A highway bridge expansion joint structure and a construction method for maintenance and reinforcement

Abstract

The present invention discloses a highway bridge expansion joint structure and a maintenance and reinforcement construction method, which belongs to the technical field of bridge construction. A highway bridge expansion joint structure includes two adjacent and symmetrical beams, an expansion joint is formed between the two beams, buffer pads are arranged on the inner walls of both sides of the expansion joint, and each buffer pad is arranged with a steel section on the side away from the expansion joint, screws connected to the steel section are anchored on the upper and lower sides of the beam, and a support pipe is arranged between the screws corresponding to the beams on both sides, and a movable groove is opened in the steel section, and a buffer member matched with the screw is arranged in the movable groove; the present invention replaces the previous rigid connection structure with an elastic setting, improves the stability of the structure, avoids the safety hazard caused by the desoldering phenomenon after the welding points of the previous structure are stressed, and reduces the maintenance cycle; and effectively avoids rainwater and mud from accumulating on the waterstop, does not cause erosion to the waterstop, and improves the service life of the waterstop.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge construction, and particularly relates to a highway bridge expansion joint structure and a maintenance and reinforcement construction method thereof. Background Art

[0002] With the rapid development of urban construction, the development of various transportation facilities has advanced by leaps and bounds; various bridges such as highways and urban viaducts have been successively built; due to the continuous increase in vehicle flow, vehicle speed, vehicle load, and some small problems left over during the construction of the bridge, the damage of the bridge expansion joint joints is very common; the bridge expansion joint refers to a joint set between two beam ends, between a beam end and an abutment, or at the hinge position of the bridge to meet the requirements of the bridge deck deformation. Currently, it is required that the expansion joint can freely expand and contract in two directions parallel and perpendicular to the bridge axis, be firm and reliable, be smooth, without sudden jumps and noises when vehicles pass by, and also prevent rainwater, garbage, and mud from seeping in and blocking; thus, it can be seen that the expansion joint is an important part of the bridge structure.

[0003] The existing bridge expansion joint structure generally uses angle steel or channel steel welded to the embedded steel bars at the end of the bridge deck, and then concrete is poured. Under the impact of the wheels, the welded joints of the steel bars are prone to welding detachment and deformation, resulting in serious vehicle jumping; moreover, the waterstop belt in the expansion joint, after long-term use, accumulates garbage and sundries, and rainwater and mud will accumulate on the waterstop belt, causing erosion and poor waterproof effect and short service life. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems existing in the prior art, and to provide a highway bridge expansion joint structure and a maintenance and reinforcement construction method thereof.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A highway bridge expansion joint structure includes two adjacent and symmetric beam bodies. An expansion joint is formed between the two beam bodies. Buffer pads are provided on the inner walls on both sides of the expansion joint. A steel section is provided on the side of each buffer pad facing away from the expansion joint. Screws connected to the steel section are anchored on both the upper and lower sides of the beam body. A support pipe is provided between the corresponding screws on both beam bodies. An activity groove is formed in the steel section, and a buffer member cooperating with the screw is arranged in the activity groove. A nut for restricting the displacement of the steel section is threadedly connected to the screw, and a waterstop belt is arranged between the two steel sections.

[0007] Preferably, the buffer member includes first elastic elements symmetrically arranged on the inner walls of the upper and lower sides of the activity groove. One end of each first elastic element away from the inner wall of the activity groove is connected to an arc-shaped plate. The screw is placed between the two arc-shaped plates, and the arc-shaped plate is in movable contact with the screw.

[0008] Preferably, the nut includes a main body threadedly connected to the screw rod. A moving block is slidably connected inside the main body. The moving block abuts against the profiled steel. A second elastic element is arranged between the moving block and the inner wall of the main body.

[0009] Preferably, the support pipe includes two sleeves and a connecting rod slidably connected between the two sleeves. The two sleeves are respectively threadedly connected to the screw rods on the two side beams. An annular plate is fixedly arranged on the connecting rod. A third elastic element is arranged between the annular plate and the sleeve. An air inlet valve and an air outlet valve are arranged on the sleeve.

[0010] Preferably, the screw rods anchored on the upper and lower sides inside the beam body are respectively arranged on the upper and lower sides of the water stop belt. And exhaust assemblies and discharging assemblies are respectively arranged on the support pipes arranged on the upper and lower sides of the water stop belt.

[0011] Preferably, the exhaust assembly includes an exhaust pipe fixedly arranged on the support pipe. The exhaust pipe is connected to the air outlet valve of the sleeve.

[0012] Preferably, the discharging assembly includes a first connecting plate and a second connecting plate fixedly arranged on the sleeve. A rotating rod is rotatably connected to the first connecting plate. A moving gear is fixedly arranged on the rotating rod. A rack plate meshing with the moving gear is arranged on the annular plate. A worm is arranged at one end of the rotating rod away from the moving gear. A rotating shaft is rotatably connected to the second connecting plate. A worm gear meshing with the worm is arranged on the rotating shaft. A pneumatic telescopic plate is also arranged on the rotating shaft. A guide air pipe is arranged between the pneumatic telescopic plate and the sleeve. The pneumatic telescopic plate abuts against the water stop belt movably.

[0013] Preferably, a groove is formed at one end of the pneumatic telescopic plate away from the rotating shaft. A rotating shaft is arranged in the groove. A roller is sleeved on the rotating shaft. The roller abuts against the water stop belt movably.

[0014] Preferably, a fixing plate is arranged on the outer side of the screw rod. The fixing plate is arranged inside the beam body.

[0015] The present invention also discloses a maintenance and reinforcement construction method for a highway bridge expansion joint structure, including the following steps:

[0016] S1: Buffer pads are respectively arranged on both sides of the expansion joint. Then, each screw rod is sleeved with profiled steel, so that the screw rod is located between two arc-shaped plates in the movable groove. Then, a nut is screwed on the screw rod to make the nut move towards the side wall of the expansion joint, so that the profiled steel is closely attached to the buffer pad, the nut is closely attached to the profiled steel, and the upper top surface of the profiled steel is flush with the top surface of the beam body;

[0017] S2: Then, first install the support pipe between the two corresponding lower screw rods, so that the two sleeves on both sides of the support pipe are respectively threadedly connected to the screw rods on the two side beams to realize the lapping of the lower two screw rods;

[0018] S3: Subsequently, install a water stop belt between the two steel profiles to intercept the accumulated water on the bridge.

[0019] S4: Finally, lap the screws on the upper sides of the two girders through the support pipes to complete the construction and installation.

[0020] Compared with the prior art, the present invention provides a highway bridge expansion joint structure and a maintenance and reinforcement construction method, having the following beneficial effects:

[0021] 1. For the highway bridge expansion joint structure and the maintenance and reinforcement construction method, the steel profiles and the screws in the girder are elastically arranged, replacing the previous rigid connection structure, improving the stability of the expansion joint structure, avoiding the potential safety hazards caused by the welding points of the previous structure becoming welded off after being stressed, and reducing the maintenance period.

[0022] 2. For the highway bridge expansion joint structure and the maintenance and reinforcement construction method, the support pipes lap the screws on both sides of the expansion joint, improving the support effect on the screws, and avoiding the side of the screw far from the girder being easily bent due to excessive force when the steel profile acts on the screw, thereby improving the stability of the structure.

[0023] 3. For the highway bridge expansion joint structure and the maintenance and reinforcement construction method, the exhaust components and discharge components provided on the upper and lower support pipes effectively remove the sundries on the water stop belt, avoiding the accumulation of rainwater and mud on the water stop belt, preventing erosion of the water stop belt, and improving the service life of the water stop belt. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is the structural schematic diagram of the present invention Figure 1 ;

[0025] Figure 2 is the structural schematic diagram of the present invention Figure 2 ;

[0026] Figure 3 is the sectional structural schematic diagram of the present invention;

[0027] Figure 4 is of the present invention Figure 3 partial enlarged schematic diagram of part A in

[0028] Figure 5 is the sectional structural schematic diagram of the steel profile of the present invention;

[0029] Figure 6 is the sectional structural schematic diagram of the nut of the present invention;

[0030] Figure 7 is the structural schematic diagram of the support pipe of the present invention;

[0031] Figure 8 This is a schematic structural diagram of the material discharging assembly of the present invention.

[0032] In the figure: 1, beam body; 101, screw; 2, buffer pad; 3, section steel; 4, movable groove; 401, first elastic element; 402, arc plate; 5, nut; 501, main body; 502, moving block; 503, second elastic element; 6, support pipe; 601, sleeve; 602, connecting rod; 6021, annular plate; 6022, third elastic element; 7, water stop belt; 8, exhaust pipe; 9, first connecting plate; 901, rotating rod; 902, moving gear; 903, worm; 10, rack plate; 11, second connecting plate; 111, rotating shaft; 112, worm gear; 113, pneumatic telescopic plate; 114, air guide pipe; 12, groove; 121, roller; 13, fixing plate. Detailed implementation manners

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0035] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "provided with", "sheathed / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements; for those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0036] Embodiment:

[0037] Refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 andFigure 6 A highway bridge expansion joint structure comprises two adjacent and symmetrical beam bodies 1, an expansion joint is formed between the two beam bodies 1, buffer pads 2 are arranged on the inner walls on both sides of the expansion joint, a steel section 3 is arranged on the side of each buffer pad 2 away from the expansion joint, screws 101 connected to the steel section 3 are anchored on the upper and lower sides of the beam body 1, a support pipe 6 is arranged between the screws 101 corresponding to the beam bodies 1 on both sides, a movable groove 4 is opened in the steel section 3, a buffer member matched with the screw 101 is arranged in the movable groove 4, a nut 5 for limiting the displacement of the steel section 3 is threadedly connected to the screw 101, and a water stop strip 7 is arranged between the two steel sections 3.

[0038] Furthermore, the buffer comprises first elastic elements 401 symmetrically arranged on the upper and lower inner walls of the movable groove 4, and one end of each first elastic element 401 away from the inner wall of the movable groove 4 is connected to an arc plate 402, the screw 101 is placed between the two arc plates 402, and the arc plate 402 and the screw 101 are movably opposed.

[0039] Furthermore, the nut 5 includes a main body 501 threadedly connected to the screw rod 101 , a moving block 502 is slidably connected inside the main body 501 , the moving block 502 movably abuts against the steel section 3 , and a second elastic element 503 is provided between the moving block 502 and the inner wall of the main body 501 .

[0040] Specifically, during normal operation, the screw 101 is placed between the two arc-shaped plates 402 in the movable groove 4, the steel 3 is close to the buffer pad 2, the nut 5 is close to the steel 3, and the upper top surface of the steel 3 is flush with the top surface of the beam body 1. When a vehicle passes by, the vehicle exerts force on the steel 3. When both sides of the steel 3 are subjected to force at the same time, the first elastic element 401 is deformed to play a buffering role; when one side of the steel 3 is subjected to force, the steel 3 deflects, the buffer pad 2 is deformed, and the nut 5 changes accordingly, and the moving block 502 squeezes the second elastic element 503 and shrinks into the main body 501, effectively avoiding the safety hazard of desoldering caused by long-term stress in the rigid connection formed by welding in the past, improving the stability of the structure, and reducing the maintenance cycle. The screws 101 on both sides of the expansion joint are overlapped by the support tube 6 to improve the support effect of the screw 101, and avoid the side of the screw 101 away from the beam body 1 being subjected to excessive force and easy to bend when the steel 3 exerts force on the screw 101, thereby improving the stability of the structure.

[0041] Reference Figure 2 , Figure 3 and Figure 7, as a preferred technical solution of the present invention, the support pipe 6 includes two sleeves 601 and a connecting rod 602 slidably connected between the two sleeves 601. The two sleeves 601 are respectively threadedly connected to the screw rods 101 on the two side beams 1. An annular plate 6021 is fixedly provided on the connecting rod 602, and a third elastic element 6022 is arranged between the annular plate 6021 and the sleeve 601. An air inlet valve and an air outlet valve are arranged on the sleeve 601; specifically, by setting the support pipe 6 as an elastically connected sleeve 601 and connecting rod 602, the support pipe 6 meets the needs of the bridge expansion and contraction deformation, meets the requirements of thermal expansion and contraction, and can still maintain a relatively stable connection under the condition of high-frequency reciprocating relative movement, has a good damping and vibration reduction function, improves the service life of the bridge expansion joint, and reduces the difficulty of maintaining the bridge expansion joint.

[0042] Refer to Figure 2 , Figure 3 , Figure 4 and Figure 7 , as a preferred technical solution of the present invention, the screw rods 101 anchored on the upper and lower sides inside the beam body 1 are respectively placed on the upper and lower sides of the water stop 7, and the support pipes 6 placed on the upper and lower sides of the water stop 7 are respectively provided with an exhaust assembly and a discharging assembly.

[0043] Furthermore, the exhaust assembly includes an exhaust pipe 8 fixedly provided on the support pipe 6, and the exhaust pipe 8 is connected to the air outlet valve of the sleeve 601.

[0044] Specifically, when the two side bridges generate relative movement, the sleeve 601 moves relative to the connecting rod 602. Since one side of the sleeve 601 is threadedly connected to the screw rod 101, the connecting rod 602 can squeeze the air inside the sleeve 601, so that the air inside the sleeve 601 is discharged to the water stop 7 through the exhaust pipe 8. These airflows can blow the rainwater and dust accumulated on the water stop 7, avoid the accumulation of rainwater and mud on the water stop 7, will not cause erosion to the water stop 7, and reduce the daily maintenance and cleaning work of the staff.

[0045] Refer to Figure 2 , Figure 3 , Figure 4 and Figure 8, as a preferred technical solution of the present invention, the discharging assembly includes a first connecting plate 9 and a second connecting plate 11 fixedly arranged on the sleeve 601. A rotating rod 901 is rotatably connected to the first connecting plate 9. A moving gear 902 is fixedly arranged on the rotating rod 901. A rack plate 10 meshingly connected with the moving gear 902 is arranged on the annular plate 6021. One end of the rotating rod 901 away from the moving gear 902 is provided with a worm 903. A rotating shaft 111 is rotatably connected to the second connecting plate 11. A worm gear 112 meshingly connected with the worm 903 is arranged on the rotating shaft 111. An air-operated telescopic plate 113 is also arranged on the rotating shaft 111. An air duct 114 is arranged between the air-operated telescopic plate 113 and the sleeve 601. The air-operated telescopic plate 113 is in movable contact with the water stop 7.

[0046] Specifically, when relative movement occurs between the two side bridges, the sleeve 601 moves relative to the connecting rod 602. Since one side of the sleeve 601 is threadedly connected to the screw rod 101, the connecting rod 602 can squeeze the air inside the sleeve 601, so that the air inside the sleeve 601 is discharged into the air-operated telescopic plate 113 through the air duct 114, and the telescopic plate is stretched, enabling it to contact the water stop 7 arranged above. At the same time, the relative movement between the connecting rod 602 and the sleeve 601 causes the rack plate 10 on the annular plate 6021 to mesh with the moving gear 902. The moving gear 902 drives the rotating rod 901 to rotate on the first connecting plate 9, and causes the worm 903 on the rotating rod 901 to mesh with the worm gear 112 on the rotating shaft 111, so that the worm gear 112 drives the rotating shaft 111 on the second connecting plate 11 to rotate. The rotating shaft 111 drives the stretched air-operated telescopic plate 113 to swing around the rotating shaft 111, so that the air-operated telescopic plate 113 stirs the water stop 7, thereby conveying the sundries such as stones accumulated on the water stop 7 in one direction. When the third elastic element 6022 elastically resets, the air-operated telescopic plate 113 rotates reversely around the rotating shaft 111. However, at this time, the air flow inside the air-operated telescopic plate 113 flows back into the sleeve 601 again, and the air-operated telescopic plate 113 retracts so that it will not contact the water stop 7 during the rotation process, thus enabling the sundries on the water stop 7 to always be stirred in one direction, reducing the daily maintenance and cleaning work, and improving the service life of the water stop 7.

[0047] Refer to Figure 8 , as a preferred technical solution of the present invention, a groove 12 is formed at one end of the air-operated telescopic plate 113 away from the rotating shaft 111. A rotating shaft is arranged inside the groove 12. A roller 121 is sleeved on the rotating shaft. The roller 121 is in movable contact with the water stop 7; specifically, by arranging a rotatable roller 121 at the end of the air-operated telescopic plate 113, when the air-operated telescopic plate 113 stirs the water stop 7, the wear degree on the water stop 7 is reduced, ensuring the service life of the water stop 7.

[0048] Refer to Figure 8, as a preferred technical solution of the present invention, a fixing plate 13 is arranged outside the screw rod 101, and the fixing plate 13 is arranged inside the beam body 1; specifically, it improves the anchoring effect of the screw rod 101 and the stability of the structure.

[0049] The present invention also discloses a maintenance and reinforcement construction method for a highway bridge expansion joint structure, including the following steps:

[0050] S1: Buffer pads 2 are respectively arranged on both sides of the expansion joint. Then, each screw rod 101 on each side is sleeved with a profiled steel 3, so that the screw rod 101 is placed between two arc-shaped plates 402 in the movable groove 4. Then, a nut 5 is screwed on the screw rod 101, so that the nut 5 moves towards the side wall of the expansion joint, making the profiled steel 3 closely attached to the buffer pad 2, the nut 5 closely attached to the profiled steel 3, and the upper top surface of the profiled steel 3 flush with the top surface of the beam body 1;

[0051] S2: Then, the support pipe 6 between the two corresponding lower screw rods 101 is installed first, so that the two sleeve pipes 601 on both sides of the support pipe 6 are respectively threadedly connected to the screw rods 101 on the two side beam bodies 1, realizing the lap joint of the lower two screw rods 101;

[0052] S3: Then, a water stop belt 7 is installed between the two profiled steels 3 to intercept the accumulated water on the bridge;

[0053] S4: Finally, the screw rods 101 on the upper sides of the two beam bodies 1 are lap-jointed through the support pipe 6 to complete the construction and installation.

[0054] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A highway bridge expansion joint structure, comprising two adjacent and symmetric beam bodies (1), and an expansion joint is formed between the two beam bodies (1). It is characterized in that buffer pads (2) are arranged on the inner walls on both sides of the expansion joint, a profiled steel (3) is arranged on the side of each buffer pad (2) facing away from the expansion joint, screw rods (101) connected to the profiled steel (3) are anchored on the upper and lower sides of the beam body (1), a support pipe (6) is arranged between the screw rods (101) corresponding to the two beam bodies (1), a movable groove (4) is formed in the profiled steel (3), a buffer member matching with the screw rod (101) is arranged in the movable groove (4), a nut (5) for restricting the displacement of the profiled steel (3) is threadedly connected to the screw rod (101), and a water stop belt (7) is arranged between the two profiled steels (3); The support pipe (6) comprises two sleeve pipes (601) and a connecting rod (602) slidably connected between the two sleeve pipes (601), the two sleeve pipes (601) are respectively threadedly connected to the screw rods (101) on the two beam bodies (1), an annular plate (6021) is fixedly arranged on the connecting rod (602), a third elastic element (6022) is arranged between the annular plate (6021) and the sleeve pipe (601), and an air inlet valve and an air outlet valve are arranged on the sleeve pipe (601); The screw rods (101) anchored on the upper and lower sides in the beam body (1) are respectively arranged on the upper and lower sides of the water stop belt (7), and an exhaust assembly and a discharging assembly are respectively arranged on the support pipes (6) arranged on the upper and lower sides of the water stop belt (7); The exhaust assembly comprises an exhaust pipe (8) fixedly arranged on the support pipe (6), and the exhaust pipe (8) is connected to the air outlet valve of the sleeve pipe (601); The discharging assembly comprises a first connecting plate (9) and a second connecting plate (11) fixedly arranged on the sleeve pipe (601), a rotating rod (901) is rotatably connected to the first connecting plate (9), a moving gear (902) is fixedly arranged on the rotating rod (901), a rack plate (10) meshed with the moving gear (902) is arranged on the annular plate (6021), a worm (903) is arranged at one end of the rotating rod (901) away from the moving gear (902), a rotating shaft (111) is rotatably connected to the second connecting plate (11), a worm gear (112) meshed with the worm (903) is arranged on the rotating shaft (111), a pneumatic telescopic plate (113) is further arranged on the rotating shaft (111), a guide air pipe (114) is arranged between the pneumatic telescopic plate (113) and the sleeve pipe (601), and the pneumatic telescopic plate (113) is movably abutted against the water stop belt (7).

2. A highway bridge expansion joint structure according to claim 1, It is characterized in that The buffer member includes first elastic elements (401) symmetrically arranged on the inner walls of the upper and lower sides of the movable slot (4). One end of each first elastic element (401) away from the inner wall of the movable slot (4) is connected to an arc-shaped plate (402). The screw rod (101) is placed between the two arc-shaped plates (402), and the arc-shaped plate (402) is in movable contact with the screw rod (101).

3. A highway bridge expansion joint structure according to claim 2, characterized in that, the nut (5) includes a main body (501) threadedly connected to the screw rod (101). A movable block (502) is slidably connected in the main body (501). The movable block (502) is in movable contact with the profiled steel (3). A second elastic element (503) is arranged between the movable block (502) and the inner wall of the main body (501).

4. A highway bridge expansion joint structure according to claim 1, characterized in that, a groove (12) is formed at one end of the pneumatic expansion plate (113) away from the rotating shaft (111). A rotating shaft is arranged in the groove (12). A roller (121) is sleeved on the rotating shaft. The roller (121) is in movable contact with the water stop belt (7).

5. A highway bridge expansion joint structure according to claim 1, characterized in that, a fixing plate (13) is arranged on the outer side of the screw rod (101). The fixing plate (13) is arranged in the beam body (1).

6. A maintenance and reinforcement construction method for a highway bridge expansion joint structure according to claim 1, characterized in that, comprises the following steps: S1: Buffer pads (2) are respectively arranged on both sides of the expansion joint. Subsequently, the screw rod (101) on each side is sleeved with profiled steel (3), so that the screw rod (101) is placed between the two arc-shaped plates (402) in the movable slot (4). Then, a nut (5) is screwed on the screw rod (101) to move the nut (5) towards the side wall of the expansion joint, so that the profiled steel (3) is tightly attached to the buffer pad (2), the nut (5) is tightly attached to the profiled steel (3), and the upper top surface of the profiled steel (3) is flush with the top surface of the beam body (1); S2: Then, the support pipe (6) between the two corresponding lower screw rods (101) is installed first, so that the two sleeve pipes (601) on both sides of the support pipe (6) are respectively threadedly connected to the screw rods (101) on the two side beam bodies (1) to realize the lapping of the lower two screw rods (101); S3: Subsequently, a water stop belt (7) is installed between the two profiled steels (3) to intercept the accumulated water on the bridge; S4: Finally, the screw rods (101) on the upper sides of the two beam bodies (1) are lapped through the support pipe (6) to complete the construction and installation.

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