Bridge widening splicing structure

Abstract

The utility model relates to the technical field of bridge widening, in particular to a bridge widening splicing structure which comprises an old bridge butt-joint hollow slab and a new bridge butt-joint hollow slab, and a plurality of reinforcing connecting pieces are installed between the old bridge butt-joint hollow slab and the new bridge butt-joint hollow slab. Concrete is poured in the old bridge butt-joint hollow slab and the new bridge butt-joint hollow slab, and a through groove is formed in the top face of the new bridge butt-joint hollow slab; the reinforcing connecting piece comprises a connecting rod, a thread is arranged at the position, close to the tail end, of the periphery of the connecting rod, a locking assembly is installed on the periphery of the connecting rod through the thread, a plurality of reinforcing assemblies are arranged on the portion, away from the thread, of the periphery of the connecting rod, and a limiting assembly is arranged at the position, close to the middle, of the periphery of the connecting rod. Through the arrangement of the old bridge butt-joint hollow slabs, the new bridge butt-joint hollow slabs and the multiple sets of reinforcing connecting pieces, the butt-joint stability between the new bridge and the old bridge after the bridge is widened can be remarkably enhanced.

Description

Technical Field

[0001] This utility model relates to the field of bridge widening technology, specifically a bridge widening splicing structure. Background Technology

[0002] With the acceleration of urbanization and population growth, the number of vehicles is constantly increasing, and existing bridges may not be able to withstand the growing traffic flow, leading to congestion and an increased risk of traffic accidents. Therefore, it is necessary to increase the width of existing bridges through structural renovation or expansion to meet the demands of traffic flow and safety.

[0003] Existing technologies include a bridge widening and splicing structure, such as the patent with application number CN201120169654.9, which adopts the design principle of "connecting the upper part but not the lower part". That is, the upper hollow slabs of the new and old bridges are connected by cast-in-place concrete wet joint, the bridge deck is continuous, and the lower piers and foundations are no longer connected, each bearing relatively independent force to adapt to the differential settlement between the new and old bridges. The outer side plate of the old bridge is replaced, but its pier cap beam is not removed. Only the old bridge's crash guardrail is removed. After the old bridge slab is replaced, the edge of the beam slab next to the old bridge after the replacement is connected to the beam slab of the new bridge by rebar installation, so that the new and old bridges form a solid whole.

[0004] However, the above-mentioned patents still have the following shortcomings in use:

[0005] During rebar installation, rebar is used to penetrate the joint sides of the old bridge's connecting hollow slab and the new bridge's connecting hollow slab. Due to the hollow structure of the hollow slab, the traditional drilling and grouting method cannot guarantee that the rebar's pull-out resistance meets the requirements. Therefore, it is usually necessary to use bolts to lock and fix the two ends of the rebar to achieve a stable connection between the old and new hollow slabs. During the process, the top of the old and new hollow slabs needs to be slotted for installation. The entire rebar installation process is quite cumbersome and increases labor intensity. In addition, the surface of the rebar is relatively smooth, and after grouting in the hollow slab, it is easily affected by the vibration of the bridge deck, which may cause the concrete to separate, thereby reducing the connection stability between the old and new bridges. Utility Model Content

[0006] The purpose of this utility model is to provide a bridge widening and splicing structure to solve the problems mentioned in the background art.

[0007] The objective of this utility model can be achieved through the following technical solutions:

[0008] A bridge widening splicing structure includes a hollow slab connecting an old bridge and a hollow slab connecting a new bridge. Multiple reinforcing connectors are arrayed and installed along the length of the old bridge and the new bridge connecting hollow slabs. The two ends of the reinforcing connectors extend into the old bridge connecting hollow slab and the new bridge connecting hollow slab, respectively. Concrete is poured into both the old bridge connecting hollow slab and the new bridge connecting hollow slab. A through groove is opened on the top surface of the new bridge connecting hollow slab.

[0009] The reinforcing connector includes a connecting rod, and the outer periphery of the connecting rod is provided with a thread near the tail end. The outer periphery of the connecting rod is installed to the locking assembly through the thread. Multiple sets of reinforcing assemblies are provided on the outer periphery of the connecting rod away from the thread, and a limiting assembly is provided on the outer periphery of the connecting rod near the middle. The limiting assembly is located between the locking assembly and the reinforcing assembly.

[0010] In the installed state, the tail end of the connecting rod is located in the new bridge docking hollow plate, the front end of the connecting rod is located in the old bridge docking hollow plate, the locking assembly is located in the new bridge docking hollow plate, and the limiting assembly and multiple sets of reinforcing assemblies are located in the old bridge docking hollow plate.

[0011] The locking assembly is used in conjunction with the limiting assembly to lock and fix the connecting rod between the old bridge docking hollow plate and the new bridge docking hollow plate.

[0012] Furthermore, the locking assembly includes a threaded ring that is threaded onto the periphery of the connecting rod, and a plurality of handles arranged in a circumferential array about the axis of the threaded ring are fixedly connected to the periphery of the threaded ring.

[0013] The threaded ring is covered with a friction pad on the side away from the end of the connecting rod.

[0014] Furthermore, the limiting component includes multiple mounting slots two formed on the periphery of the connecting rod, and the multiple mounting slots two are circumferentially arrayed about the axis of the connecting rod;

[0015] A spring is installed on the bottom surface of the second mounting groove. A limiting block is fixedly connected to the top of the spring. The side of the limiting block is in sliding contact with the inner wall of the second mounting groove. Under the support of the spring, the upper part of the limiting block is located outside the second mounting groove, and the lower part of the limiting block is located inside the second mounting groove.

[0016] The cross-section of the limiting block is a right triangle, and the side of the limiting block away from the tail end of the connecting rod is an inclined plane.

[0017] Furthermore, the reinforcement component includes a plurality of mounting slots formed on the periphery of the connecting rod, and the plurality of mounting slots are arranged in a circumferential array about the axis of the connecting rod;

[0018] A mounting shaft is rotatably connected between the two sides of the mounting groove. The mounting shaft is located at the end of the mounting groove away from the end of the connecting rod. A movable plate is fixedly connected to the periphery of the mounting shaft. A spring is fixedly connected between the middle of the bottom surface of the movable plate and the middle of the bottom surface of the mounting groove.

[0019] Under the support of the spring, the angle between the movable plate and the bottom surface of the mounting groove is an acute angle.

[0020] Furthermore, the connecting rod is a hollow rod structure with open ends.

[0021] The beneficial effects of this utility model are:

[0022] 1. In the reinforcement connector, the new and old bridges can be locked together by rotating the threaded ring at one end of the connecting rod. Compared with the existing technology, this utility model does not require locking and fixing at both ends of the steel bar, and also eliminates the need to slot the top of the hollow slab of the old bridge, thereby reducing labor intensity and improving overall construction efficiency.

[0023] 2. When the reinforcement component passes through the through holes of the old bridge docking hollow slab and the new bridge docking hollow slab, the movable plate is squeezed by the hole wall and will be squeezed and fitted into the installation groove one, thus ensuring the smooth passage of the connecting rod through the through hole. After the reinforcement component enters the old bridge docking hollow slab, the restoring force of spring one drives the movable plate to return to its original position. Multiple movable plates form a barb structure on the surface of the connecting rod. After concrete is poured into the old bridge docking hollow slab, the connection between the connecting rod and the old bridge docking hollow slab can be effectively improved, thereby improving the reinforcement effect of the reinforcement connector. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0026] Figure 2 yes Figure 1 Top view;

[0027] Figure 3 This is a three-dimensional schematic diagram of the connection relationship between the reinforcing connector and the hollow plate of the old Qiao docking and the hollow plate of the new Qiao docking in this utility model;

[0028] Figure 4 yes Figure 3 A three-dimensional diagram from another angle;

[0029] Figure 5 yes Figure 3 Enlarged view of section A;

[0030] Figure 6 yes Figure 4 Enlarged view of section B;

[0031] Figure 7 This is a structural diagram showing the connection relationship between the limiting block and the second mounting groove;

[0032] The reference numerals in the attached figures are as follows:

[0033] 1-Old bridge connecting hollow plate, 2-New bridge connecting hollow plate, 3-Reinforced connector, 4-Reinforcement component, 5-Connecting rod, 6-Thread, 7-Threaded ring, 8-Handle, 9-Friction pad, 10-Mounting slot one, 11-Moving plate, 12-Spring one, 13-Limiting block, 14-Mounting slot two, 15-Spring two, 16-Limiting component. Detailed Implementation

[0034] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] Example 1:

[0036] Please see Figures 1-7 In this embodiment of the utility model, a bridge widening splicing structure includes an old bridge connecting hollow slab 1 and a new bridge connecting hollow slab 2. Multiple reinforcing connectors 3 are arrayed and installed between the old bridge connecting hollow slab 1 and the new bridge connecting hollow slab 2 along their length direction. The two ends of the reinforcing connectors 3 extend into the old bridge connecting hollow slab 1 and the new bridge connecting hollow slab 2, respectively. Concrete is poured into both the old bridge connecting hollow slab 1 and the new bridge connecting hollow slab 2. A through groove is opened on the top surface of the new bridge connecting hollow slab 2.

[0037] The reinforcing connector 3 includes a connecting rod 5. A thread 6 is provided on the outer periphery of the connecting rod 5 near the tail end. The outer periphery of the connecting rod 5 is threaded to the locking assembly through the thread 6. Multiple sets of reinforcing assemblies 4 are provided on the outer periphery of the connecting rod 5 away from the thread 6. A limiting assembly 16 is provided on the outer periphery of the connecting rod 5 near the middle. The limiting assembly 16 is located between the locking assembly and the reinforcing assembly 4.

[0038] In the installed state, the tail end of the connecting rod 5 is located in the new bridge docking hollow plate 2, the front end of the connecting rod 5 is located in the old bridge docking hollow plate 1, the locking component is located in the new bridge docking hollow plate 2, and the limiting component 16 and multiple sets of reinforcing components 4 are located in the old bridge docking hollow plate 1.

[0039] The locking assembly is used in conjunction with the limiting assembly 16 to lock and fix the connecting rod 5 between the old bridge docking hollow plate 1 and the new bridge docking hollow plate 2.

[0040] The locking assembly includes a threaded ring 7 that is threaded onto the periphery of the connecting rod 5 via a thread 6, and a plurality of handles 8 that are circumferentially arrayed about the axis of the threaded ring 7 are fixedly connected to the periphery of the threaded ring 7.

[0041] A friction pad 9 is provided on the side of the threaded ring 7 away from the end of the connecting rod 5.

[0042] The limiting component 16 includes multiple mounting slots 14 formed around the periphery of the connecting rod 5, and the multiple mounting slots 14 are arranged in a circumferential array about the axis of the connecting rod 5.

[0043] A spring 15 is installed on the bottom surface of the mounting groove 14. A limiting block 13 is fixedly connected to the top of the spring 15. The side of the limiting block 13 slides in contact with the inner wall of the mounting groove 14. Under the support of the spring 15, the upper part of the limiting block 13 is located outside the mounting groove 14, and the lower part of the limiting block 13 is located inside the mounting groove 14.

[0044] The cross-section of the limiting block 13 is a right triangle, and the side of the limiting block 13 away from the tail end of the connecting rod 5 is an inclined plane.

[0045] Among them, the reinforcing component 4 includes a plurality of mounting slots 10 formed on the periphery of the connecting rod 5, and the plurality of mounting slots 10 are arranged in a circumferential array about the axis of the connecting rod 5;

[0046] A mounting shaft is rotatably connected between the two sides of the mounting groove 10. The mounting shaft is located at the end of the mounting groove 10 away from the tail end of the connecting rod 5. A movable plate 11 is fixedly connected to the periphery of the mounting shaft. A spring 12 is fixedly connected between the middle position of the bottom surface of the movable plate 11 and the middle position of the bottom surface of the mounting groove 10.

[0047] Under the support of spring 12, the angle between the movable plate 11 and the bottom surface of the mounting groove 10 is an acute angle.

[0048] When using this utility model:

[0049] A tongue-and-groove joint is formed between the old bridge connecting hollow slab 1 and the new bridge connecting hollow slab 2, and concrete is poured into the tongue-and-groove joint. At the same time, multiple reinforcing connectors 3 are set between the old bridge connecting hollow slab 1 and the new bridge connecting hollow slab 2 to form a stable connection, thereby significantly improving the connection stability between the old bridge connecting hollow slab 1 and the new bridge connecting hollow slab 2.

[0050] Specifically, when installing the reinforcing connector 3, aligned through holes are provided at the joints of the old bridge connecting hollow plate 1 and the new bridge connecting hollow plate 2. Then, the reinforcing connector 3 is moved into the interior of the new bridge connecting hollow plate 2 through the through groove on the top surface of the new bridge connecting hollow plate 2 for installation. Specifically, the front end of the connecting rod 5 is passed through the through holes of the new bridge connecting hollow plate 2 and the old bridge connecting hollow plate 1, so that the reinforcing component 4 and the limiting component 16 are both located in the old bridge connecting hollow plate 1. Then, the connecting rod 5 is locked and fixed between the old bridge connecting hollow plate 1 and the new bridge connecting hollow plate 2 by the locking component and the limiting component 16.

[0051] When the reinforcing component 4 passes through the through holes of the old bridge connecting hollow slab 1 and the new bridge connecting hollow slab 2, the movable plate 11 is squeezed by the hole wall and will be squeezed and fitted into the mounting groove 10, thus ensuring the smooth passage of the connecting rod 5 through the through hole. After the reinforcing component 4 enters the old bridge connecting hollow slab 1, the restoring force of the spring 12 drives the movable plate 11 to return to its original position. Multiple movable plates 11 form a barb structure on the surface of the connecting rod 5. After concrete is poured into the old bridge connecting hollow slab 1, the connection between the connecting rod 5 and the old bridge connecting hollow slab 1 can be effectively improved, thereby improving the reinforcement effect of the reinforcing connector 3.

[0052] When the limiting component 16 passes through the through holes of the old bridge docking hollow plate 1 and the new bridge docking hollow plate 2, the inclined surface of the limiting block 13 is squeezed by the hole wall, causing the limiting block 13 to retract into the mounting groove 14, thereby ensuring the smooth passage of the connecting rod 5. After the limiting component 16 enters the old bridge docking hollow plate 1, the restoring force of the spring 15 drives the limiting block 13 to reset. Then, by rotating the threaded ring 7 in the locking component, until the friction pad 9 is pressed against the side wall of the new bridge docking hollow plate 2, and the limiting block 13 is pressed against the side wall of the old bridge docking hollow plate 1, the purpose of locking and fixing the connecting rod 5 between the old bridge docking hollow plate 1 and the new bridge docking hollow plate 2 is achieved.

[0053] The handle 8 allows for easy rotation of the threaded ring 7. Furthermore, the concrete pouring into the hollow slab 2 of the new bridge connection enhances the grip between the threaded ring 7 and the concrete, thereby improving the connection stability between the connecting rod 5 and the hollow slab 2. The friction pad 9 increases the friction between the threaded ring 7 and the sidewall of the hollow slab 2, preventing the threaded ring 7 from rotating and loosening on the connecting rod 5.

[0054] Therefore, in this utility model, the connection stability between the old and new bridges after widening is significantly enhanced by the arrangement of the old bridge connecting hollow plate 1, the new bridge connecting hollow plate 2, and multiple sets of reinforcing connectors 3. This reduces the possibility of breakage at the connection point during long-term use, thereby extending the service life of the widened new bridge.

[0055] In the reinforcing connector 3, the new and old bridges can be locked together by rotating the threaded ring 7 at one end of the connecting rod. Compared with the prior art, this utility model does not require locking and fixing at both ends of the reinforcing bar, and also eliminates the need to slot the top of the hollow slab of the old bridge, thereby reducing labor intensity and improving overall construction efficiency.

[0056] Example 2:

[0057] Please see Figure 1 Based on Example 1, the connecting rod 5 is a hollow rod structure with open ends.

[0058] The hollow design of the connecting rod 5 allows the old bridge connecting hollow slab 1 and the new bridge connecting hollow slab 2 to be in a continuous state during concrete pouring. This facilitates simultaneous pouring of concrete into the old bridge connecting hollow slab 1 while pouring concrete into the new bridge connecting hollow slab 2, thus improving construction convenience. At the same time, the hollow structure also reduces the overall weight of the reinforcing connector 3, making it easier to transport and construct. The hollow structure also allows for better material utilization in terms of load-bearing capacity, making it suitable for designs requiring high strength and lightweight construction.

[0059] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A bridge widening splicing structure, comprising hollow slabs (1) for connecting old bridge sections and hollow slabs (2) for connecting new bridge sections, characterized in that, Multiple reinforcing connectors (3) are arrayed along the length of the old bridge connecting hollow slab (1) and the new bridge connecting hollow slab (2). The two ends of the reinforcing connectors (3) extend into the old bridge connecting hollow slab (1) and the new bridge connecting hollow slab (2), respectively. Concrete is poured into both the old bridge connecting hollow slab (1) and the new bridge connecting hollow slab (2). A through groove is opened on the top surface of the new bridge connecting hollow slab (2). The reinforcing connector (3) includes a connecting rod (5). A thread (6) is provided on the outer periphery of the connecting rod (5) near the tail end. The outer periphery of the connecting rod (5) is threaded to the locking assembly through the thread (6). Multiple sets of reinforcing assemblies (4) are provided on the outer periphery of the connecting rod (5) away from the thread (6). A limiting assembly (16) is provided on the outer periphery of the connecting rod (5) near the middle. The limiting assembly (16) is located between the locking assembly and the reinforcing assembly (4). In the installed state, the tail end of the connecting rod (5) is located in the new bridge docking hollow plate (2), the front end of the connecting rod (5) is located in the old bridge docking hollow plate (1), and the locking assembly is located in the new bridge docking hollow plate (2). The limiting assembly (16) and multiple sets of reinforcing assemblies (4) are located in the old bridge docking hollow plate (1). The locking assembly is used in conjunction with the limiting assembly (16) to lock and fix the connecting rod (5) between the old bridge docking hollow plate (1) and the new bridge docking hollow plate (2).

2. The bridge widening splicing structure according to claim 1, characterized in that, The locking assembly includes a threaded ring (7) threadedly mounted on the periphery of the connecting rod (5) via the thread (6), and a plurality of handles (8) arranged in a circumferential array about the axis of the threaded ring (7) are fixedly connected to the periphery of the threaded ring (7). The threaded ring (7) is covered with a friction pad (9) on the side away from the end of the connecting rod (5).

3. The bridge widening splicing structure according to claim 1, characterized in that, The limiting component (16) includes a plurality of mounting slots (14) formed around the periphery of the connecting rod (5), and the plurality of mounting slots (14) are arranged in a circumferential array about the axis of the connecting rod (5); A spring (15) is installed on the bottom surface of the second mounting groove (14). A limiting block (13) is fixedly connected to the top of the second spring (15). The side of the limiting block (13) slides in contact with the inner wall of the second mounting groove (14). Under the support of the second spring (15), the upper part of the limiting block (13) is located outside the second mounting groove (14), and the lower part of the limiting block (13) is located inside the second mounting groove (14). The cross section of the limiting block (13) is a right triangle, and the side of the limiting block (13) away from the tail end of the connecting rod (5) is an inclined plane.

4. The bridge widening splicing structure according to claim 1, characterized in that, The reinforcement component (4) includes a plurality of mounting slots (10) formed around the periphery of the connecting rod (5), and the plurality of mounting slots (10) are arranged in a circumferential array about the axis of the connecting rod (5); A mounting shaft is rotatably connected between the two sides of the mounting groove (10). The mounting shaft is located at the end of the mounting groove (10) away from the tail end of the connecting rod (5). A movable plate (11) is fixedly connected to the periphery of the mounting shaft. A spring (12) is fixedly connected between the middle position of the bottom surface of the movable plate (11) and the middle position of the bottom surface of the mounting groove (10). Under the support of the spring (12), the angle between the movable plate (11) and the bottom surface of the mounting groove (10) is an acute angle.

5. A bridge widening splicing structure according to claim 1, characterized in that, The connecting rod (5) is a hollow rod structure with open ends.

Images