Prefabricated concrete superposed beam

Abstract

The utility model discloses a prefabricated concrete superposed beam, and relates to the technical field of superposed beams. Comprising a first beam body and a second beam body, a first connecting block is fixed to one end of the first beam body, a second connecting block is fixed to one end of the second beam body, a third connecting block is fixed to the other end of the second beam body, corresponding grooves are formed in the top ends of the first connecting block and the third connecting block, and an inserting block is fixed to the bottom end of the second connecting block; and the insertion blocks are inserted into the corresponding grooves. The first beam body and the second beam body are arranged, the first beam body can be installed on the edge, the second beam body can be installed in the middle, the second beam body is spliced with the first beam body and other second beam bodies, and the second beam body and the second beam body are spliced through the second connecting block, the first connecting block and the third connecting block. The first beam body and the second beam body can be driven by a crane to move downwards, so that the inserting blocks at the bottom ends of the second connecting blocks are inserted into the corresponding grooves, splicing is achieved, and left-right movement is not needed.

Description

Technical Field

[0001] The utility model relates to the technical field of composite beams, and particularly relates to a precast concrete composite beam. Background Technique

[0002] When the floor structure is a precast slab assembled floor, in order to reduce the height occupied by the structure and increase the building headroom, the cross-section of the frame beam is often cruciform or basket-shaped. In the assembled integral frame structure, the precast beam is often made into a T-shaped cross-section. After the precast slab is installed in place, a part of concrete is cast again to form the so-called composite beam. An existing composite beam (publication number: CN210049464U) has the following disadvantages in use:

[0003] During the splicing process, by aligning two composite beam bodies and then inserting the insertion blocks on one side of one composite beam into the insertion slots of the other composite beam, the splicing is achieved by left and right translation. However, in a narrow space or a specific environment, left and right splicing may not be easy to operate, affecting the construction efficiency. Therefore, this patent proposes a precast concrete composite beam to solve the above problems. Content of the Utility Model

[0004] The purpose of the utility model is to provide a precast concrete composite beam to solve the problems put forward in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A precast concrete composite beam, comprising a first beam body and a second beam body. A first connection block is fixed at one end of the first beam body, a second connection block is fixed at one end of the second beam body, a third connection block is fixed at the other end of the second beam body. Corresponding slots are opened at the tops of the first connection block and the third connection block, and an insertion block is fixed at the bottom end of the second connection block. The insertion block is inserted into the corresponding slot.

[0006] Preferably, an installation slot is opened at the top end of the second connection block, a connection slot is opened inside the second connection block, the installation slot is communicated with the connection slot, a slot is opened through the bottom end of the connection slot, screw rods are fixed at the tops of the first connection block and the third connection block, and nuts are screwed on the outer walls of the screw rods.

[0007] Preferably, the nut is located in the connection slot, and the bottom end of the nut contacts the bottom end of the connection slot.

[0008] Preferably, a plurality of internal longitudinal bars are fixed in both the first beam body and the second beam body, and stirrups are fixed on the outer walls of the internal longitudinal bars.

[0009] Preferably, a plurality of external longitudinal bars are fixed in both the first beam body and the second beam body, reinforcing bars are fixed between the external longitudinal bars, a plurality of vertical bars are fixed at the tops of the external longitudinal bars, and hooks are fixed between adjacent vertical bars.

[0010] Preferably, the other end of the first beam body is fixed with a mounting plate, and a plurality of mounting holes are formed in the mounting plate.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] By providing the first beam body and the second beam body, the first beam body can be installed at the edge, and the second beam body can be installed in the middle position. Moreover, the second beam body is spliced with the first beam body and other second beam bodies. By providing the second connecting block, the first connecting block and the third connecting block, the first beam body and the second beam body can be driven downward by a crane, so that the inserting block at the bottom end of the second connecting block is inserted into the corresponding slot to achieve splicing. It does not need to move left and right. For some narrow spaces or specific environments, splicing up and down is more convenient, avoiding affecting the splicing efficiency of the laminated beam.

[0013] In addition, by screwing the nut into the outer wall of the screw rod from the installation groove, the nut contacts the bottom end of the connection groove, realizing the fixation between the beam bodies, which is convenient for on-site rapid installation and saves time. If maintenance or modification is required, the nut can be quickly disassembled from the outer wall of the screw rod, with high flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0015] Figure 2 is a schematic diagram of the connection groove structure of the present utility model;

[0016] Figure 3 is a schematic diagram of the slot structure of the present utility model;

[0017] Figure 4 is a schematic diagram of the hook structure of the present utility model.

[0018] In the figure: 1, the first beam body; 2, the second beam body; 3, the first connecting block; 4, the second connecting block; 5, the third connecting block; 6, the screw rod; 7, the nut; 8, the installation groove; 9, the connection groove; 10, the slot; 11, the inserting block; 12, the corresponding slot; 13, the internal longitudinal reinforcement; 14, the stirrup; 15, the external longitudinal reinforcement; 16, the reinforcing rib; 17, the hook. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0020] When the floor structure is a precast slab assembled floor, in order to reduce the height occupied by the structure and increase the building net clearance, the cross-section of the frame beam is often cruciform or basket-shaped. In the assembled integral frame structure, the precast beam is often made into a T-shaped cross-section. After the precast slab is installed in place, a part of concrete is cast again to form the so-called composite beam. After the composite beam is precast in the factory, it can be quickly assembled on site, with good quality control and a short construction period. The design of the composite beam can optimize the use of materials, reduce the self-weight, and at the same time provide a larger span. The precast components of the composite beam are produced in the factory and assembled quickly on site, shortening the construction period. The composite beam is produced in the factory, which can ensure higher quality standards and consistency. The design of the composite beam can usually effectively reduce the self-weight, reduce the requirements for the foundation, be suitable for large-span buildings, and can meet the needs of modern building design. Through optimization design, the use of concrete and steel bars can be reduced, and the cost can be lowered. The modular design makes the later maintenance and overhaul simpler. The precast concrete composite beam provided by the utility model can be easily moved downward by a crane in some narrow spaces through the setting of upper and lower splicing to achieve quick splicing. In addition, by rotating the nut 7 onto the outer wall of the screw 6, the fixation between the beam bodies is realized, which is convenient for quick on-site installation and saves time. If maintenance or renovation is required, the nut 7 can be quickly disassembled from the outer wall of the screw 6, with high flexibility.

[0021] As Figures 1-4 shown, the utility model provides a technical solution: a precast concrete composite beam, which includes a first beam body 1 and a second beam body 2. A first connecting block 3 is fixed at one end of the first beam body 1, a second connecting block 4 is fixed at one end of the second beam body 2, a third connecting block 5 is fixed at the other end of the second beam body 2. Corresponding slots 12 are opened at the tops of the first connecting block 3 and the third connecting block 5, and a plug 11 is fixed at the bottom end of the second connecting block 4. The plug 11 is inserted into the corresponding slot 12.

[0022] It should be noted that by setting the first beam body 1 and the second beam body 2, the first beam body 1 can be installed at the edge, and the second beam body 2 can be installed in the middle position. And the second beam body 2 is spliced with the first beam body 1 and other second beam bodies 2. By setting the second connecting block 4, the first connecting block 3 and the third connecting block 5, the first beam body 1 and the second beam body 2 can be driven downward by a crane, so that the plug 11 at the bottom end of the second connecting block 4 is inserted into the corresponding slot 12 to achieve splicing, and it does not need to move left and right. For some narrow spaces or specific environments, the up and down splicing is more convenient, avoiding affecting the splicing efficiency of the composite beam.

[0023] As Figure 1 、 Figure 2 and Figure 3As shown, an installation groove 8 is formed at the top end of the second connection block 4, and a connection groove 9 is formed inside the second connection block 4. The installation groove 8 communicates with the connection groove 9, and a slot 10 is formed through the bottom end of the connection groove 9. Screw rods 6 are fixed to the top ends of both the first connection block 3 and the third connection block 5, and nuts 7 are screwed onto the outer walls of the screw rods 6. The nut 7 is located inside the connection groove 9, and the bottom end of the nut 7 contacts the bottom end of the connection groove 9.

[0024] It should be noted that by providing the screw rod 6, when the insertion block 11 at the bottom end of the second connection block 4 is inserted into the corresponding groove 12, the screw rod 6 just inserts into the slot 10 and is located in the connection groove 9. By screwing the nut 7 into the outer wall of the screw rod 6 from the installation groove 8, the nut 7 contacts the bottom end of the connection groove 9, realizing the fixation between the beam bodies, facilitating rapid on-site installation, saving time. If maintenance or modification is required, the nut 7 can be quickly disassembled from the outer wall of the screw rod 6, with high flexibility.

[0025] As Figure 1 and Figure 4 shown, a plurality of internal longitudinal bars 13 are fixed inside both the first beam body 1 and the second beam body 2, and stirrups 14 are fixed to the outer walls of the internal longitudinal bars 13. A plurality of external longitudinal bars 15 are fixed inside both the first beam body 1 and the second beam body 2, stiffening ribs 16 are fixed between the external longitudinal bars 15, a plurality of vertical bars are fixed to the top ends of the external longitudinal bars 15, and hooks 17 are fixed between adjacent vertical bars. The other end of the first beam body 1 is fixed with a mounting plate, and a plurality of mounting holes are formed in the mounting plate.

[0026] It should be noted that through the combined action of the internal longitudinal bars 13, stirrups 14, external longitudinal bars 15 and stiffening ribs 16, the composite beam shows better performance during loading and use. The internal longitudinal bars 13 and external longitudinal bars 15 can effectively improve the load-bearing capacity of the beam, and the stirrups 14 can enhance the shear resistance of the beam to prevent shear failure. Especially under large loads, it can effectively control the generation of cracks and improve the durability of the structure. The stiffening ribs 16 can enhance the overall stiffness and stability of the beam and reduce deformation. In addition, by providing the hooks 17, convenient lifting points are provided, facilitating handling and installation during construction, enabling the composite beam to be quickly lifted in place and reducing construction time. The first beam body 1 is fixed at the designated position through the mounting plate, and the mounting plate and the designated position are fixed by screwing bolts, etc.

[0027] Working principle: First, the first beam body 1 and the second beam body 2 can be driven downward by a crane, so that the insertion block 11 at one end of the second beam body 2 is inserted into the corresponding slot 12 to achieve splicing. It does not need to move left and right to achieve splicing. For some narrow spaces or specific environments, splicing up and down is more convenient, avoiding affecting the splicing efficiency of the laminated beam. In addition, after splicing, the screw 6 is located in the connection groove 9. By screwing the nut 7 from the installation groove 8 onto the outer wall of the screw 6, the nut 7 is brought into contact with the bottom end of the connection groove 9, realizing the fixation between beam bodies and facilitating rapid on-site installation.

[0028] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A precast concrete composite beam, comprising a first beam body (1) and a second beam body (2), characterized in that: One end of the first beam body (1) is fixed with a first connecting block (3), one end of the second beam body (2) is fixed with a second connecting block (4), the other end of the second beam body (2) is fixed with a third connecting block (5), corresponding slots (12) are opened at the tops of the first connecting block (3) and the third connecting block (5), a plug block (11) is fixed at the bottom end of the second connecting block (4), and the plug block (11) is inserted into the corresponding slot (12).

2. A precast concrete composite beam according to claim 1, characterized in that: An installation slot (8) is opened at the top end of the second connecting block (4), a connecting slot (9) is opened in the second connecting block (4), the installation slot (8) communicates with the connecting slot (9), a slot (10) is opened through the bottom end of the connecting slot (9), screw rods (6) are fixed at the tops of the first connecting block (3) and the third connecting block (5), and nuts (7) are screwed on the outer walls of the screw rods (6).

3. A precast concrete composite beam according to claim 2, characterized in that: The nut (7) is located in the connecting slot (9), and the bottom end of the nut (7) contacts the bottom end of the connecting slot (9).

4. A precast concrete composite beam according to claim 1, characterized in that: A plurality of internal longitudinal bars (13) are fixed in both the first beam body (1) and the second beam body (2), and stirrups (14) are fixed on the outer walls of the internal longitudinal bars (13).

5. A precast concrete composite beam according to claim 1, characterized in that: A plurality of external longitudinal bars (15) are fixed in both the first beam body (1) and the second beam body (2), reinforcing bars (16) are fixed between the external longitudinal bars (15), a plurality of vertical bars are fixed at the top ends of the external longitudinal bars (15), and hooks (17) are fixed between adjacent vertical bars.

6. A precast concrete composite beam according to claim 1, characterized in that: The other end of the first beam body (1) is fixed with a mounting plate, and a plurality of mounting holes are opened in the mounting plate.

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