Structure and construction method for strengthening existing single-column piers against overturning

Abstract

The present invention discloses a structure and construction method for the anti-overturning reinforcement of an existing single-column pier; a wire rope tightening device is provided at the gap between the bridge superstructure and the single-column pier; the wire rope tightening device comprises a wire rope and a tightening plate; a plurality of tightening plates are alternately arranged along the gap, the tightening plates close to both ends of the wire rope are anchor tightening plates, and the remaining are sliding tightening plates; the sliding tightening plate is provided with an intermediate wire steering component; the anchor tightening plate is provided with an end wire steering component; the wire rope is inserted from a corresponding anchor tightening plate, and then alternately passes through all the sliding tightening plates on both sides of the gap one by one, and finally passes through another anchor tightening plate, and the two ends are tensioned and tightened by anchors and then fixed. The present invention realizes the rapid anti-overturning reinforcement of an existing single-column pier bridge structure.

Description

Technical Field

[0001] The invention relates to the technical field of single-column bridge pier reinforcement, and in particular to a structure and a construction method for facilitating the anti-overturning reinforcement of an existing single-column pier. Background Art

[0002] Affected by the terrain, ground space and landscape, single-column bridge piers were often used in the past to reduce floor space, improve the layout of the substructure, and reduce the position conflict between the bridge foundation and the ground road. Especially when conditions are limited, this type of bridge pier often becomes the first or only choice.

[0003] Although the stress performance of the upper and lower structures of the single-column pier bridge meets the requirements of the relevant bridge design specifications, since the lateral support system of the pier column is supported by one fulcrum or two adjacent and close fulcrums, the safety reserve of the structure's anti-overturning stability is not sufficient to resist the overturning load of an overloaded vehicle, causing a safety hazard of overturning of the entire bridge superstructure.

[0004] Therefore, how to ensure that existing bridges have sufficient anti-overturning performance with the lowest investment and also facilitate subsequent maintenance and replacement has become a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0005] In view of the above-mentioned defects of the prior art, the present invention provides a structure and a construction method for facilitating the anti-overturning reinforcement of existing single-column piers. The purpose of the present invention is to realize the rapid anti-overturning reinforcement of the existing single-column pier bridge structure with a simple structure and convenient implementation operation, thereby ensuring that the existing bridge has sufficient anti-overturning performance and facilitating subsequent maintenance and replacement.

[0006] To achieve the above-mentioned purpose, the present invention discloses a structure that is convenient for reinforcing an existing single-column pier against overturning; the structure is arranged between each single-column pier and its corresponding bridge superstructure; the outer side surfaces on both sides of each bridge superstructure and the outer side surfaces on both sides of the corresponding single-column pier form an angle of less than 180 degrees, and there is a gap between the bridge superstructure and the corresponding single-column pier.

[0007] Wherein, a wire rope tightening device is provided between the outer side surface of each side of each bridge superstructure and the outer side surface of the corresponding single column pier;

[0008] Each of the steel wire rope tightening devices comprises a steel wire rope and a plurality of tightening plates for passing the steel wire rope;

[0009] A plurality of the tightening plates are alternately arranged along the gap, the two tightening plates closest to the two ends of the corresponding steel wire rope are anchor tightening plates, and all the remaining tightening plates are sliding tightening plates;

[0010] Each of the sliding tightening plates is provided with an intermediate wire steering component, so that both ends of the inserted wire rope are at an angle less than 30 degrees, and both ends of the inserted wire rope extend toward the two tightening plates closest to the other side of the gap;

[0011] Each of the anchoring and tightening plates is provided with an end wire steering component, so that one end of the threaded wire rope extends toward the sliding tightening plate closest to the other side of the corresponding joint, and the other end extends toward the anchoring piece;

[0012] Each of the steel wire ropes passes through a corresponding one of the anchoring and tightening plates, then passes through all the sliding tightening plates alternately on both sides of the gap, and finally passes through another anchoring and tightening plate, and both ends are tensioned and tightened by the anchors and then fixed.

[0013] Preferably, each of the intermediate wire steering components is a fixed pulley, a hard buckle or a semicircular hard pipe;

[0014] Each of the end wire steering components is a tensioning steering pipe.

[0015] Preferably, the alternating arrangement means that: a tightening plate is provided at a position between every two adjacent tightening plates on the outer side surface of the single-column pier corresponding to the outer side surface of the corresponding bridge superstructure, or a tightening plate is provided at a position between every two adjacent tightening plates on the outer side surface of the bridge superstructure corresponding to the outer side surface of the single-column pier.

[0016] More preferably, the plurality of tightening plates located on the outer side surface of the single-column pier and the plurality of tightening plates located on the outer side surface of the bridge superstructure are arranged in a straight line parallel to the gap.

[0017] More preferably, each of the tightening plates is fixed to the corresponding bridge superstructure or the corresponding single-column pier by bolts or embedded reinforcement.

[0018] The present invention also provides a construction method for strengthening an existing single-column pier against overturning, comprising the following steps:

[0019] Step 1: prefabricate all the tightening plates, including all the anchor tightening plates and all the sliding tightening plates, and perform anti-corrosion treatment on all of them;

[0020] Step 2, alternately arranging all the tightening plates between the bridge superstructure and the corresponding single column pier along the gap;

[0021] Step 3, the steel wire ropes are inserted from a corresponding one of the anchoring and tightening plates, then alternately pass through all the sliding tightening plates on both sides of the gap, and finally pass out from another anchoring and tightening plate, and both ends are tensioned and tightened by the anchors and then fixed;

[0022] Step 4: Complete anti-overturning reinforcement.

[0023] Beneficial effects of the present invention:

[0024] The application of the present invention can realize the rapid anti-overturning reinforcement of the existing single-column pier bridge structure with a simple structure and convenient implementation operation mode, ensure that the existing bridge has sufficient anti-overturning performance, and facilitate subsequent maintenance and replacement.

[0025] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A structural schematic diagram showing the cross-sectional position of a bridge superstructure in one embodiment of the present invention.

[0027] Figure 2 A schematic structural diagram of a single-column pier applied to a middle pier of a continuous beam in one embodiment of the present invention is shown.

[0028] Figure 3 A schematic structural diagram showing a single column pier applied to a continuous beam side pier in one embodiment of the present invention.

[0029] Figure 4 A schematic diagram of the structure in which a tightening plate is fixed by bolts in one embodiment of the present invention is shown.

[0030] Figure 5 A schematic structural diagram of a sliding tightening plate in one embodiment of the present invention is shown.

[0031] Figure 6 A schematic structural diagram of an anchoring and tightening plate in one embodiment of the present invention is shown. DETAILED DESCRIPTION

[0032] Example

[0033] like Figures 1 to 6 As shown, a structure is provided for reinforcing an existing single-column pier against overturning; it is arranged between each single-column pier and its corresponding bridge superstructure; the outer side surfaces on both sides of each bridge superstructure and the outer side surfaces on both sides of the corresponding single-column pier are at an angle of less than 180 degrees, and there is a gap between the bridge superstructure 2 and the corresponding single-column pier 1.

[0034] Wherein, a wire rope tightening device is provided between the outer side surface of each side of each bridge superstructure 2 and the outer side surface of the corresponding single column pier 1;

[0035] Each wire rope tightening device comprises a wire rope 3 and a plurality of tightening plates 4 for passing the wire rope 3;

[0036] A plurality of tightening plates 4 are alternately arranged along the gap, the two tightening plates 4 closest to the two ends of the corresponding steel wire rope 3 are anchor tightening plates 5, and all the remaining tightening plates 4 are sliding tightening plates 6;

[0037] Each sliding tightening plate 6 is provided with an intermediate wire steering component 7, so that both ends of the inserted wire rope 3 are at an angle less than 30 degrees, and both ends of the inserted wire rope 3 extend toward the two tightening plates 4 closest to the other side of the gap;

[0038] Each anchoring and tightening plate 5 is provided with an end wire steering component 8, so that one end of the wire rope 3 is extended to the sliding tightening plate 6 closest to the other side of the corresponding joint, and the other end is extended to the anchor 9;

[0039] Each steel wire rope 3 is inserted from a corresponding anchoring and tightening plate 5, and then passes through all the sliding tightening plates 6 alternately on both sides of the gap one by one, and finally passes out from another anchoring and tightening plate 5, and both ends are tensioned and tightened by anchors 9 and then fixed.

[0040] The sliding tightening plate 6 provided with the intermediate wire steering component 7 in the present invention facilitates the wire rope 3 to smoothly perform reverse curve bending, and the value of the turning bending radius is not less than the minimum bending radius of the wire rope 3;

[0041] The anchoring tightening plate 5 provided with the end wire steering component 8 is used to smoothly turn the wire rope 3 from an inclined linear shape to a vertical one, so as to facilitate anchoring by tensioning.

[0042] In actual application, each steel wire rope 3 is inserted into the end wire steering component 8 of the anchor tightening plate 5 on one side of the bridge superstructure 2, and is alternately serpentine-shaped and reciprocated on both sides of the gap, and finally passes out from the end wire steering component 8 of the other anchor tightening plate 5 and is tensioned and tightened by the anchor 9 and then fixed.

[0043] When the bridge superstructure 2 shows a tendency to overturn, the steel wire rope 3 on the tilted side is tightened to provide tension to hold the bridge superstructure 2, thereby providing a stabilizing moment and preventing the superstructure from overturning.

[0044] In some embodiments, each intermediate wire steering member 7 is a fixed pulley, a hard ring buckle or a semicircular hard pipe;

[0045] Each end wire steering component 8 is a tension steering pipe.

[0046] In some embodiments, the alternating arrangement means that a tightening plate 4 is provided on the outer side surface of the single-column pier 1 at a position between every two adjacent tightening plates 4 on the outer side surface of the corresponding bridge superstructure 2, or a tightening plate 4 is provided on the outer side surface of the bridge superstructure 2 at a position between every two adjacent tightening plates 4 on the outer side surface of the corresponding single-column pier 1.

[0047] In some embodiments, the plurality of tensioning plates 4 located on the outer side of the monocolumn 1 and the plurality of tensioning plates 4 located on the outer side of the bridge superstructure 2 are arranged in a straight line parallel to the gap.

[0048] In some embodiments, each tightening plate 4 is fixed to the corresponding bridge superstructure 2 or the corresponding single-column pier 1 by bolts 10 or embedded reinforcement.

[0049] The present invention also provides a construction method for strengthening an existing single-column pier against overturning, comprising the following steps:

[0050] Step 1, prefabricate all the tightening plates 4, including all the anchor tightening plates 5 and all the sliding tightening plates 6, and perform anti-corrosion treatment on all of them;

[0051] Step 2, alternately arranging all the tightening plates 4 along the gap between the bridge superstructure 2 and the corresponding single column pier 1;

[0052] Step 3, the steel wire rope 3 is inserted from a corresponding anchoring and tightening plate 5, and then passes through all the sliding tightening plates 6 alternately on both sides of the gap, and finally passes through another anchoring and tightening plate 5, and both ends are tensioned and tightened by anchors 9 and then fixed;

[0053] Step 4: Complete anti-overturning reinforcement.

[0054] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A structure for strengthening the existing single-column pier against overturning; arranged between each single-column pier (1) and its corresponding bridge superstructure (2); the outer side surfaces on both sides of each bridge superstructure (2) and the outer side surfaces on both sides of the corresponding single-column pier (1) form an angle of less than 180 degrees, and there is a gap between the bridge superstructure (2) and the corresponding single-column pier (1); Features: A steel wire rope tightening device is provided between the outer side surface of each side of each bridge superstructure (2) and the outer side surface of the corresponding single-column pier (1); Each of the steel wire rope tightening devices comprises a steel wire rope (3) and a plurality of tightening plates (4) for passing the steel wire rope (3); A plurality of the tightening plates (4) are alternately arranged along the gap, the two tightening plates (4) closest to the two ends of the corresponding steel wire rope (3) are both anchor tightening plates (5), and all the remaining tightening plates (4) are all sliding tightening plates (6); Each of the sliding tightening plates (6) is provided with an intermediate wire steering component (7), so that both ends of the inserted steel wire rope (3) are at an angle less than 30 degrees, and both ends of the inserted steel wire rope (3) extend toward the two tightening plates (4) closest to each other on the other side of the gap; Each of the anchoring and tightening plates (5) is provided with an end wire steering component (8), so that one end of the inserted wire rope (3) extends toward the sliding tightening plate (6) closest to the other side of the corresponding joint, and the other end extends toward the anchor (9); Each of the steel wire ropes (3) is inserted from a corresponding one of the anchoring and tightening plates (5), then alternately passes through all the sliding and tightening plates (6) on both sides of the gap, and finally passes out from another anchoring and tightening plate (5), and both ends are tensioned and tightened by the anchoring piece (9) and then fixed; Each of the intermediate wire steering components (7) is a fixed pulley, a hard ring buckle or a semicircular hard pipe; Each of the end wire steering components (8) is a tension steering pipe; The alternating arrangement means that: a tightening plate (4) is provided at a position between every two adjacent tightening plates (4) on the outer side surface of the single-column pier (1) corresponding to the outer side surface of the corresponding bridge superstructure (2), or a tightening plate (4) is provided at a position between every two adjacent tightening plates (4) on the outer side surface of the bridge superstructure (2) corresponding to the outer side surface of the corresponding single-column pier (1); The plurality of tightening plates (4) located on the outer side of the single-column pier (1) and the plurality of tightening plates (4) located on the outer side of the bridge superstructure (2) are arranged in a straight line parallel to the gap.

2. The structure for strengthening the existing single-column pier against overturning according to claim 1, It is characterized in that Each of the tightening plates (4) is fixed to the corresponding bridge superstructure (2) or the corresponding single-column pier (1) by means of bolts (10) or embedded reinforcement.

3. The construction method for the structure for strengthening the existing single-column pier against overturning according to claim 1, It is characterized in that The steps include: Step 1: prefabricate all the tightening plates (4), including all the anchor tightening plates (5) and all the sliding tightening plates (6), and perform anti-corrosion treatment on all of them; Step 2, alternately arranging all the tightening plates (4) along the gap between the bridge superstructure (2) and the corresponding single-column pier (1); Step 3, the steel wire rope (3) is inserted from a corresponding one of the anchoring and tightening plates (5), then passes through all the sliding and tightening plates (6) alternately on both sides of the gap, and finally passes out from another anchoring and tightening plate (5), and both ends are tensioned and tightened by the anchor (9) and then fixed; Step 4: Complete anti-overturning reinforcement.

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