Prestressed concrete steel pipe truss composite slab

Abstract

The utility model relates to truss laminated slab technical field, a prestressed concrete steel pipe truss laminated slab, including concrete bottom plate still include: set up in the truss steel pipe of concrete bottom plate, the inside of concrete bottom plate is provided with the spliced reinforcing bar of end head extension to side portion, protection assembly, protection assembly sets up in concrete bottom plate side portion and can protect spliced reinforcing bar, the utility model discloses a spliced reinforcing bar surface on laminated slab side portion sets up the movable plate and connecting shell that can extend to its neck portion, can protect the easy bending position of spliced reinforcing bar, reduce laminated slab in the process of hoisting and cause the bending of spliced reinforcing bar end portion because of the force of mistaken touch, lead to the problem that the design assumed lap joint length is seriously insufficient, the node stress performance is weakened significantly, simultaneously utilize the movable plate of single extension cooperation straightening hole, still can straighten the spliced reinforcing bar that the bending of accidental pressure causes and align the rate of spliced reinforcing bar of concrete bottom plate side edge.

Description

Technical Field

[0001] This utility model relates to the field of truss composite plate technology, specifically a prestressed concrete steel pipe truss composite plate. Background Technology

[0002] Prestressed concrete-steel tube truss composite slabs combine the advantages of prestressing, steel tube trusses, and composite systems. They typically consist of a factory-prefabricated concrete base slab, internally reinforced prestressed steel bars, and welded steel tube concrete trusses. After on-site installation, post-cast layers are poured to form a monolithic load-bearing slab. During construction, the truss acts as a stiffening rib; during service, it serves as a shear-resistant connector to ensure the combined action of the prefabricated and post-cast layers.

[0003] However, during the actual transportation and installation of this component, the large number of spliced ​​steel bars pre-installed on the side of the plate for structural connection are easily bent and deformed due to collisions and squeezing because of the lack of effective protection. Therefore, in actual construction or use, the bent spliced ​​steel bars not only weaken the force transmission performance of the joint, making the joint a weak link in the structure, but also greatly reduce construction efficiency because on-site correction is difficult, time-consuming and labor-intensive, and may damage the material of the spliced ​​steel bars. Utility Model Content

[0004] The purpose of this utility model is to provide a prestressed concrete steel pipe truss composite slab to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a prestressed concrete steel pipe truss composite slab, comprising a concrete base slab, and further comprising: truss steel pipes disposed within the concrete base slab, wherein spliced ​​reinforcing bars extending from the ends to the sides are disposed inside the concrete base slab. A protective component, which is disposed on the side of the concrete base slab and can protect the spliced ​​steel bars; The protective component includes a movable rod disposed on the side of the concrete base plate, and the surface of the movable rod is provided with a straightening hole, into which the spliced ​​steel bar is inserted.

[0006] Preferably, the protective assembly further includes a connecting shell disposed on the side of the concrete base plate. The side cross-section of the connecting shell is a horizontal U-shaped design. An adjustment screw is inserted into the inside of the connecting shell, and its end is fixedly connected to the side of the concrete base plate through a bearing seat. A threaded sleeve is threadedly connected to the surface of the adjustment screw, and the threaded sleeve is fixed in the movable rod.

[0007] Preferably, the surface of the connecting shell is movably connected to a hook via a rotating shaft, and the surface of the movable rod is provided with a hooking hole, the end of which is inserted into the hooking hole.

[0008] Preferably, the straightening hole is a horizontal conical design, and the number of straightening holes is consistent with that of the spliced ​​reinforcing bars.

[0009] Preferably, the protective component further includes a perforation formed on the side of the concrete base plate, a limit rod inserted into the perforation, and the other end of the limit rod being fixedly connected to a movable rod.

[0010] Preferably, in the initial state, the connecting shell and the movable rod are integrally connected and have an extended design on the surface of the spliced ​​steel bars.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention protects the easily bent parts of the spliced ​​steel bars by providing a movable plate and connecting shell that can extend to the neck of the spliced ​​steel bars on the side of the composite slab. This reduces the problem of bending of the spliced ​​steel bars due to accidental impact and stress during the hoisting of the composite slab, which leads to a serious deficiency in the designed lap length and significantly weakens the stress performance of the joint. At the same time, by using the movable plate that can be extended independently in conjunction with the straightening hole, the spliced ​​steel bars that have been bent due to accidental pressure can also be straightened, thus improving the alignment rate of the spliced ​​steel bars on the side of the concrete base slab. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of another structural form of the present invention; Figure 3 This is a schematic diagram of the structure of the movable rod of this utility model with a separate extension; Figure 4 This is a schematic diagram of the perforation and limiting rod of this utility model; Figure 5 For the present utility model Figure 3 Enlarged structural diagram at point A; Figure 6 This is a schematic diagram of the straightening hole of this utility model.

[0013] In the diagram: 100, concrete base slab; 110, truss steel pipe; 120, spliced ​​reinforcing bar; 200, protective component; 210, connecting shell; 211, movable rod; 212, adjusting screw; 213, perforation; 214, limit rod; 215, hook; 216, hooking hole; 217, straightening hole. Detailed Implementation

[0014] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0015] Please see Figure 1-6 As shown, a prestressed concrete steel pipe truss composite slab includes a concrete base slab 100 and a truss steel pipe 110 disposed within the concrete base slab 100. The concrete base slab 100 is provided with spliced ​​steel bars 120 whose ends extend to the sides. The protective component 200 is disposed on the side of the concrete base slab 100 and can protect the spliced ​​steel bars 120. The protective component 200 includes a movable rod 211 disposed on the side of the concrete base plate 100. The surface of the movable rod 211 is provided with a straightening hole 217, and the spliced ​​steel bar 120 is inserted into the straightening hole. The protective assembly 200 also includes a connecting shell 210 disposed on the side of the concrete base plate 100. The side cross section of the connecting shell 210 is a horizontal U-shaped design. An adjustment screw 212 is inserted into the connecting shell 210, and its end is fixedly connected to the side of the concrete base plate 100 through a bearing seat. A threaded sleeve is threadedly connected to the surface of the adjustment screw 212, and the threaded sleeve is fixed in the movable rod 211. When it is necessary to protect the spliced ​​steel bars 120 of the composite slab, the spliced ​​steel bars 120 are prone to bending due to accidental collisions during the hoisting or transportation of the composite slab. Therefore, in this embodiment, a movable rod 211 and a connecting shell 210 are provided on the surface of the spliced ​​steel bars 120. During transportation or hoisting, personnel can first adjust the screw 212 to make the threaded sleeve drive the movable rod 211 and the connecting shell 210 to move away from the concrete base slab 100 until the movable rod 211 and the connecting shell 210 move to the neck bending node of the spliced ​​steel bars 120. At this time, the neck of the spliced ​​steel bars 120 can be wrapped by the movable rod 211 and the connecting shell 210, which can provide overall and rigid group protection for all the protruding spliced ​​steel bars 120 during the transportation and hoisting stage, fundamentally preventing bending. One end of the aforementioned adjustment screw 212 extends to the outside of the connecting housing 210 and is fixed with a hexagonal head, which facilitates manual rotation; Using the above structure, even if an accidental collision occurs, the pressure can be evenly distributed by the movable rod 211 and the connecting shell 210 that simultaneously wrap and protect multiple spliced ​​steel bars 120, thus avoiding localized stress on a single spliced ​​steel bar 120. In the initial state, the connecting shell 210 is integrally connected with the movable rod 211 and has an extended design on the surface of the splicing steel bar 120; A hook 215 is movably connected to the surface of the connecting shell 210 via a rotating shaft. A hook hole 216 is provided on the surface of the movable rod 211, and the end of the hook 215 is inserted into the hook hole 216. When adjusting the position of the movable rod 211 and the connecting shell 210 by adjusting the screw 212, the hook 215 needs to be rotated first and its end inserted into the hook hole 216, so that the movable rod 211 and the connecting shell 210 can be integrated into one piece. The straightening hole 217 is a horizontal conical design, and the number of straightening holes 217 is the same as that of splicing steel bars 120; the protective component 200 also includes a through hole 213 opened on the side of the concrete base plate 100, a limit rod 214 is inserted into the through hole 213, and the other end of the limit rod 214 is fixedly connected to the movable rod 211. If a single spliced ​​rebar 120 is accidentally bent during the construction of the composite slab, resulting in a change in the lap length, the hook 215 should first be reversed so that its end is removed from the hook hole 216, thus disengaging the movable rod 211 and the connecting shell 210. At this time, the personnel can rotate the adjusting screw 212 separately. The adjusting screw 212 can drive the movable rod 211 to move towards the neck of the spliced ​​rebar 120 through the threaded sleeve on its surface. During the displacement, the straightening hole 217 passes through the bent part of the spliced ​​rebar 120 and can straighten the bent part of the spliced ​​rebar 120 by squeezing, thereby achieving the effect of straightening the spliced ​​rebar 120 as a whole and reducing the difference in lap length. It should be noted that the straightening hole 217 is a horizontal conical design, that is, the diameter of the hole is smaller on the side closer to the concrete base plate 100 and larger on the side farther from the concrete base plate 100. The diameter of the hole is dynamically matched with the diameter of the splicing steel bar 120. This design allows the conical inner wall to generate a continuous and gradual squeezing and straightening force on the bent splicing steel bar 120 when the movable rod 211 moves towards the end of the splicing steel bar 120, thereby achieving smooth straightening and avoiding excessive stress damage to the splicing steel bar 120. Working principle: During the hoisting or transportation of the composite slab, first rotate the hook 215 and insert its end into the hook hole 216, which will make the movable rod 211 and the connecting shell 210 a single unit. Then, by adjusting the screw 212, the threaded sleeve will drive the movable rod 211 and the connecting shell 210 to move away from the concrete base slab 100 until the movable rod 211 and the connecting shell 210 move to the neck of the spliced ​​steel bar 120. At this point, the movable rod 211 and the connecting shell 210 can be used to wrap around the neck of the spliced ​​steel bar 120, improving the stability of the spliced ​​steel bar 120. For neck support, if a single spliced ​​rebar 120 is accidentally bent during the construction of the composite slab, first reverse the hook 215 to disengage the movable rod 211 and the connecting shell 210, and then rotate the adjustment screw 212. At this time, the movable rod 211 can move independently towards the neck of the spliced ​​rebar 120. During the displacement, the straightening hole 217 passes through the bent part of the spliced ​​rebar 120 and can straighten the bent part of the spliced ​​rebar 120 by squeezing, thereby achieving the effect of straightening the spliced ​​rebar 120 as a whole and reducing the difference in lap length.

[0016] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A prestressed concrete steel pipe truss composite slab, comprising a concrete base slab (100), characterized in that, Also includes: Truss steel pipes (110) are installed in a concrete base slab (100), and spliced ​​steel bars (120) with their ends extending to the sides are provided inside the concrete base slab (100). A protective component (200) is disposed on the side of the concrete base plate (100) and is capable of protecting the spliced ​​steel bars (120); The protective component (200) includes a movable rod (211) disposed on the side of the concrete base plate (100), and the surface of the movable rod (211) is provided with a straightening hole (217), and the spliced ​​steel bar (120) is inserted into the straightening hole.

2. The prestressed concrete steel pipe truss composite slab according to claim 1, characterized in that: The protective assembly (200) also includes a connecting shell (210) disposed on the side of the concrete base plate (100). The side cross section of the connecting shell (210) is a horizontal U-shaped design. An adjustment screw (212) is inserted inside the connecting shell (210), the end of which is fixedly connected to the side of the concrete base plate (100) through a bearing seat. The surface of the adjustment screw (212) is threaded with a threaded sleeve, which is fixed in the movable rod (211).

3. The prestressed concrete steel pipe truss composite slab according to claim 2, characterized in that: The surface of the connecting shell (210) is movably connected to a hook (215) via a pivot, and the surface of the movable rod (211) is provided with a hook hole (216), the end of the hook (215) being inserted into the hook hole (216).

4. A prestressed concrete steel pipe truss composite slab according to claim 1, characterized in that: The straightening hole (217) is a horizontal conical design, and the number of the straightening holes (217) is consistent with that of the spliced ​​steel bars (120).

5. A prestressed concrete steel pipe truss composite slab according to claim 1, characterized in that: The protective component (200) also includes a perforation (213) opened on the side of the concrete base plate (100), a limiting rod (214) is inserted into the perforation (213), and the other end of the limiting rod (214) is fixedly connected to the movable rod (211).

6. A prestressed concrete steel pipe truss composite slab according to claim 1, characterized in that: In the initial state, the connecting shell (210) and the movable rod (211) are integrally connected and have an extended design on the surface of the splicing steel bar (120).

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