Hollow beam plate shear-resistant reinforcing structure

Abstract

The utility model discloses a hollow beam plate shear-resistant reinforcing structure which comprises a plurality of hollow beam plates arranged side by side, cavities are formed in the hollow beam plates, a filling cavity is formed between every two adjacent hollow beam plates, a grouting hole is formed in the joint of every two hollow beam plates, and the filling cavities are filled with concrete. An upper connecting plate and a lower connecting plate are arranged on the upper end face and the lower end face of the joint of every two adjacent hollow beam plates respectively, the upper connecting plates and the lower connecting plates are connected through at least two pull rod pieces, the pull rod pieces penetrate through holes of the hollow beam plates, and every two adjacent hollow beam plates are each connected with at least one pull rod piece. The transverse linkage of the hollow beam plate is improved, the hollow beam plate is prevented from independently resisting shear force, the shear resistance of the bridge beam plate is improved, the pull rod piece penetrates through the cavity of the hollow beam plate to be matched with the upper connecting plate and the lower connecting plate, the shear strength of the hollow beam plate can be further enhanced, and the shear bearing capacity of a bridge is actively improved by adopting a reinforcing structure; and the method is suitable for reinforcing the hollow structure of the bridge.

Description

Technical Field

[0001] This utility model relates to the field of bridge engineering technology, and in particular to a shear-strengthening structure for hollow beams and slabs. Background Technology

[0002] Hollow core slabs (such as prestressed hollow core slabs and composite box girders) are widely used due to their reduced self-weight and material savings. However, the internal voids reduce the effective shear cross-section of the concrete, making it prone to diagonal cracks in the web region.

[0003] Patent application number CN202110863959.8 discloses a method and device for shear reinforcement of hollow slab beams. The method includes: creating a recessed area at the upper end of the bridge; creating at least one through hole in the hinge joint of the hollow slab beam, the through hole communicating with the recessed area; fixing an upper connector at the recessed area and a lower connector at the lower end of the bridge; installing a tie rod in the through hole, the two ends of the tie rod being fixedly connected to the upper connector and the lower connector respectively; and repairing the recessed area. In this scheme, the upper connector, lower connector, and tie rod form a reinforcement component, which can enhance the lateral connection between the slab and beam, weaken the stress state of a single beam, and prevent beam and slab vibration, thereby avoiding the cracking and dispersion of the crack repair adhesive. However, the problem of reduced shear section caused by the internal voids of the hollow beam and slab is not effectively solved. At the same time, only the upper and lower connectors are used to enhance the lateral connection of the hollow beam and slab, so the lateral connection on the side of the hollow beam and slab is not effectively enhanced. Therefore, this application proposes a shear reinforcement structure for hollow beam and slab to solve the above problems. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a shear-strengthening structure for hollow beams and slabs.

[0005] To solve the above-mentioned technical problems, this utility model includes multiple hollow beams arranged side by side. The hollow beams have cavities inside, and a filling cavity is formed between two adjacent hollow beams. A grouting hole is formed at the junction of two hollow beams, and the grouting hole communicates with the filling cavity. The filling cavity is filled with concrete. An upper connecting plate and a lower connecting plate are respectively provided on the upper and lower end faces of the junction of two adjacent hollow beams. The upper connecting plate and the lower connecting plate are connected by at least two tie rods. The tie rods pass through the cavities of the hollow beams, and at least one tie rod is connected to each of the two adjacent hollow beams.

[0006] Preferably, the hollow beam slab has a strip groove on its side and at least one groove on the side above the strip groove. The groove communicates with the strip groove. The strip grooves of two adjacent hollow beam slabs are joined to form a filling cavity, and the grooves of two adjacent hollow beam slabs are joined to form a grouting hole.

[0007] Preferably, the bottom of the strip groove is provided with a pre-embedded rib, the length of the pre-embedded rib is greater than the depth of the strip groove, and the pre-embedded ribs in the strip grooves on both sides of the hollow beam plate are staggered.

[0008] Preferably, the strip groove is provided with several partitions along its length, and the partitions are integrally cast with the hollow beam slab.

[0009] Preferably, the hollow beam plate has at least two rows of through holes along the length of the cavity.

[0010] Preferably, multiple upper connecting plates are provided and are evenly distributed along the length direction of the hollow beam slab, and the upper connecting plates are staggered from the grouting holes.

[0011] Preferably, the lower connecting plate is a single plate that covers the entire bottom surface of the hollow beam plate.

[0012] Preferably, the tie rod includes a tie rod, the two ends of which pass through the hollow beam plate, the upper connecting plate and the lower connecting plate and are connected to high-strength anchor bolts.

[0013] The beneficial effects of this utility model are as follows: This utility model, through the upper connecting plate, lower connecting plate, and tie rod, combined with the concrete filling the cavity, improves the lateral connection of the hollow beam slab, avoids the hollow beam slab resisting shear force alone, and greatly improves the shear resistance of the bridge beam slab. At the same time, the tie rod passing through the cavity of the hollow beam slab, together with the upper and lower connecting plates, can further enhance the shear strength of the hollow beam slab. The reinforcement structure actively improves the shear bearing capacity of the bridge. The construction is minimally invasive and has good durability, making it suitable for the reinforcement of hollow bridge structures. Attached Figure Description

[0014] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the hollow beam-slab structure of this utility model;

[0016] Figure 3 This is a schematic plan view of the overall structure of this utility model.

[0017] In the diagram: 1. Hollow beam slab; 2. Void; 3. Filling cavity; 4. Grouting hole; 5. Upper connecting plate; 6. Lower connecting plate; 7. Tie rod; 8. High-strength anchor bolt; 9. Strip groove; 10. Cable trough; 11. Embedded reinforcement; 12. Partition plate; 13. Through hole. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. All directional indicators (such as up, down, left, right, front, back, etc.) in the present utility model are only used to explain the relative positional relationship and movement of each component in a certain posture (as shown in the accompanying drawings). If the specific posture changes, the directional indicator will also change accordingly.

[0019] like Figure 1-3 As shown, this embodiment provides a shear-strengthening structure for hollow beams and slabs, including multiple hollow beams and slabs 1 arranged side by side. The hollow beams and slabs 1 have cavities 2 inside, which are arranged along the length of the hollow beams and slabs 1. A filling cavity 3 is formed between two adjacent hollow beams and slabs 1. A grouting hole 4 is formed at the junction of two hollow beams and slabs 1. The grouting hole 4 is connected to the filling cavity 3. Concrete is filled into the filling cavity 3 through the grouting hole 4. An upper connecting plate 5 and a lower connecting plate 6 are respectively provided on the upper and lower end faces of the junction of two adjacent hollow beams and slabs 1. The upper connecting plate 5 and the lower connecting plate 6 are connected by at least two tie rods 7. The two tie rods 7 are respectively provided at both ends of the upper connecting plate 5 and the lower connecting plate 6. The tie rods 7 pass through the cavities 2 of the hollow beams and slabs 1, and at least one tie rod 7 is connected to each of the two adjacent hollow beams and slabs 1.

[0020] Furthermore, a strip groove 9 is provided on the side of the hollow beam slab 1, and at least one wire groove 10 is provided on the side of the hollow beam slab 1 above the strip groove 9. The wire groove 10 is connected to the strip groove 9. The strip grooves 9 of two adjacent hollow beam slabs 1 are joined to form a filling cavity 3, and the wire grooves 10 on two adjacent hollow beam slabs 1 are joined to form a grouting hole 4. After the hollow beam slabs 1 are attached and arranged, concrete is filled into the filling cavity 3 through the grouting hole 4. The concrete is used to strengthen the connection between the two adjacent hollow beam slabs 1 to enhance the shear resistance. Furthermore, embedded bars 11 are provided at the bottom of the strip groove 9. There are two rows of embedded bars 11, and the length of the embedded bars 11 extending out is greater than the depth of the strip groove 9. The embedded bars 11 in the strip groove 9 on both sides of the hollow beam slab 1 are staggered. After the two strip grooves 9 are fitted together to form the filling cavity 3, the embedded bars 11 on the two hollow beam slabs 1 are staggered. The embedded bars 11 are connected to the steel reinforcement structure inside the hollow beam slab 1. In this way, after the concrete is injected, the connection between the two hollow beam slabs 1 can be enhanced, and the shear and bending strength at the junction of the hollow beam slabs 1 can be improved.

[0021] Furthermore, the strip groove 9 is provided with several partitions 12 along its length. The partitions 12 are integrally cast with the hollow beam slab 1. The partitions 12 divide the strip groove 9 into several cavities along its length. The longitudinal section of the strip groove 9 is trapezoidal. In this way, the filling cavity 3 will be divided into several sealed cavities, which can further improve the connection strength and shear strength of the two hollow beam slabs 1.

[0022] Furthermore, the hollow beam slab 1 has two rows of through holes 13 along the length of the cavity 2. The through holes 13 are used for the tie rods 7 to pass through. The two rows of through holes 13 are respectively connected to one end of the upper connecting plate 5 and the lower connecting plate 6, thereby connecting two adjacent hollow beam slabs 1 together through the upper connecting plate 5 and the lower connecting plate 6. In order to improve the connection strength, more rows of through holes 13 can be added. And multiple through holes 13 are set at equal intervals in each row. Multiple matching upper connecting plates 5 are also set and are distributed at equal intervals along the length of the hollow beam slab 1. The upper connecting plates 5 are staggered from the grouting holes 4 so as not to obstruct the later grouting. The lower connecting plate 6 is set as a single one and covers the entire bottom surface of the hollow beam slab 1. The lower connecting plate 6 adopts an integral structure, which can enhance the connection of the hollow beam slab 1 and seal the lower end of the filling cavity 3 to prevent grout leakage.

[0023] Furthermore, the tie rod 7 includes a tie rod 7, the two ends of which pass through the hollow beam plate 1, the upper connecting plate 5 and the lower connecting plate 6 and are connected to high-strength anchor bolts 8. Specifically, both ends of the tie rod 7 are provided with threaded sections, and the high-strength anchor bolts 8 are made of high-strength nuts. After the tie rod 7 passes through the through hole 13, the threaded sections at both ends of the tie rod 7 pass through the upper connecting plate 5 and the lower connecting plate 6 respectively, and are then fixed to both ends of the tie rod 7 by the nuts, thereby fixing the tie rod 7 to the hollow beam plate 1.

[0024] Its working principle is as follows: Multiple hollow beams 1 are erected side by side between piers or supporting beams. Tie rods 7 pass through the through holes 13 through the hollow beams 1. Upper connecting plates 5 and lower connecting plates 6 are installed and fixed with nuts. Then, concrete is injected into the filling cavity 3 through the grouting holes 4. Through the upper connecting plates 5, lower connecting plates 6 and tie rods 7, in conjunction with the concrete in the filling cavity 3, the lateral connection of the hollow beams 1 is improved, avoiding the hollow beams 1 resisting shear force alone, and greatly improving the shear resistance of the bridge beams. At the same time, the tie rods 7 passing through the holes 2 of the hollow beams 1, in conjunction with the upper connecting plates 5 and lower connecting plates 6, can further enhance the shear strength of the hollow beams 1. The reinforcement structure actively improves the shear bearing capacity of the bridge. The construction is minimally invasive and has good durability, making it suitable for the reinforcement of hollow bridge structures.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A shear-strengthening structure for hollow beams and slabs, comprising multiple hollow beams and slabs arranged side by side, wherein the hollow beams and slabs have cavities inside, characterized in that, A filling cavity is formed between two adjacent hollow beams, and a grouting hole is formed at the junction of the two hollow beams. The grouting hole communicates with the filling cavity, which is filled with concrete. An upper connecting plate and a lower connecting plate are respectively provided on the upper and lower end faces of the junction of two adjacent hollow beams. The upper connecting plate and the lower connecting plate are connected by at least two tie rods. The tie rods pass through the holes in the hollow beams, and each of the two adjacent hollow beams is connected to at least one tie rod.

2. The shear-strengthening structure for hollow beams and slabs according to claim 1, characterized in that, The hollow beam slab has a strip groove on its side and at least one wire groove on the side above the strip groove. The wire groove is connected to the strip groove. The strip grooves of two adjacent hollow beam slabs are joined to form a filling cavity, and the wire grooves of two adjacent hollow beam slabs are joined to form a grouting hole.

3. The shear-strengthening structure for hollow beams and slabs according to claim 2, characterized in that, The bottom of the strip groove is provided with embedded bars, the length of which extends beyond the depth of the strip groove, and the embedded bars in the strip grooves on both sides of the hollow beam slab are staggered.

4. The shear-strengthening structure for hollow beams and slabs according to claim 3, characterized in that, The strip groove is provided with several partitions along its length, and the partitions are integrally cast with the hollow beam slab.

5. The shear-strengthening structure for hollow beams and slabs according to claim 1, characterized in that, The hollow beam slab has at least two rows of through holes along the length of the cavity.

6. The shear-strengthening structure for hollow beams and slabs according to claim 1, characterized in that, The upper connecting plate is provided in multiple ways and is distributed at equal intervals along the length of the hollow beam plate. The upper connecting plate is staggered from the grouting hole.

7. The shear-strengthening structure for hollow beams and slabs according to claim 1, characterized in that, The lower connecting plate is configured as a single plate that covers the entire bottom surface of the hollow beam slab.

8. A hollow beam-slab shear reinforcement structure according to claim 1, characterized in that, The tie rod includes a tie rod, the two ends of which pass through the hollow beam plate, the upper connecting plate and the lower connecting plate and are connected to high-strength anchor bolts.

Images