; 31, fixing nut; 32, limit bolt; 4, trapezoidal block; 5, wedge-shaped block; 6, screw pair; 61, adjusting screw rod; 62, adjusting nut; 63, holding portion; 7, plate beam; 8, hinge joint. Detailed implementation manners

[0026] In order to make the technical means, creative features, achieved purposes and functions realized by the present utility model clearer and easier to understand, the present utility model will be further described below in conjunction with the attached drawings and specific implementation manners.

[0027] Refer to Figure 1 , a protection device for the old bridge demolition structure disclosed by the present utility model, which is used to cooperate with the outermost slab beam and hinge joint of the old bridge. It includes a U-shaped channel steel 1 that is arranged in a gap on the slab beam, a protection net 2 that is arranged on the U-shaped channel steel 1 and covers the hinge joint, fasteners 3 that are arranged at intervals on the top of the U-shaped channel steel 1, a pair of trapezoidal blocks 4 that are arranged between adjacent two fasteners 3 and symmetrically arranged between the U-shaped channel steel 1 and the slab beam, a wedge block 5 that is inserted between the pair of trapezoidal blocks 4, and a screw pair 6 that is arranged between the U-shaped channel steel 1 and the wedge block 5.

[0028] Preferably, the U-shaped channel steel 1 is set as a No. 12 channel steel, the protection net 2 is adhesively arranged on the U-shaped channel steel 1, the protection net 2 is set as a wire mesh, and the surface of the protection net 2 is arranged opposite to the side surface of the hinge joint and the bottom surface of the slab beam. The adhesive used for bonding the protection net 2 can adopt thermoplastic glue, photo-curing adhesive or two-component epoxy resin, etc. These adhesives have good bonding performance and durability, which can ensure the close combination between the protection net 2 and the U-shaped channel steel 1, so as to provide more stable protection during the old bridge demolition process; in addition, the choice of the adhesive also considers the temperature and humidity conditions of the construction environment to ensure the best bonding effect under different climate conditions. Through such technical measures, the reliability of the protection device and the safety of construction are further improved.

[0029] Refer to Figure 2 , the fastener 3 includes a fixed nut 31 arranged on the top of the U-shaped channel steel 1 and a limit bolt 32 threadedly connected to the fixed nut 31. Among them, the end of the limit bolt 32 extends into the U-shaped channel steel 1 and is arranged opposite to the side surfaces of the trapezoidal block 4 and the wedge block 5, and the end of the limit bolt 32 abuts against the top surface of the slab beam. By pre-rotating the limit bolt 32, the bottom end of the limit bolt 32 abuts against the top surface of the beam slab, so as to reserve space for the installation of the trapezoidal block 4 and the wedge block 5, and at the same time can limit the horizontal movement of the trapezoidal block 4 and the wedge block 5 to ensure the protection stability. At the same time, on the basis of the trapezoidal block 4 and the wedge block 5 being tightly abutted and limited, the fixing of the U-shaped channel steel 1 on the beam slab can be strengthened, so as to ensure that the beam slab will not displace or tilt due to external force during the demolition of the old bridge, improving the safety of construction.

[0030] The screw pair 6 includes an adjusting screw 61 rotatably connected to the wedge block 5, an adjusting nut 62 disposed on the outer wall of the ⌚-shaped channel steel 1, and a gripping portion 63. One end of the adjusting screw 61 passes through the ⌚-shaped channel steel 1 and is threadedly connected to the adjusting nut 62, while the other end is disposed on the gripping portion 63. After the upper trapezoidal block 4, the wedge block 5, and the lower trapezoidal block 4 are stacked and installed between the ⌚-shaped channel steel 1 and the beam plate, the adjusting screw 61 can be rotated to drive the wedge block 5 to move obliquely between the pair of trapezoidal blocks 4, thereby adjusting the stacking height of the wedge block 5 and the trapezoidal block 4 to strengthen the fixation of the ⌚-shaped channel steel 1 to the beam plate.

[0031] The implementation principle of this embodiment is: the protective device can effectively fix the hinged joint concrete blocks generated during the demolition of the old bridge to prevent them from accidentally falling off during the construction process; the design of the protective device takes into account the particularity of the demolition of the old bridge, and ensures the stability and safety of the structure through the protective combination of the U-shaped channel steel 1 and the protective net 2, supplemented by the limiting effect of the fasteners 3, trapezoidal blocks 4, wedge blocks 5 and spiral pairs 6; in addition, the installation process of the device is simple and fast, and does not require complicated construction technology, which greatly improves the construction efficiency and reduces the construction cost at the same time; through actual application, the protective device has been proven to be able to significantly reduce the safety risks during the construction process and provide reliable safety protection for construction personnel and equipment.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A protective device for dismantling an old bridge structure, used to match the outermost plate beam and hinge joint arrangement of the old bridge, characterized by: It includes a C-shaped channel steel (1) sleeved on the plate girder with a gap, a protective net (2) arranged on the C-shaped channel steel (1) and sleeved on the hinge joint, fasteners (3) arranged at intervals on the top of the C-shaped channel steel (1), a pair of trapezoidal blocks (4) arranged between adjacent two fasteners (3) and symmetrically arranged between the C-shaped channel steel (1) and the plate girder, a wedge block (5) inserted between this pair of trapezoidal blocks (4), and a screw pair (6) arranged between the C-shaped channel steel (1) and the wedge block (5).

2. The protective device for demolishing an old bridge structure according to claim 1, characterized in that: The C-shaped channel steel (1) is set as No. 12 channel steel.

3. The protective device for demolishing an old bridge structure according to claim 1, characterized in that: The protective net (2) is adhesively arranged on the C-shaped channel steel (1).

4. The protective device for demolishing an old bridge structure according to claim 1, characterized in that: The protective net (2) is set as a wire mesh, and the surface of the protective net (2) is arranged opposite to the side surface of the hinge joint and the bottom surface of the plate girder.

5. The protective device for demolishing an old bridge structure according to claim 1, characterized in that: The fastener (3) includes a fixing nut (31) arranged on the top of the C-shaped channel steel (1) and a limit bolt (32) threadedly connected to the fixing nut (31). The end of the limit bolt (32) extends into the C-shaped channel steel (1) and is arranged opposite to the side surfaces of the trapezoidal block (4) and the wedge block (5).

6. The protective device for demolishing an old bridge structure according to claim 5, characterized in that: The end of the limit bolt (32) abuts against the top surface of the plate girder.

7. The protective device for demolishing an old bridge structure according to claim 1, characterized in that: The screw pair (6) includes an adjusting screw rod (61) rotatably connected to the wedge block (5) and an adjusting nut (62) arranged on the outer wall of the C-shaped channel steel (1). One end of the adjusting screw rod (61) passes through the C-shaped channel steel (1) and is threadedly connected to the adjusting nut (62).

8. The protective device for demolishing an old bridge structure according to claim 7, characterized in that: The screw pair (6) further includes a gripping part (63) arranged at the other end of the adjusting screw rod (61).

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