Bridge girder anchorage anti-overturning structure

Abstract

A bridge girder anchoring anti-overturning structure comprises anchor blocks, fixed anchorage devices, pull rods, counterforce piles and anchor steel structures. The anchor blocks are symmetrically arranged on the flanges on both sides of the girder. A pair of pull rods are arranged on both sides of the girder in the bridge span range, pass through the anchor blocks and the holes in the girder from top to bottom, and are connected with the lower pre-buried counterforce piles through the anchor steel structures to form the bridge girder anti-overturning structure. With the aid of the pre-buried counterforce piles underground, when the girder has a tendency to overturn, the pull rod arranged on the edge of the girder on the upward side can exert a pulling force on the girder to avoid the overturning of the girder. The present application adopts the pull rod to provide the bridge anti-overturning resistance, can fully exert the advantages of high-strength tensile material, involves few components and small components, is convenient to operate and maintain, and has small maintenance difficulty.

Description

TECHNICAL FIELD

[0001] The application relates to a bridge reinforcing structure, in particular to a bridge beam anchoring anti-overturning structure, and belongs to the civil engineering field. BACKGROUND

[0002] The single-column pier bridge is originally commonly used in the overline bridge, the interchange and the viaduct of the municipal road of a city. Since the traffic line of the city is relatively busy, there are usually ground auxiliary roads under the bridge, so the pier column of the bridge needs to fall within a limited range. In order to save the ground space, the designer changes the conventional transverse double column into a single-column pier. However, the problem caused thereby is that the anti-overturning capacity of the bridge is insufficient under the condition of vehicle overload. Therefore, the single-column pier bridge needs to be reinforced against overturning to ensure the safety of people's lives and property.

[0003] At present, the anti-overturning reinforcing methods for the single-column pier bridge mainly include increasing the number of supports and setting additional lower supports. For example, the Chinese patent “201720890693.5” discloses a single-column pier bridge anti-overturning device, which comprises a connecting plate, a support plate, a liquid conveying pipe, a bolt, a support rod, a bolt, a triangular plate, a hydraulic device, a bottom plate, a threaded hole, a matching plate, a screw, this method uses the hydraulic mode to support the bridge beam, however, the hydraulic device has the risk of liquid leakage, at the same time, the more components also bring the problems of difficult operation, difficult maintenance and repair, etc. For another example, the Chinese patent “201820186545.X” discloses a main girder anti-overturning device for a single-column pier bridge, which comprises cantilever steel beams installed on both sides of the upper part of the single-column pier and prestressed cables connecting the cantilever steel beams and the main girder. When the overturning moment is small, the main girder is prevented from overturning by the prestressed cables and the cantilever steel beams on the same side. When the overturning moment is large, the main girder is prevented from overturning by the prestressed cables and the steel beams on both sides. However, the setting of the steel beams may invade the clearance at the bottom of the bridge, affecting the passage of high vehicles under the bridge. For another example, the Chinese patent “201721724668.6” discloses a single-column pier anti-overturning and anti-falling beam reinforcing device, which comprises a reinforcing member arranged on the side wall of the single-column pier and a support member arranged below the box girder. Through the above technical scheme, the purpose of reinforcing the single-column pier and supporting the box girder is achieved, and the overturning of the single-column pier bridge is effectively avoided. However, this reinforcing method uses a large amount of steel, which increases the structure weight and increases the cost.

[0004] In summary, the current reinforcing methods for the single-column pier bridge mainly provide support pressure, or have a large volume affecting the clearance, or have a large maintenance and repair difficulty, or have a large amount of material and high cost. Therefore, it is necessary to develop a single-column pier bridge anti-overturning reinforcing method with high reliability, simple construction, maintenance and repair and low cost. SUMMARY

[0005] The application provides a bridge beam anchoring anti-overturning structure, which comprises an anchoring block, a fixing anchor, a pull rod, a counterforce pile and an anchoring steel structure, holes are symmetrically arranged at both ends of the beam body, the pull rod is inserted into the holes, the upper end of the pull rod is anchored to the anchoring block by the fixing anchor, and the lower end of the pull rod is connected to the pre-buried counterforce pile through the anchoring steel structure, so that the bridge beam anchoring anti-overturning structure is formed, and when the beam body tends to overturn, the pull rod on the upwardly inclined side of the beam body can apply a pulling force to the beam body, so that the overturning of the beam body is avoided. The bridge beam anchoring anti-overturning structure can realize the anti-overturning reinforcement of the single-column pier bridge without interrupting the traffic, the anti-overturning resistance is provided by the pull rod, the advantages of high-strength tensile material can be fully utilized, the number of components is small, the construction operation is convenient, the maintenance difficulty is small, and the application has practical significance.

[0006] Technical scheme: a bridge beam anchoring anti-overturning structure, comprising an anchoring block, a fixing anchor, a pull rod, a counterforce pile and an anchoring steel structure, the anchoring block is symmetrically arranged on the flanges on both sides of the beam body, and the distance from the edge is arbitrary, a pair of pull rods are arranged on both sides of the beam body in the bridge span range, the pull rods are connected to the pre-buried counterforce pile through the anchoring steel structure by penetrating the anchoring block and the holes arranged in the beam body from top to bottom, and the bridge beam anchoring anti-overturning structure is formed.

[0007] The anchoring steel structure is composed of a connecting top plate, a connecting bottom plate, a pin joint bolt and a fixing nut, the pull rod is connected with the connecting top plate as a whole, the connecting top plate is provided with a pin joint hole, the connecting bottom plate is connected and fixed to the counterforce pile through anchoring steel bars, the connecting top plate and the connecting bottom plate are connected through the pin joint bolt, the two ends of the pin joint bolt are provided with the fixing nuts, and the pull rod is freely rotated around the pin joint bolt.

[0008] The counterforce pile is classified into steel piles, reinforced concrete piles, bamboo piles and wood piles according to materials, is classified into square piles, round piles and special-shaped piles, and has a solid or hollow cross section.

[0009] The pull rod is one of non-prestressed pull rods and prestressed pull rods, the tensile strength of the pull rod is not less than 500 MPa, and the pull rod is one of steel bars, steel strands, steel rods, fiber bars, fiber ropes, fiber-steel composite bars and fiber-steel composite ropes.

[0010] More than one pair of pull rods are arranged on the beam body of each span bridge, and the positions of the pull rods in the longitudinal direction of the beam body are arbitrary.

[0011] The counterforce pile is buried in the ground, and the pull rod and the counterforce pile are coaxially arranged.

[0012] The fixing anchor and the pull rod are protected by brushing protective grease, brushing protective paint or covering a protective layer.

[0013] The upper surface of the anchoring block is perpendicular to the pull rod, and the anchoring block is concrete, mortar or a metal structure. When being concrete or mortar, the anchoring block is integrally connected with the beam body by symmetrically planting a steel bar at the flanges of the beam body; when being a metal structure, the metal structure anchoring block is integrally connected with the beam body by symmetrically planting a steel bar at the flanges of the beam body.

[0014] Compared with other single-column pier overturning resistance reinforcement methods, the present application has the following advantages:

[0015] (1) The advantages of high-strength tensile materials are fully utilized.

[0016] (2) Few components are involved, the space occupied is small, the construction operation is convenient, and the maintenance difficulty is small.

[0017] (3) Traffic is not interrupted, and the impact on traffic is small.

[0018] (4) Flexible to set, the position of the pull rod can be arranged flexibly according to needs, and the adaptability is strong. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 A bridge beam anchoring anti-overturning structure, two pull rods are symmetrically arranged at the two sides of the beam body;

[0020] Figure 2 A bridge beam anchoring anti-overturning structure, two pull rods are symmetrically arranged at the two sides of the beam body at the position of the pier;

[0021] Figure 3 A bridge beam anchoring anti-overturning structure, two pull rods are symmetrically arranged at the two sides of the beam body at the position of the pier;

[0022] Figure 4 A bridge beam anchoring anti-overturning structure, two pull rods are symmetrically arranged at the two sides of the beam body at the position of the pier;

[0023] Figure 5 A bridge beam anchoring anti-overturning structure, two pull rods are symmetrically arranged at the two sides of the beam body at the position of the pier;

[0024] Figure 6 A bridge beam anchoring anti-overturning structure, two pull rods are symmetrically arranged at the two sides of the beam body at the position of the pier;

[0025] Figure 7 A bridge beam anchoring anti-overturning structure, two pull rods are symmetrically arranged at the two sides of the beam body at the position of the pier;

[0026] Figure 8 A bridge beam anchoring anti-overturning structure, two pull rods are symmetrically arranged at the two sides of the beam body at the position of the pier;

[0027] In the drawing, 1 is an anchoring block; 2 is a fixed anchor; 3 is a pull rod; 4 is a counterforce pile; 5 is an anchoring steel structure; 51 is a connecting top plate; 52 is a pin joint bolt; 53 is a fixing nut; 54 is a connecting bottom plate; and 55 is an anchoring steel bar. DETAILED DESCRIPTION

[0028] EMBODIMENT

[0029] A bridge girder anchoring anti-overturning structure comprises an anchoring block 1, a fixed anchor 2, a pull rod 3, a counterforce pile 4, and an anchoring steel structure 5. The anchoring block 1 is symmetrically arranged on the flanges on both sides of the girder, and the distance from the edge is arbitrary. One or more pairs of pull rods 3 pass through the holes in the anchoring block 1 and the girder from top to bottom on both sides of the girder within the bridge span range and are connected with the lower pre-buried counterforce pile 4 through the anchoring steel structure 5, forming a bridge girder anti-overturning structure.

[0030] The anchoring steel structure 5 is composed of a connecting top plate 51, a connecting bottom plate 54, a pin joint bolt 52, and a fixing nut 53. The pull rod 3 is connected with the connecting top plate 51 as a whole. The connecting top plate 51 is provided with a pin joint hole. The connecting bottom plate 54 is connected and fixed with the counterforce pile 4 through the anchoring steel bar 55. The connecting top plate 51 and the connecting bottom plate 54 are connected through the pin joint bolt 52. The two ends of the pin joint bolt 52 are provided with the fixing nut 53 for fixation. The pull rod 3 is free to rotate around the angle of the pin joint bolt 52.

[0031] The counterforce pile 4 is one of a steel pile, a reinforced concrete pile, a bamboo pile, and a wood pile, is one of a square pile, a round pile, and a special-shaped pile, and has a solid or hollow cross section.

[0032] The pull rod 3 is one of a non-prestressed pull rod and a prestressed pull rod, and has a tensile strength of not less than 500 MPa. The pull rod 3 is one of a steel bar, a steel strand, a steel rod, a fiber bar, a fiber cable, a fiber-steel composite bar, or a fiber-steel composite cable.

[0033] One or more pairs of pull rods 3 are arranged on the girder of each span bridge, and the positions of the pull rods 3 in the longitudinal direction of the girder are arbitrary.

[0034] The counterforce pile 4 is buried in the ground, and the pull rod 3 is coaxially arranged with the counterforce pile 4.

[0035] The fixed anchor 2 and the pull rod 3 are externally coated with protective grease, painted with protective paint, or covered with a protective layer for protection.

[0036] The upper surface of the anchoring block 1 is perpendicular to the pull rod, and the anchoring block 1 is a concrete, mortar, or metal structure.

Claims

1. A bridge beam anchorage anti-overturning structure, characterized in that... The structure includes anchor blocks (1), fixed anchors (2), tie rods (3), reaction piles (4), and anchoring steel structures (5). The anchor blocks (1) are symmetrically arranged on the flanges on both sides of the beam, with arbitrary distances from the edges. One or more tie rods (3) are arranged in pairs, passing through the anchor blocks (1) and the holes opened in the beam on both sides of the beam within the span of the bridge, and connected to the pre-embedded reaction piles (4) at the bottom through the anchoring steel structures (5) to form the anti-overturning structure of the bridge beam. The anchoring steel structures (5) consist of a connecting top plate (51), a connecting top plate (51), and a connecting top plate (52). The base plate (54), pin bolt (52) and fixing nut (53) are combined. The tie rod (3) is connected to the top plate (51) as a whole. The top plate (51) is provided with a pin hole. The base plate (54) is connected and fixed to the reaction pile (4) through the anchoring steel bar (55). The top plate (51) and the base plate (54) are connected by pin bolt (52). The two ends of the pin bolt (52) are fixed with fixing nuts (53). The tie rod (3) can rotate freely around the angle of the pin bolt (52).

2. The bridge beam anchorage anti-overturning structure as described in claim 1, characterized in that... Reaction piles (4) are classified according to materials as steel piles, reinforced concrete piles, bamboo piles, and wooden piles. They are also classified as square piles, round piles, and irregular piles, with solid or hollow cross sections.

3. The bridge beam anchorage anti-overturning structure as described in claim 1, characterized in that... The tie rod (3) is one of the non-prestressed tie rod and the prestressed tie rod. The tensile strength of the tie rod (3) is not less than 500MPa. It is one of the following: steel bar, steel strand, steel bar, fiber reinforcement, fiber cable, fiber-steel composite reinforcement or fiber-steel composite cable.

4. The bridge beam anchorage anti-overturning structure as described in claim 1, characterized in that... Tie rods (3) are installed in more than one pair on the beam of each span of the bridge, and their longitudinal positions on the beam are arbitrary.

5. The bridge beam anchorage anti-overturning structure as described in claim 1, characterized in that... The reaction pile (4) is buried in the ground, and the tie rod (3) is coaxial with the reaction pile (4).

6. The bridge beam anchorage anti-overturning structure as described in claim 1, characterized in that... Protect the exterior of the fixed anchor (2) and tie rod (3) by applying protective grease, protective paint or covering with a protective layer.

7. The bridge beam anchorage anti-overturning structure as described in claim 1, characterized in that... The upper surface of the anchor block (1) is perpendicular to the tie rod, and the anchor block (1) is a concrete, mortar or metal structure.

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