A seamless UHPC rigid widening structure and method for old bridge

Abstract

The application relates to the technical field of new and old bridge widening, in particular to a new and old bridge seamless UHPC rigid widening structure and method, which comprises a new bridge, the end of the new bridge is provided with an old bridge, a connecting plate, a limiting groove is formed in the surface of the connecting plate, a slot is formed in the surface of the limiting groove, a through hole is formed in the inner wall of the slot, a plug-in rod is inserted into the surface of the connecting plate, the end of the plug-in rod is inserted into the limiting groove, the surface of the plug-in rod is connected with a moving plate and a limiting block, and the moving plate is arranged on the surface; the connecting plate is arranged on the surface of the new bridge and the old bridge, the plug-in rod is arranged in the gap between the new bridge and the old bridge, the roller on the surface of the new bridge and the old bridge is held on the clamping groove arranged on the surface of the plug-in rod, the roller on the surface of the bridge body is held on the surface of the roller in the clamping groove, and when the new bridge or the old bridge bears a load, the connecting plate can slightly swing around the plug-in rod, so that the connecting plate will not be cracked.

Description

Technical Field

[0001] This invention relates to the field of bridge widening technology, specifically to a seamless UHPC rigid widening structure and method for bridges. Background Technology

[0002] With economic and social development and increased traffic volume, the width of some existing bridges can no longer meet people's current requirements for high-quality passage, and it is necessary to widen and renovate the existing old bridges.

[0003] The handling of the longitudinal splicing joints between new and old bridges is one of the key issues in bridge widening. Due to the differences in span, structural form, load, and usage environment between the new and old bridges, the longitudinal splicing joints are weak and prone to stress concentration and significant differential settlement, leading to damage at the splicing joints.

[0004] Currently, the commonly used splicing methods are mainly divided into splicing with seams and splicing without seams.

[0005] One method of widening the bridge by installing expansion joints can solve the problems of stress and functionality, but the overall integrity of the bridge after construction is poor, there are large gaps in the road surface, which affects the aesthetics and makes it prone to water leakage; it also affects the structural durability; and the maintenance cost of the expansion joint joint is high in the later stage.

[0006] Seamless splicing methods usually include: (1) conventional rigid splicing, which may crack, has a large impact on later maintenance, and has a long construction period; (2) splicing with new materials for seamless expansion joints, which has a complex structure, is difficult to construct, has poor durability, high cost, and high maintenance costs. Summary of the Invention

[0007] The purpose of this invention is to provide a seamless UHPC rigid splicing structure and method for new and old bridges to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a seamless UHPC rigid splicing structure for new and old bridges, comprising: a new bridge, with an old bridge at one end; a connecting plate, the surface of which has a limiting groove, the surface of which has an opening, and the inner wall of which has a through hole; a connecting rod inserted into the surface of the connecting plate, the end of which is inserted into the limiting groove, and a movable plate connected to the surface of the connecting rod; and a limiting block disposed on the surface of the movable plate.

[0009] Preferably, there is a gap between the new bridge and the old bridge, a connecting plate is located on the surface of the new bridge and the old bridge, a plug strip is fixed on the surface of the connecting plate, the plug strip is inserted into the gap between the new bridge and the old bridge, a slot is opened on the surface of the connecting plate, a roller is provided inside the slot, the roller can rotate inside the slot, a rotating shaft is provided on the surface of the new bridge and the old bridge, the rotating shaft is located at the end of the new bridge and the old bridge, and the rotating shaft at the end of the new bridge and the old bridge is inserted into the slot.

[0010] Preferably, the rotating shafts at the ends of the new bridge and the old bridge are supported on the surface of the roller, and the rotating shaft drives the roller to rotate. The plug rod is inserted into the surface of the connecting plate, and the plug rod can move on the surface of the connecting plate. The end of the plug rod can move in the limiting groove.

[0011] Preferably, the movable plate moves with the plug rod, the width of the movable plate is the same as the width of the limiting groove, the movable plate can be inserted into the limiting groove, multiple sets of limiting blocks are fixed on the surface of the movable plate, and multiple sets of slots are opened on the surface of the limiting groove, the width of the slots is greater than the width of the limiting blocks.

[0012] Preferably, the limiting block can be inserted into the slot, and a retaining strip is inserted into the surface of the limiting block. The retaining strip can move inside the limiting block. The diameter of the retaining strip is the same as the diameter of the through hole. The retaining strip can be inserted into the through hole. An insertion groove is opened on the surface of the moving plate. A moving rod is inserted into the insertion groove. The moving rod can move in the insertion groove. A force-bearing plate is fixed at the end of the moving rod. The force-bearing plate moves with the moving rod and can be inserted into the insertion groove.

[0013] Preferably, a fixing plate is fixed to the surface of the connecting plate by a screw, and the end of the fixing plate abuts against the surface of the force plate. The force plate moves with the fixing plate, and the force plate drives the moving rod to move. After the moving rod moves, it abuts against the surface of the crossbar, and the crossbar moves inside the moving plate.

[0014] Preferably, a top holding strip is fixed to the surface of the crossbar. The top holding strip moves with the crossbar. The end of the top holding strip is sharp. After the top holding strip moves, it is inserted between two sets of locking strips. The locking strip moves after being pushed.

[0015] Preferably, after the connecting plate is placed on the surfaces of the new bridge and the old bridge, UHPC concrete is laid on the surface of the connecting plate and the UHPC concrete enters the groove.

[0016] Preferably, the surface of the new bridge is provided with a plug hole, and a force-bearing strip is provided inside the plug hole. The plug rod can be inserted into the plug hole, and the force-bearing strip supports the surface of the plug rod, and the force-bearing strip can deform.

[0017] A method for seamless UHPC rigid splicing of new and old bridges includes the following steps:

[0018] Step 1: Laying. Place the connecting plate on the surface of the new bridge and the old bridge, so that the plug strip is located in the gap between the new bridge and the old bridge. The rollers on the surface of the new bridge and the old bridge are held in the groove opened on the surface of the plug strip. When the new bridge or the old bridge is under load, the connecting plate can swing slightly around the plug strip to prevent the connecting plate from cracking. Push the moving plate to move the moving plate. After pressing down the moving plate, the plug rod is inserted into the plug hole. The plug rod is held in the surface of the force strip in the plug hole. The limiting block is inserted into the groove.

[0019] Step Two: Fixing. The fixing plate is fixed to the surface of the connecting plate using screws. The fixing plate supports the load-bearing plate, causing the load-bearing plate to move. The load-bearing plate drives the moving rod to move. After the moving rod is inserted into the interior of the moving plate, it supports the surface of the crossbar, causing the crossbar to move. The crossbar drives the supporting strip to move. The supporting strip is inserted between the locking strips, allowing the locking strip to extend from the interior of the limiting block. The locking strip is inserted into the through hole in the inner wall of the slot, fixing the moving plate. UHPC concrete is then poured onto the surface of the connecting plate to connect the new bridge and the old bridge together.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] This invention proposes placing a connecting plate on the surfaces of the new and old bridges, such that the connector strip is located in the gap between the new and old bridges. Rollers on the surfaces of the new and old bridges are held in grooves on the surface of the connector strip, with the rollers also resting on their surfaces. When the new or old bridge is under load, the connecting plate can slightly swing around the connector strip to release stress, preventing cracks in the connecting plate. Furthermore, pushing the moving plate allows it to move, and pressing down on the moving plate causes the connector rod to insert into the connector hole. The connector rod rests on the surface of the force-bearing strip in the connector hole, limiting its movement. The block is inserted into the slot, and the fixing plate is fixed to the surface of the connecting plate by screws. The fixing plate supports the load-bearing plate, causing the load-bearing plate to move. The load-bearing plate drives the moving rod to move. After the moving rod is inserted into the inside of the moving plate, it supports the surface of the crossbar, causing the crossbar to move. The crossbar drives the top holding strip to move. The top holding strip is inserted between the locking strips, so that the locking strip extends out from the inside of the limiting block. The locking strip is inserted into the through hole in the inner wall of the slot to fix the moving plate. UHPC concrete is poured on the surface of the connecting plate to connect the new bridge and the old bridge together. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of the present invention from another perspective;

[0024] Figure 3 This is a partially enlarged structural schematic diagram of the present invention;

[0025] Figure 4 for Figure 1 Enlarged schematic diagram of the structure at point A in the middle;

[0026] Figure 5 This is a partially enlarged structural diagram of the connecting plate of the present invention;

[0027] Figure 6 This is a schematic diagram of the movable plate structure of the present invention;

[0028] Figure 7 for Figure 6 Enlarged schematic diagram of the structure at point B.

[0029] In the diagram: New bridge 1, Old bridge 2, Connecting plate 3, Plug rod 4, Plug strip 5, Plug hole 6, Force-bearing strip 7, Fixing plate 8, Limiting block 9, Moving plate 10, Through hole 11, Groove 12, Plug groove 13, Force-bearing plate 14, Limiting groove 15, Slot 16, Roller 17, Moving rod 18, Slot 20, Top holding strip 21, Crossbar 22. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figures 1 to 7 This invention provides a technical solution: a seamless UHPC rigid splicing structure for new and old bridges, comprising:

[0032] The new bridge 1 has an old bridge 2 at one end, with a gap between them. A connecting plate 3 is located on the surface of both the new bridge 1 and the old bridge 2. A connector strip 5 is fixed to the surface of the connecting plate 3 and is inserted into the gap between the new bridge 1 and the old bridge 2. A slot 16 is formed on the surface of the connecting plate 3, and a roller 17 is installed inside the slot 16. The roller 17 can rotate inside the slot 16. A rotating shaft is located on the surface of both the new bridge 1 and the old bridge 2, at their ends. The rotating shafts at the ends of the new bridge 1 and the old bridge 2 are inserted into the slot 16 and supported by the surface of the roller 17, causing the roller 17 to rotate. A connector rod 4 is inserted into the connecting plate. On the surface of the connecting plate 3, the plug rod 4 can move on the surface of the connecting plate 3, and the end of the plug rod 4 can move in the limiting groove 15. After the connecting plate 3 is placed on the surface of the new bridge 1 and the old bridge 2, UHPC concrete is laid on the surface of the connecting plate 3. The UHPC concrete enters the groove 12. The surface of the new bridge 1 is provided with a plug hole 6. The inside of the plug hole 6 is provided with a force strip 7. The plug rod 4 can be inserted into the plug hole 6, and the force strip 7 is held against the surface of the plug rod 4. The force strip 7 can deform. The plug rod 4 is inserted into the plug hole 6, and the plug rod 4 is held against the surface of the force strip 7 in the plug hole 6. The limiting block 9 is inserted into the groove 12. The fixing plate 8 is fixed to the surface of the connecting plate 3 by a screw.

[0033] A limiting groove 15 is formed on the surface of the connecting plate 3. A slot 12 is formed on the surface of the limiting groove 15, and a through hole 11 is formed on the inner wall of the slot 12. A connecting rod 4 is inserted into the surface of the connecting plate 3, with its end inserted into the limiting groove 15. A movable plate 10 is connected to the surface of the connecting rod 4, and the movable plate 10 moves with the connecting rod 4. The width of the movable plate 10 is the same as the width of the limiting groove 15, allowing it to be inserted into the limiting groove 15. Multiple sets of limiting blocks 9 are fixed to the surface of the movable plate 10. Multiple slots 12 are formed on the surface of the limiting groove 15, with the width of the slots 12 greater than the width of the limiting blocks 9. A fixing plate 8 is fixed to the surface of the connecting plate 3 by screws, and the end of the fixing plate 8 abuts against the load-bearing plate. On the surface of 14, the force plate 14 moves with the fixed plate 8, and the force plate 14 drives the moving rod 18 to move. After the moving rod 18 moves, it is held against the surface of the crossbar 22. The crossbar 22 moves inside the moving plate 10. The surface of the crossbar 22 is fixed with a support strip 21. The support strip 21 moves with the crossbar 22. The end of the support strip 21 is sharp. After the support strip 21 moves, it is inserted between two sets of locking strips 20. The locking strips 20 move after being pushed. The slot 12 drives the support strip 21 to move. The support strip 21 is inserted between the locking strips 20, so that the locking strips 20 extend out from the inside of the limiting block 9. The locking strips 20 are inserted into the through hole 11 in the inner wall of the slot 12 to fix the moving plate 10.

[0034] A limiting block 9 is provided on the surface of the movable plate 10. The limiting block 9 can be inserted into the slot 12, and a retaining strip 20 is inserted into the surface of the limiting block 9. The retaining strip 20 can move inside the limiting block 9. The diameter of the retaining strip 20 is the same as the diameter of the through hole 11. The retaining strip 20 can be inserted into the through hole 11. An insertion groove 13 is opened on the surface of the movable plate 10. A movable rod 18 is inserted into the insertion groove 13. The movable rod 18 can move in the insertion groove 13. A force-bearing plate 14 is fixed at the end of the movable rod 18. The force-bearing plate 14 moves with the movable rod 18 and can be inserted into the insertion groove 13.

[0035] The connecting plate 3 is placed on the surfaces of the new bridge 1 and the old bridge 2, so that the insert strip 5 is located in the gap between the new bridge 1 and the old bridge 2. The rollers on the surfaces of the new bridge 1 and the old bridge 2 are held in the slots 16 opened on the surface of the insert strip 5, and the rollers are held on the surface of the roller 17. When the new bridge 1 or the old bridge 2 is under load, the connecting plate 3 can swing slightly around the insert strip 5, so that the connecting plate 3 will not crack, and push the moving plate 10 to move the moving plate 10. After the moving plate 10 is pressed down, the insert rod 4 is inserted into the insert hole 6. The insert rod 4 is held on the surface of the force strip 7 in the insert hole 6. The limiting block 9 is inserted into the slot 12. The screw fixes the fixing plate 8 to the surface of the connecting plate 3. The fixing plate 8 supports the force plate 14, causing the force plate 14 to move. The force plate 14 drives the moving rod 18 to move. The moving rod 18 is inserted into the interior of the moving plate 10 and supports the surface of the crossbar 22, causing the crossbar 22 to move. The crossbar 22 drives the supporting strip 21 to move. The supporting strip 21 is inserted between the locking strips 20, causing the locking strips 20 to extend from the interior of the limiting block 9. The locking strips 20 are inserted into the through hole 11 in the inner wall of the slot 12 to fix the moving plate 10. UHPC concrete is poured on the surface of the connecting plate 3 to connect the new bridge 1 and the old bridge 2 together.

[0036] Although the illustrative specific embodiments of this application have been described above to enable those skilled in the art to understand this application, this application is not limited to the scope of the specific embodiments. For those skilled in the art, all applications utilizing the concept of this application are protected as long as various variations are within the spirit and scope of this application as defined and determined by the appended claims.

Claims

1. A seamless UHPC rigid splicing structure for new and old bridges, characterized in that: include: New bridge (1), with old bridge (2) at the end of the new bridge (1); connecting plate (3), with a limiting groove (15) on the surface of the connecting plate (3), a slot (12) on the surface of the limiting groove (15), and a through hole (11) on the inner wall of the slot (12), a plug rod (4) is inserted into the surface of the connecting plate (3), the end of the plug rod (4) is inserted into the limiting groove (15), and a moving plate (10) is connected to the surface of the plug rod (4); and a limiting block (9), which is located on the surface of the moving plate (10), with a gap between the new bridge (1) and the old bridge (2), the connecting plate (3) is located on the surface of the new bridge (1) and the old bridge (2), and a plug strip (5) is fixed on the surface of the connecting plate (3). The connector strip (5) is inserted into the gap between the new bridge (1) and the old bridge (2). The surface of the connecting plate (3) is provided with a slot (16). A roller (17) is provided inside the slot (16). The roller (17) can rotate inside the slot (16). The surfaces of the new bridge (1) and the old bridge (2) are provided with a rotating shaft. The rotating shaft is located at the end of the new bridge (1) and the old bridge (2). The rotating shaft at the end of the new bridge (1) and the old bridge (2) is inserted into the slot (16). The rotating shaft at the end of the new bridge (1) and the old bridge (2) is supported on the surface of the roller (17). The rotating shaft drives the roller (17) to rotate. The connector rod (4) is inserted into the surface of the connecting plate (3). The connector rod (4) can rotate on the surface of the connecting plate (3). The end of the plug rod (4) can move in the limiting groove (15), and the moving plate (10) moves with the plug rod (4). The width of the moving plate (10) is the same as the width of the limiting groove (15). The moving plate (10) can be inserted into the limiting groove (15). Multiple sets of limiting blocks (9) are fixed on the surface of the moving plate (10). Multiple sets of slots (12) are opened on the surface of the limiting groove (15). The width of the slot (12) is greater than the width of the limiting block (9). The limiting block (9) can be inserted into the slot (12). A retaining strip (20) is inserted into the surface of the limiting block (9). The retaining strip (20) can move inside the limiting block (9). The diameter of the retaining strip (20) is the same as the diameter of the through hole (11). With the same diameter, the card strip (20) can be inserted into the through hole (11). The surface of the moving plate (10) is provided with a insertion groove (13). A moving rod (18) is inserted into the insertion groove (13). The moving rod (18) can move in the insertion groove (13). A force plate (14) is fixed at the end of the moving rod (18). The force plate (14) moves with the moving rod (18). The force plate (14) can be inserted into the insertion groove (13). The surface of the new bridge (1) is provided with an insertion hole (6). A force strip (7) is provided inside the insertion hole (6). The insertion rod (4) can be inserted into the insertion hole (6). The force strip (7) is held against the surface of the insertion rod (4). The force strip (7) can deform.

2. The seamless UHPC rigid splicing structure for new and old bridges according to claim 1, characterized in that: The surface of the connecting plate (3) is fixed with a fixing plate (8) by a screw. The end of the fixing plate (8) rests on the surface of the force plate (14). The force plate (14) moves with the fixing plate (8). The force plate (14) drives the moving rod (18) to move. After the moving rod (18) moves, it rests on the surface of the crossbar (22). The crossbar (22) moves inside the moving plate (10).

3. The seamless UHPC rigid splicing structure for new and old bridges according to claim 2, characterized in that: The surface of the crossbar (22) is fixed with a top support strip (21). The top support strip (21) moves with the crossbar (22). The end of the top support strip (21) is sharp. After the top support strip (21) moves, it is inserted between two sets of locking strips (20). The locking strips (20) move after being pushed.

4. The seamless UHPC rigid splicing structure for new and old bridges according to claim 3, characterized in that: After the connecting plate (3) is placed on the surface of the new bridge (1) and the old bridge (2), UHPC concrete is laid on the surface of the connecting plate (3) and the UHPC concrete enters the groove (12).

5. A method for rigidly splicing new and old bridges using a seamless UHPC as described in claim 4, characterized in that: Includes the following steps: Step 1: Laying. Place the connecting plate (3) on the surface of the new bridge (1) and the old bridge (2), so that the plug strip (5) is located in the gap between the new bridge (1) and the old bridge (2). The rollers on the surface of the new bridge (1) and the old bridge (2) are held in the slot (16) opened on the surface of the plug strip (5). The rollers are held on the surface of the roller (17). When the new bridge (1) or the old bridge (2) is under load, the connecting plate (3) can swing slightly around the plug strip (5) so that the connecting plate (3) will not crack. Push the moving plate (10) so that the moving plate (10) moves. After pressing down the moving plate (10), the plug rod (4) is inserted into the plug hole (6). The plug rod (4) is held on the surface of the force strip (7) in the plug hole (6). The limiting block (9) is inserted into the slot (12). Step 2: Fixing. Fix the fixing plate (8) to the surface of the connecting plate (3) with screws. The fixing plate (8) supports the force plate (14), causing the force plate (14) to move. The force plate (14) drives the moving rod (18) to move. The moving rod (18) is inserted into the interior of the moving plate (10) and supports the surface of the crossbar (22), causing the crossbar (22) to move. The crossbar (22) drives the top support strip (21) to move. The top support strip (21) is inserted between the locking strips (20), causing the locking strips (20) to extend from the interior of the limiting block (9). The locking strips (20) are inserted into the through hole (11) on the inner wall of the slot (12) to fix the moving plate (10). UHPC concrete is poured on the surface of the connecting plate (3) to connect the new bridge (1) and the old bridge (2).

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