Prestressed concrete member

Abstract

The utility model discloses a prestressed concrete member, and particularly relates to the technical field of concrete members, the prestressed concrete member comprises a hollow slab body, mounting steel plates and connecting fixing rods, the inner cavity of the hollow slab body is provided with a hollow groove, the mounting steel plates are mounted on the outer surfaces of two groups of limiting bumps, and the connecting fixing rods are arranged on the opposite surfaces of the two groups of mounting steel plates. Connecting flanges are welded at the edges of the upper and lower ends of the two groups of mounting steel plates; when the member bears a load, the two groups of mounting steel plates are mutually fixed through the connecting and fixing rods, force is transmitted to the steel plates on the opposite sides through the welding joints, and when external lateral tension is generated, the tensile strength of the steel plates and the connecting and binding of the fixing rods directly resist the overall frame, so that the concrete member is prevented from cracking and separating due to the lateral tension; the component body is protected, the mounting steel plate and the hollow plate are embedded in a concave-convex mode, the component body and the hollow plate are directly embedded into a whole during concrete pouring prefabrication forming, the burden of a concrete component is reduced, and crack expansion is restrained.

Description

Technical Field

[0001] This utility model relates to the field of concrete component technology, and more specifically, to a prestressed concrete component. Background Technology

[0002] Concrete components have been widely used in structural engineering. Currently, the existing concrete components generally use two types: non-prestressed and prestressed. Prestressed concrete components can reduce the cross-sectional area and the amount of steel used. Among them, prestressed concrete hollow slabs are one of the commonly used prestressed concrete components.

[0003] A search revealed that patent publication number CN222362677U discloses a prestressed concrete component, including a hollow concrete slab. The surface of the hollow concrete slab has equally spaced hollow grooves, and reinforcing bars are embedded at the bottom of each slab. A reinforcing mechanism is provided inside the hollow concrete slab, comprising reinforcing components and a fiberglass mesh. Lifting mechanisms are provided at both ends of the surface of the hollow concrete slab, each consisting of a receiving groove and lifting components. Positioning mechanisms are provided on both sides of the surface of the hollow concrete slab, each containing positioning components, positioning grooves, and positioning posts. This not only improves the efficiency of aligning and placing prestressed concrete components and increases their strength during use, but also enhances the convenience of lifting them. The inventors discovered the following problems with the existing technology during the development of this utility model:

[0004] Existing prestressed concrete members rely on the tensile strength of the concrete itself to bear tensile forces. When they encounter external loads and lateral tensile forces caused by shrinkage stress from temperature deformation, the concrete itself has relatively low strength, which can easily cause cracking and lead to structural failure due to member separation. When adjacent members are assembled, they need to rely on concrete and fasteners to transfer loads. Lateral tensile forces will directly act on the concrete interface, thus causing the members to be affected by cracking and separation.

[0005] Therefore, a prestressed concrete component is proposed to address the above problems. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a prestressed concrete component to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a prestressed concrete component, comprising a hollow slab body, mounting steel plates and connecting fixing rods, wherein a hollow groove is provided in the inner cavity of the hollow slab body, and limiting protrusions are provided on both sides of the hollow slab body, and the mounting steel plates are installed on the outer surfaces of the two sets of limiting protrusions, and grooves are provided on the inner sides of the opposite surfaces of the two sets of mounting steel plates.

[0008] A reinforcing column is welded to the center of each of the two sets of grooves. The connecting fixing rod is set on the opposite side of the two sets of mounting steel plates, and connecting flanges are welded to the upper and lower edges of the two sets of mounting steel plates.

[0009] Preferably, the reinforcing column is provided in several groups, and the two groups of mounting steel plates are respectively fitted into the outer surfaces of the two groups of limiting protrusions through the two groups of grooves.

[0010] Preferably, the reinforcing columns are distributed at equal intervals, and when the two sets of mounting steel plates are respectively fitted into the two sets of limiting protrusions, the reinforcing columns are simultaneously inserted into the inner cavity of the limiting protrusions to achieve fixation.

[0011] Preferably, there are six sets of connecting fixing rods, and the two ends of the six sets of connecting fixing rods are respectively welded to the upper and lower ends of the opposite surfaces of the two sets of mounting steel plates.

[0012] Preferably, guide posts are provided on both sides of the front end of the hollow groove, and limit grooves are provided on both sides of the rear end face of the hollow groove. The two sets of limit grooves and the two sets of guide posts are symmetrically arranged.

[0013] Preferably, one set of mounting steel plates has lateral mounting columns welded to both ends on the right side, and the other set of mounting steel plates has lateral limiting grooves opened at both ends on the left side. The two sets of lateral mounting columns and the two sets of lateral limiting grooves are symmetrically arranged.

[0014] Preferably, the hollow grooves are provided in four groups, the four groups of hollow grooves are distributed at equal intervals, and the inner diameter of the four groups of hollow grooves is equal.

[0015] Preferably, the surface of the connecting flange is provided with fixing holes, and the fixing holes are provided in several groups, with the groups of fixing holes being distributed at equal intervals.

[0016] The technical effects and advantages of this utility model are as follows:

[0017] 1. Compared with the existing technology, this prestressed concrete component has two sets of installation steel plates that are fixed to each other by connecting rods when the component is under load. The force is transferred to the opposite steel plate through welding joints. When external lateral tension is generated, the tensile strength of the steel plates and the connection binding of the fixing rods directly resist the overall frame, avoiding cracking and separation of the concrete component due to lateral tension and protecting the component body.

[0018] 2. Compared with existing technologies, this prestressed concrete component uses a steel plate that is interlocked with the hollow slab and is directly embedded as a whole during the precast concrete pouring process. When installing adjacent components, they only need to be quickly locked by the metal flanges and bolts on the edge of the steel plate. The steel plate directly bears the tensile and compressive stress, reducing the burden on the concrete component and preventing several adjacent assembled concrete components from cracking due to excessive unidirectional stress, thus inhibiting crack propagation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of the steel plate mounting plate of this utility model.

[0021] Figure 3 This is a three-dimensional structural diagram of the hollow plate body of this utility model.

[0022] Figure 4 This is a rear-view three-dimensional structural diagram of the hollow plate body of this utility model.

[0023] The attached figures are labeled as follows: 1. Hollow plate body; 2. Hollow groove; 3. Limiting protrusion; 4. Mounting steel plate; 5. Connecting fixing rod; 6. Groove; 7. Reinforcing column; 8. Connecting flange; 9. Fixing hole; 10. Guide column; 11. Limiting groove; 12. Lateral mounting column; 13. Lateral limiting groove. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.

[0025] Example 1

[0026] As attached Figures 1 to 4The prestressed concrete component shown includes a hollow slab body 1, mounting steel plates 4, and connecting fixing rods 5. The hollow slab body 1 has a hollow groove 2 in its inner cavity. The hollow slab body 1 is cast from pre-tensioned steel bars to form a concrete component. The hollow groove 2 reduces the self-weight of the component and optimizes the cross-sectional stress performance. Limiting protrusions 3 are provided on both sides of the hollow slab body 1. The mounting steel plates 4 are installed on the outer surface of the two sets of limiting protrusions 3. The mounting steel plates 4 are bonded to the hollow slab body 1 by pouring concrete to achieve the protection, tensile and compressive strength of the hollow slab body 1. The inner sides of the opposite surfaces of the two sets of mounting steel plates 4 are provided with grooves 6. The limiting protrusions 3 and the grooves 6 of the mounting steel plates 4 form a mortise and tenon structure to increase the contact area with the hollow slab body 1.

[0027] A reinforcing column 7 is welded to the center of each of the two sets of grooves 6. The reinforcing column 7 enhances the adhesion to the concrete and prevents the steel plate from being pulled out of the concrete. The connecting fixing rod 5 is set on the opposite side of the two sets of installation steel plates 4. The two sets of installation steel plates 4 and the connecting fixing rod 5 are welded together to form an integral frame. When the installation steel plates 4 on both sides are under tension, the connecting fixing rod 5 and the installation steel plates 4 form an integral force to bear the tension, preventing the hollow slab body 1 of the concrete pouring from cracking first. In addition, the upper and lower edges of the two sets of installation steel plates 4 are welded with connecting flanges 8. The connecting flanges 8 welded to the edges of the installation steel plates 4 are quickly connected to the flanges of adjacent plates by high-strength bolts during on-site installation.

[0028] Example 2

[0029] Based on Example 1, the solution in Example 1 will be further described in detail below with reference to the specific working method, such as... Figures 1 to 4 As shown below, see details:

[0030] In a preferred embodiment, several sets of reinforcing columns 7 are provided. Two sets of mounting steel plates 4 are respectively fitted into the outer surfaces of two sets of limiting protrusions 3 through two sets of grooves 6. The two sets of mounting steel plates 4 are tightly installed on both sides of the hollow plate body 1. Several sets of reinforcing columns 7 are distributed at equal intervals. When the two sets of mounting steel plates 4 are respectively fitted into the two sets of limiting protrusions 3, the reinforcing columns 7 are simultaneously inserted into the inner cavity of the limiting protrusions 3 to achieve fixation. The reinforcing columns 7 are inserted into the inner cavity of the limiting protrusions 3 to form a mechanically fixed node, and resist the interface pull-out force through the action of the cross-section pin.

[0031] In a preferred embodiment, six sets of connecting and fixing rods 5 are provided. The two ends of the six sets of connecting and fixing rods 5 are respectively welded to the upper and lower ends of the opposite surfaces of the two sets of mounting steel plates 4. The six sets of connecting and fixing rods 5 form a symmetrically distributed rigid support chain at the upper and lower ends of the mounting steel plates 4, which firmly binds the mounting steel plates 4 on both sides. When the hollow plate body 1 is subjected to external tension, the tension is directly transmitted through the connecting and fixing rods 5, avoiding separation between the mounting steel plates 4 and the hollow plate body 1 due to uneven force.

[0032] In a preferred embodiment, guide posts 10 are provided on both sides of the front end of the hollow groove 2, and limiting grooves 11 are provided on both sides of the rear end face of the hollow groove 2. The two sets of limiting grooves 11 and the two sets of guide posts 10 are symmetrically arranged. The symmetrical layout of the guide posts 10 and the limiting grooves 11 allows adjacent components to be limited and installed along the inner cavity of the limiting grooves 11 by the guide posts 10 during splicing. One set of mounting steel plates 4 has lateral mounting posts 12 welded to both ends on the right side, and the other set of mounting steel plates 4 has lateral limiting grooves 13 opened at both ends on the left side. The two sets of lateral mounting posts 12 and the two sets of lateral limiting grooves 13 are symmetrically arranged. The lateral mounting posts 12 are installed in the lateral limiting grooves 13 and work in conjunction with the guide posts 10 to limit the adjacent components around them.

[0033] In a preferred embodiment, four sets of hollow grooves 2 are provided, and the four sets of hollow grooves 2 are distributed at equal intervals. The inner diameter of the four sets of hollow grooves 2 is the same. The four sets of hollow grooves 2 distributed at equal intervals can evenly distribute the load, reduce the weight of the component, and achieve lightweighting. Fixing holes 9 are provided on the surface of the connecting flange 8. Several sets of fixing holes 9 are provided, and the several sets of fixing holes 9 are distributed at equal intervals. The equally spaced fixing holes 9 can evenly distribute tensile and shear loads to each bolt, and make it convenient to install the assembled components.

[0034] The working process of this utility model is as follows: First, prestressed steel bars are tensioned on the platform of the prefabrication plant, the forming mold of the hollow groove 2 is positioned and installed, and concrete is poured to form the hollow slab body 1. At this time, the hollow groove 2 achieves lightweight by reducing the amount of concrete used, while optimizing the cross-sectional resistance. The limiting protrusion 3 is cast together with the hollow slab body 1. The limiting protrusion 3 on the protruding surface forms a mortise and tenon joint with the groove 6 of the subsequent installation steel plate 4, providing a basis for mechanical embedding. The installation steel plate 4 will be embedded in the outer surface of the limiting protrusion 3, so that the groove 6 and the limiting protrusion 3 are tightly engaged. The reinforcing column 7 is placed in the inner cavity of the limiting protrusion 3 during casting and is fixed to the installation steel plate 4 by welding, directly resisting the pulling force of the installation steel plate 4 being pulled out.

[0035] Six sets of connecting and fixing rods 5 are welded to the upper and lower edges of the mounting steel plate 4 to connect the mounting steel plate 4 and the hollow slab body 1 into an integral frame. The six sets of connecting and fixing rods 5 are evenly spaced and uniformly distributed. When pouring the hollow groove 2 at the front end of the hollow slab body 1, a guide column 10 is set, and a limiting groove 11 is opened at the rear end to form a vertical splicing limit. At the same time, lateral mounting columns 12 are welded on the left and right sides of the mounting steel plate 4 respectively, and lateral limiting grooves 13 are opened for mechanical limiting during horizontal splicing. High-strength bolts are inserted through the fixing holes 9 of the connecting flange 8 to rigidly connect the flanges of adjacent steel plates. The above is the working principle of this kind of prestressed concrete component.

Claims

1. A prestressed concrete member comprising a hollow slab body (1), a mounting steel plate (4) and a connecting fixing rod (5), characterized in that: The hollow plate body (1) has a hollow groove (2) in its inner cavity. Limiting protrusions (3) are provided on both sides of the hollow plate body (1). The mounting steel plate (4) is installed on the outer surface of the two sets of limiting protrusions (3). Grooves (6) are provided on the inner side of the opposite surfaces of the two sets of mounting steel plates (4). A reinforcing column (7) is welded to the center of each of the two sets of grooves (6), the connecting fixing rod (5) is set on the opposite side of the two sets of mounting steel plates (4), and a connecting flange (8) is welded to the upper and lower edges of the two sets of mounting steel plates (4).

2. A prestressed concrete member according to claim 1, characterized in that: The reinforcing column (7) is provided in several groups, and the two groups of mounting steel plates (4) are respectively fitted into the outer surfaces of the two groups of limiting protrusions (3) through the two groups of grooves (6).

3. A prestressed concrete member according to claim 2, c h a r a c t e r i z e d in that: Several sets of reinforcing columns (7) are distributed at equal intervals. When two sets of mounting steel plates (4) are respectively fitted into two sets of limiting protrusions (3), the reinforcing columns (7) are simultaneously inserted into the inner cavity of the limiting protrusions (3) to achieve fixation.

4. A prestressed concrete member as defined in claim 1, wherein: The connecting fixing rod (5) is provided in six sets, and the two ends of the six sets of connecting fixing rods (5) are respectively welded to the upper and lower ends of the opposite surfaces of the two sets of mounting steel plates (4).

5. A prestressed concrete member as defined in claim 1, wherein: Guide posts (10) are provided on both sides of the front end of the hollow groove (2), and limit grooves (11) are provided on both sides of the rear end face of the hollow groove (2). The two sets of limit grooves (11) and the two sets of guide posts (10) are symmetrically arranged.

6. A prestressed concrete member as defined in claim 1, wherein: One set of mounting steel plates (4) has lateral mounting columns (12) welded to both ends on the right side, and the other set of mounting steel plates (4) has lateral limiting grooves (13) opened at both ends on the left side. The two sets of lateral mounting columns (12) and the two sets of lateral limiting grooves (13) are symmetrically arranged.

7. A prestressed concrete member as defined in claim 1, wherein: The hollow groove (2) is provided in four groups, and the four groups of hollow grooves (2) are distributed at equal intervals, and the inner diameter of the four groups of hollow grooves (2) is the same.

8. A prestressed concrete member as defined in claim 1, wherein: The surface of the connecting flange (8) is provided with fixing holes (9), and there are several groups of fixing holes (9), which are distributed at equal intervals.

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