Precast concrete composite beam

Abstract

The utility model discloses a kind of precast concrete composite beams, comprising: multiple bottom beams, and the top of bottom beam is equipped with first concrete slab;Connecting assembly, connecting assembly is located between two adjacent bottom beams, and connecting assembly includes: aluminum mould, slot and second concrete slab, the bottom of first concrete slab is equipped with multiple aluminum mould, the top of first concrete slab is equipped with two slots, and second concrete slab is poured in slot.In the utility model, two adjacent composite beams can be accurately installed and pre-fixed by the setting of connecting assembly, to ensure the pouring operation of subsequent second concrete slab, and by chiseling and brushing interface agent in slot, the quality of new and old concrete joint surface is ensured, and the connection is reliable.

Description

Technical Field

[0001] This utility model relates to the field of composite beam technology, specifically to precast concrete composite beams. Background Technology

[0002] Precast concrete composite beams, as an important type of prefabricated building component, are widely used in industrial and civil buildings, bridges and other projects due to their advantages such as fast construction speed, high product quality and low environmental impact.

[0003] In the current use of composite beams, the connection between adjacent composite beams usually relies on simple post-cast concrete strips, lacking effective temporary positioning and precise alignment devices. This makes it difficult to ensure that the end faces of the two beams fit tightly during on-site installation, which can easily lead to quality problems such as misalignment and gaps. As a result, the overall stiffness and load-bearing capacity between the two composite beams are affected, and the advantages of continuous beams cannot be fully utilized. Utility Model Content

[0004] The technical problem to be solved by this utility model embodiment is to provide a precast concrete composite beam. By setting the connecting components, two adjacent composite beams can be accurately installed and pre-fixed to ensure the subsequent pouring of the second concrete slab. At the same time, by roughening the groove and applying an interface agent, the quality of the bonding surface between the new and old concrete is ensured, and the connection is reliable.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a precast concrete composite beam, comprising: Multiple bottom beams, with a first concrete slab on top of each bottom beam; A connecting component is provided between two adjacent bottom beams. The connecting component includes: an aluminum mold, a slot, and a second concrete slab. The bottom of the first concrete slab is provided with multiple aluminum molds, and the top of the first concrete slab has two slots, in which the second concrete slab is poured.

[0006] Furthermore, a plurality of studs are welded to the top of the bottom beam, and the plurality of studs are distributed in a rectangular array, the studs being located inside the first concrete slab.

[0007] Furthermore, the two slots are symmetrically arranged, and two adjacent slots are combined to form a casting groove, and the inner wall of the slot is roughened.

[0008] Furthermore, the size of the pouring trough is adapted to the size of the second concrete slab.

[0009] Furthermore, the groove is connected to a reinforcing bar, which is arranged in an L-shape and the multiple reinforcing bars are evenly distributed.

[0010] Furthermore, both sides of the aluminum mold are connected to side plates, and multiple connection holes are provided on the side plates. Both sides of the bottom beam are provided with multiple through holes corresponding to the connection holes.

[0011] Furthermore, a fixing hole is provided on the top of the aluminum mold, and a fixing bolt is provided in the fixing hole. Multiple fastening holes are provided on one side of the aluminum mold, and fastening bolts are provided in the fastening holes.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: By setting up the connecting components, two adjacent composite beams can be precisely installed and pre-fixed, ensuring the subsequent pouring of the second concrete slab. At the same time, by roughening the groove and applying an interface agent, the quality of the interface between the old and new concrete is ensured, and the connection is reliable. Furthermore, the L-shaped steel bars embedded in the groove serve as connecting keys, extending into the second concrete slab after pouring, forming a shear-resistant connection, further ensuring the reliability of the connection node. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This is another schematic diagram of the overall structure of this utility model.

[0015] Figure 3 This is a schematic diagram of the slotted structure of this utility model.

[0016] Figure 4 This is a schematic diagram of the bottom beam structure of this utility model.

[0017] Figure 5 This is a schematic diagram of the aluminum mold structure of this utility model.

[0018] Figure 6 For the present utility model Figure 2 Enlarged view of point A in the image.

[0019] In the diagram: 1. Bottom beam; 101. Stud; 102. Through hole; 2. First concrete slab; 201. Groove; 202. Reinforcing bar; 3. Aluminum formwork; 301. Side plate; 302. Connecting hole; 303. Fixing hole; 304. Fastening hole; 4. Second concrete slab. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] This application provides a precast concrete composite beam, which solves the problems of misalignment during connection of existing composite beams and unstable connection between new and old concrete.

[0022] By setting up the connecting components, two adjacent composite beams can be precisely installed and pre-fixed, ensuring the subsequent pouring of the second concrete slab 4. At the same time, by roughening and applying an interface agent in the groove 201, the quality of the interface between the new and old concrete is ensured, and the connection is reliable. Furthermore, the L-shaped steel bar 202 embedded in the groove 201 serves as a connecting key, extending into the second concrete slab 4 after pouring, forming a shear-resistant connection, which further ensures the reliability of the connection node and makes the overall structural performance equivalent to that of cast-in-place concrete.

[0023] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0024] Reference Figure 1 , Figure 2 and Figure 3 As shown, a precast concrete composite beam includes: multiple bottom beams 1, with a first concrete slab 2 on the top of the bottom beams 1; and a connecting assembly, which is located between two adjacent bottom beams 1. The connecting assembly includes: aluminum molds 3, slots 201, and a second concrete slab 4. Multiple aluminum molds 3 are provided at the bottom of the first concrete slab 2, and two slots 201 are opened at the top of the first concrete slab 2, with the second concrete slab 4 poured into the slots 201.

[0025] Combination Figure 5 As shown, furthermore, a plurality of studs 101 are welded to the top of the bottom beam 1, and the plurality of studs 101 are distributed in a rectangular array, and the studs 101 are located inside the first concrete slab 2.

[0026] During the prefabrication of the bottom beam 1, multiple studs 101 can be welded to the top of the bottom beam 1. Then, the casting template for the first concrete slab 2 is installed on the top of the bottom beam 1, and the first concrete slab 2 is poured, so that the first concrete slab 2 and the bottom beam 1 are connected to each other to form a composite beam. At this time, due to the setting of the studs 101, when the composite beam is bent, a huge longitudinal shear force will be generated on the contact surface between the bottom beam 1 and the first concrete slab 2, resulting in a horizontal slippage tendency. At this time, multiple studs 101 are embedded in the concrete to resist this shear force and prevent relative sliding between the bottom beam 1 and the first concrete slab 2.

[0027] Reference Figure 5 and Figure 6 As shown, the aluminum mold 3 has side plates 301 connected to both sides, and multiple connecting holes 302 are provided on the side plates 301. Multiple through holes 102 corresponding to the connecting holes 302 are provided on both sides of the bottom beam 1. A fixing hole 303 is provided on the top of the aluminum mold 3, and a fixing bolt is provided in the fixing hole 303. Multiple threaded holes are provided on the bottom of the first concrete slab 2. Multiple fastening holes 304 are provided on one side of the aluminum mold 3, and fastening bolts are provided in the fastening holes 304.

[0028] After the first concrete slab 2 is poured, the formwork is removed, and the prefabrication of the concrete composite beam is completed. The composite beam is then transported to the site for assembly. When it is necessary to connect two adjacent composite beams, the two composite beams can be brought close together, and the aluminum formwork 3 is connected to the through hole on the bottom beam 1 through the connecting hole 302 and connecting bolts, so that the aluminum formwork 3 is installed on the bottom beam 1. Then, the aluminum formwork 3 is connected to the first concrete slab 2 through the fixing hole 303 and fixing bolts, completing the installation of the aluminum formwork 3. Next, the aluminum formwork 3 on the two composite beams is connected to each other through the fastening hole 304 and fastening bolts, so that the two composite beams are close to each other and pre-fixed. At this time, the slots 201 on the two first concrete slabs 2 are close together to form a pouring groove, and the second concrete slab 4 can be poured. After the strength of the second concrete slab 4 reaches the standard, the aluminum formwork 3 can be removed and reused.

[0029] Combination Figure 3 As shown, furthermore, two adjacent slots 201 are combined to form a casting trough, the inner wall of the slot 201 is roughened, and the size of the casting trough is adapted to the size of the second concrete slab 4.

[0030] By roughening the inner wall of the slot 201, the surface roughness is increased, so that when the second concrete slab 4 is poured later, the first concrete slab 2 and the second concrete slab 4 can form a mechanical interlock. Before pouring the second concrete slab 4, a concrete interface agent is applied to the inner wall of the groove 201 to enhance the chemical bond between the new and old concrete, seal the capillaries, and prevent the moisture in the new concrete from being absorbed too quickly by the old concrete. Through a combination of mechanical and chemical methods, the bond strength between the newly poured concrete and the hardened concrete is enhanced, ensuring that the two can work together to form a whole and effectively transfer shear force, bending moment and tensile force.

[0031] Combination Figure 3 As shown, the slot 201 is connected to a steel bar 202. The steel bar 202 is arranged in an L-shape and multiple steel bars 202 are evenly distributed. Through the arrangement of the steel bar 202, it can serve as a stress node inside the second concrete slab 4, effectively constraining the concrete and improving its shear strength.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A precast concrete composite beam, characterized in that, include: Multiple bottom beams (1), with a first concrete slab (2) on top of the bottom beams (1); The connecting component is located between two adjacent bottom beams (1). The connecting component includes: aluminum mold (3), slot (201) and second concrete slab (4). The bottom of the first concrete slab (2) is provided with multiple aluminum molds (3). The top of the first concrete slab (2) has two slots (201). The second concrete slab (4) is poured in the slots (201).

2. The precast concrete composite beam according to claim 1, characterized in that, The bottom beam (1) is welded with a plurality of studs (101) on its top, and the plurality of studs (101) are distributed in a rectangular array, and the studs (101) are located inside the first concrete slab (2).

3. The precast concrete composite beam according to claim 1, characterized in that, The two slots (201) are arranged symmetrically, and two adjacent slots (201) are combined to form a casting groove, and the inner wall of the slots (201) is roughened.

4. The precast concrete composite beam according to claim 3, characterized in that, The size of the pouring trough is adapted to the size of the second concrete slab (4).

5. The precast concrete composite beam according to claim 1, characterized in that, The slot (201) is connected to a reinforcing bar (202), which is arranged in an L-shape and the multiple reinforcing bars (202) are evenly distributed.

6. The precast concrete composite beam according to claim 1, characterized in that, The aluminum mold (3) is connected to side plates (301) on both sides. Multiple connecting holes (302) are provided on the side plates (301). Multiple through holes (102) corresponding to the connecting holes (302) are provided on both sides of the bottom beam (1).

7. The precast concrete composite beam according to claim 1, characterized in that, The aluminum mold (3) has a fixing hole (303) on the top, and a fixing bolt is provided in the fixing hole (303). The aluminum mold (3) has multiple fastening holes (304) on one side, and fastening bolts are provided in the fastening holes (304).

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