An easy-to-assemble and disassemble bridge construction slab

Abstract

This application discloses an easy-to-assemble and disassemble bridge construction unloading block, belonging to the technical field of bridge construction equipment. It includes an upper support, a lower support, left and right side supports, and tie rods. The left and right side supports are both composed of upper and lower modules. The inner and outer sides of both the upper and lower modules are vertically arranged. The inclination angle of the lower module's bottom surface is the same as the inclination angle of the lower support's side wall. One side of the upper top surface is an upward-facing inclined contact surface, and the other side is a horizontal bearing surface. A first blocking structure is provided between the lower module's bottom surface and the lower support's side wall. The inclination angle of the upper module's top surface is the same as the inclination angle of the upper support's side wall, and the shape of the lower bottom surface matches the shape of the lower module's top surface. Tie rods are inserted between the upper modules. A pin is inserted between the lower and upper modules to limit their relative movement. This design transfers the pressure on the upper support to the horizontal bearing surface, reducing the stress on the tie rods and lowering the probability of deformation, making the subsequent disassembly of the unloading block faster and more efficient.

Description

Technical Field

[0001] This application belongs to the technical field of bridge construction equipment and relates to a bridge construction unloading block that is easy to assemble and disassemble. Background Technology

[0002] Bridge support blocks are tools used for adjusting the elevation and lowering of bridge supports. They mainly consist of an upper support, a lower support, left and right side supports, and tie rods. Each component of the support block typically features an isosceles trapezoidal cross-section to enhance shear resistance. In use, the upper support is in direct contact with the main bridge beam, the lower support is fixed to a temporary support, and the left and right side supports are adjusted in height via a sliding fit (achieved by rotating the nuts on the tie rods). The cross-section of the left and right side supports is often designed as an isosceles trapezoid, effectively distributing the load from the upper support and improving the structure's load-bearing capacity. Furthermore, support blocks are mostly welded from high-strength steel plates, possessing excellent mechanical properties and capable of withstanding various loads during bridge construction, such as the bridge's own weight, the weight of construction materials, and the weight of the load-bearing vehicles.

[0003] Analysis of existing ballast block structures reveals that most of the load during bridge construction is transferred to the left and right side supports via the upper support. These side supports are then fixed in position via connecting tie rods. In short, the tie rods are the core components that maintain the stability of the ballast block structure and provide reliable support. During construction, to allow the ballast block to withstand higher loads, multiple tie rods are typically used.

[0004] In practical applications, it has been found that existing bridge support blocks are difficult to dismantle in the later stages of construction. The main reason is that most of the force on the support of the support block is transferred to the tie rods, causing slight deformation between the tie rods and the nuts, which affects the rotation of the nuts. If the load far exceeds expectations, the tie rods may be stretched or even break due to excessive stress, causing the bridge support elevation error to exceed the threshold.

[0005] Clearly, the key to further improving the structural stability of the detachment block, making it easy to disassemble and reassemble, and enabling its reuse is to reduce the stress on the tie rod while maintaining the structural strength and load-bearing capacity of the detachment block. Summary of the Invention

[0006] To address the problem in practical applications where the stress on the support of the slab unloading block is largely transferred to the tie rod, leading to tensile deformation of the tie rod and affecting the dismantling efficiency and structural stability of the slab unloading block, this application provides a bridge construction slab unloading block that is easy to assemble and disassemble. While ensuring the structural strength and load-bearing stability of the slab unloading block, it reduces the stress on the tie rod, lowers the probability of deformation during use, and improves the dismantling speed and the possibility of reuse. The specific technical solution adopted is as follows: A bridge construction unloading block that is easy to assemble and disassemble includes an upper support, a lower support, left and right side supports and tie rods. The cross sections of the upper support, the lower support and the left and right side supports are all trapezoidal. The left and right side supports are all spliced ​​together by upper modules and lower modules. The lower module has both its inner and outer sides set vertically. The inclination angle of the lower bottom surface is the same as that of the side wall of the lower support. The upper top surface is set as an inclined contact surface with an upward inclination on the side closer to the inner side and as a horizontal bearing surface on the side away from the inner side. A first blocking structure is provided between the lower bottom surface of the lower module and the side wall of the lower support to prevent the relative sliding of the two. The inner and outer sides of the upper module are both vertically arranged, the inclination angle of the upper top surface is the same as the inclination angle of the side wall of the upper support, and the shape and angle of the lower bottom surface are adapted to the shape and angle of the upper top surface of the lower module. The tie rod passes between the upper modules of the left and right side supports; The lower module has a slot on its horizontal bearing surface, and the upper module has a hole on its bottom surface that mates with the slot. A pin is inserted between the hole and the slot to limit their relative movement.

[0007] Through the above technical solution, after the unloading block is installed, the pressure on the upper support will be transmitted to the left and right side supports, forming two component forces in the horizontal and vertical directions of the left and right side supports. The horizontal force ultimately acts on the tie rod, while the vertical force acts on the horizontal bearing surface of the lower module. This greatly reduces the stress on the tie rod and lowers the probability of deformation due to stress, making the disassembly of the unloading block faster and more efficient. The force on the horizontal bearing surface of the lower module further acts on the side wall of the lower support. Due to the first blocking structure set between the lower module and the side wall of the lower support, the downward pressure on the lower module is converted into the lateral extrusion force on the first blocking structure on the side wall of the lower support. This ultimately reduces the stress on the tie rod as a whole, while ensuring the stability of the overall unloading block structure. Finally, when disassembling the unloading block, it is only necessary to pull out the pin, loosen the nut in the tie rod, and move the upper module horizontally. This is convenient and quick, and will not be affected by the deformation of the tie rod or the upper and lower modules.

[0008] Furthermore, both the upper and lower modules are welded from steel plates and each includes an outer peripheral plate and reinforcing plates arranged in a crisscross pattern within the outer peripheral plate. The horizontal pressure-bearing surface on the lower module is integrally set on the outer peripheral plate of the lower module; A placement guide for placing a pin is integrally provided on the outer peripheral plate of the upper module, located on the outer peripheral side of the insertion hole. Multiple reinforcing ribs are provided between the outer wall of the placement guide and the outer peripheral plate of the upper module.

[0009] The above technical solution can ensure the structural strength of the upper and lower modules. At the same time, when the pin passes through the hole and is inserted into the slot, it is not easy to fall out of the slot due to external factors such as vibration, thus ensuring the stability of the connection between the upper and lower modules.

[0010] Furthermore, the first blocking structure includes interlocking transverse ridges disposed on the bottom surface of the lower module and the side wall of the lower support.

[0011] With the above technical solution, when the upper module transmits pressure to the lower module, the lower module is less likely to slip, thereby reducing the lateral pressure on the pin itself, reducing the probability of deformation of the pin body, and transmitting more pressure to the lower support to ensure the structural stability of the entire unloading block.

[0012] Furthermore, the lower module has arc-shaped protrusions perpendicular to the inner side on its horizontal bearing surface and inclined contact surface, and the upper module has arc-shaped grooves corresponding to the arc-shaped protrusions on its lower bottom surface. The outer edge of the horizontal bearing surface of the outer peripheral plate away from the inner side of the lower module is provided with a chamfer.

[0013] Through the above technical solution, when the upper module and the lower module are in the splicing state, the arc-shaped bulge and the groove cooperate to prevent lateral displacement between the upper module and the lower module. By setting the chamfer, the contact area between the horizontal surface of the outer peripheral plate of the upper module and the horizontal bearing surface of the lower module can be reduced, thereby reducing the horizontal frictional resistance between the upper module and the lower module when disassembling and unloading the blocks. At the same time, when the upper module and the lower module slide, the arc-shaped bulge and the groove cooperate to play a guiding role.

[0014] Furthermore, a second blocking structure is provided between the inclined contact surface of the lower module and the bottom surface of the upper module to prevent the two from sliding relative to each other along the contact surface.

[0015] Through the above technical solution, when the pressure of the upper module is applied to the lower module, the second blocking structure can provide resistance to prevent the upper module from sliding outward in the horizontal direction, thereby reducing the force exerted by the upper module on the tie rod and the pin, making the structure of the unloading block more stable.

[0016] Furthermore, the inclined contact surface is parallel to the bottom surface of the lower module.

[0017] The above technical solutions help to improve the structural strength of the lower outer peripheral plate of the lower module.

[0018] Furthermore, the number of slots, holes, and pins is multiple and they are distributed laterally along the outer perimeter plates of the upper and lower modules.

[0019] The above technical solutions can improve the splicing strength between the upper and lower modules and enhance the load-bearing capacity of the unloading blocks.

[0020] Furthermore, at least one oil injection hole is provided through the surface of the upper module's outer peripheral plate that contacts the lower module.

[0021] The above technical solution allows lubricating oil or rust-preventive oil to be injected into the horizontal bearing surface through the oil injection hole, which helps to reduce the horizontal friction between the upper and lower modules when disassembling and removing the block, thereby improving the efficiency of disassembly.

[0022] Furthermore, the pull holes on the left and right side supports for the pull rods to pass through are provided with reinforcing connecting columns around them. The reinforcing connecting columns are located at the intersection of the reinforcing plates of the left and right side supports and are perpendicular to the inner and outer sides of the left and right side supports.

[0023] Through the above technical solution, the tension of the tie rod can be distributed more evenly to the reinforcing plates of the left and right supports, thus improving the stability of the unloading block structure and its load-bearing capacity.

[0024] This application includes at least one of the following beneficial effects: (1) By configuring the left and right side supports as upper and lower modules that complement each other, when the unloading block is installed, the pressure on the upper support will be transmitted to the left and right side supports, forming two component forces in the horizontal and vertical directions of the left and right side supports. The horizontal force is ultimately applied to the tie rod, while the vertical force is applied to the horizontal bearing surface of the lower module. This greatly reduces the stress on the tie rod and reduces the probability of deformation due to stress, making the disassembly of the unloading block faster and more efficient in the later stage. (2) By setting a first blocking structure between the lower module and the side wall of the lower support, the downward pressure on the lower module is converted into the lateral extrusion force on the first blocking structure on the side wall of the lower support, which ultimately reduces the force on the tie rod as a whole, while ensuring the stability of the strength of the entire unloading block structure. (3) When disassembling the unloading block, simply pull out the pin, loosen the nut in the tie rod, and move the upper module to lower the height of the upper support. This is convenient and quick, and will not be affected by the deformation of the tie rod or the upper and lower modules. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the unloading block in this application; Figure 2 This is a schematic diagram of the left and right side supports.

[0026] Reference numerals: 1. Upper support; 2. Lower support; 3. Left and right side supports; 4. Tie rod; 5. Nut; 6. Rod body; 7. Upper module; 8. Lower module; 9. Inclined contact surface; 10. Horizontal bearing surface; 11. Pin; 12. Outer peripheral plate. Detailed Implementation

[0027] The embodiments of this application are described in detail below, and examples of the embodiments are shown in the accompanying drawings.

[0028] In the description of this specification, the references to "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples" refer to specific features, structures, materials, or characteristics described in connection with the described embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0029] A type of easily assembled and disassembled bridge construction slab, such as... Figure 1 As shown, it includes an upper support 1, a lower support 2, left and right side supports 3, and a tie rod 4. The cross-sections of the upper support 1, the lower support 2, and the left and right side supports 3 are all trapezoidal. In the embodiments of this application, the upper support 1, the lower support 2, and the left and right side supports 3 are all welded from high-strength steel plates. In certain embodiments, they can be directly cast.

[0030] The tie rod 4 includes a rod body 6 and hexagonal nuts 5 at both ends of the rod body 6. The threads at both ends of the rod body 6 are arranged in opposite directions, so the height of the upper support 1 can be raised or lowered simply by rotating the nuts 5 in the same direction.

[0031] In the embodiments of this application, such as Figure 2 As shown, both the left and right side supports 3 are composed of upper module 7 and lower module 8 spliced ​​together.

[0032] Combination Figure 2As shown, the inner and outer sides of the lower module 8 are both vertically arranged, and the inclination angle of the lower bottom surface is the same as the inclination angle of the side wall of the lower support 2. The upper top surface of the lower module 8 is set as an inclined contact surface 9 with an upward inclination on the side closer to the inner side, and a horizontal bearing surface 10 on the side farther from the inner side. Optimally, to help improve the structural strength of the lower module 8, the inclined contact surface 9 is parallel to the lower bottom surface of the lower module 8. The inner and outer sides of the upper module 7 are both vertically arranged, and the inclination angle of the upper top surface is the same as the inclination angle of the side wall of the upper support 1. The shape angle of the lower bottom surface is adapted to the shape angle of the upper top surface of the lower module 8. The tie rod 4 passes between the upper modules 7 of the left and right side supports 3. A slot is opened on the horizontal bearing surface 10 of the lower module 8, and a insertion hole that mates with the slot is opened on the lower bottom surface of the upper module 7. A pin 11 is inserted between the insertion hole and the slot to limit the relative movement of the two.

[0033] Based on the above structure, after the unloading block is installed, the pressure on the upper support 1 will be transmitted to the left and right side supports 3, forming two component forces in the horizontal and vertical directions of the left and right side supports 3. The horizontal force ultimately acts on the tie rod 4, while the vertical force acts on the horizontal bearing surface 10 of the lower module 8. This greatly reduces the stress on the tie rod 4 and lowers the probability of it deforming due to stress, making the disassembly of the unloading block faster and more efficient in the later stage.

[0034] Combination Figure 2 As shown, after the unloading block is installed, the pressure of the upper support 1 is mainly transmitted to the lower module 8. The force on the horizontal bearing surface 10 of the lower module 8 is further applied to the side wall of the lower support 2. In order to convert more of the downward pressure on the lower module 8 into the lateral extrusion force on the side wall of the lower support 2, the force on the tie rod 4 is reduced as a whole, while ensuring the stability of the overall unloading block structure. A first blocking structure is provided between the bottom surface of the lower module 8 and the side wall of the lower support 2 to prevent the relative sliding of the two. In detail, the first blocking structure includes interlocking transverse ridges on the bottom surface of the lower module 8 and the side wall of the lower support 2. The transverse ridges increase the resistance to lateral sliding between the lower module 8 and the lower support 2. When the upper module 7 transmits pressure to the lower module 8, the lower module 8 is less likely to slide sideways, thereby reducing the transverse pressure on the pin 11 itself and the longitudinal pressure on the horizontal bearing surface 10, reducing the probability of deformation of the pin 11 body and the horizontal bearing surface 10, and transmitting more pressure to the lower support 2 to ensure the structural stability of the entire unloading block.

[0035] A second blocking structure is provided between the inclined contact surface 9 of the lower module 8 and the bottom surface of the upper module 7 to prevent relative sliding between the two along the contact surface. In practical applications, the above-mentioned second blocking structure can also be configured as transverse ridges to increase the lateral sliding resistance between the upper module 7 and the lower module 8. Based on the above technical solution, when the pressure of the upper module 7 acts on the lower module 8, the above-mentioned second blocking structure can provide resistance to prevent the upper module 7 from sliding outward in the horizontal direction, thereby reducing the force of the upper module 7 acting on the tie rod 4 and the pin 11 (part of the pressure is transferred to the upper surface of each transverse ridge), making the structure of the unloading block more stable.

[0036] In this embodiment, both the upper module 7 and the lower module 8 include an outer peripheral plate 12 and reinforcing plates welded in a crisscross pattern within the outer peripheral plate 12. A horizontal bearing surface 10 is integrally formed on the outer peripheral plate 12 of the lower module 8. An integrally formed placement guide for placing the pin 11 is provided on the outer peripheral plate 12 of the upper module 7, located on the outer periphery of the insertion hole. Multiple reinforcing ribs are provided between the outer wall of the placement guide and the outer peripheral plate 12 of the upper module 7. Through the above technical solution, the structural strength of the upper module 7 and the lower module 8 can be guaranteed. Furthermore, when the pin 11 passes through the insertion hole and is inserted into the slot, it is not easily dislodged from the slot due to external factors such as vibration. The pin 11 body is supported and protected by the placement guide, and is not easily deformed, ensuring the stability of the connection between the upper module 7 and the lower module 8.

[0037] Combination Figure 2 As shown, the lower module 8 has arc-shaped protrusions perpendicular to its inner surface on its horizontal bearing surface 10 and inclined contact surface 9. The lower bottom surface of the upper module 7 has an arc-shaped groove corresponding to these protrusions. The outer edge of the outer peripheral plate 12, where the horizontal bearing surface 10 is located, away from the inner surface of the lower module 8, has a chamfered angle. Based on this design, when the upper module 7 and lower module 8 are joined, the arc-shaped protrusions and grooves cooperate to prevent lateral displacement between them. The chamfered angle reduces the contact area between the horizontal surface of the outer peripheral plate 12 of the upper module 7 and the horizontal bearing surface 10 of the lower module 8, thus reducing horizontal frictional resistance between them during disassembly and removal of the unloading block. Simultaneously, when the upper module 7 and lower module 8 slide, the arc-shaped protrusions and grooves act as guides.

[0038] In order to reduce the horizontal friction between the upper and lower modules 8 when disassembling the unloading block and improve the disassembly efficiency, the outer peripheral plate 12 of the upper module 7 is optimized to have at least one oil injection hole through the side that contacts the horizontal bearing surface 10, such as the side that contacts the horizontal bearing surface 10. When disassembling or installing the unloading block, lubricating oil or rust-preventive oil can be injected into the horizontal bearing surface 10 through the oil injection hole.

[0039] The number of slots, sockets and pins 11 is multiple and they are distributed laterally along the outer periphery plate 12 of the upper module 7 and the lower module 8, which can improve the splicing strength between the upper module 7 and the lower module 8 and improve the load-bearing capacity of the unloading block.

[0040] In order to make the force on the left and right side supports 3 more even, and to improve the stability and load-bearing strength of the unloading block structure, the pull holes opened on the left and right side supports 3 for the tie rods 4 to pass through are provided with reinforcing connecting columns around them. The reinforcing connecting columns are located at the intersection of the reinforcing plates of the left and right side supports 3 and are perpendicular to the inner and outer sides of the left and right side supports 3.

[0041] The working principle and beneficial effects of this application are as follows: When installing the drop block, adjust the nut on the tie rod 4 according to the required elevation, thereby causing the left and right supports 3 to move towards each other (raising the height of the upper support 1) or away from each other (lowering the height of the upper support 1). Once the height of the upper support 1 reaches the set requirement, fix the nut. Later, when disassembling the drop block, simply pull out the pin 11, loosen the nut in the tie rod 4, and move the upper module 7 horizontally; it is convenient and quick. Because the pressure on the upper module 7 is mostly transferred from the horizontal bearing surface 10 to the lower module 8, the force on the tie rod 4 is greatly reduced, and the disassembly of the drop block will not be affected by the deformation of the tie rod 4 or the upper and lower modules 8.

[0042] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A detachable bridge construction unloading block, comprising an upper support (1), a lower support (2), left and right side supports (3), and a tensioning screw (4), the upper support (1), the lower support (2), and the left and right side supports (3) each having a trapezoidal cross section, characterized in that, The left and right side supports (3) are both assembled from the upper module (7) and the lower module (8); The inner and outer sides of the lower module (8) are both vertically arranged. The inclination angle of the lower bottom surface is the same as the inclination angle of the side wall of the lower support (2). The upper top surface is set as an inclined contact surface (9) with the side closer to the inner side and a horizontal bearing surface (10) with the side away from the inner side. A first blocking structure is provided between the lower bottom surface of the lower module (8) and the side wall of the lower support (2) to prevent the relative sliding of the two. The inner and outer sides of the upper module (7) are both vertically arranged. The inclination angle of the upper top surface is the same as the inclination angle of the side wall of the upper support (1). The shape angle of the lower bottom surface is adapted to the shape angle of the upper top surface of the lower module (8). The tie rod (4) passes between the upper modules (7) of the left and right side supports (3); The lower module (8) has a slot on its horizontal bearing surface (10), and the lower bottom surface of the upper module (7) has a hole that matches the slot. A pin (11) is inserted between the hole and the slot to limit their relative movement.

2. The easily assembled and disassembled landing block for bridge construction according to claim 1, wherein The upper module (7) and lower module (8) are both welded from steel plates and each includes an outer peripheral plate (12) and reinforcing plates arranged in a crisscross pattern within the outer peripheral plate (12). The horizontal pressure-bearing surface (10) on the lower module (8) is integrally set on the outer peripheral plate (12) of the lower module (8); The upper module (7) outer peripheral plate (12) is integrally provided with a placement guide for placing the pin (11) on the outer peripheral side of the insertion hole, and a plurality of reinforcing ribs are provided between the outer wall of the placement guide and the upper module (7) outer peripheral plate (12).

3. The easily detachable bridge construction unloading block according to claim 1, characterized in that, The first blocking structure includes transverse convex patterns that are interlocked and fitted on the bottom surface of the lower module (8) and the side wall of the lower support (2).

4. The easily detachable bridge construction unloading block according to claim 1, characterized in that, The lower module (8) has arc-shaped protrusions perpendicular to the inner side on its horizontal bearing surface (10) and inclined contact surface (9), and the lower bottom surface of the upper module (7) has arc-shaped grooves corresponding to the arc-shaped protrusions. The outer edge of the outer peripheral plate (12) where the horizontal bearing surface (10) is located is provided with a chamfer on the side away from the inner side of the lower module (8).

5. The easily detachable bridge construction unloading block according to claim 1, characterized in that, A second blocking structure is provided between the inclined contact surface (9) of the lower module (8) and the bottom surface of the upper module (7) to prevent the two from sliding relative to each other along the contact surface.

6. The easily detachable bridge construction unloading block according to claim 1, characterized in that, The inclined contact surface (9) is parallel to the bottom surface of the lower module (8).

7. The easily detachable bridge construction unloading block according to claim 1, characterized in that, The number of slots, holes and pins (11) is multiple and they are distributed laterally along the outer perimeter plate (12) of the upper module (7) and lower module (8).

8. The easily detachable bridge construction unloading block according to claim 1, characterized in that, At least one oil injection hole is provided through the outer peripheral plate (12) of the upper module (7) that contacts the lower module (8).

9. The easily detachable bridge construction unloading block according to claim 1, characterized in that, The pull holes on the left and right side supports (3) through which the tie rods (4) pass are provided with reinforcing connecting columns. The reinforcing connecting columns are located at the intersection of the reinforcing plates of the left and right side supports (3) and are perpendicular to the inner and outer sides of the left and right side supports (3).

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