Rapid reinforcing system for existing railway cracked bridge pier
By adopting wrap-around and interlocking reinforcement systems on railway bridges, prestressed loading is solved by using steel strips and combined I-steel components in the existing technology, the problem of difficult reinforcement and interruption of operation is achieved in the existing technology, and a fast and safe bridge reinforcement effect is achieved.
Patent Information
- Application Number
- CN202421425972.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-21
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-06-21
AI Technical Summary
The existing railway bridge reinforcement technology has problems such as difficult construction, long reinforcement cycle and the need to interrupt train operations, and cannot effectively solve cracks that affect structural safety.
A rapid reinforcement system is adopted, including a wrap-around closed-loop reinforcement system and a paired open-loop reinforcement system. It uses steel strips, combined I-steel, prestressed crude steel bars and fastening nuts and other components to increase the contact stress and additional compressive stress of concrete through prestressing loading and tensioning, and improve crack resistance.
A rapid and simple reinforcement process is achieved, construction can be carried out immediately without interrupting transportation, and the safety and crack resistance of the structure are improved, and it has great economic benefits.
Smart Images
Figure CN222666602U_ABST
Abstract
Description
Technical Field
[0001] The utility model is mainly applied to the technical field of railway bridge reinforcement, and specifically relates to a rapid reinforcement system for cracked railway bridge piers; it can also be extended to the crack reinforcement of highway bridge piers. Background Art
[0002] In recent decades, there have been many railway construction projects and bridges are widely distributed. Vertical cracks in bridge piers caused by load, improper construction measures, climate and environment and other factors often occur. Currently, the main reinforcement measures for severe vertical cracks include steel plate bonding, carbon fiber wrapping, and increasing cross-section.
[0003] However, the above method has problems such as great construction difficulty and long reinforcement period in engineering application. Moreover, for cracks that affect structural safety, it is necessary to stop train operation before reinforcement construction, which causes operational losses to transportation companies. Summary of the invention
[0004] The utility model is proposed to solve the problems existing in the prior art, and its purpose is to provide a rapid reinforcement system for cracked bridge piers of existing railways.
[0005] The technical solution of the utility model is: a rapid reinforcement system for cracked bridge piers of existing railways, comprising a first reinforcement system and a second reinforcement system, wherein the first reinforcement system is a surrounding closed-loop reinforcement system, in which a JLL connector for prestressed loading is arranged; and the second reinforcement system is a spliced open-loop reinforcement system, in which a fastening nut for prestressed loading is arranged.
[0006] Furthermore, the first reinforcement system includes a steel belt, which is wrapped around the cracked pier body and the outer wall of the pallet. A natural rubber sheet is lined under the steel belt to ensure that the steel belt is in close contact with the pallet and the pier body. Steel belt connectors are provided at both ends of the steel belt.
[0007] Furthermore, the steel belt connecting piece includes a flange, the flange at the end of the steel belt is connected to the steel belt, and the flange is spliced by L-shaped steel, a pad, and a stiffening rib plate.
[0008] Furthermore, the steel strip is bent to fit the outer contour of the section of the pier that needs to be reinforced.
[0009] Furthermore, the flange is provided with a first prestressed coarse steel bar, and the first prestressed coarse steel bars at both ends are connected through a JLL connector and prestressed loading is performed.
[0010] Furthermore, the flange and the steel belt are connected by welding.
[0011] Furthermore, the second reinforcement system includes two combined I-beams, a second prestressed thick steel bar connecting the two, and a fastening nut for fixing.
[0012] Furthermore, the combined I-beam is clamped as a shoulder beam on the outer edge of the pier cap parallel to the cracked section, and the second prestressed coarse steel bar passes through the I-beam and is anchored on the outer side of the I-beam.
[0013] Furthermore, a hole is punched at the end of the combined I-beam and a second prestressed coarse steel bar is inserted therethrough. The second prestressed coarse steel bar is tensioned and anchored by a torque wrench and a fastening nut to load external prestressing force on the top cap of the diseased pier.
[0014] The beneficial effects of the utility model are as follows:
[0015] The utility model utilizes the combined I-beams and steel strips on both sides of the top cap and the tray in conjunction with the coarse steel bars for tensioning, thereby increasing the contact stress between the cracked concrete and generating additional compressive stress, thereby improving the anti-cracking ability of the structure and providing an active reinforcement measure.
[0016] The thick steel bars in the reinforcement system of the utility model are fastened by fastening nuts, and the tensioning force can be adjusted according to actual use conditions.
[0017] The utility model has the advantages of simple structure and fast construction, and construction can be started immediately after cracks are found without interrupting transportation.
[0018] The utility model has great advantages in safety, convenience, speed, economy, etc., and will surely achieve good technical effects and economic benefits after popularization and application. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a front schematic diagram of the utility model;
[0020] Figure 2 It is a side schematic diagram of the utility model;
[0021] in:
[0022] 1 Steel strip 2 First prestressed thick steel bar
[0023] 3JLL connector 4 flange
[0024] 5 Second prestressed coarse steel bar 6 Combined I-beam
[0025] 7 Stabilizer 8 Top cap
[0026] 9 trays. DETAILED DESCRIPTION
[0027] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and embodiments:
[0028] like Figure 1 to Figure 2 As shown, a rapid reinforcement system for cracked bridge piers of existing railways is characterized in that it includes a first reinforcement system and a second reinforcement system, the first reinforcement system is a surrounding closed-loop reinforcement system, and the first reinforcement system is provided with a JLL connector 3 for prestressed loading; the second reinforcement system is a spliced open-loop reinforcement system, and the second reinforcement system is provided with a fastening nut for prestressed loading.
[0029] The first reinforcement system includes a steel belt 1, which is wrapped around the cracked pier body and the outer wall of the pallet. The steel belt 1 is lined with a natural rubber sheet to ensure that the steel belt 1 is in close contact with the pallet and the pier body. Steel belt connectors are provided at both ends of the steel belt 1.
[0030] The steel belt connecting piece includes a flange 4. The flange 4 at the end of the steel belt 1 is connected to the steel belt 1. The flange 4 is formed by splicing an L-shaped steel, a pad, and a stiffening rib plate.
[0031] The steel strip 1 is bent and fitted according to the outer contour of the cross section of the pier that needs to be reinforced.
[0032] The flange 4 is provided with a first prestressed coarse steel bar 2 , and the first prestressed coarse steel bars 2 at both ends are connected via a JLL connector 3 and are prestressed.
[0033] The flange 4 and the steel belt 1 are connected by welding.
[0034] The second reinforcement system includes two combined I-beams 6, a second prestressed thick steel bar 5 connecting the two, and a fastening nut for fixing.
[0035] Specifically, the number of the second prestressed coarse steel bars 5 may be but is not limited to four, and the number of the fastening nuts is twice the number of the second prestressed coarse steel bars 5 .
[0036] The combined I-beam 6 is clamped as a shoulder beam on the outer edge of the pier cap parallel to the cracked section, and the second prestressed coarse steel bar 5 penetrates the I-beam 6 and is anchored on the outer side of the I-beam.
[0037] The end of the combined I-beam 6 is punched with a hole and penetrated with the second prestressed coarse steel bar 5, which is tensioned and anchored by a torque wrench and a fastening nut to load external prestressing force on the top cap of the diseased pier.
[0038] Specifically, the first reinforcement system is used to reinforce bridge piers with arc-shaped cross-sections.
[0039] More specifically, the first reinforcement system is used to reinforce circular cross-section piers, round-end cross-section piers, and irregular slope cross-section piers, and the number can be increased or decreased according to the damage situation.
[0040] Specifically, the second reinforcement system is used to reinforce bridge piers whose cross-sections include parallel straight lines.
[0041] More specifically, the second reinforcement system is used to reinforce a rectangular section.
[0042] As an implementation method
[0043] The first reinforcement system includes a steel belt 1 wrapped around the outer contour of the pier. There are multiple steel belts 1. Flanges 4 are provided at both ends of each steel belt 1. First prestressed coarse steel bars 2 are provided between the flanges 4. JLL connectors 3 for connecting and loading prestress are provided between the first prestressed coarse steel bars 2.
[0044] As another embodiment
[0045] The first reinforcement system includes a steel belt 1 wrapped around the outer contour of the pier. The steel belt 1 is a single piece. Both ends of the steel belt 1 are provided with multiple flanges 4. The flanges 4 at both ends are grouped in a one-to-one manner. A first prestressed coarse steel bar 2 is provided between each group of flanges 4. JLL connectors 3 for connecting and loading prestress are provided between the first prestressed coarse steel bars 2. The steel belt 1 and the multiple first prestressed coarse steel bars 2 form a closed-loop reinforcement system.
[0046] Specifically, when the steel belt 1 is used to reinforce the slope outer contour of the bridge pier, a stabilizer 7 is provided outside the steel belt 1 to prevent the steel belt 1 from vertically sliding.
[0047] Specifically, the stabilizer 7 is a support structure welded from thick steel plates and stiffening ribs. The stabilizer 7 is supported on the closed-loop reinforcement system of the connecting section between the pier body and the pallet to offset the additional sliding effect generated when the closed-loop reinforcement system on the pallet applies prestress.
[0048] Specifically, the first reinforcement system and the second reinforcement system can also be used in combination, such as Figure 1 As shown, the first reinforcement system is used to reinforce the tray 9 of the pier, and the second reinforcement system is used to reinforce the top cap 8 of the pier.
[0049] Similarly, the first reinforcement system and the second reinforcement system can also be used independently.
[0050] Specifically, in the second reinforcement system, corresponding perforations are formed on the top and bottom wing plates of the combined I-beam 6, and the second prestressed coarse steel bars 5 pass through the perforations in turn, and are tensioned and anchored by tightening nuts with a torque wrench to load external prestress on the top cap of the diseased pier.
[0051] Specifically, a buckle groove is welded on the bottom wing plate of the combined I-beam 6 , and the buckle groove cover is buckled on the top cap 8 .
[0052] Specifically, the straight length of the combined I-beam 6 is greater than the length of the contact surface of the pier, and at least two second prestressed thick steel bars 5 are arranged in the single-side protruding section of the combined I-beam 6.
[0053] Specifically, the first reinforcement system and the second reinforcement system in the present invention are implemented by factory layout and production and on-site installation.
[0054] The utility model utilizes the combined I-beams and steel strips on both sides of the top cap and the tray in conjunction with the coarse steel bars for tensioning, thereby increasing the contact stress between the cracked concrete and generating additional compressive stress, thereby improving the anti-cracking ability of the structure and providing an active reinforcement measure.
[0055] The thick steel bars in the reinforcement system of the utility model are connected by fastening nuts or JLL connectors, and the tensioning force can be adjusted according to actual use conditions.
[0056] The utility model has the advantages of simple structure and fast construction, and construction can be started immediately after cracks are found without interrupting transportation.
[0057] The utility model has great advantages in safety, convenience, speed, economy, etc., and will surely achieve good technical effects and economic benefits after popularization and application.
Claims
1. A rapid reinforcement system for cracked bridge piers on existing railways, characterized by: The invention comprises a first reinforcement system and a second reinforcement system, wherein the first reinforcement system is a surrounding closed-loop reinforcement system, and a JLL connector (3) for prestressing is arranged in the first reinforcement system; and the second reinforcement system is a spliced open-loop reinforcement system, and a fastening nut for prestressing is arranged in the second reinforcement system.
2. The rapid reinforcement system for cracked bridge piers of existing railways according to claim 1 is characterized by: The first reinforcement system comprises a steel belt (1), the steel belt (1) being sheathed around the cracked pier body and the outer wall of the pallet, the steel belt (1) being lined with a natural rubber sheet to ensure close contact between the steel belt (1) and the pallet and the pier body, and steel belt connectors being provided at both ends of the steel belt (1).
3. The rapid reinforcement system for cracked bridge piers of existing railways according to claim 2 is characterized by: The steel belt connecting piece comprises a flange (4), the flange (4) at the end of the steel belt (1) is connected to the steel belt (1), and the flange (4) is formed by splicing L-shaped steel, a pad, and a stiffening rib plate.
4. The rapid reinforcement system for cracked bridge piers of existing railways according to claim 2 is characterized by: The steel strip (1) is bent and fitted according to the outer contour of the cross section of the bridge pier that needs to be reinforced.
5. The rapid reinforcement system for cracked bridge piers of existing railways according to claim 3 is characterized by: The flange (4) is provided with a first prestressed coarse steel bar (2), and the first prestressed coarse steel bars (2) at both ends are connected via a JLL connector (3) and are prestressed.
6. The rapid reinforcement system for cracked bridge piers of existing railways according to claim 3 is characterized by: The flange (4) and the steel belt (1) are connected by welding.
7. The rapid reinforcement system for cracked bridge piers of existing railways according to claim 1 is characterized by: The second reinforcement system comprises two combined I-beams (6), a second prestressed thick steel bar (5) connecting the two, and a fastening nut for fixing.
8. The rapid reinforcement system for cracked bridge piers of existing railways according to claim 7 is characterized by: The combined I-beam (6) is clamped as a shoulder beam on the outer edge of the bridge pier cap parallel to the cracked section, and the second prestressed coarse steel bar (5) passes through the I-beam (6) and is anchored on the outer side of the I-beam.
9. The rapid reinforcement system for cracked bridge piers of existing railways according to claim 8, characterized in that: The end of the combined I-beam (6) is punched with a hole and a second prestressed coarse steel bar (5) is inserted therethrough; the second prestressed coarse steel bar (5) is tensioned and anchored by means of a torque wrench and a tightening nut, thereby applying an external prestress to the top cap of the diseased bridge pier.