Prefabricated composite floor slab with reserved pressing grooves and composite floor slab construction structure
By designing the prefabricated overlapping floor slabs and construction structure with reserved press grooves, the problem of traditional floor slab steel bar collision is solved, the connection strength and construction efficiency are improved, and the versatility of the mold is enhanced.
Patent Information
- Application Number
- CN202422025164.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-20
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-08-20
AI Technical Summary
When the existing traditional prefabricated overlapping floor slabs overlap with beams, the steel bars are prone to collision, resulting in inconvenience in construction, affecting efficiency, and not strong versatility of the mold.
A prefabricated overlapping floor slab with reserved press grooves is designed. The stressed steel bars are buried in the concrete prefabricated slabs, and the ends of the steel bars are flush with the end surface of the plate. The press grooves are set to enhance the bonding strength, and the existing steel bars are arranged during construction to improve the connection strength.
Eliminate the problem of steel bar collision, improve the strength at the joints of prefabricated concrete slabs, simplify mold design, improve construction efficiency and reduce material waste.
Smart Images
Figure CN223034294U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of building construction, and particularly belongs to a precast composite floor slab with a reserved pressing groove and a construction structure of the composite floor slab. Background Art
[0002] Currently, China is vigorously promoting prefabricated buildings. When the existing traditional precast composite floor slab is lapped with a beam, it is necessary to extend steel bars with a diameter of ≥5 times and at least to the midline of the beam. As a result, during on-site construction, it may cause the steel bars extended from the precast composite floor slab to collide with the stirrups extended from the precast composite beam. Even if the steel bar collision problem has been checked in the early design stage, it is inevitable that there will be omissions or the steel bars are not placed rigorously during production, resulting in the steel bar collision problem still existing on-site. This makes it very inconvenient for construction workers to hoist the precast composite floor slab, seriously affecting the construction efficiency. Moreover, after the detailed design, the external dimensions of the components are different, resulting in poor versatility of the molds. Content of the Utility Model
[0003] In view of this, the purpose of the present utility model is to overcome the deficiencies in the prior art and provide a precast composite floor slab with a reserved pressing groove. The present application provides the following technical solutions:
[0004] It includes a concrete precast slab, in which stress steel bars are embedded, and the ends of the stress steel bars are flush with the end face of the concrete precast slab; a pressing groove is arranged at the end of the concrete precast slab.
[0005] The ends of the stress steel bars are flush with the end face of the concrete precast slab, and the steel bars do not extend outside the concrete precast slab, so there will be no problem of steel bar collision; by setting the pressing groove, after the cast-in-place concrete layer is formed by concrete pouring, the bonding with the concrete precast slab is more stable.
[0006] The pressing groove includes a pressing groove bottom wall and pressing groove side walls, and both the upper part of the pressing groove and the side close to the end face of the concrete precast slab are open.
[0007] The upper end of the stress steel bar does not exceed the pressing groove bottom wall.
[0008] The pressing groove bottom wall is kept flat, and each surface of the concrete precast slab is flat, which is convenient for mold manufacturing. The stress steel bars are completely hidden in the concrete precast slab, and the shape of the mold is not affected by the arrangement of the stress steel bars, improving the versatility of the mold.
[0009] A groove is arranged on the side of the pressing groove side wall close to the pressing groove bottom wall.
[0010] By setting the groove, when concrete is poured, it flows into the groove. After the cast-in-place concrete layer formed by concrete pouring is solidified, the cast-in-place concrete layer and the concrete precast slab also have a wedge block fit, further improving the connection strength between the two.
[0011] An inclined groove communicating with the groove is further formed on the side wall of the grooved slot, which facilitates the flow of concrete into the groove.
[0012] In a second aspect, the present application further provides a construction structure for a composite floor slab, including a construction structure for connecting floor slabs and a construction structure for connecting the floor slab on the beam. Both the construction structure for connecting floor slabs and the construction structure for connecting the floor slab on the beam include a precast composite floor slab with a reserved grooved slot as described above, and a cast-in-place concrete layer is poured on the precast composite floor slab with the reserved grooved slot.
[0013] The construction structure for connecting floor slabs includes in-situ tied reinforcement between floor slabs and two concrete precast slabs. The end faces of the two concrete precast slabs are aligned and abutted. The in-situ tied reinforcement between floor slabs is arranged across the grooved slots at the adjacent ends of the two concrete precast slabs. The cast-in-place concrete layer is poured on the two concrete precast slabs and the grooved slots.
[0014] The construction structure for connecting the floor slab on the beam includes a support beam and the concrete precast slab. Embedded reinforcement of the support beam is provided on the upper part of the support beam. The concrete precast slab is placed on both sides of the embedded reinforcement of the support beam. In-situ tied reinforcement between the beam and the slab is arranged in the grooved slot on the concrete precast slab close to the embedded reinforcement of the support beam. The in-situ tied reinforcement between the beam and the slab is tied and fixed to the embedded reinforcement of the support beam. The cast-in-place concrete layer is poured on the concrete precast slab, the grooved slot and the support beam.
[0015] By arranging in-situ tied reinforcement between floor slabs and in-situ tied reinforcement between the beam and the slab, after the cast-in-place concrete layer is poured and solidified, the connection strength between the two concrete precast slabs is improved by the in-situ tied reinforcement between floor slabs, and the connection strength between the concrete precast slab and the support beam is improved by the in-situ tied reinforcement between the beam and the slab.
[0016] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present utility model are as follows:
[0017] All the stressed steel bars are arranged inside the concrete precast slab without leakage, so as to eliminate the problem of steel bar collision. At the same time, a grooved slot is designed on the concrete precast slab, and in-situ tied reinforcement is arranged on the grooved slot to enhance the strength of the connection part of the concrete precast slab. During actual construction, although in-situ tied reinforcement needs to be arranged, there is no need to design and adjust the position of the steel bars to avoid steel bar collision. The concrete precast slab can be manufactured using a unified mold, which is relatively more time-saving. At the same time, it avoids material waste caused by designing different molds, and the structure strength is not inferior to that of the existing precast composite floor slab by setting the grooved slot and in-situ tied reinforcement.
[0018] In order to make the above objects, features and advantages of the present application more obvious and understandable, the following specifically gives preferred embodiments and, in conjunction with the accompanying drawings, makes a detailed description as follows. Description of the Drawings
[0019] To more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.
[0020] Figure 1 It is a schematic diagram of the basic structure of a precast composite floor slab with a reserved pressing groove.
[0021] Figure 2 It is a schematic diagram of the optimized structure of a precast composite floor slab with a reserved pressing groove.
[0022] Figure 3 It is a schematic diagram of the connection construction structure between floor slabs in a composite floor slab construction structure.
[0023] Figure 4 It is a sectional view of the connection construction structure between floor slabs in a composite floor slab construction structure.
[0024] Figure 5 It is a schematic diagram of the connection construction structure between the floor slab and the beam in a composite floor slab construction structure.
[0025] Figure 6 It is a sectional view of the connection construction structure between the floor slab and the beam in a composite floor slab construction structure.
[0026] Reference numerals: 1, precast concrete slab; 11, pressing groove; 111, bottom wall of the pressing groove; 112, side wall of the pressing groove; 113, groove; 114, inclined groove; 2, stress reinforcement; 3, cast-in-place concrete layer; 4, in-situ tied steel bars between floor slabs; 5, supporting beam; 51, embedded steel bars of the supporting beam; 6, in-situ tied steel bars between the beam and the floor slab. Specific embodiments
[0027] The following will describe in detail the embodiments of the present application. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and should not be construed as a limitation to the present application.
[0028] In this application, unless otherwise clearly defined and limited, terms such as "installation", "connection", "attachment", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral one; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0029] In this application, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.
[0030] Please refer to Figure 1 As shown, a precast composite floor slab with a reserved groove provided by the present utility model includes a concrete precast slab 1, in which stress-bearing steel bars 2 are embedded, and the ends of the stress-bearing steel bars 2 are flush with the end face of the concrete precast slab 1; a groove 11 is provided at the end of the concrete precast slab 1.
[0031] The groove 11 includes a groove bottom wall 111 and groove side walls 112, and the upper part of the groove 11 and the side close to the end face of the concrete precast slab 1 are both open.
[0032] The upper end of the stress-bearing steel bar 2 does not extend beyond the groove bottom wall 111.
[0033] As Figure 2 shown, a groove 113 is provided on the side of the groove side wall 112 close to the groove bottom wall 111.
[0034] A plurality of inclined grooves 114 communicating with the groove 113 are evenly provided on the groove side wall 112.
[0035] Please refer to Figures 3 - 6 As shown, a composite floor slab construction structure provided by the present utility model includes a floor slab connection construction structure and a floor slab connection construction structure on a beam. Both the floor slab connection construction structure and the floor slab connection construction structure on a beam include the above-mentioned precast composite floor slab with a reserved groove, and a cast-in-place concrete layer 3 is poured on the precast composite floor slab with a reserved groove.
[0036] As Figures 3 - 4As shown in the figure, the construction structure for connecting floor slabs includes the in-situ reinforcement bars 4 between floor slabs and two precast concrete slabs 1. The end faces of the two precast concrete slabs 1 are aligned and abutted. The in-situ reinforcement bars 4 between floor slabs are arranged across the pressing grooves 11 at the adjacent ends of the two precast concrete slabs 1, and both ends of the in-situ reinforcement bars 4 between floor slabs extend into the grooves 113. The in-situ concrete layer 3 is poured on both of the two precast concrete slabs 1 and the pressing grooves 11.
[0037] As Figures 5 - 6 shown in the figure, the construction structure for connecting the floor slab on the beam includes the supporting beam 5 and the precast concrete slab 1. The supporting beam embedded reinforcement bars 51 are arranged on the upper part of the supporting beam 5. The precast concrete slab 1 is placed on both sides of the supporting beam embedded reinforcement bars 51. The in-situ reinforcement bars 6 between the beam and the slab are arranged in the pressing grooves 11 near the supporting beam embedded reinforcement bars 51 on the precast concrete slab 1. One end of the in-situ reinforcement bars 6 between the beam and the slab is tied and fixed to the supporting beam embedded reinforcement bars 51, and the other end extends into the groove 113 of this precast concrete slab 1. The in-situ concrete layer 3 is poured on the precast concrete slab 1, the pressing grooves 11 and the supporting beam 5.
[0038] It should be noted that the construction structure for connecting the floor slab on the beam can also be applied to the erection of the precast concrete slab 1 on the load-bearing wall.
[0039] During specific implementation, the mold is made according to the shape of the precast concrete slab 1. The stress reinforcement bars are placed in the mold, and the precast concrete slab 1 is fabricated by pouring. Then, on-site construction is carried out. The precast concrete slab 1 is erected on the already constructed supporting beam 5 and the load-bearing wall according to the requirements of the "Technical Standard for Assembled Concrete Buildings". The in-situ reinforcement bars 6 between the beam and the slab are inserted and arranged in the pressing grooves 11 of the precast concrete slab 1. Then, the adjacent end faces of the adjacent precast concrete slabs 1 are fitted together. The in-situ reinforcement bars 4 between the floor slabs are arranged in the pressing grooves 11 at the adjacent ends of the two precast concrete slabs 1. After the installation of the entire layer of precast concrete slabs 1 is completed, the in-situ concrete layer 3 is poured on the precast concrete slabs 1, the pressing grooves 11 and the supporting beam 5.
[0040] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.
Claims
1. A prefabricated composite floor slab with a reserved groove, comprising a prefabricated concrete slab (1), wherein a stress-bearing steel bar (2) is embedded in the prefabricated concrete slab (1), characterized in that: The end of the stressed steel bar (2) is flush with the end face of the precast concrete slab (1); a groove (11) is provided at the end of the precast concrete slab (1); the groove (11) comprises a groove bottom wall (111) and a groove side wall (112); the upper part of the groove (11) and the side close to the end face of the precast concrete slab (1) are both open; a groove (113) is provided on the side of the groove side wall (112) close to the groove bottom wall (111); and an inclined groove (114) communicating with the groove (113) is also provided on the groove side wall (112).
2. A prefabricated composite floor slab with reserved grooves as claimed in claim 1, characterized in that: The upper end of the stressed steel bar (2) does not extend beyond the bottom wall (111) of the groove.
3. A composite floor construction structure, characterized in that: It comprises a connection construction structure between floor slabs and a connection construction structure for floor slabs on beams, wherein the connection construction structure between floor slabs and the connection construction structure for floor slabs on beams both comprise a prefabricated composite floor slab with a reserved groove as described in any one of claims 1-2, and a cast-in-place concrete layer (3) is cast on the prefabricated composite floor slab with a reserved groove.
4. A composite floor construction structure as claimed in claim 3, characterized in that: The inter-floor connection construction structure comprises inter-floor in-situ steel bars (4) and two precast concrete slabs (1), the end faces of the two precast concrete slabs (1) are aligned and abutted, the inter-floor in-situ steel bars (4) are arranged across the pressure grooves (11) at the adjacent ends of the two precast concrete slabs (1), and the cast-in-situ concrete layer (3) is cast on both the two precast concrete slabs (1) and the pressure grooves (11).
5. A composite floor construction structure as claimed in claim 4, characterized in that: The floor-slab connection construction structure comprises a support beam (5) and the precast concrete slab (1); the upper part of the support beam (5) is provided with embedded support beam steel bars (51); the precast concrete slab (1) is arranged on both sides of the embedded support beam steel bars (51); the precast concrete slab (1) is provided with in-situ steel bars (6) between beams and slabs in the grooves (11) near the embedded support beam steel bars (51) on the precast concrete slab (1); the in-situ steel bars (6) between beams and slabs are fixedly connected with the embedded support beam steel bars (51); the precast concrete slab (1), the grooves (11) and the support beam (5) are all cast with the cast-in-situ concrete layer (3).