A full-precast jointed floor and building thereof

Abstract

The application provides a full-precast jointed floor slab and a building thereof, the full-precast jointed floor slab is formed by splicing a plurality of precast floor slabs, and the precast floor slab is provided with a tooth groove at a splicing position; after two adjacent precast floor slabs are engaged with each other through the tooth groove, the two precast floor slabs are fixedly connected through a connecting and fixing assembly. The two precast floor slabs are spliced through the tooth groove structure, and the tooth groove structure significantly improves the in-plane shear bearing capacity and rigidity of the floor slab; the two adjacent precast floor slabs are connected through a plurality of connecting and fixing assemblies, so that the bending rigidity and bearing capacity of the full-precast jointed floor slab are significantly improved.

Description

Technical Field

[0001] This invention relates to the field of building technology, and in particular to a fully prefabricated jointed floor slab and its building. Background Technology

[0002] Floor slabs are one of the important horizontal components of a building structure. Their main functions include two aspects: first, under normal use conditions, they bear vertical loads such as the floor slab's own weight, decoration loads, and service loads, and transfer them to load-bearing components such as beams and columns; second, when the building is subjected to horizontal loads such as wind loads or seismic loads, they effectively transfer the horizontal loads of the floor to the lateral force resisting system of the building structure through their own in-plane stiffness and bearing capacity.

[0003] Existing floor slab types mainly include cast-in-place slabs, reinforced concrete slabs, and composite slabs. Cast-in-place slabs require extensive on-site formwork work and wet concrete pouring, which does not meet the requirements of rapid industrialized construction and green environmental protection concepts. Reinforced concrete slabs and composite slabs are both forms of prefabricated assembled floor slabs, but they have also encountered several problems in their application over the past few years. Reinforced concrete slabs have been relatively successful in public buildings, but their use in residential buildings is greatly limited due to the aesthetic impact of the galvanized steel base. While composite slabs offer better aesthetics and load-bearing performance, to ensure the integrity of the composite slab, the slab thickness generally needs to be greater than 150mm, making them unsuitable for residential buildings where slab thickness is typically 100-120mm. Both reinforced concrete slabs and composite slabs offer advantages in rapid industrialized construction to some extent, but the amount of on-site wet concrete work remains significant. Summary of the Invention

[0004] The purpose of this invention is to provide a fully prefabricated jointed floor slab and its building, so as to solve at least one of the above-mentioned technical problems existing in the prior art.

[0005] To solve the above-mentioned technical problems, the present invention provides a fully prefabricated spliced ​​floor slab, which is composed of several prefabricated floor slabs spliced ​​together, and the prefabricated floor slabs are provided with toothed grooves at the splicing points; After two adjacent precast floor slabs are engaged with each other through the toothed grooves, they are fixedly connected by a connecting and fixing component.

[0006] Furthermore, the tooth groove includes alternating teeth and grooves.

[0007] Furthermore, the tooth groove is either dovetail-shaped or rectangular.

[0008] Furthermore, U-shaped steel bars are embedded in the side walls of the teeth and slots, and each U-shaped steel bar connects to the three side walls of the teeth or slots, thereby increasing the load-bearing capacity of the teeth and slots.

[0009] Furthermore, an open groove is provided on the top surface of the precast floor slab; a connecting hole is provided inside the precast floor slab; the inner end of the connecting hole communicates with the open groove (the inner end of the connecting hole is opened on the side wall of the open groove), and the outer end of the connecting hole is provided on the splicing side of the precast floor slab. After two adjacent precast floor slabs are spliced ​​together, the two open grooves arranged opposite each other on the two precast floor slabs are connected through two connecting holes. The connecting and fixing components are arranged in the connecting hole and the opening groove.

[0010] Furthermore, the connecting and fixing assembly includes an intermediate connector and fixing members; the two ends of the intermediate connector pass through the connecting holes in two adjacent precast floor slabs and extend into the open recesses of the two precast floor slabs; the two fixing members are arranged in the open recesses and are fixedly connected to the two ends of the intermediate connector, and the length or outer diameter of the fixing member is larger than the diameter of the connecting hole, so as to prevent the intermediate connector from detaching from the precast slab, and at the same time can be used for the transmission of horizontal force between the two precast floor slabs.

[0011] Furthermore, the fixing member is a connecting plate, the outer diameter of which is larger than the diameter of the connecting hole; the connecting plate has a shaft hole in the middle, and after the end of the intermediate connecting member is inserted into the shaft hole of the connecting plate, the two are fixedly connected by locking members such as locking pins, buckles, nuts or anchor heads.

[0012] The intermediate connecting component can be a rigid connecting rod such as a screw or shaft, corresponding to a locking pin, buckle, or nut. The end of the rigid connecting rod is provided with a pin hole, an annular groove, or a threaded section. The intermediate connecting component can also be a flexible connecting component such as a steel strand or a hinge, with the end of the flexible connecting component using an anchor head to lock the connecting plate.

[0013] Preferably, the connecting plate is a circular or polygonal plate.

[0014] Furthermore, the fixing member is a pin, the length of which is greater than the diameter of the connecting hole, and the end of the intermediate connecting member is provided with an insertion hole. After the pin is inserted into the insertion hole, it is perpendicular to the intermediate connecting member.

[0015] Furthermore, after the connection and fixing components are installed, grout is injected into the open recess and the connection hole to fill the gaps in the connection hole and level the open recess.

[0016] Furthermore, the connecting hole is located at the center of the tooth or slot.

[0017] The density of the connecting and fixing components can be set according to design requirements and the width of the tooth groove. When the tooth groove is large, one or more sets of connecting and fixing components can be set within one tooth groove. When the tooth groove is small, a set of connecting and fixing components can be set after one or more tooth grooves.

[0018] The second aspect of this application discloses a building employing the aforementioned fully prefabricated spliced ​​floor slabs, wherein the prefabricated floor slabs overlap on beams.

[0019] By adopting the above technical solution, the present invention has the following beneficial effects: This invention provides a fully prefabricated jointed floor slab and its structure, consisting of two prefabricated floor slabs joined together by a toothed groove structure. This toothed groove structure significantly improves the in-plane shear capacity and stiffness of the floor slab. Adjacent prefabricated floor slabs are connected by multiple connecting and fixing components, further enhancing the bending stiffness and load-bearing capacity of the fully prefabricated jointed floor slab. Simultaneously, it coordinates the vertical deformation of the prefabricated assembled floor slabs on both sides of the joint, preventing inconsistent deflection between the two slabs that could lead to cracking in the decorative finish and affect the aesthetics. The toothed groove structure and connecting and fixing components greatly increase the in-plane shear and bending load-bearing capacity of the fully prefabricated floor slab and ensure coordinated out-of-plane deformation, achieving a near-cast-in-place monolithic floor slab effect. Furthermore, the structure is simple and on-site construction is relatively convenient. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a top view of the fully prefabricated jointed floor slab provided in Embodiment 1 of the present invention; Figure 2 for Figure 1 An exploded view of the fully prefabricated jointed floor slab shown. Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 for Figure 1 A partial sectional view of a prefabricated, jointed floor slab. Figure 5 This is a front view of the fastener in Example 1; Figure 6 This is a structural schematic diagram of another embodiment of the fully prefabricated jointed floor slab in Example 1; Figure 7 for Figure 6A partial sectional view of a prefabricated, jointed floor slab. Figure 8 This is a schematic diagram of the connection structure of the fully prefabricated jointed floor slab provided in Example 2; Figure 9 This is a structural schematic diagram of the fully prefabricated jointed floor slab provided in Example 3; Figure 10 This is a schematic diagram of the connection structure between adjacent precast floor slabs in Example 3.

[0022] Figure label: 100-Precast floor slab; 100a-First floor slab; 100b-Second floor slab; 101-Opening sink; 101a-First opening sink; 101b-Second opening sink; 102-Connecting hole; 102a-First connecting hole; 102b-Second connecting hole; 103-Grouting; 104-Collection hole; 105-Ventilation hole; 110-Groove; 111-Clamping tooth; 112-Clamping groove; 113-U-shaped steel bar; 120-Connecting and fixing component; 121-Intermediate connector; 121a-Shaft; 122-Fixing component; 123-Locking component; 130-Steel sleeve; 131-Annular limiting boss; 132-Piston plate; 133-Cap; 135-Reinforcing steel bar; 200-Beam. Detailed Implementation

[0023] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] The present invention will be further explained below with reference to specific embodiments.

[0027] Example 1 Reference Figure 1-4 As shown, this embodiment provides a fully prefabricated spliced ​​floor slab, which is spliced ​​together from several prefabricated floor slabs 100. The prefabricated floor slabs 100 are provided with grooves 110 at the splicing points. After two adjacent prefabricated floor slabs 100 are engaged with each other through the grooves 110, they are fixedly connected by a connecting and fixing component 120.

[0028] The tooth groove 110 includes alternating teeth 111 and slots 112. The tooth groove 110 is either dovetail-shaped or rectangular.

[0029] Furthermore, U-shaped steel bars 113 are embedded in the side walls of the locking teeth 111 and the locking grooves 112. Each U-shaped steel bar 113 connects to three side walls of the locking teeth 111 or the locking grooves 112, thereby increasing the load-bearing capacity of the teeth and grooves 110. The U-shaped steel bars 113 can be set in the side walls of all the locking teeth 111 and the locking grooves 112, or they can be set intermittently in the side walls of some of the locking teeth 111 and the locking grooves 112.

[0030] Furthermore, an open recessed groove 101 is provided on the top surface of the precast floor slab 100; a connecting hole 102 is provided inside the precast floor slab 100; the inner end of the connecting hole 102 communicates with the open recessed groove 101 (the inner end of the connecting hole 102 is opened on the side wall of the open recessed groove 101), and the outer end of the connecting hole 102 is provided on the splicing side of the precast floor slab 100; after two adjacent precast floor slabs 100 are spliced ​​together, the two open recessed grooves 101 arranged opposite each other on the two precast floor slabs 100 are connected through the two connecting holes 102 of each other; the connecting and fixing assembly 120 is arranged in the connecting hole 102 and the open recessed groove 101.

[0031] Optionally, see [link / reference]. Figure 4As shown, the connecting and fixing assembly 120 includes an intermediate connector 121 and a fixing member 122; the two ends of the intermediate connector 121 pass through the connecting holes 102 in two adjacent precast floor slabs 100 and extend into the open recesses 101 of the two precast floor slabs 100; two or two sets of fixing members 122 are arranged in the open recesses 101 and are fixedly connected to the two ends of the intermediate connector 121 respectively. The length or outer diameter of the fixing member 122 is larger than the diameter of the connecting hole 102, which is used to prevent the intermediate connector 121 from detaching from the precast slab, and can also be used to transmit horizontal forces between the two precast floor slabs 100.

[0032] Preferably, see Figure 5 As shown, the fixing member 122 is a connecting plate, the outer diameter of which is larger than the diameter of the connecting hole 102; a shaft hole is provided in the middle of the connecting plate, and after the end of the intermediate connecting member 121 is inserted into the shaft hole of the connecting plate, the two are fixedly connected by locking members 123 such as locking pins, buckles, nuts or anchor heads. Preferably, the connecting plate is a circular or polygonal plate.

[0033] The intermediate connecting member 121 can be a rigid connecting rod such as a screw or shaft, corresponding to a locking member 123 such as a locking pin, buckle or nut. The end of the rigid connecting rod is provided with a pin hole, an annular groove or a threaded section.

[0034] In addition, the intermediate connector 121 can also be a flexible connector such as a steel strand or a hinge, and the end of the flexible connector is locked with a locking member 123 such as an anchor head to lock the connecting plate.

[0035] Alternatively, the fixing member 122 can also be a pin, the length of which is greater than the diameter of the connecting hole 102. The end of the intermediate connecting member 121 is provided with a insertion hole, and the pin is inserted into the insertion hole and is perpendicular to the intermediate connecting member 121.

[0036] Furthermore, after the connection and fixing assembly 120 is installed, grout 103 is injected into the open recess 101 and the connection hole 102 to fill the gap in the connection hole 102 and level the open recess 101.

[0037] In this embodiment, the connecting hole 102 is located at the center of the locking tooth 111 or the locking groove 112. The density of the connecting and fixing components 120 can be set according to design requirements and the width of the tooth groove 110; when the tooth groove 110 is large, one or more sets of connecting and fixing components 120 can be set within one tooth groove 110; when the tooth groove 110 is small, a set of connecting and fixing components 120 can be set after one or more tooth grooves 110.

[0038] The second aspect of this application discloses a building employing the aforementioned fully prefabricated jointed floor slabs, see [link to relevant documentation]. Figure 6 As shown, the precast floor slab 100 overlaps the beam 200. The toothed groove 110 is preferably dovetail-shaped. The open countersunk groove 101 is a rectangular countersunk hole. See also... Figure 7 As shown, each end of the intermediate connector 121 includes several spaced fasteners 122, thereby improving the anchoring force.

[0039] This invention comprises two precast floor slabs 100 joined together by a toothed groove structure 110. The toothed groove structure 110 significantly enhances the in-plane shear capacity and stiffness of the floor slab. Adjacent precast floor slabs 100 are connected by multiple connecting and fixing components 120, further significantly improving the bending stiffness and load-bearing capacity of the fully precast spliced ​​floor slab. Simultaneously, it coordinates the vertical deformation of the fully precast assembled floor slabs on both sides of the splice, preventing inconsistent deflection between the two slabs that could lead to cracking in the decorative finish and affect the aesthetics. The toothed groove structure 110 and the connecting and fixing components 120 greatly increase the in-plane shear and bending load-bearing capacity of the fully precast floor slab 100 and ensure coordinated out-of-plane deformation, achieving a near-cast-in-place monolithic floor slab effect. Furthermore, the structure is simple and on-site construction is relatively convenient.

[0040] Example 2 This embodiment is basically the same as Embodiment 1, except that: Reference Figure 8 As shown, the prefabricated jointed floor slab provided in this embodiment has a storage hole 104. The storage hole 104 is coaxial with the connecting hole 102 and is arranged opposite to each other on both sides of the open recess 101. Before installation, the intermediate connector 121 is pre-installed in the storage hole 104. One end of the intermediate connector 121 is inserted into the storage hole 104, and the other end of the intermediate connector 121 extends into the open recess 101 and is fixedly connected to the fixing member 122 in the open recess 101. The fixing member 122 can prevent the intermediate connector 121 from falling off during transportation and handling.

[0041] Alternatively, one of two adjacent precast floor slabs 100 may be pre-installed with the intermediate connector 121 and the fastener 122; the other may not be pre-installed with the intermediate connector 121 and the fastener 122.

[0042] More preferably, two adjacent precast floor slabs 100 include (or are divided into) a male slab and a female slab. The male slab is provided with a receiving hole 104 and is pre-installed with an intermediate connector 121 and a fixing member 122; while the female slab is not provided with a receiving hole 104 and is therefore not pre-installed with an intermediate connector 121 and a fixing member 122.

[0043] During installation, after the two precast floor slabs 100 are assembled in place, the fixing member 122 is removed from the end of the intermediate connector 121. The intermediate connector 121 is then pulled out from the receiving hole 104 and inserted into the two connecting holes 102 of the two precast floor slabs 100. Both ends of the intermediate connector 121 protrude into the open recesses 101 of the two precast floor slabs 100. Two or more sets of fixing members 122 are fixedly connected to both ends of the intermediate connector 121. That is, the intermediate connector 121 in the male slab is inserted into the connecting hole 102 of the female slab and extends into the open recess 101, and then connected and fixed using the fixing member 122.

[0044] After installation, grout 103 is simultaneously injected into the receiving hole 104, the connecting hole 102, and the open settling tank 101. Preferably, a vent hole 105 is provided on the bottom upper side wall of the receiving hole 104, which connects the receiving hole 104 and the top surface of the precast floor slab 100, and is used to discharge internal gas when injecting grout 103.

[0045] In this embodiment, the structure is more compact, which greatly improves installation efficiency and reduces the labor intensity of workers.

[0046] Example 3 This embodiment is basically the same as Embodiment 1, except that: Reference Figure 9 As shown, in this embodiment, two adjacent precast floor slabs 100 include a first floor slab 100a and a second floor slab 100b.

[0047] A steel sleeve 130 is fixedly installed in the first connecting hole 102a of the first floor slab 100a; an annular limiting boss 131 is provided in the outer end of the steel sleeve 130 near the splicing surface; a piston plate 132 is slidably installed in the steel sleeve 130; the intermediate connecting member 121 is a shaft 121a, and the inner end of the shaft 121a is fixedly connected to the piston plate 132 perpendicularly (preferably by welding).

[0048] Before construction and installation, the shaft 121a and piston plate 132 are pre-installed inside the steel sleeve 130 for easy transportation and handling. (Refer to...) Figure 10 As shown, during installation, after the first floor slab 100a and the second floor slab 100b are assembled in place, grout is injected into the first opening recess 101a and the steel sleeve 130 of the first floor slab 100a. The pressure of the grout forces the piston plate 132 and the shaft 121a to slide along the steel sleeve 130 until the piston plate 132 abuts against the annular limiting boss 131. The outer end of the shaft 121a extends out of the steel sleeve 130, passes through the second connecting hole 102b of the second floor slab 100b, and extends into the second opening recess 101b. The fixing member 122 is fixedly connected to the outer end of the shaft 121a.

[0049] Compared with Examples 1 and 2, this example has higher construction efficiency and significantly reduced labor intensity.

[0050] A cover 133 may be optionally fixedly installed at the edge of the first opening sink 101a of the first floor slab 100a. The cover 133 is provided with a grouting port, which helps to improve the sealing during grouting and the grouting pressure in the first opening sink 101a, thereby smoothly forcing the piston plate 132 and the shaft 121a to slide.

[0051] More preferably, it also includes reinforcing steel bars 135, which are embedded in the precast floor slab 100 and arranged perpendicularly to the steel sleeve 130. One end of the reinforcing steel bars 135 is welded and fixed to the steel sleeve 130, thereby improving the connection strength of the steel sleeve 130.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fully prefabricated, jointed floor slab, characterized in that, It is composed of several precast floor slabs spliced ​​together, and the precast floor slabs are provided with toothed grooves at the splicing points; After two adjacent precast floor slabs are engaged with each other through the toothed grooves, they are fixedly connected by a connecting and fixing assembly; An open groove is provided on the top surface of the precast floor slab; a connecting hole is provided inside the precast floor slab; the inner end of the connecting hole communicates with the open groove, and the outer end of the connecting hole is provided on the splicing side of the precast floor slab. After two adjacent precast floor slabs are spliced ​​together, the two open grooves arranged opposite each other on the two precast floor slabs are connected through two connecting holes. The connecting and fixing components are arranged in the connecting hole and the opening groove; The connection and fixing assembly includes an intermediate connector and a fixing component; Two adjacent precast floor slabs include the first floor slab and the second floor slab; A steel sleeve is fixedly installed in the first connecting hole of the first floor slab; an annular limiting boss is provided in the outer end of the steel sleeve near the splicing surface; a piston plate is slidably installed in the steel sleeve, and the intermediate connecting member is a shaft, the inner end of which is perpendicularly fixedly connected to the piston plate; Before construction and installation, the shaft and piston plate are pre-installed in the steel sleeve. During installation, after the first and second floor slabs are assembled in place, grout is injected into the first opening groove of the first floor slab and the steel sleeve. The pressure of the grout forces the piston plate and shaft to slide along the steel sleeve until the piston plate abuts against the annular limiting boss. The outer end of the shaft extends out of the steel sleeve, passes through the second connecting hole of the second floor slab, and extends into the second opening groove. The fastener is fixedly connected to the outer end of the shaft.

2. The fully prefabricated jointed floor slab according to claim 1, characterized in that, The tooth groove includes alternating teeth and grooves.

3. The fully prefabricated jointed floor slab according to claim 1, characterized in that, The tooth groove is either dovetail-shaped or rectangular.

4. The fully prefabricated jointed floor slab according to claim 2, characterized in that, The sidewalls of the teeth and slots are embedded with U-shaped steel bars, and each U-shaped steel bar connects to the three sidewalls of the teeth or slots, thereby increasing the load-bearing capacity of the teeth and slots.

5. A building employing the fully prefabricated jointed floor slab as described in any one of claims 1-4, characterized in that, The precast floor slabs overlap the crossbeams.

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