Freeze-thaw-resistant rail transit precast beam plate with high durability

Abstract

The utility model discloses a rail transit precast beam plate with high freeze-thaw resistance and durability, which relates to the technical field of building construction, and comprises a beam plate body, one end of the beam plate body is fixedly connected with a plurality of connecting bulges, the other side of the beam plate body is provided with connecting grooves matched with the connecting bulges, and the connecting bulges are fixedly connected with the beam plate body. According to the prefabricated beam plate connecting structure, through combination of various connecting structures such as the connecting groove, the connecting protrusion, the positioning mechanism and the elastic connecting mechanism, the stability of connection between prefabricated beam plates is enhanced, and the prefabricated beam plate connecting structure has the advantages of being simple in structure, convenient to use and high in practicability. According to the prefabricated beam plate, train operation vibration and various complex stress can be effectively resisted, the problems of looseness, cracking and the like of the connecting position are reduced, the stability of the structure is improved, the service life of the structure is prolonged, rainwater falling on the surface of the beam plate body can be rapidly drained through the arranged drainage mechanism, water residues are reduced, and the freeze-thaw resistance durability of the prefabricated beam plate can be improved.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, specifically to a precast beam slab for rail transit with high freeze-thaw resistance and durability. Background Technology

[0002] In rail transit construction, precast beams are crucial structural components, and their performance and ease of installation significantly impact the overall project quality and schedule. Traditional precast beam designs have some shortcomings in their mechanical structure design. For example, the connections between beams are not always robust enough, and under long-term train vibration and various complex stress conditions, loosening and cracking can easily occur at the connections, affecting the structure's stability and service life. Furthermore, precast beams do not readily drain rainwater during use, leaving a significant amount of water on their surface, which can negatively impact their freeze-thaw resistance and further reduce their lifespan. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a precast beam slab for rail transit with high freeze-thaw resistance and durability, thus solving the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: a precast rail transit beam with high freeze-thaw resistance and durability, comprising a beam body, a plurality of connecting protrusions fixedly connected to one end of the beam body, a connecting groove that mates with the connecting protrusions on the other side of the beam body, a positioning mechanism provided between the connecting protrusions and the connecting groove, an elastic connecting mechanism installed between the connecting protrusions and the connecting groove, and a hydrophobic mechanism provided on the outer surface of the beam body;

[0005] The hydrophobic mechanism includes inclined surfaces on both sides of the outer surface of the beam plate body, and an inwardly concave arc surface at the bottom of the beam plate body.

[0006] Preferably, the top of the beam body is provided with multiple drainage holes, which penetrate the beam body and are connected to the bottom of the beam body to facilitate the drainage of rainwater from the top of the beam body.

[0007] Preferably, the positioning mechanism includes dovetail blocks fixedly connected to both sides of the connecting protrusion, and dovetail grooves that cooperate with the dovetail blocks are provided on both sides of the inner wall of the connecting groove, which can position the installation of the connecting protrusion.

[0008] Preferably, a first embedded steel plate is provided between the beam body and the connecting protrusion, and a second embedded steel plate is provided inside the beam body and below the connecting groove, which can increase the structural strength of the beam body.

[0009] Preferably, the elastic connection mechanism includes bolts symmetrically installed through the connecting protrusion and the connecting groove, with a nut threaded onto the top of each bolt. The bolts pass through the corresponding first and second embedded steel plates, facilitating the fixing of the connection position of the two beam-plate bodies.

[0010] Preferably, the outer surface of the bolt is fitted with an elastic sleeve, and both ends of the bolt are fitted with elastic washers, which can increase the elastic buffering performance of the connection part and thus improve the service life.

[0011] This utility model provides a precast beam slab for rail transit with high freeze-thaw resistance and durability. It possesses the following characteristics:

[0012] Beneficial effects:

[0013] 1. This type of precast rail transit beam with high freeze-thaw resistance and durability, through the combination of various connection structures such as connecting grooves, connecting protrusions, positioning mechanisms and elastic connection mechanisms, greatly enhances the stability of the connection between precast beams, can effectively resist train running vibration and various complex forces, reduce the occurrence of problems such as loosening and cracking at the connection, and improve the stability and service life of the structure.

[0014] 2. This type of precast rail transit beam with high freeze-thaw resistance and durability can quickly drain rainwater falling on the surface of the beam through a drainage mechanism, reducing moisture residue and thus improving the freeze-thaw resistance and durability of the precast beam. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of this utility model from another angle;

[0017] Figure 3 This is a schematic diagram of the internal structure of the elastic connection mechanism of this utility model.

[0018] In the figure, 1. Beam and slab body; 2. Connecting protrusion; 3. Connecting groove; 4. Inclined surface; 5. Arc surface; 6. Drainage hole; 7. Dovetail block; 8. Dovetail groove; 9. First embedded steel plate; 10. Second embedded steel plate; 11. Bolt; 12. Nut; 13. Elastic sleeve; 14. Elastic washer. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Example:

[0021] like Figures 1 to 3 As shown, a precast beam slab for rail transit with high freeze-thaw resistance and durability includes a beam slab body 1. One end of the beam slab body 1 is fixedly connected with a plurality of connecting protrusions 2. The other side of the beam slab body 1 is provided with a connecting groove 3 that mates with the connecting protrusions 2. A positioning mechanism is provided between the connecting protrusions 2 and the connecting groove 3. An elastic connecting mechanism is installed between the connecting protrusions 2 and the connecting groove 3. A water-repellent mechanism is provided on the outer surface of the beam slab body 1.

[0022] The drainage mechanism includes inclined surfaces 4 on both sides of the outer surface of the beam-slab body 1, and an inwardly recessed arc surface 5 at the bottom of the beam-slab body 1. Multiple drainage holes 6 are provided at the top of the beam-slab body 1, penetrating the beam-slab body 1 and connecting to the bottom of the beam-slab body 1. This allows for rapid drainage of rainwater falling on the surface of the beam-slab body, reducing moisture residue and thus improving the freeze-thaw resistance of the precast beam-slab.

[0023] The positioning mechanism includes dovetail blocks 7 fixedly connected to both sides of the connecting protrusion 2, and dovetail grooves 8 that mate with the dovetail blocks 7 are provided on both sides of the inner wall of the connecting groove 3. A first embedded steel plate 9 is provided between the beam body 1 and the connecting protrusion 2, and a second embedded steel plate 10 is provided inside the beam body 1 and below the connecting groove 3. During installation, the cooperation of the dovetail blocks 7 and the dovetail grooves 8 can increase the stability of the connection between the precast beams and slabs, and the first and second embedded steel plates can increase the structural strength of the beam body.

[0024] The flexible connection mechanism includes bolts 11 symmetrically installed inside the connecting protrusion 2 and the connecting groove 3. A nut 12 is threaded onto the top of each bolt 11, and the bolts 11 pass through the corresponding first embedded steel plate 9 and second embedded steel plate 10. An elastic sleeve 13 is fitted onto the outer surface of each bolt 11, and elastic washers 14 are fitted onto both ends of each bolt 11. The cooperation of the bolts 11 and nuts 12 facilitates the connection and fixation of the two precast beams. Furthermore, the elastic sleeves 13 and elastic washers 14 effectively resist train vibrations and various complex forces, reducing the occurrence of loosening and cracking at the connection points, and improving the stability and service life of the structure.

[0025] Working principle: During installation, the corresponding connecting protrusion 2 is inserted into the corresponding connecting groove 3. At this time, the dovetail block 7 will also be inserted into the corresponding dovetail groove 8. The cooperation between the dovetail block 7 and the dovetail groove 8 can increase the stability of the connection between the precast beams and slabs. The first and second embedded steel plates can increase the structural strength of the beam body. Then, the bolts 11 and nuts 12 facilitate the connection and fixation of the two precast beams and slabs. The elastic sleeve 13 and elastic gasket 14 can effectively resist the vibration of train operation and various complex forces, reduce the occurrence of loosening and cracking at the connection, improve the stability and service life of the structure, and the first and second embedded steel plates can increase the structural strength of the beam body.

[0026] During use, the drainage holes 6 at the top, the sloping surfaces 4 on both sides, and the arc surface 5 at the bottom not only allow for rapid drainage but also reduce rainwater residue, thereby improving the freeze-thaw resistance and durability of the precast beams and slabs.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0028] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A rail transit precast beam slab with high resistance to freeze-thaw durability, comprising a beam slab body (1), characterized in that: One end of the beam plate body (1) is fixedly connected with a plurality of connecting protrusions (2), the other side of the beam plate body (1) is provided with a connecting groove (3) matched with the connecting protrusions (2), a positioning mechanism is arranged between the connecting protrusions (2) and the connecting groove (3), and an elastic connecting mechanism is arranged between the connecting protrusions (2) and the connecting groove (3). The hydrophobic mechanism comprises inclined surfaces (4) provided on both sides of the outer surface of the beam plate body (1), and an arc surface (5) is provided in the bottom of the beam plate body (1) and recessed inward. 2.The rail transit precast beam slab with high freeze-thaw durability according to claim 1, wherein: A plurality of drainage holes (6) are provided in the top of the beam plate body (1), the drainage holes (6) penetrate the beam plate body (1) and are communicated with the lower part of the beam plate body (1). 3.The rail transit precast beam slab with high freeze-thaw durability according to claim 1, wherein: The positioning mechanism comprises dovetail blocks (7) fixedly connected on both sides of the connecting protrusions (2), and dovetail grooves (8) matched with the dovetail blocks (7) are provided on the inner walls of the connecting groove (3).

4. The rail transit precast beam slab with high freeze-thaw durability according to claim 1, characterized in that: A first embedded steel plate (9) is arranged between the beam plate body (1) and the connecting protrusion (2), and a second embedded steel plate (10) is arranged inside the beam plate body (1) and below the connecting groove (3). 5.The rail transit precast beam slab with high freeze-thaw durability according to claim 4, characterized in that: The elastic connecting mechanism comprises bolts (11) symmetrically penetrating and arranged inside the connecting protrusions (2) and the connecting groove (3), nuts (12) threadedly connected with the top ends of the bolts (11), and the bolts (11) penetrate the corresponding first embedded steel plate (9) and the second embedded steel plate (10). 6.The rail transit precast beam slab with high freeze-thaw durability according to claim 5, wherein: An elastic sleeve (13) is sleeved on the outer surface of the bolt (11), and elastic washers (14) are sleeved on both ends of the bolt (11).

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