Adjustable prestressed bridge anti-overturning device

Abstract

The utility model discloses an adjustable prestress bridge anti-overturning device which comprises a vase pier, a support and a steel box girder, the steel box girder is connected to the top of the vase pier, the support is supported between the vase pier and the steel box girder, vertically-arranged lower hollow pipes are symmetrically embedded in the two sides of the arc section of the top of the vase pier, and the lower hollow pipes are connected with the vase pier. The upper end of the lower hollow pipe penetrates to the top face of the vase pier. The upper hollow pipe and the lower hollow pipe are symmetrically arranged on the two sides of the vase pier and the two sides of the steel box girder, the upper threaded steel bar and the lower threaded steel bar are arranged in the upper hollow pipe and the lower hollow pipe in a penetrating mode, the distance between the upper threaded steel bar and the lower threaded steel bar can be adjusted through rotation of the threaded sleeve, and then the prestress between the steel box girder and the vase pier is adjusted. The steel box girder is tightly connected to the top face of the vase pier, the overturning force of the bridge can be effectively resisted, and the stress requirements of the bridge under different working conditions are met; the flexible filling material can prevent rainwater and sundries from entering gaps between the hollow pipes and the steel bars, corrosion of the steel bars is avoided, and the service life of the device is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to bridge engineering technical field especially, and it relates to a adjustable pre-stressed bridge anti-overturning device. BACKGROUND

[0002] In the field of bridge engineering, with the continuous growth of traffic flow and the increasing complexity of vehicle load, the safety of bridge structure is facing severe challenges, among which the anti-overturning problem of bridge is particularly prominent. The traditional bridge anti-overturning design and device have many limitations:

[0003] Poor structural adaptability: some early built bridges do not fully consider the diversified traffic conditions and the increasing heavy vehicle load in the design, and their original anti-overturning structure is relatively simple, which is difficult to effectively cope with complex working conditions. When encountering special circumstances such as eccentric load, strong wind, earthquake, etc., the bridge is prone to overturning risk, which threatens traffic safety.

[0004] Insufficient adjustment capacity: after the conventional anti-overturning device is installed, it is often difficult to flexibly adjust according to the actual stress change, uneven settlement and other conditions of the bridge. Once the bridge structure appears slight deformation or abnormal stress, these fixed devices cannot adapt in time, which greatly reduces their anti-overturning effect, and long-term accumulation may cause serious safety hazards.

[0005] Poor durability: the bridge is exposed to natural environment for a long time, and is affected by rain erosion, sunlight exposure, temperature change and other factors. Some traditional anti-overturning devices use materials with poor weather resistance, which are prone to corrosion, aging and other problems, thereby reducing the mechanical properties and reliability of the device. For example, after some metal connecting parts rust, their strength and connection tightness decrease, which cannot effectively play the role of anti-overturning.

[0006] Therefore, it is an important task in the field of bridge engineering technology to develop an adjustable pre-stressed bridge anti-overturning device that can overcome the above-mentioned defects and has good adaptability, adjustability and durability. CONTENT OF THE UTILITY MODEL

[0007] In view of the problems existing in the prior art, the purpose of the utility model is to provide an adjustable pre-stressed bridge anti-overturning device.

[0008] To solve the above problems, the utility model adopts the following technical scheme:

[0009] The utility model provides an adjustable prestressed bridge anti-overturning device, including vase piers, support and steel box girder, the steel box girder is connected at vase piers top, the support supports between vase piers and steel box girder, the vase piers top circular segment both sides symmetry pre -buried have the vertical setting lower hollow tube, the lower hollow tube upper end penetrates to vase piers top surface, and the lower end penetrates to vase piers top circular segment lateral wall outside, the steel box girder both sides symmetry pre -buried have the upper hollow tube that penetrates through steel box girder, when the steel box girder is connected at vase piers top, the upper hollow tube with lower hollow tube is coaxial correspondence, the upper threaded rebar is arranged in the upper hollow tube, and the lower threaded rebar is arranged in the lower hollow tube, the upper threaded rebar upper end is connected with the upper fastening nut, and the upper fastening nut abuts at steel box girder top surface, the lower threaded rebar lower end is connected with the lower fastening nut, and the lower fastening nut abuts at vase piers top circular segment lateral wall outside below, and the threaded sleeve is connected between the lower threaded rebar upper end and the upper threaded rebar lower end, when the threaded sleeve rotates, the upper threaded rebar and the lower threaded rebar are close to or away from each other, and the gap of the upper hollow tube and the upper threaded rebar and the gap of the lower hollow tube and the lower threaded rebar are filled with flexible filling material.

[0010] Preferably, the flexible filling material is weather-resistant glue or foaming glue.

[0011] Preferably, a groove is formed on the lateral wall of the circular segment of the vase piers top, the lower end of the lower hollow tube penetrates into the groove, the lower fastening nut abuts on the groove bottom, and a cover plate is arranged at the opening of the groove.

[0012] Preferably, the groove bottom is provided with a local reinforcing steel mesh.

[0013] Preferably, a stiffening plate is arranged around the upper end of the upper hollow tube below the top surface of the steel box girder.

[0014] Preferably, a cover is arranged on the upper threaded rebar and the upper fastening nut.

[0015] Preferably, the upper hollow tube and the lower hollow tube are both galvanized steel pipes.

[0016] Preferably, the upper threaded rebar and the lower threaded rebar are both 1080-grade prestressed threaded rebars.

[0017] Preferably, the cover plate is an aluminum cover plate with a thickness of 1.2 mm.

[0018] The utility model has the advantages of:

[0019] Compared with the prior art, the utility model has the advantages of:

[0020] The utility model discloses a hollow pipe and lower hollow pipe are set up to the both sides of vase pier and steel box girder, and the upper threaded steel bar and lower threaded steel bar are arranged in the hollow pipe and lower hollow pipe, and the threaded sleeve rotation can adjust the upper threaded steel bar and lower threaded steel bar spacing, and then adjust the prestress between steel box girder and vase pier, make steel box girder closely connect in vase pier top surface, can effectively resist bridge overturning force, adapt to the stress demand of bridge under different working conditions, and flexible filling material can prevent rain, sundries and enter the hollow pipe and steel bar gap, avoid the rust of steel bar, prolong the service life of device. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the structure schematic diagram of the utility model;

[0022] Figure 2 It is the side view of the utility model;

[0023] Figure 3 It is Figure 1 It is the partial close -up of A in the middle;

[0024] Figure 4 It is Figure 1 It is the partial close -up of B in the middle.

[0025] In the drawing: 1, vase pier;11, lower hollow pipe;12, lower threaded steel bar;13, lower fastening nut;14, recess;15, cover plate;16, local reinforcing steel mesh;2, support;3, steel box girder;31, upper hollow pipe;32, upper threaded steel bar;33, upper fastening nut;34, stiffened plate;35, cover;4, threaded sleeve;5, flexible filling material. DETAILED DESCRIPTION

[0026] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative efforts belong to the range of protection of the utility model.

[0027] As Figures 1-4The utility model provides a kind of technical scheme shown: an adjustable prestressed bridge anti-overturning device, including vase pier 1, support 2 and steel box girder 3, the steel box girder 3 is connected at vase pier 1 top, the support 2 is supported between vase pier 1 and steel box girder 3, the vase pier 1 top arc segment both sides are symmetrically embedded with the vertically arranged lower hollow tube 11, the lower hollow tube 11 upper end penetrates to vase pier 1 top surface, and lower end penetrates to vase pier 1 top arc segment side wall outside, the steel box girder 3 both sides are symmetrically embedded with the upper hollow tube 31 vertically penetrating steel box girder 3, when the steel box girder 3 is connected at vase pier 1 top, the upper hollow tube 31 and lower hollow tube 11 are coaxial correspondence, the upper threaded steel bar 32 is arranged in the upper hollow tube 31, the lower threaded steel bar 12 is arranged in the lower hollow tube 11, the upper threaded steel bar 32 upper end is screw-connected with upper fastening nut 33, the upper fastening nut 33 is abutted at steel box girder 3 top surface, the lower threaded steel bar 12 lower end is screw-connected with lower fastening nut 13, the lower fastening nut 13 is abutted at vase pier 1 top arc segment side wall outside lower side, and the upper threaded steel bar 32 lower end and the lower threaded steel bar 12 upper end are screw-connected with threaded sleeve 4 between coaxial, when the threaded sleeve 4 rotates, the upper threaded steel bar 32 and the lower threaded steel bar 12 are mutually close or away, and the gap in the upper hollow tube 31 and the upper threaded steel bar 32 and the gap in the lower hollow tube 11 and the lower threaded steel bar 12 are filled with flexible filling material 5.

[0028] The utility model discloses a kind of technical scheme shown: an adjustable prestressed bridge anti-overturning device, including vase pier 1, support 2 and steel box girder 3, the steel box girder 3 is connected at vase pier 1 top, the support 2 is supported between vase pier 1 and steel box girder 3, the vase pier 1 top arc segment both sides are symmetrically embedded with the vertically arranged lower hollow tube 11, the lower hollow tube 11 upper end penetrates to vase pier 1 top surface, and lower end penetrates to vase pier 1 top arc segment side wall outside, the steel box girder 3 both sides are symmetrically embedded with the upper hollow tube 31 vertically penetrating steel box girder 3, when the steel box girder 3 is connected at vase pier 1 top, the upper hollow tube 31 and lower hollow tube 11 are coaxial correspondence, the upper threaded steel bar 32 is arranged in the upper hollow tube 31, the lower threaded steel bar 12 is arranged in the lower hollow tube 11, the upper threaded steel bar 32 upper end is screw-connected with upper fastening nut 33, the upper fastening nut 33 is abutted at steel box girder 3 top surface, the lower threaded steel bar 12 lower end is screw-connected with lower fastening nut 13, the lower fastening nut 13 is abutted at vase pier 1 top arc segment side wall outside lower side, and the upper threaded steel bar 32 lower end and the lower threaded steel bar 12 upper end are screw-connected with threaded sleeve 4 between coaxial, when the threaded sleeve 4 rotates, the upper threaded steel bar 32 and the lower threaded steel bar 12 are mutually close or away, and the gap in the upper hollow tube 31 and the upper threaded steel bar 32 and the gap in the lower hollow tube 11 and the lower threaded steel bar 12 are filled with flexible filling material 5.

[0029] Specifically, the flexible filling material 5 adopts weather-resistant glue or foaming glue. In use, the weather-resistant glue or foaming glue is injected into the gap between the upper hollow pipe 31 and the upper threaded steel bar 32 and the gap between the lower hollow pipe 11 and the lower threaded steel bar 12 through a glue gun, so as to prevent rainwater and sundries from entering the gap between the hollow pipe and the steel bar, avoid the corrosion of the steel bar, and prolong the service life of the device. The weather-resistant glue or foaming glue has good weather resistance, sealing property and flexibility; the weather-resistant glue can maintain stable performance under various climate conditions, effectively seal the gap, and prevent moisture, dust and the like from invading; the foaming glue has good filling property and can play a buffering and sealing role after curing, further enhancing the protection performance of the device and protecting the steel bar from external erosion and maintaining the structural stability.

[0030] Further, a groove 14 is formed in the top arc segment side wall of the vase pier 1, the lower end of the lower hollow pipe 11 penetrates into the groove 14, the lower fastening nut 13 abuts against the groove bottom of the groove 14, and a cover plate 15 is arranged at the opening of the groove 14, so that the lower end of the lower threaded steel bar 12 and the lower fastening nut 13 are arranged in the groove 14 and protected by the cover plate 15, preventing them from being eroded by rainwater or colliding with external objects and prolonging the service life of the components.

[0031] Further, a local reinforcing steel mesh 16 is arranged on the groove bottom of the groove 14, which enhances the bearing capacity of the groove bottom of the groove 14, avoids the cracking and damage of the concrete of the vase pier 1 caused by the long-term extrusion of the lower fastening nut 13, guarantees the integrity of the structure, and improves the reliability and durability of the connection part between the entire anti-overturning device and the vase pier 1.

[0032] Further, a stiffening plate 34 is arranged around the upper end of the upper hollow pipe 31 below the top surface of the steel box girder 3, which enhances the local rigidity of the steel box girder 3 at the upper hollow pipe 31, improves the ability of the steel box girder 3 to resist deformation, enables the prestress transmitted by the upper threaded steel bar 32 to be more effectively dispersed to the overall structure of the steel box girder 3, improves the stability of the bridge structure, and reduces the influence of local deformation on the anti-overturning performance of the bridge.

[0033] Further, a cover 35 is arranged on the upper threaded steel bar 32 and the upper fastening nut 33. The cover 35 can protect the upper end of the upper threaded steel bar 32 and the upper fastening nut 33, prevent them from being eroded by the concrete and asphalt pavement of the bridge deck, avoid the corrosion of the thread affecting the adjustment function, and also prevent accidental collision from causing damage to the thread.

[0034] Specifically, the upper hollow pipe 31 and the lower hollow pipe 11 both adopt galvanized steel pipes, which have good corrosion resistance and can effectively resist the erosion of rainwater, air and the like to the upper hollow pipe 31 and the lower hollow pipe 11, prolonging the service life of the upper and lower hollow pipes.

[0035] Specifically, the upper threaded steel bars 32 and the lower threaded steel bars 12 are both 1080-grade prestressed threaded steel bars, which have high strength and good prestressed performance and can bear greater tension, thereby providing strong prestress for the bridge and enhancing the overturning resistance of the bridge.

[0036] Specifically, the cover plate 15 is made of 1.2mm-thick aluminum, which is light in weight and convenient to install and maintain, and the aluminum has good corrosion resistance, can effectively protect the components in the groove, and has sufficient strength to resist general external impact.

[0037] Although the embodiments of the utility model have been shown and described, it can be understood by those of ordinary skill in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. An adjustable pre-stressed bridge anti-overturning device, characterized in that, The utility model provides a kind of vase pier (1), support (2) and steel box girder (3), the steel box girder (3) is connected at vase pier (1) top, the support (2) is supported between vase pier (1) and steel box girder (3), the lower hollow tube (11) of vertical arrangement is symmetrically embedded in the side wall of the circular segment of vase pier (1) top, the lower hollow tube (11) upper end penetrates to vase pier (1) top surface, lower end penetrates to the side wall outside of the circular segment of vase pier (1) top, the upper hollow tube (31) of vertical penetration steel box girder (3) is symmetrically embedded in the both sides of steel box girder (3), when the steel box girder (3) is connected at vase pier (1) top, the upper hollow tube (31) and lower hollow tube (11) are coaxial correspondence, the upper threaded steel bar (32) is arranged in the upper hollow tube (31), the lower threaded steel bar (12) is arranged in the lower hollow tube (11), the upper threaded steel bar (32) upper end is threadedly connected with upper fastening nut (33), the upper fastening nut (33) is abutted on the surface of steel box girder (3) top, the lower threaded steel bar (12) lower end is threadedly connected with lower fastening nut (13), the lower fastening nut (13) is abutted below the outside of the circular segment side wall of vase pier (1) top, the threaded sleeve (4) is threadedly connected between the lower end of coaxial upper threaded steel bar (32) and the upper end of lower threaded steel bar (12), when the threaded sleeve (4) rotates, the upper threaded steel bar (32) and lower threaded steel bar (12) are close to each other or away from each other, the gap of the upper hollow tube (31) and upper threaded steel bar (32) and the gap of the lower hollow tube (11) and lower threaded steel bar (12) are filled with flexible filling material (5).

2. The adjustable pre-stressed bridge roll-over prevention device of claim 1, wherein, The flexible filling material (5) is weather-resistant glue or foaming glue.

3. The adjustable pre-stressed bridge roll-over prevention device of claim 1, wherein, The circular segment side wall of vase pier (1) top is provided with groove (14), the lower end of lower hollow tube (11) penetrates into groove (14), the lower fastening nut (13) is abutted on the groove bottom of groove (14), the groove (14) opening is provided with cover plate (15).

4. The adjustable pre-stressed bridge roll-over prevention device of claim 3, wherein, The groove bottom of groove (14) is provided with local reinforcing steel mesh (16).

5. The adjustable pre-stressed bridge roll-over protection device of claim 1, wherein, The top surface of steel box girder (3) is provided with stiffening plate (34) below the upper end of upper hollow tube (31).

6. The adjustable pre-stressed bridge roll-over protection device of claim 1, wherein, The upper threaded steel bar (32) and upper fastening nut (33) are covered with cover (35).

7. The adjustable pre-stressed bridge roll-over protection device of claim 1, wherein, The upper hollow tube (31) and lower hollow tube (11) are both galvanized steel pipes.

8. The adjustable pre-stressed bridge roll-over protection device of claim 1, wherein, The upper threaded steel bar (32) and lower threaded steel bar (12) are both 1080-grade prestressed threaded steel bars.

9. The adjustable pre-stressed bridge roll-over prevention device of claim 3, wherein, The cover plate (15) is a 1.2mm thick aluminum cover plate.

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