Large-span prestressed double-T plate

Abstract

The utility model relates to the technical field of constructional engineering, in particular to a large-span prestress double-T plate. The large-span prestress double-T plate comprises a face plate, supporting assemblies and assembling grooves, ribbed beams are symmetrically and fixedly connected to the bottom end of the face plate, transverse ribs are fixedly connected to the middle of the bottom end of the face plate, connecting plates are fixedly connected to the two ends of the bottom end of the face plate, and the supporting assemblies are installed on the close sides of the two connecting plates. Two assembling grooves are formed in the top end of the panel, assembling blocks are slidably connected into the assembling grooves, lifting rings are fixedly connected to the top ends of the assembling blocks, the supporting assembly comprises a reinforcing rod, one side of the top end of the reinforcing rod is fixedly connected with a first connecting rod, and the other side of the top end of the reinforcing rod is fixedly connected with a second connecting rod. The load transmission path is optimized, stress concentration is avoided, the safety and stability of the structure under complex loads are enhanced, and the problem that local damage is caused due to the fact that a conventional double-T plate is prone to stress concentration under large concentrated loads is solved.

Description

Technical Field

[0001] This utility model relates to the field of building engineering technology, and in particular to a large-span prestressed double-T slab. Background Technology

[0002] Building construction involves the construction of various types of buildings and their ancillary facilities. The reason why double-T slabs are needed is firstly because they adopt prestressed technology, which has superior structural performance, enabling large spans, reducing the number of internal columns, and creating open spaces; secondly, the wide panels and ribbed structure give them strong load-bearing capacity, meeting the heavy load requirements of industrial plants, warehouses, and other places; thirdly, double-T slabs are mostly prefabricated in factories, making on-site installation convenient and effectively shortening the construction period; and finally, they have good durability, with prestressed concrete having strong resistance to corrosion, which can reduce maintenance costs and extend the service life of buildings.

[0003] Double-T slabs consist of a panel, ribs, and transverse ribs. Their working principle is as follows: the panel, a transverse load-bearing structure, directly bears the slab load and, together with the ribs, resists bending moments; the ribs, as the main load-bearing components, transfer the load from the panel to the supports; the transverse ribs strengthen the connection between the panel and the ribs, improving the overall structure's integrity and stability. All three work collaboratively. Simultaneously, by arranging and tensioning prestressed steel bars in the double-T slab, prestress is generated in the concrete. When subjected to external loads, this prestress can offset some of the tensile stress, thereby improving the component's crack resistance and load-bearing capacity, enabling large-span load-bearing. However, when there are large concentrated loads on the building structure, such as stage machinery in a stadium, conventional double-T slabs will experience stress concentration at the point of concentrated force application, leading to localized structural damage and potential safety accidents.

[0004] Therefore, it is necessary to provide a new type of large-span prestressed double-T slab to solve the above-mentioned technical problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a large-span prestressed double-T slab.

[0006] This utility model provides a large-span prestressed double-T slab, comprising: a panel, a support assembly, and an assembly groove. The bottom end of the panel is symmetrically and fixedly connected with rib beams, and the middle of the bottom end of the panel is fixedly connected with a transverse rib. Both ends of the bottom end of the panel are fixedly connected with connecting plates. Support assemblies are installed on the adjacent sides of the two connecting plates. The top end of the panel has two sets of assembly grooves, one set consisting of two. Assembly blocks are slidably connected inside the assembly grooves, and lifting rings are fixedly connected to the top of the assembly blocks.

[0007] Preferably, the support assembly includes a reinforcing rod, with a first connecting rod fixedly connected to one end of the reinforcing rod and a second connecting rod fixedly connected to the other end of the reinforcing rod.

[0008] Preferably, the outer side of the transverse rib is fixedly connected to the adjacent side of the two rib beams.

[0009] Preferably, the adjacent ends of the two ribs are fixedly connected to the outside of the two connecting plates.

[0010] Preferably, the assembly groove is a T-shaped groove, the assembly block is a T-shaped block, and the outer diameter of the assembly block is smaller than the inner diameter of the assembly groove.

[0011] Preferably, the top ends of the two first connecting rods are fixedly connected to the bottom end of the panel, and the far sides of the two second connecting rods are fixedly connected to the near sides of the two connecting plates.

[0012] Preferably, the adjacent sides of the two reinforcing rods are fixedly connected to the left and right sides of the transverse rib.

[0013] Compared with related technologies, the large-span prestressed double-T slab provided by this utility model has the following beneficial effects:

[0014] This invention optimizes the load transfer path by cooperating with the reinforcing rod, the first connecting rod, and the second connecting rod in the support assembly near the connecting plate, thereby avoiding stress concentration and enhancing the safety and stability of the structure under complex loads. It solves the problem that conventional double-T plates are prone to stress concentration and local damage under large concentrated loads.

[0015] This invention utilizes the frictional force of the T-shaped fit between the assembly slot and the assembly block to easily fix the lifting ring, facilitating crane lifting and accurate positioning. After lifting and contact, the lifting ring can be removed. When the building needs to be modified or maintained later, the ring-free surface makes it easier for construction workers to operate. Attached Figure Description

[0016] Figure 1 A structural schematic diagram of a large-span prestressed double-T slab provided for this utility model;

[0017] Figure 2 for Figure 1 The diagram shows the structure of the panel.

[0018] Figure 3 for Figure 1 Enlarged view of point A in the image.

[0019] The following are the labels in the diagram: 1. Panel; 2. Rib; 3. Horizontal rib; 4. Connecting plate; 5. Reinforcing rod; 6. First connecting rod; 7. Second connecting rod; 8. Assembly slot; 9. Assembly block; 10. Lifting ring. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0021] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0022] Please see Figures 1 to 3 A large-span prestressed double-T slab includes: a panel 1, with rib beams 2 symmetrically fixedly connected to the bottom end of the panel 1. The rib beams 2 effectively improve the bending and shear resistance of the rib beams 2. Multiple high-strength prestressed steel strands are arranged inside the rib beams 2. Through advanced prestressing tensioning technology, the rib beams 2 have strong load-bearing capacity before bearing load. A transverse rib 3 is fixedly connected to the middle of the bottom end of the panel 1. The transverse rib 3 has a rectangular cross section and its function is to enhance the connection strength between the panel 1 and the rib beams 2. The outer side of the transverse rib 3 is fixedly connected to the adjacent side of the two rib beams 2. This connection method adopts the process of pre-embedded steel bars and pouring concrete to ensure that the transverse rib 3 and the rib beams 2 form a solid whole, effectively improving the structural integrity of the double-T slab. Connecting plates 4 are fixedly connected to both ends of the bottom end of the panel 1. The adjacent ends of the two rib beams 2 are fixedly connected to the outer side of the two connecting plates 4, further enhancing the connection strength at the ends of the double-T slab.

[0023] Support components are installed on the adjacent sides of the two connecting plates 4. The support components include reinforcing rods 5, which are filled with concrete to improve their compressive and bending resistance. The adjacent sides of the two reinforcing rods 5 are fixedly connected to the left and right sides of the transverse ribs 3. A first connecting rod 6 is fixedly connected to one top side of the reinforcing rod 5. The first connecting rod 6 is an I-shaped steel beam with high strength and rigidity. The tops of the two first connecting rods 6 are fixedly connected to the bottom of the panel 1. A second connecting rod 7 is fixedly connected to the other top side of the reinforcing rod 5. The second connecting rod 7 is a rectangular steel beam. The distant sides of the two second connecting rods 7 are fixedly connected to the adjacent sides of the two connecting plates 4.

[0024] The top of the panel 1 has two sets of assembly slots 8, one set consisting of two slots. The assembly slots 8 are symmetrically distributed along the length of the panel 1. Assembly blocks 9 are slidably connected inside the assembly slots 8. The assembly slots 8 are T-shaped slots. This design can effectively limit the horizontal movement of the assembly blocks 9 and ensure the stability of the connection. The assembly blocks 9 are T-shaped blocks. The outer diameter of the assembly blocks 9 is smaller than the inner diameter of the assembly slots 8. The assembly blocks 9 are made of alloy material and have good wear resistance and corrosion resistance. The top of the assembly blocks 9 is fixedly connected to a lifting ring 10. The lifting ring 10 is firmly connected to the assembly blocks 9 by welding. It can withstand the huge tensile force of the double T-plate during the lifting process and ensure the safety and reliability of the lifting operation.

[0025] The working principle of the large-span prestressed double-T slab provided by this utility model is as follows:

[0026] The prefabricated and prestressed double-T slabs are transported from the prefabrication site to the construction site using transportation equipment. According to the installation requirements, the assembly block 9 and the lifting ring 10 are installed in the assembly groove 8 at the top of the panel 1. Since the assembly groove 8 is a T-shaped groove and the assembly block 9 is a T-shaped block with an outer diameter smaller than the inner diameter of the assembly groove 8, the assembly block 9 can be installed in place by sliding, thereby completing the fixation of the lifting ring 10 and preparing for subsequent hoisting operations. This is because the weight of the double-T slab causes the assembly block 9 to be fixed inside the assembly groove 8 by friction. Using a crane, the double-T slab is lifted by the slings connected to the lifting ring 10 and accurately transported to the designed installation position. It is then slowly lowered and connected to the lower support structure.

[0027] After the double T-slabs are installed and connected, they enter the normal load-bearing stage. Panel 1, as the transverse load-bearing structure that directly bears the slab load, will first bear various vertical loads. Panel 1 and rib beam 2 jointly resist the bending moment generated by the slab load. As the main load-bearing component, rib beam 2 transfers the load from panel 1 to the support through its own structural system. In this process, rib beam 2 relies on its large section moment of inertia and high load-bearing capacity under prestress to ensure the reliability of load transfer. The transverse rib 3 plays a role in strengthening the connection between panel 1 and rib beam 2, improving the integrity and stability of the structure. It can effectively reduce the local deformation of panel 1 under stress and prevent the structure from becoming locally unstable.

[0028] Meanwhile, in the support components located near the connecting plate 4, the reinforcing rod 5 can directly bear and distribute the load, and also enhance the overall structure. The first connecting rod 6 transfers the load of the reinforcing rod 5 to the panel 1, strengthening the connection stiffness between the two. The second connecting rod 7 constructs a force transmission path between the reinforcing rod 5 and the connecting plate 4, enhancing out-of-plane stability. The three work together to make the load transfer more orderly, avoid stress concentration, and ensure the safety and reliability of the double T plate under complex loads.

[0029] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A long-span prestressed double T slab, characterized by, include: Panel (1), rib beam (2) is symmetrically fixedly connected to the bottom end of panel (1), transverse rib (3) is fixedly connected to the middle of the bottom end of panel (1), and connecting plate (4) is fixedly connected to both ends of the bottom end of panel (1). Support components are installed on adjacent sides of both connecting plates (4); Assembly slot (8), the top of panel (1) is provided with two sets of assembly slots (8), one set consists of two, the inside of the assembly slot (8) is slidably connected to an assembly block (9), and the top of the assembly block (9) is fixedly connected to a lifting ring (10).

2. The long-span prestressed double-T slab according to claim 1, characterized in that, The support assembly includes a reinforcing rod (5), a first connecting rod (6) is fixedly connected to one side of the top end of the reinforcing rod (5), and a second connecting rod (7) is fixedly connected to the other side of the top end of the reinforcing rod (5).

3. The long-span prestressed double-T slab according to claim 1, characterized in that, The outer side of the transverse rib (3) is fixedly connected to the adjacent side of the two rib beams (2).

4. A large-span prestressed double-T slab according to claim 1, characterized in that, The two ribs (2) are fixedly connected to the outside of the two connecting plates (4) on their adjacent sides.

5. A large-span prestressed double-T slab according to claim 1, characterized in that, The assembly groove (8) is a T-shaped groove, and the assembly block (9) is a T-shaped block. The outer diameter of the assembly block (9) is smaller than the inner diameter of the assembly groove (8).

6. A large-span prestressed double-T slab according to claim 2, characterized in that, The top ends of the two first connecting rods (6) are fixedly connected to the bottom end of the panel (1), and the far side of the two second connecting rods (7) is fixedly connected to the near side of the two connecting plates (4).

7. A large-span prestressed double-T slab according to claim 2, characterized in that, The two reinforcing rods (5) are fixedly connected to the left and right sides of the transverse rib (3) on their adjacent sides.

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