Supporting device for road and bridge construction

Abstract

The utility model belongs to the technical field of supporting devices, particularly relates to a supporting device for road bridge construction, and aims to solve the problem that the stability of the whole construction structure is not improved due to low connection stability between an upper support and a contact surface as well as between a lower support and the contact surface because a common bridge unloading block is directly placed for use. Comprising two trapezoid supports which are longitudinally and symmetrically arranged, two trapezoid push blocks which are used in a matched mode are transversely and symmetrically arranged between the two trapezoid supports, a reinforcing plate is welded and fixed to the supporting faces of the trapezoid supports, threaded holes are formed in the four corners of the reinforcing plate, and corresponding bolts are connected into the threaded holes in a threaded mode. When the bridge unloading block is used, due to the design of the reinforcing plates and the bolts, the trapezoid support is tightly connected with the contact surface, the problem that the connection stability of an upper support and a lower support of an existing bridge unloading block and the contact surface is not high is solved, and the stability of the whole construction structure can be improved.

Description

Technical Field

[0001] This utility model relates to the field of support device technology, and in particular to a support device for road and bridge construction. Background Technology

[0002] Support devices for road and bridge construction are important equipment to ensure the stability and safety of bridge structures during construction. Among them, bridge unloading blocks are important devices used in the field of bridge construction to realize load transfer, support unloading, and elevation adjustment.

[0003] Bridge slab unloading blocks enable the smooth unloading of bridge beams during the bridge erection phase through height adjustability and stable load-bearing capacity. Currently, the commonly used bridge slab unloading blocks are placed directly, resulting in low stability of the connection between the upper and lower supports and the contact surface, which is not conducive to improving the overall stability of the construction structure.

[0004] To address the aforementioned problems, this utility model document proposes a support device for road and bridge construction. Utility Model Content

[0005] This utility model provides a support device for road and bridge construction, which solves the shortcomings of the existing technology where bridge unloading blocks are directly placed and used, resulting in low stability of the connection between the upper and lower supports and the contact surface, thus hindering the improvement of the overall construction structure stability.

[0006] This utility model provides the following technical solution:

[0007] A support device for road and bridge construction, comprising:

[0008] Two trapezoidal supports are arranged symmetrically in the longitudinal direction. Two trapezoidal push blocks are arranged symmetrically in the transverse direction between the two trapezoidal supports. A reinforcing plate is welded and fixed to the supporting surface of the trapezoidal support. Threaded holes are provided at the four corners of the reinforcing plate. Corresponding bolts are threaded into the threaded holes. Multiple triangular plates for reinforcement are welded and fixed between the included angle of the trapezoidal support and the reinforcing plate.

[0009] In one possible design, a first through hole is provided in the center of each of the two trapezoidal push blocks, and a first screw is provided through the two first through holes. Both ends of the first screw are threaded with a first nut for locking.

[0010] In one possible design, fixing blocks are welded to both sides of the trapezoidal support, and a second through hole is provided in the center of the fixing block. A second screw is provided between the two longitudinally parallel second through holes, and the two ends of the second screw are threaded to a second nut for locking.

[0011] In one possible design, the bolt end has a central hexagonal recess.

[0012] In one possible design, the bolt is fitted with a washer ring for anti-slip purposes.

[0013] In one possible design, both sides of the reinforcing plate are provided with notches to avoid affecting the installation and removal of the second screw.

[0014] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit the present invention.

[0015] The working principle and usage process of this technical solution are as follows:

[0016] During installation, clean the construction surface to ensure that the flatness error is ≤3mm / 2m; pre-embed M24 chemical anchors (depth ≥300mm, tensile strength ≥65kN), with a positioning deviation ≤5mm; then hoist the trapezoidal support to the predetermined position, so that the reinforcement plate is completely attached to the base surface; initially tighten the diagonal bolts to 50N·m; after calibrating the levelness of the support (error ≤0.1%), finally tighten them to 350N·m;

[0017] Then, the trapezoidal push block is embedded between the supports, ensuring that the coaxiality deviation of the first through hole is ≤0.3mm, and the first screw is inserted. The first nuts are screwed into both ends until they are hand-tight. The distance between the push blocks is monitored by a laser rangefinder, and the position of the nuts is dynamically adjusted to make the contact pressure at the bottom of the beam evenly distributed (standard deviation ≤0.05MPa). Simultaneously, the same second screw is inserted into the second through hole in the center of the fixed block welded on both sides of the trapezoidal support, and the second nuts are threaded to both ends of the second screw for locking. The preload is applied to the preset value (the torque is controlled by a hydraulic wrench, with an accuracy of ±5%).

[0018] This utility model has the following beneficial effects:

[0019] This utility model, through the design of reinforcing plates and bolts, ensures a tight connection between the trapezoidal support and the contact surface, solving the problem of low stability in the connection between the upper and lower supports and the contact surface of existing bridge unloading blocks, and thus improving the overall stability of the construction structure.

[0020] In this invention, multiple triangular plates welded between the trapezoidal support and the reinforcing plate further strengthen the support structure, improve the load-bearing capacity of the device, and enable it to better withstand the loads during road and bridge construction.

[0021] This utility model uses a connection method of screw and nut, as well as the cooperation of bolt and threaded hole, which facilitates the installation and disassembly operations of construction personnel and improves construction efficiency; the notches set on both sides of the reinforcing plate avoid interference when installing and disassembling the second screw, making the operation smoother. Attached Figure Description

[0022] Figure 1 A three-dimensional structural schematic diagram of a support device for road and bridge construction provided in an embodiment of this utility model;

[0023] Figure 2 Another structural schematic diagram of a road and bridge construction support device provided in an embodiment of this utility model;

[0024] Figure 3 A schematic diagram of the disassembly structure of a support device for road and bridge construction provided in an embodiment of this utility model;

[0025] Figure 4 This is a schematic diagram of the bolt and reinforcing plate separation structure of a support device for road and bridge construction provided in an embodiment of the present utility model.

[0026] Reference numerals in the attached drawings: 1. Trapezoidal support; 2. Trapezoidal push block; 3. First screw; 4. First nut; 5. Fixing block; 6. Second screw; 7. Second nut; 8. First through hole; 9. Second through hole; 10. Reinforcing plate; 11. Triangular plate; 12. Bolt; 13. Threaded hole; 14. Internal hexagonal groove; 15. Washer ring; 16. Notch. Detailed Implementation

[0027] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0028] In the description of this utility model, it should be understood that the terms "opening", "upper", "middle", "length", "inner", etc., which indicate orientation or positional relationship, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0029] To keep the following description of the embodiments of this utility model clear and concise, detailed descriptions of known functions and known components are omitted.

[0030] Example 1

[0031] Please refer to Figure 1-4 A support device, comprising:

[0032] Two trapezoidal supports 1 are arranged symmetrically in the longitudinal direction. The trapezoidal supports are made of Q345B low carbon alloy steel and their slope is designed to be 1:5 (vertical height to horizontal width ratio) to ensure uniform load distribution. Two trapezoidal push blocks 2 are arranged symmetrically in the transverse direction between the two trapezoidal supports 1 to form a stable quadrilateral support frame. Through the coordinated cooperation of each component, a stable and reliable support effect is achieved. Each of the two trapezoidal push blocks 2 has a first through hole 8 in the center. The same first screw 3 is installed between the two first through holes 8. The first screw 3 adopts a trapezoidal thread design with a pitch of 8mm and passes through the first through hole 8 of the two trapezoidal push blocks 2. The screw surface is chrome plated and the friction coefficient μ=0.12 to ensure smooth adjustment. Both ends of the first screw 3 are threaded with a first nut 4 for locking. The distance between the push blocks 2 can be adjusted laterally by screwing in / out the first nut 4, with an adjustment accuracy of 0.5mm.

[0033] Both sides of the trapezoidal support 1 are welded and fixed with fixing blocks 5. A second through hole 9 is provided in the center of the fixing block 5. The same second screw 6 is installed between the two longitudinally parallel second through holes 9. Both ends of the second screw 6 are threaded with second nuts 7 for locking. The function of the second screw 6 and the second nut 7 is to connect the two trapezoidal supports 1 together and increase the overall stability of the support device.

[0034] The support surface of the trapezoidal support 1 is welded with a 5mm thick reinforcing plate 10. The weld uses ER50-6 welding wire to meet the construction needs in northern regions. The reinforcing plate 10 is 100mm larger than the bottom surface of the support. Threaded holes 13 are provided at the four corners of the reinforcing plate 10. The threaded holes 13 are connected to corresponding bolts 12. 8.8 grade high-strength bolts 12 are used. The ends of the bolts are provided with internal hexagonal grooves 14, which, together with nylon anti-loosening washers and spring washers 15, form a triple anti-loosening system. The torque value is controlled at 350 N·m during installation to ensure that the bolts do not loosen during long-term service. The bolts 12 are connected to the construction base anchors through the M24 threaded holes 13 at the four corners, significantly improving the device's anti-overturning ability.

[0035] At the angle between the trapezoidal support 1 and the reinforcing plate 10, multiple triangular plates 11 are welded, each 8 mm thick, and evenly spaced at 200 mm intervals, to reduce the local stress concentration factor of the support.

[0036] This application can be used for road and bridge construction, as well as other fields applicable to this application.

[0037] Example 2

[0038] Improvements based on Example 1:

[0039] A support device for road and bridge construction, which is used in the field of support devices;

[0040] Please refer to Figure 2-3 Both sides of the reinforcing plate 10 are provided with notches 16 to avoid affecting the installation and disassembly of the second screw 6. The position of the notches corresponds to the axis of the second screw 6. This design allows the reinforcing plate 10 to maintain structural strength while leaving operating space for screw installation tools. The edges of the notches 16 can be chamfered with C1.5 to prevent stress concentration.

[0041] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0042] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. In the absence of conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A support device for road and bridge construction, characterized in that, include: Two trapezoidal supports (1) are arranged symmetrically in the longitudinal direction. Two trapezoidal push blocks (2) are arranged symmetrically in the transverse direction between the two trapezoidal supports (1). A reinforcing plate (10) is welded and fixed to the supporting surface of the trapezoidal support (1). Threaded holes (13) are provided at the four corners of the reinforcing plate (10). Corresponding bolts (12) are threaded into the threaded holes (13). Multiple triangular plates (11) for reinforcement are welded and fixed between the included angle of the trapezoidal support (1) and the reinforcing plate (10).

2. The support device for road and bridge construction according to claim 1, characterized in that, Each of the two trapezoidal push blocks (2) has a first through hole (8) in the center, and the same first screw (3) is provided between the two first through holes (8). Both ends of the first screw (3) are threaded with a first nut (4) for locking.

3. The support device for road and bridge construction according to claim 1, characterized in that, The trapezoidal support (1) has a fixing block (5) welded and fixed on both sides. The fixing block (5) has a second through hole (9) in the center. The same second screw (6) is installed between the two longitudinally parallel second through holes (9). The two ends of the second screw (6) are threaded to a second nut (7) for locking.

4. A support device for road and bridge construction according to claim 1, characterized in that, The bolt (12) has an internal hexagonal groove (14) at the center of its end.

5. A support device for road and bridge construction according to claim 1, characterized in that, The bolt (12) is fitted with a washer (15) for anti-slip purposes.

6. A support device for road and bridge construction according to claim 3, characterized in that, Both sides of the reinforcing plate (10) are provided with notches (16) to avoid affecting the installation and disassembly of the second screw (6).

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