A combined splicing construction trestle structure

Abstract

This invention relates to the field of trestle technology, and more particularly to a trestle structure for modular splicing construction, comprising several frame mechanisms spliced ​​sequentially along the front-to-back direction. Each frame mechanism includes two parallel support beams, with several crossbeams fixedly connected between the two support beams. A T-shaped cover is slidably connected to the upper surface of the middle crossbeam, and bridge plates are inserted into the front and rear surfaces of the T-shaped cover, respectively. The bridge plates are laid on the upper surfaces of the support beams and crossbeams. A bent plate is fixedly connected to one end of the T-shaped cover, and a gravity plate is slidably connected to the other end of the T-shaped cover. The bent plate and the gravity plate are respectively close to the two side edges of the bridge plate. This invention adopts a U-shaped sealing and water-blocking structure, with closed-loop protection at the curved edge of the bridge plate, combined with boltless connection, effectively preventing seepage and mud accumulation, preventing silt from squeezing the splicing gap, extending service life, facilitating assembly and disassembly, and significantly improving the efficiency of steel trestle paving and disassembly construction.

Description

Technical Field

[0001] This invention relates to the field of trestle technology, and in particular to a trestle structure constructed by modular splicing. Background Technology

[0002] Steel trestle bridges are widely used in temporary construction projects such as cross-river infrastructure and water-based construction and transportation. On-site, the conventional method is to directly tighten and lock the bridge plates with ordinary high-strength bolts, combined with simple flat pads and simple edge sealing for conventional splicing and reinforcement construction.

[0003] However, the actual working conditions in the field near water are complex and harsh, with the repeated crushing of heavy vehicles, high-frequency scouring of water, and alternating disturbances from wind vibration. The rigid bolts are tightened without buffering and anti-loosening structures, and are subjected to vibration and shear forces for a long time. The bolt preload is lost rapidly, which easily leads to problems such as loose threads, unscrewed nuts, and loose fasteners. This directly undermines the overall rigidity of the bridge deck splicing, causing the deck to shift and the force to become unbalanced. At the same time, the bolt connection holes are only blocked by simple washers, which have a very poor seepage prevention effect. Mud and water can easily seep in along the bolt gaps, quickly corroding the threaded fasteners and the steel component splicing base material, and accelerating the corrosion and aging of the steel structure.

[0004] The gaps between adjacent steel bridge decks were only temporarily sealed on-site with simple filling, resulting in insufficient sealing density and extremely poor resistance to erosion and disturbance. After long-term traffic stress, the sealing layer was prone to cracking and peeling, leading to large-scale seepage of mud and water into the gaps. The continuous accumulation of mud and water would encroach on the load-bearing supports at the bottom of the trestle, forcibly compressing the bridge decks and causing deformation, thus affecting the stability of the decks. Therefore, a modular splicing construction method for the trestle structure was proposed. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of the prior art by proposing a modular splicing construction method for trestle structures.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a trestle structure for combined splicing construction, comprising several frame mechanisms spliced ​​sequentially along the front-back direction, each frame mechanism including two parallel support beams, several crossbeams fixedly connected between the two support beams, a T-shaped cover slidably connected to the upper surface of the middle crossbeam, bridge plates inserted into the front and back surfaces of the T-shaped cover respectively, the bridge plates being laid on the upper surfaces of the support beams and crossbeams, a bending plate fixedly connected to one side of the T-shaped cover, a gravity plate slidably connected to the other side of the T-shaped cover, the bending plate and the gravity plate respectively adhering to the two side edges of the bridge plate, and a positioning mechanism provided between the lower surface of the bending plate and the support beam; The lower surface of the T-shaped cover is fixedly connected with several insert plates. The upper surface of the middle crossbeam is provided with an insertion slot corresponding to the position of each insert plate. The insert plate slides into the inner side of the insertion slot. The side of the insert plate away from the bending plate is provided with a notch. The rear surface of the middle crossbeam is fixedly provided with a fixing block that inserts into the inner side of the notch. The inner top surface of the middle crossbeam is connected with several pressing blocks through an elastic mechanism. The outer surface of the pressing block is provided with a frustum. The insert plate moves horizontally along the inside of the insertion port, the recess disengages from the fixing block, the clamping block enters the recess, and the frustum presses against the lower edge of the recess.

[0007] Preferably, the front and rear ends of the support beam are respectively fixedly connected to the connecting plates, and the two connecting plates between adjacent support beams are fixedly connected.

[0008] Preferably, the inner top surface of the T-shaped cover has two slots, and the sides of the two slots that are far apart have guide surfaces. The upper surface of the bridge plate has raised edges fixedly provided on the front and rear sides, and the raised edges are slidably inserted into the inner side of the slots.

[0009] Preferably, a guide opening is provided through the side surface of the gravity plate, and a T-shaped block is slidably inserted into the inner side of the guide opening, with one end of the T-shaped block fixedly connected to the side surface of the T-shaped cover.

[0010] Preferably, the positioning mechanism includes a connecting plate fixedly connected to the lower surface of the bent plate, a limiting post fixedly connected to the side surface of the support beam near the connecting plate, a sleeve opening on the outer surface of the connecting plate, the sleeve opening slidably fitting onto the outer surface of the limiting post, a sliding groove on the rear surface of the limiting post, a limiting block slidably inserted into the port of the sliding groove, an anti-detachment edge fixedly connected to the front corner of the limiting block, the anti-detachment edge slidingly engaging with the inner side of the sliding groove, a return spring fixedly connected to the front inner wall of the sliding groove, the rear end of the return spring fixedly connected to the front surface of the limiting block, and a pushing surface on the corner of the limiting block away from the connecting plate.

[0011] Preferably, the fixing block has a first chamfer at the corner near the notch, the notch has a second chamfer at the corner near the fixing block, and the lower rear edge of the notch has a chamfer.

[0012] Preferably, the elastic mechanism includes a T-shaped post fixedly connected to the rear surface of the clamping block, the T-shaped post slidingly penetrating the outer surface of the fixed seat, and a compression spring sleeved on the outer surface of the T-shaped post, the compression spring being located between the fixed seat and the clamping block.

[0013] Preferably, a support foot is fixedly connected to the lower surface of the support beam, and a mounting plate is fixedly connected to one side surface of the support beam, away from the side of the T-shaped cover, and a railing bracket is fixedly connected to the side of the mounting plate.

[0014] Compared with the prior art, the present invention has the following beneficial effects: This invention adopts an upper "U" shaped sealing and water-blocking scheme, with the curved edge of the bridge plate embedded with a closed-loop protection, combined with a boltless connection scheme for the bridge plate, to achieve the effect of preventing seepage and mud, avoiding the accumulation of silt and sand that squeezes the splicing gap of the bridge plate, and extending the service life. This invention features boltless and tighten-free assembly, simplifying the on-site splicing and paving process of steel trestle bridge decks. Alignment and installation can be completed by hand, and the bridge decks are immediately positioned after paving to prevent displacement and loosening, thus avoiding the problem of deck displacement deviation during temporary paving. The bridge deck of this invention requires no special tools for disassembly and installation, making the operation simple and labor-saving, and the work process streamlined and efficient, greatly improving the efficiency of on-site paving and disassembly construction of steel trestle bridges. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of a trestle structure for combined splicing construction according to the present invention; Figure 2 This invention relates to a modular splicing construction method for trestle structures. Figure 1 Enlarged view of point A in the middle; Figure 3 This is a partial sectional view of a trestle structure constructed using a modular splicing method according to the present invention. Figure 4 This invention relates to a modular splicing construction method for trestle structures. Figure 3 Enlarged view at point B in the middle; Figure 5 This is a cross-sectional view of the crossbeam and T-shaped cover of a trestle structure constructed by a modular splicing method according to the present invention. Figure 6 This invention relates to a modular splicing construction method for trestle structures. Figure 5 Enlarged view at point C; Figure 7 This is a cross-sectional view of the gravity plate of a trestle structure constructed by combined splicing according to the present invention. Figure 8 This invention relates to a modular splicing construction method for trestle structures. Figure 7 Enlarged view at point D; Figure 9 This is a schematic diagram from below of a trestle structure constructed using a modular splicing method according to the present invention. Figure 10 This invention relates to a modular splicing construction method for trestle structures. Figure 9 Enlarged view at point E in the middle; The components are as follows: 1. Bridge plate; 2. Support beam; 3. Crossbeam; 4. T-shaped cover; 5. Bayonet; 6. Guide surface; 7. Warped edge; 8. Insertion port; 9. Insert plate; 10. Recess; 11. Fixing block; 12. First chamfer; 13. Second chamfer; 14. Bevel; 15. Fixing seat; 16. Pressing block; 17. Frustum; 18. T-shaped column; 19. Compression spring; 20. Bending plate; 21. Connecting plate; 22. Sleeve; 23. Limiting column; 24. Sliding groove; 25. Limiting block; 26. Pushing surface; 27. Anti-detachment edge; 28. Return spring; 29. ​​Butt joint plate; 30. Gravity plate; 31. Guide port; 32. T-shaped block; 33. Mounting plate; 34. Guardrail frame; 35. Support foot. Detailed Implementation

[0016] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0017] like Figures 1-10 The diagram illustrates a modular, spliced ​​trestle structure, comprising several frame mechanisms sequentially spliced ​​along a front-to-back direction. Each frame mechanism includes two parallel support beams 2, with several crossbeams 3 fixedly connected between the two support beams 2. A T-shaped cover 4 is slidably connected to the upper surface of the middle crossbeam 3. Bridge plates 1 are inserted into the front and rear surfaces of the T-shaped cover 4, respectively. The bridge plates 1 are laid on the upper surfaces of the support beams 2 and crossbeams 3. A bent plate 20 is fixedly connected to one end of the T-shaped cover 4, and a gravity plate 30 is slidably connected to the other end of the T-shaped cover 4. The folded plate 20 and gravity plate 30 are respectively attached to the two sides of the bridge deck 1. A positioning mechanism is provided between the lower surface of the folded plate 20 and the support beam 2. The support beam 2 has high overall rigidity and strong bending bearing capacity, mainly bearing the heavy load of traffic on the bridge deck and the vertical construction load. The crossbeams 3 are arranged at equal intervals and reliably welded to form an integral rigid frame, connecting the support beams 2 on both sides to avoid force shift and lateral torsion, and to enhance the overall deformation resistance of the frame structure. This layout scheme of support beams 2 and crossbeams 3 is a commonly used existing scheme, which is stable and reliable. It should be noted that... Figure 1 The diagram only shows a limited number of bridge deck 1, support beam 2, crossbeam 3, etc., and does not limit the complete structure and layout of the entire trestle bridge in actual construction.

[0018] The lower surface of the T-shaped cover 4 is fixedly connected with several insert plates 9. The upper surface of the middle crossbeam 3 is provided with an insertion port 8 corresponding to the position of each insert plate 9. The insert plate 9 slides into the inner side of the insertion port 8. The side of the insert plate 9 away from the bending plate 20 is provided with a notch 10. The rear surface of the middle crossbeam 3 is fixedly provided with a fixing block 11 that inserts into the inner side of the notch 10. The inner top surface of the middle crossbeam 3 is connected with several pressing blocks 16 through an elastic mechanism. The outer surface of the pressing block 16 is provided with a frustum 17. The insert plate 9 moves horizontally along the inside of the insertion port 8, the recess 10 disengages from the fixing block 11, the clamping block 16 enters the recess 10, and the frustum 17 presses against the lower edge of the recess 10.

[0019] The front and rear ends of the support beam 2 are respectively fixedly connected with the butt plate 29. The butt plate 29 is welded to the end of the support beam 2 and the two butt plates 29 between adjacent support beams are fixedly connected. The two butt plates 29 are aligned and fitted together, and then locked with fasteners to achieve a fixed connection, so that each support beam 2 can be precisely connected end to end and the whole is connected. The lower surface of the bridge plate 1 covers the butt connection position, which can effectively prevent rainwater from seeping into the structural connection in the future and play a good waterproof protection role.

[0020] The inner top surface of the T-shaped cover 4 has two slots 5, and the sides of the two slots 5 that are far apart have guide surfaces 6. The front and rear edges of the upper surface of the bridge plate 1 are respectively fixed with upturned edges 7, which slide into the inside of the slots 5. The guide surfaces 6 can guide and facilitate the alignment and insertion of the upturned edges 7.

[0021] A guide opening 31 is provided through the side surface of the gravity plate 30. A T-shaped block 32 is slidably inserted into the inner side of the guide opening 31. One end of the T-shaped block 32 is fixedly connected to the side surface of the T-shaped cover 4. The guide opening 31 has a long strip structure and serves to guide the gravity plate 30 to slide vertically relative to the T-shaped cover 4.

[0022] The positioning mechanism includes a connecting plate 21 fixedly connected to the lower surface of the bent plate 20, and a limiting post 23 fixedly connected to the side surface of the support beam 2 near the connecting plate 21. A sleeve 22 is provided on the outer surface of the connecting plate 21. The sleeve 22 is slidably fitted onto the outer surface of the limiting post 23. The sleeve 22 can realize sliding guidance. The lower end of the sleeve 22 is open, which makes it convenient for the sleeve 22 to be fitted onto the surface of the limiting post 23 when the T-shaped cover 4 is installed. The rear surface of the limiting post 23 is provided with a sliding groove 24. The port of the sliding groove 24 is slidably inserted into the limiting block 25. The front corner of the limiting block 25 is fixedly connected with an anti-detachment edge 27. The anti-detachment edge 27 slides and engages with the inner side of the sliding groove 24 to prevent it from dislodging. The front inner wall of the sliding groove 24 is fixedly connected with a return spring 28. The rear end of the return spring 28 is fixedly connected to the front surface of the limiting block 25. The corner of the limiting block 25 away from the connecting plate 21 is provided with a pushing surface 26 to facilitate force guidance and automatic avoidance of the connecting plate 21 during assembly.

[0023] A first chamfer 12 is provided at the corner of the fixing block 11 near the recess 10, and a second chamfer 13 is provided at the corner of the recess 10 near the fixing block 11. Because the fixing block 11 fits tightly with the inner bottom surface of the recess 10, the first chamfer 12 and the second chamfer 13 can play a guiding role in the assembly process, effectively avoiding interference between the edges and preventing collisions and scratches. A chamfer 14 is provided on the lower rear edge of the recess 10. The chamfer 14 is used to contact and cooperate with the frustum surface 17, which can avoid direct contact and friction of sharp edges and prevent wear and scratches.

[0024] The elastic mechanism includes a T-shaped post 18 fixedly connected to the rear surface of the clamping block 16. The T-shaped post 18 slides through the outer surface of the fixed seat 15. The T-shaped post 18 can slide smoothly along the fixed seat 15, playing a good guiding and limiting role. A compression spring 19 is sleeved on the outer surface of the T-shaped post 18. The compression spring 19 is located between the fixed seat 15 and the clamping block 16, ensuring that the clamping block 16 always remains in a close and pressed state.

[0025] Support legs 35 are fixedly connected to the lower surface of the support beam 2. The support legs 35 have strong load-bearing stability, can evenly distribute the overall load, stably support the entire beam structure, and solidify the bottom support foundation. A mounting plate 33 is fixedly connected to one side surface of the support beam 2, avoiding the side of the T-shaped cover 4. A railing frame 34 is fixedly connected to the side of the mounting plate 33. The mounting plate 33 avoids interference and collision of components, so that the railing frame 34 leaves a sufficient distance from the side of the bridge plate 1. The railing frame 34 is suitable for use with on-site safety protection.

[0026] During assembly, the gravity plate 30 is moved upwards, pressing the limiting block 25 to release it from obstruction of the connecting plate 21. Then, the T-shaped cover 4 is moved laterally to one side, causing the bending plate 20 to move laterally and separate from the side of the supporting beam 2 and the bridge plate 1. During this lateral movement, the insert plate 9 slides along the inside of the insertion port 8, and the recess 10 separates from the fixing block 11. When the insert plate 9 moves laterally, its side presses against the frustum surface 17, causing the clamping block 16 to retract backwards, thus avoiding obstruction of the lateral displacement of the insert plate 9.

[0027] After the horizontal movement is completed, the front end of the clamping block 16 engages with the inside of the recess 10, and the surface of the frustum 17 presses against the chamfered edge 14 on the lower side of the recess 10. Then, the T-shaped cover 4 is lifted upwards. During the upward movement of the T-shaped cover 4, the frustum 17 continuously presses against the chamfered edge 14, applying a downward force to the recess 10. If a single bridge plate 1 needs to be disassembled and replaced, the corresponding bridge plate 1 can be disassembled through the above steps. When installing the bridge plate 1, after the raised edge 7 of the bridge plate 1 enters the slot 5, the T-shaped cover 4 is released. Under the elastic force of the compression spring 18, the frustum 17 presses down on the chamfered edge 14, causing the T-shaped cover 4 to move downwards and reset. Thus, after the initial assembly of the bridge plate 1 is completed, it can achieve good initial positioning and stable limiting effects, temporarily fixing the assembly position of the bridge plate 1, preventing displacement and loosening, completing the initial paving and positioning, and facilitating subsequent positioning steps.

[0028] In subsequent positioning, there is no need to use bolt assemblies for tightening. The T-shaped cover 4 is moved laterally to reset, so that the bending plate 20 is close to the edge of the bridge plate 1 and the crossbeam 3. During the lateral movement, the connecting plate 21 presses against the pushing surface 26, so that the limiting block 25 slides towards the inside of the sliding groove 24. After the connecting plate 21 has moved past, under the elastic force of the reset spring 28, the limiting block 25 moves backward again, achieving the function of limiting the side of the connecting plate 21. After the gravity plate 30 on the other side of the T-shaped cover 4 moves down, the gravity plate 30 limits the edge of the bridge plate 1 and the crossbeam 3 on this side, and cooperates with the bending plate 20 to achieve the purpose of positioning both sides of the bridge plate 1. During this process, when the insert plate 9 moves laterally, the side of the notch 10 first pushes the frustum surface 17, so that the pressing block 16 moves backward. After the lateral movement, the fixing block 11 is inserted into the inside of the notch 10 again, achieving the purpose of limiting the insert plate 9, so as to prevent the T-shaped cover 4 from loosening up and down, and ensure the stability of the structure after installation.

[0029] Because the insert plates 9 on the lower surface of the T-shaped cover 4 are limited by the fixing blocks 11, the tightness of the fit between the T-shaped cover 4 and the surface of the bridge deck 1 after installation can be ensured. Combined with the curved edge 7 inserted into the inside of the snap-fit ​​5, it forms an upper "U"-shaped protective structure, effectively preventing mud and water from seeping into the paving joints of the bridge deck 1. At the same time, the bridge deck 1 can be laid as a whole without bolt reinforcement, avoiding the risk of water seepage from bolt gaps and preventing loosening and displacement of the joints caused by vehicles and pedestrians later on. While ensuring convenient and efficient modular splicing construction, it further guarantees the overall structural strength and long-term durability stability of the bridge deck 1 after paving.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A modular, splicing construction method for a trestle bridge, comprising a plurality of frame mechanisms sequentially spliced ​​along the front-to-back direction, characterized in that: The frame structure includes two parallel support beams (2), and several crossbeams (3) are fixedly connected between the two support beams (2). A T-shaped cover (4) is slidably connected to the upper surface of the middle crossbeam (3). Bridge plates (1) are inserted into the front and rear surfaces of the T-shaped cover (4). The bridge plates (1) are laid on the upper surfaces of the support beams (2) and the crossbeams (3). A bending plate (20) is fixedly connected to one side of the T-shaped cover (4). A gravity plate (30) is slidably connected to the other side of the T-shaped cover (4). The bending plate (20) and the gravity plate (30) are respectively close to the two sides of the bridge plate (1). A positioning mechanism is provided between the lower surface of the bending plate (20) and the support beam (2). The lower surface of the T-shaped cover (4) is fixedly connected with several insert plates (9). The upper surface of the middle crossbeam (3) is provided with a socket (8) corresponding to the position of each insert plate (9). The insert plate (9) slides into the inner side of the socket (8). The side of the insert plate (9) away from the bending plate (20) is provided with a notch (10). The rear surface of the middle crossbeam (3) is fixedly provided with a fixing block (11) that inserts into the inner side of the notch (10). The inner top surface of the middle crossbeam (3) is connected with several pressing blocks (16) through an elastic mechanism. The outer surface of the pressing block (16) is provided with a frustum (17). The insert plate (9) moves horizontally along the inside of the insertion port (8), the recess (10) disengages from the fixing block (11), the pressing block (16) enters the recess (10), and the frustum (17) presses against the lower edge of the recess (10).

2. The trestle structure for modular splicing construction according to claim 1, characterized in that: The front and rear ends of the support beam (2) are respectively fixedly connected to the docking plate (29), and the two docking plates (29) between adjacent support beams (2) are fixedly connected.

3. The trestle structure for modular splicing construction according to claim 1, characterized in that: The inner top surface of the T-shaped cover (4) has two slots (5), and the two slots (5) are respectively provided with guide surfaces (6) on the side away from each other. The front and rear sides of the upper surface of the bridge plate (1) are respectively fixed with curved edges (7), and the curved edges (7) are slidably inserted into the inner side of the slots (5).

4. The trestle structure for modular splicing construction according to claim 1, characterized in that: The gravity plate (30) has a through opening (31) on its side surface. A T-shaped block (32) is slidably inserted into the inside of the through opening (31). One end of the T-shaped block (32) is fixedly connected to the side surface of the T-shaped cover (4).

5. A trestle structure for modular splicing construction according to claim 1, characterized in that: The positioning mechanism includes a connecting plate (21) fixedly connected to the lower surface of the bending plate (20), a limiting post (23) fixedly connected to the side surface of the support beam (2) near the connecting plate (21), a sleeve (22) is provided on the outer surface of the connecting plate (21), the sleeve (22) is slidably fitted on the outer surface of the limiting post (23), a sliding groove (24) is provided on the rear surface of the limiting post (23), a limiting block (25) is slidably inserted into the port of the sliding groove (24), an anti-detachment edge (27) is fixedly connected at the front corner of the limiting block (25), the anti-detachment edge (27) slides with the inner side of the sliding groove (24), a return spring (28) is fixedly connected to the front inner wall of the sliding groove (24), the rear end of the return spring (28) is fixedly connected to the front surface of the limiting block (25), and a pushing surface (26) is provided at the corner of the limiting block (25) away from the connecting plate (21).

6. A trestle structure for modular splicing construction according to claim 1, characterized in that: The fixing block (11) has a first chamfer (12) at the corner of the side near the notch (10), the notch (10) has a second chamfer (13) at the corner of the side near the fixing block (11), and the lower rear edge of the notch (10) has a chamfer (14).

7. A trestle structure for modular splicing construction according to claim 1, characterized in that: The elastic mechanism includes a T-shaped post (18) fixedly connected to the rear surface of the clamping block (16). The T-shaped post (18) slides through the outer surface of the fixed seat (15). A compression spring (19) is sleeved on the outer surface of the T-shaped post (18). The compression spring (19) is located between the fixed seat (15) and the clamping block (16).

8. A trestle structure for modular splicing construction according to claim 1, characterized in that: The lower surface of the support beam (2) is fixedly connected to a support foot (35), and a mounting plate (33) is fixedly connected to one side surface of the support beam (2) away from the side of the T-shaped cover (4). A railing frame (34) is fixedly connected to the side of the mounting plate (33).

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