Prestressed concrete laminated slab of steel bar truss

Abstract

The utility model relates to the technical field of building equipment, and discloses a prestressed concrete laminated slab of a steel bar truss, which comprises a steel bar truss composed of steel bars, a prefabricated bottom plate and a grouting steel pipe, the steel bar at one end of the steel bar truss extends out of the prefabricated bottom plate and is provided with an adjusting component, and the grouting steel pipe is provided with a grouting hole. The grouting steel pipe is sleeved with the adjusting assembly. The height of the grouting steel pipe is adjustable, the rigidity of the laminated slab can be adjusted according to actual requirements, different application scenes and structure requirements often have different requirements for the rigidity of the laminated slab, the height-adjustable grouting steel pipe enables the laminated slab to better adapt to various conditions, and optimal adjustment of the rigidity is achieved; the overall rigidity and stress distribution of the laminated slab can be adjusted by adjusting the height of the grouting steel pipe, so that the laminated slab can reach a better stress state when bearing loads, the stress concentration and deformation risks are reduced, and the stability and safety of the whole structure are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of building equipment, in particular to a prestressed concrete composite plate of a steel bar truss. Background Art

[0002] Prestressed concrete composite slab with steel trusses is an efficient and economical building structural material. It is widely used in prefabricated formwork fields such as basement post-cast strips, foundations, retaining walls, cast-in-place floor roofs, walls, etc. that require concrete cast-in-place. This composite slab is mainly composed of steel trusses and concrete. The steel trusses are welded by longitudinal steel bars to provide rigidity and stability for the composite slab.

[0003] The patent with announcement number CN220747389U discloses a prestressed concrete composite slab with steel trusses, including a composite slab with a prestressed steel wire mesh inside, a plurality of steel bars extending out of the composite slab are vertically connected to the same horizontal planes on the upper and lower surfaces of the prestressed steel wire mesh, and a plurality of steel pipes are horizontally arranged on the upper and lower surfaces of the composite slab, all of which are covered with a plurality of sleeves, and all of which are fixedly connected to two adjacent steel bars through a "human" shaped truss, and a filling layer is supplemented between the steel pipes on the upper and lower surfaces and the composite slab; although the above device solves the problem of improving the strength and earthquake resistance of the overall structure.

[0004] However, the above technical solution still has the following problems:

[0005] The height of the grouting steel pipes in the composite slab cannot be adjusted, and the overall stiffness of the composite slab cannot be adjusted according to actual needs. In different application scenarios, the stiffness requirements of the composite slab may be different. The grouting steel pipes that cannot adjust the height will make the composite slab unable to meet the changing stiffness requirements. In the actual construction process, due to differences in factors such as floor height and structural form, it is often necessary to fine-tune the stiffness of the composite slab to adapt to specific conditions. If the height of the grouting steel pipes cannot be adjusted, the adaptability of the composite slab during the construction process will be greatly reduced, increasing the construction difficulty and adjustment workload. Utility Model Content

[0006] In view of the deficiencies in the prior art, the utility model provides a prestressed concrete composite slab of a steel truss to solve at least one of the problems raised by the background technology, such as: making the stiffness of the prestressed concrete composite slab of the steel truss adjustable, optimizing the stress performance, facilitating construction and saving costs.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a prestressed concrete composite slab of a steel truss, comprising a steel truss composed of a plurality of steel bars, a prefabricated bottom plate cast on the outside of the steel truss, and a grouting steel pipe installed on the top of the steel truss, wherein the steel bars at one end of the steel truss extend out of the prefabricated bottom plate and are installed with an adjustment component, one end of which is sleeved on the outside of the grouting steel pipe.

[0008] Furthermore, a steel bar head is provided at one end of the steel bar outside the prefabricated bottom plate, and two adjacent steel bar heads are inserted and connected with both ends of the adjustment component.

[0009] Furthermore, the adjustment component includes a connecting block, a prestressed steel plate and a fixing ring. Two symmetrically installed prestressed steel plates are fixedly connected to the outside of the fixing ring. A connecting block is fixedly connected to one end of the prestressed steel plate. The connecting block and the steel bar head are inserted and connected.

[0010] Furthermore, a slot is provided on the surface of the steel bar head, the bottom of the slot is connected to the outside, and the inner wall of the slot and the outer side of the connecting block are fixedly connected by external welding.

[0011] Furthermore, the inner wall of the fixing ring and the outer side of the grouting steel pipe are fitted and connected, and the inner wall of the fixing ring and the outer side of the grouting steel pipe are fixedly connected by external welding.

[0012] Furthermore, the grouting steel pipe and the fixing ring are detachably arranged.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The utility model makes the height of the grouting steel pipe adjustable, and the stiffness of the composite plate can be adjusted according to actual needs. Different application scenarios and structural requirements often have different demands on the stiffness of the composite plate. The grouting steel pipe with adjustable height enables the composite plate to better adapt to various situations and achieve optimal adjustment of the stiffness. By adjusting the height of the grouting steel pipe, the overall stiffness and stress distribution of the composite plate can be adjusted, so that the composite plate can achieve a better stress state when bearing loads, reduce stress concentration and deformation risks, and improve the stability and safety of the entire structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model;

[0017] Figure 3 It is a schematic diagram of the three-dimensional structure of the utility model.

[0018] In the figure: 1. Steel truss; 2. Prefabricated base plate; 3. Grouting steel pipe; 4. Adjustment assembly; 5. Steel bar; 6. Steel bar head; 601, slot; 7. Connection block; 8. Prestressed steel plate; 9. Fixing ring. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] like Figures 1 to 3 As shown, a prestressed concrete composite slab of a steel truss includes a steel truss 1 composed of a plurality of steel bars 5 connected together, a prefabricated bottom plate 2 cast on the outside of the steel truss 1, and a grouting steel pipe 3 installed on the top of the steel truss 1. The steel bars 5 at one end of the steel truss 1 extend out of the prefabricated bottom plate 2 and are installed with an adjustment component 4, one end of which is sleeved on the outside of the grouting steel pipe 3.

[0021] like Figure 1 As shown, a prestressed concrete composite slab of a steel truss in the utility model is similar to the existing prestressed concrete composite slab of a steel truss, such as the prestressed concrete composite slab of a steel truss disclosed in the patent announcement number CN220747389U. The main improvement of the utility model is to make the composite slab more flexible, efficient and safe in practical applications. Figures 1 to 3 As shown, when a prestressed concrete composite slab of a steel truss in the utility model is in use, the steel truss 1 composed of multiple steel bars 5 provides a strong structural support for the composite slab, ensuring the integrity and stability of the composite slab. The steel bars 5 at one end of the steel truss 1 extend out of the prefabricated bottom plate 2, which is convenient for connection and fixation during construction, and also provides convenience for subsequent adjustment work. The grouting steel pipe 3 is installed on the top of the steel truss 1 to improve the bearing capacity and durability of the composite slab. The adjustment component 4 allows the height and diameter of the grouting steel pipe 3 to be adjusted, thereby realizing the adjustment of the stiffness of the composite slab. The existence of the adjustment component 4 makes the composite slab have higher flexibility and adaptability during the construction process. By adjusting the height and diameter of the grouting steel pipe 3, the stiffness of the composite slab can be accurately controlled, so that it can better adapt to different floor heights, different structural forms and different force requirements, which can improve construction efficiency, reduce the workload of construction adjustment and correction, and optimize the force performance of the composite slab, reduce stress concentration and deformation risks, and improve the stability and safety of the entire structure.

[0022] like Figure 1 to Figure 2 As shown, a steel bar head 6 is provided at one end of the steel bar 5 outside the prefabricated bottom plate 2, and two adjacent steel bar heads 6 and two ends of the adjustment component 4 are inserted and connected.

[0023] Specifically, by setting up the steel bar head 6 at one end of the steel bar 5 outside the prefabricated base plate 2, the connection strength between the steel bar 5 and the adjustment component 4 is enhanced, and the entire structure is made more stable. The existence of the steel bar head 6 makes the connection between the steel bar 5 and the adjustment component 4 tighter and not easy to loosen, thereby ensuring the integrity and stability of the composite plate. The adjustment component 4 can be firmly fixed on the steel bar 5 and is not easy to be displaced or fall off. The stability and adjustability of the structure are achieved through insertion connection. The adjustment component 4 is sleeved on the outside of the grouting steel pipe 3, so that the height and diameter of the grouting steel pipe 3 can be accurately adjusted through the adjustment component 4. This adjustment function allows the composite plate to adjust its stiffness according to actual needs during construction to adapt to different construction environments and structural requirements.

[0024] like Figures 2 to 3 As shown, the adjustment component 4 includes a connecting block 7, a prestressed steel plate 8 and a fixing ring 9. Two symmetrically installed prestressed steel plates 8 are fixedly connected to the outer side of the fixing ring 9. One end of the prestressed steel plate 8 is fixedly connected to the connecting block 7. The connecting block 7 and the steel bar head 6 are inserted and connected.

[0025] Specifically, by setting the fixing ring 9 as the basic part of the adjustment component 4, two symmetrically installed prestressed steel plates 8 are fixedly connected to its outer side. The existence of the prestressed steel plate 8 enables the adjustment component 4 to withstand a large prestress, thereby ensuring that the composite plate can maintain a stable shape and performance when subjected to force. A connecting block 7 is fixedly connected to one end of the prestressed steel plate 8, so that the connecting block 7 can be firmly connected to the prestressed steel plate 8. The connecting block 7 and the steel bar head 6 are connected by insertion. This connection method is simple and easy, and has high connection strength, which can ensure a stable connection between the adjustment component 4 and the steel bar 5.

[0026] like Figure 3 As shown, a slot 601 is provided on the surface of the steel bar head 6, the bottom of the slot 601 is connected to the outside, and the inner wall of the slot 601 and the outer side of the connecting block 7 are fixedly connected by external welding.

[0027] Specifically, by setting the slot 601 on the surface of the steel bar head 6 to be long enough, the connecting block 7 of the adjacent adjusting component 4 can also be inserted therein, thereby further enhancing the stability and connection strength of the adjusting component 4 and providing more reliable support for the composite plate. By external welding, the connecting block 7 and the inner wall of the slot 601 are firmly fixedly connected. This connection method not only ensures the strength and stability of the connection, but also effectively prevents the connecting block 7 from loosening or falling off during use.

[0028] like Figures 1 to 3 As shown, the inner wall of the fixing ring 9 and the outer side of the grouting steel pipe 3 are fitted and connected, and the inner wall of the fixing ring 9 and the outer side of the grouting steel pipe 3 are fixedly connected by external welding.

[0029] Specifically, by setting the inner wall of the fixing ring 9 to fit tightly with the outer side of the grouting steel pipe 3 and realizing fixed connection through external welding, the stability of the grouting steel pipe 3 and the accuracy of the position are ensured, and the grouting steel pipe 3 is effectively supported and positioned. This tight fit ensures the verticality of the grouting steel pipe 3 in the composite plate. The welded connection has high strength and durability, and can withstand various complex stresses and deformations of the composite plate during the stress process, thereby ensuring the stability and safety of the entire structure.

[0030] like Figures 1 to 3 As shown, the grouting steel pipe 3 and the fixing ring 9 are detachably arranged.

[0031] Specifically, the detachable design of the grouting steel pipe 3 and the fixing ring 9 makes the two more flexible during installation and disassembly. Construction workers can easily insert the grouting steel pipe 3 into the fixing ring 9 or take it out from the fixing ring 9 according to actual construction needs, thereby greatly improving construction efficiency.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A prestressed concrete composite slab of a steel truss, comprising a steel truss (1) composed of a plurality of steel bars (5), a prefabricated bottom plate (2) cast outside the steel truss (1), and a grouting steel pipe (3) installed on the top of the steel truss (1), characterized in that: The steel bars (5) at one end of the steel bar truss (1) extend out of the prefabricated bottom plate (2) and are installed with an adjustment component (4), one end of which is sleeved on the outside of the grouting steel pipe (3).

2. The prestressed concrete composite slab of a steel truss according to claim 1, characterized in that: One end of the steel bar (5) outside the prefabricated bottom plate (2) is provided with a steel bar head (6), and two adjacent steel bar heads (6) and two ends of the adjustment component (4) are inserted and connected.

3. The prestressed concrete composite slab of a steel truss according to claim 2, characterized in that: The adjustment assembly (4) comprises a connection block (7), a prestressed steel plate (8) and a fixing ring (9); two symmetrically mounted prestressed steel plates (8) are fixedly connected to the outside of the fixing ring (9); one end of the prestressed steel plate (8) is fixedly connected to the connection block (7); and the connection block (7) and the steel bar head (6) are inserted and connected.

4. A prestressed concrete composite slab of a steel bar truss according to claim 2 or 3, characterized in that: A slot (601) is provided on the surface of the steel bar head (6), the bottom of the slot (601) is connected to the outside, and the inner wall of the slot (601) and the outer side of the connecting block (7) are fixedly connected by external welding.

5. The prestressed concrete composite slab of a steel truss according to claim 3, characterized in that: The inner wall of the fixing ring (9) and the outer side of the grouting steel pipe (3) are fitted and connected, and the inner wall of the fixing ring (9) and the outer side of the grouting steel pipe (3) are fixedly connected by external welding.

6. A prestressed concrete composite slab of a steel truss according to claim 3 or 5, characterized in that: The grouting steel pipe (3) and the fixing ring (9) are detachably arranged.

Images