Bridge external prestressing anti-seismic reinforcing device

Abstract

The utility model relates to the technical field of external prestressing anti-seismic reinforcing devices, and discloses a bridge external prestressing anti-seismic reinforcing device which comprises a base and a supporting frame, prestressing tendons are fixedly installed on the inner side of the supporting frame, a threaded rod is in threaded connection with the interior of the supporting frame, and the threaded rod is fixedly connected with the base. The outer edges of the prestressed tendons are movably connected with prestressed tendon fixing pieces. According to the external prestressing anti-seismic reinforcing device for the bridge, a prestressing tendon can be effectively placed in a supporting frame, a sensor is rotated to the outside of an inner screw rod for expected fixation, then the inner screw rod is rotated into a fixed screw rod for tightening, knocking or other vehicle-mounted driving excitation modes, and the vibration frequency is transmitted into the sensor through a threaded rod and the fixed screw rod; the deterministic relation between the dynamic steel beam prestress value and the frequency is achieved, the prestressed tendon can be easily measured, calculated and overhauled, and the problems that most of existing frequency testing method devices are complex in structure principle, and the frequency value of the prestressed tendon cannot be rapidly tested to calculate the effective prestress are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of external prestressed earthquake-resistant reinforcement devices, in particular to an external prestressed earthquake-resistant reinforcement device for a bridge. Background Art

[0002] The external prestressed seismic reinforcement device of a bridge is a technical means to improve the seismic performance of a bridge. This type of device usually improves the mechanical properties of the bridge structure by applying prestress, thereby enhancing the seismic resistance of the bridge.

[0003] According to a bridge external prestressed reinforcement seismic device with patent number CN202222129967.2, this solution solves the problem of ensuring the precise horizontal and vertical arrangement of multiple anchor blocks to prevent uneven preload caused by uneven position arrangement.

[0004] In the process of implementing this application, the inventor found that there are at least the following problems in this technology:

[0005] 1. This type of bridge external prestressed seismic reinforcement device, when the bridge is used for too long, the bearing capacity can no longer meet the requirements of the increasing traffic volume, and it needs to be replaced or repaired. The deformation of the external prestressed tendons is inconsistent with the deformation of the concrete, which can easily cause prestress loss. Therefore, it is necessary to detect the effective prestress value of the external prestressed tendons to facilitate repairs based on the current situation. There are also some devices for testing the prestress of prestressed tendons in the prior art, but most of the devices are relatively complex, the test results are too slow, and the convenience is low.

[0006] 2. The seismic structure of the external prestressed seismic reinforcement device for the bridge is too simple in the prior art and can only be used for driving and daily use. If it is faced with an earthquake, it is in danger of partial collapse and is not strong enough. Utility Model Content

[0007] In view of the deficiencies in the prior art, the utility model provides an external prestressed seismic reinforcement device for a bridge, which has the advantages of being able to conveniently measure the prestress of prestressed tendons and containing a seismic-proof structure, thereby solving the problems raised in the background technology.

[0008] The utility model provides the following technical solution: it includes: a base and a support frame, a prestressed tendon is fixedly installed on the inner side of the support frame, a threaded rod is connected to the inner thread of the support frame, the outer edge of the prestressed tendon is movably connected to a prestressed tendon fixing plate, a connecting hole is opened on the outside of the prestressed tendon fixing plate, the threaded rod is connected to the inner thread of the connecting hole, a nut gasket and a nut are sleeved on the outside of the threaded rod, one end of the threaded rod is fixedly connected to a fixing screw, and the inner thread of the fixing screw is connected to an inner screw.

[0009] Preferably, the upper surface of the base is fixedly connected to a pier, connecting plates are fixedly connected to the four sides of the pier, side plates are fixedly connected to the two sides of the connecting plates, the top of the side plates is fixedly connected to a support plate, the top of the support plate is fixedly connected to a U-shaped steel bar, the top of the pier is fixedly connected to a pot-type bearing, and the top of the pot-type bearing is movably connected to four bolts.

[0010] Preferably, a bridge is sleeved on the outside of the bolt and the U-shaped steel bar, the left side of the bridge is clamped with the inner side of the support frame, and the internal threads of the connecting plate and the side plate are connected with a first screw.

[0011] Preferably, anti-sway frames are provided at the front and back ends of the base, and both ends of the anti-sway frames are threadedly connected with second screws, one end of the anti-sway frame is connected to the base through the second screw, and the other end of the anti-sway frame is connected to the bridge through the second screw.

[0012] Preferably, one end of the inner screw is fixedly connected with a sensor.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. The external prestressed seismic reinforcement device for the bridge comprises prestressed tendons, a support frame, a prestressed tendon fixing plate, a connection hole, a threaded rod, a nut washer, a nut, a fixing screw, a sensor and an anti-sway frame. The structure is set to effectively place the prestressed tendons in the support frame, insert the threaded rod and the fixing screw into the nut washer, the nut and the prestressed tendon fixing plate in sequence, rotate the fixing screw, drive the threaded rod and rotate it into the connection hole to fix it with the prestressed tendon fixing plate, rotate the sensor to the outside of the inner screw to fix it as expected, and then rotate the inner screw to the fixing screw. The fixed screw is tightened to form an integral device. The prestressed tendons are vibrated by knocking or other excitation methods such as vehicle driving. The vibration frequency is transmitted to the sensor through the threaded rod and the fixed screw. The prestress of the prestressed tendons is calculated through the corresponding information collection and recording equipment, thereby achieving the deterministic relationship between the prestress value of the steel bundle and the frequency. The prestressed tendons can be easily measured and repaired, which solves the problem that most of the existing frequency testing devices have complex structural principles and cannot quickly test the frequency value of the prestressed tendons to calculate the effective prestress.

[0015] 2. The extracorporeal prestressed seismic reinforcement device of the bridge comprises a base, a pier, a connecting plate, a side plate, a first screw, a supporting plate, a U-shaped steel bar, a pot-type support, a bolt and a bridge. The setting of the structure can effectively provide multi-directional seismic resistance to the bridge. The U-shaped steel bars and bolts penetrate into the base of the bridge. The seismic facilities are arranged symmetrically longitudinally and transversely around the piers. The seismic components are composed of two parts. One part of the bolts penetrates into the cast-in-place box girder, and the second part of the U-shaped steel bars penetrates into the interior of the bridge, and the lower part of the U-shaped steel bars is embedded in the interior of the pier. The upper and lower seismic resistance components are threadedly connected and are divided into transverse and longitudinal seismic resistance, which restrict the beam body from moving in two directions under force majeure. Generally, the seismic resistance structure is a concrete structure. The upper and lower parts of the anti-sway frame are connected to the base and the bridge. If an earthquake occurs and the base swings, the base is fixed, and the device is a steel component structure, which is rust-proof and corrosion-resistant, thereby achieving effective seismic resistance. The anti-sway frame can stabilize the bridge, reduce the swing amplitude, and reduce the risk of partial collapse. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the sensor of the utility model;

[0018] Figure 3 This is a schematic diagram of the U-shaped steel bar structure of the utility model;

[0019] Figure 4 For this utility model Figure 1 Schematic diagram of the structure on the right side when viewed from above.

[0020] In the figure: 1. base; 2. bridge pier; 3. connecting plate; 4. side plate; 5. first screw; 6. support plate; 7. U-shaped steel bar; 8. pot-type support; 9. bolt; 10. bridge; 11. prestressed tendon; 12. support frame; 13. prestressed tendon fixing plate; 14. connecting hole; 15. threaded rod; 16. nut washer; 17. nut; 18. fixing screw; 19. sensor; 20. anti-sway frame; 21. second screw; 22. inner screw. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-4A bridge external prestressed seismic reinforcement device comprises: a base 1 and a support frame 12, a prestressed tendon 11 is fixedly installed on the inner side of the support frame 12, a threaded rod 15 is connected to the inner thread of the support frame 12, the outer edge of the prestressed tendon 11 is movably connected to the prestressed tendon fixing plate 13, a connecting hole 14 is opened on the outside of the prestressed tendon fixing plate 13, the threaded rod 15 is connected to the inner thread of the connecting hole 14, a nut gasket 16 and a nut 17 are sleeved on the outside of the threaded rod 15, one end of the threaded rod 15 is fixedly connected to a fixing screw 18, the inner thread of the fixing screw 18 is connected to an inner screw 22, one end of the inner screw 22 is fixedly connected to a sensor 19, and the inner wall of the support frame 12 is close to the side of the prestressed tendon 11 In the process, the threaded rod 15 and the fixing screw 18 are successively inserted into the nut gasket 16, the nut 17, the support frame 12 and the prestressed tendon fixing plate 13, and the fixing screw 18 is rotated to drive the threaded rod 15 and turn it into the connecting hole 14 to fix it to the prestressed tendon fixing plate 13, and the sensor 19 is rotated to the expected outside of the inner screw 22 to be fixed, and then the inner screw 22 is turned into the fixing screw 18 and tightened, so as to form an integral device, and the prestressed tendon 11 is vibrated by knocking or other excitation methods such as vehicle driving, and the vibration frequency is transmitted to the sensor 19 through the threaded rod 15 and the fixing screw 18, and then the prestress of the prestressed tendon 11 is calculated through the corresponding information collection and recording equipment, so as to facilitate maintenance.

[0023] Among them, the upper surface of the base 1 is fixedly connected with the pier 2, the four sides of the pier 2 are fixedly connected with the connecting plates 3, the two sides of the connecting plates 3 are fixedly connected with the side plates 4, the top of the side plates 4 is fixedly connected with the supporting plates 6, the top of the supporting plates 6 is fixedly connected with the U-shaped steel bars 7, the top of the pier 2 is fixedly connected with the pot-type bearing 8, the top of the pot-type bearing 8 is movably connected with four bolts 9, the U-shaped steel bars 7 and the bolts 9 penetrate into the base of the bridge 10, the earthquake-resistant facilities are arranged symmetrically longitudinally and transversely around the pier 2, the earthquake-resistant components are composed of two parts, one part of the bolts 9 penetrates into the cast-in-place box beam, and the second part of the U-shaped steel bars 7 penetrates into the interior of the bridge 10, and the lower half of the U-shaped steel bars 7 are pre-buried in the interior of the pier 2, the upper and lower earthquake-resistant components are threadedly connected, and are divided into transverse and longitudinal earthquake-resistant, which limit the beam body from two directions and displace under force majeure. Generally, the earthquake-resistant structure is a concrete structure, while the device is a steel component structure, which is rust-proof and corrosion-resistant.

[0024] Among them, the bolts 9 and the U-shaped steel bars 7 are externally sleeved with the bridge 10, the left side of the bridge 10 is clamped with the inner side of the support frame 12, the internal threads of the connecting plate 3 and the side plate 4 are connected with the first screw 5, the U-shaped steel bar 7 is embedded in the inside of the bridge 10 and connected thereto, and is fixed with the first screw 5.

[0025] Among them, anti-sway frames 20 are provided at the front and back ends of the base 1, and both ends of the anti-sway frame 20 are threadedly connected with second screws 21. One end of the anti-sway frame 20 is connected to the base 1 through the second screw 21, and the other end of the anti-sway frame 20 is connected to the bridge 10 through the second screw 21. If an earthquake occurs and the base 1 is in a fixed state and the anti-sway frame 20 stabilizes the bridge 10, reduces the swing amplitude, and reduces the risk of partial collapse.

[0026] Working principle: when in use, insert the U-shaped steel bar 7 and the bolt 9 into the base of the bridge 10. The earthquake-resistant facilities are arranged symmetrically longitudinally and transversely around the pier 2. The earthquake-resistant components are composed of two parts. One part of the bolts 9 penetrates into the cast-in-place box beam, and the second part of the U-shaped steel bar 7 penetrates into the interior of the bridge 10, and the lower half of the U-shaped steel bar 7 is pre-buried in the interior of the pier 2. The upper and lower earthquake-resistant components are threadedly connected, and are divided into transverse and longitudinal earthquake resistance, which restricts the beam body from two directions and moves under force majeure. Generally, the earthquake-resistant structure is a concrete structure, and the device is a steel structure for rust and corrosion prevention. The inner wall of the support frame 12 is close to the side of the prestressed tendon 11, and the threaded rod 15 and the fixing screw 18 are inserted into the nut gasket 16, the nut 17, the support frame 12 and the prestressed tendon fixing plate 13 in turn, and the rotation The fixed screw 18 is moved to drive the threaded rod 15 and rotate it into the connecting hole 14 to fix it with the prestressed tendon fixing plate 13, and the sensor 19 is rotated to the expected outside of the inner screw 22 to be fixed, and then the inner screw 22 is rotated into the fixed screw 18 and tightened, so as to form an integral device. The prestressed tendon 11 is vibrated by knocking or other excitation methods such as vehicle driving, and the vibration frequency is transmitted to the sensor 19 through the threaded rod 15 and the fixed screw 18, and then the prestress of the prestressed tendon 11 is calculated through the corresponding information collection and recording equipment, so as to facilitate maintenance. The upper and lower parts of the anti-sway frame 20 are connected to the base 1 and the bridge 10. If an earthquake occurs and the base 1 is in a fixed state, the anti-sway frame 20 can stabilize the bridge 10, reduce the swing amplitude, and reduce the risk of partial collapse.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bridge external prestressed seismic reinforcement device, characterized in that: include: A base (1) and a support frame (12), wherein a prestressed tendon (11) is fixedly installed on the inner side of the support frame (12), a threaded rod (15) is connected to the inner thread of the support frame (12), the outer edge of the prestressed tendon (11) is movably connected to a prestressed tendon fixing plate (13), a connecting hole (14) is provided on the outside of the prestressed tendon fixing plate (13), the threaded rod (15) is connected to the inner thread of the connecting hole (14), a nut washer (16) and a nut (17) are sleeved on the outside of the threaded rod (15), one end of the threaded rod (15) is fixedly connected to a fixing screw (18), and the fixing screw (18) is internally threadedly connected to an inner screw (22); The upper surface of the base (1) is fixedly connected to a bridge pier (2), the four sides of the bridge pier (2) are fixedly connected to connecting plates (3), the two sides of the connecting plates (3) are fixedly connected to side plates (4), the top of the side plates (4) is fixedly connected to a support plate (6), the top of the support plate (6) is fixedly connected to a U-shaped steel bar (7), the top of the pier (2) is fixedly connected to a pot-type support (8), and the top of the pot-type support (8) is movably connected to four bolts (9); The bolts (9) and the U-shaped steel bars (7) are sleeved with a bridge (10) on the outside, the left side of the bridge (10) is clamped with the inner side of the support frame (12), and the internal threads of the connecting plate (3) and the side plate (4) are connected with a first screw (5); The front and back ends of the base (1) are both provided with anti-sway frames (20), both ends of the anti-sway frames (20) are threadedly connected with second screws (21), one end of the anti-sway frame (20) is connected to the base (1) via the second screw (21), and the other end of the anti-sway frame (20) is connected to the bridge (10) via the second screw (21); One end of the inner screw (22) is fixedly connected to a sensor (19).

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