Hybrid fiber concrete composite floor slab connected through slab side grooves and building structure

Abstract

The invention discloses a hybrid fiber concrete composite floor slab connected through plate side grooves and a building structure, and belongs to the field of buildings. The composite floor slab comprises a floor slab body; the floor slab body extends in the first direction and is provided with a first end and a second end which are opposite in the first direction, grooves are formed in the surface of the floor slab body and located in the first end of the floor slab body and / or the second end of the floor slab body, and first connecting ribs are arranged in the grooves and used for being connected with concrete beams.

Description

Technical Field

[0001] This application belongs to the field of construction, and particularly relates to a hybrid fiber concrete composite floor slab and a building structure with side groove connections of the slab. Background Art

[0002] With the development of building industrialization, composite slab components are widely used in prefabricated buildings due to their stable mechanical properties, convenient construction, energy conservation and environmental protection. The composite slab is an important horizontal load-bearing component in the prefabricated structure. Compared with the precast slab layer, the composite slab has good integrity and superior seismic performance; compared with the cast-in-place slab, it can save building materials, shorten the construction period, and is environmentally friendly.

[0003] In related technologies, the bottom slab of the commonly used composite slab is a precast slab layer with extended steel bars. When connecting the precast slab layer to the concrete beam, the extended steel bars of the precast slab layer are likely to collide with the steel bars of the concrete beam. The steel bars need to avoid and interlace with each other, which is difficult to handle and has low construction efficiency. Summary of the Invention

[0004] The purpose of the embodiments of this application is to provide a hybrid fiber concrete composite floor slab and a building structure with side groove connections of the slab, which can at least solve the problems that when connecting the precast slab layer to the concrete beam, the extended steel bars of the precast slab layer are likely to collide with the steel bars of the concrete beam, and the steel bars need to avoid and interlace with each other, which is difficult to handle and has low construction efficiency.

[0005] In a first aspect, the embodiments of this application provide a hybrid fiber concrete composite floor slab with side groove connections. The composite floor slab includes: a floor slab body; The floor slab body extends along a first direction. The floor slab body has opposite first and second ends along the first direction. Grooves are provided on the surface of the floor slab body, and the grooves are located at the first end and / or the second end of the floor slab body. First connecting bars are provided in the grooves, and the first connecting bars are used to connect the concrete beam.

[0006] Optionally, the number of the grooves is multiple, and the multiple grooves are spaced along a second direction, and the second direction is perpendicular to the first direction.

[0007] Optionally, the grooves penetrate through the side surface of the floor slab body in the first direction along the first direction, and the groove walls of the grooves are inclined relative to the surface of the floor slab body. The projection of the groove bottom in the thickness direction of the floor slab body is located inside the projection of the groove opening in the thickness direction of the floor slab body.

[0008] Optionally, the floor slab body includes a cast-in-place concrete layer and a precast slab layer arranged in a laminated manner; A first groove is provided on the cast-in-place concrete layer, and a second groove is provided on the precast slab layer. The first groove penetrates through the cast-in-place concrete layer, and the first groove and the second groove form the recess.

[0009] Optionally, the precast slab layer comprises steel fiber-polyvinyl alcohol hybrid fiber concrete, or basalt-polyvinyl alcohol hybrid fiber concrete; The steel fiber-polyvinyl alcohol hybrid fiber concrete comprises cement, silica fume, fly ash, water reducer, quartz sand, steel fiber, and polyvinyl alcohol. Among them, the dosage range of the cement is 360 - 500 kg / m³, the mass fraction range of the silica fume is 5% - 10%, the mass fraction range of the fly ash is 10% - 30%, the mass fraction range of the water reducer is 2.0% - 2.5%, the mass fraction range of the quartz sand is 50% - 70%, the mass fraction range of the steel fiber is 0.4% - 1.5%, and the mass fraction range of the polyvinyl alcohol is 0.6% - 0.9%; The basalt-polyvinyl alcohol hybrid fiber concrete comprises cement, silica fume, fly ash, river sand, water reducer, calcium carbonate whiskers, basalt fiber, and polyvinyl alcohol. Among them, the dosage range of the cement is 380 - 500 kg / m³, the mass fraction range of the silica fume is 5% - 10%, the mass fraction range of the fly ash is 20% - 30%, the mass fraction range of the water reducer is 2.0% - 2.5%, the mass fraction range of the river sand is 50% - 70%, and the mass fraction ranges of the basalt fiber, the calcium carbonate whiskers, and the polyvinyl alcohol are all 0.6% - 0.9%.

[0010] Optionally, the recess is filled with filling concrete, and the filling concrete fills the recess.

[0011] In a second aspect, an embodiment of the present application provides a building structure, characterized in that the building structure comprises a concrete beam and the composite floor slab according to any one of the first aspects above; The composite floor slab is located on one side of the concrete beam, and the concrete beam is connected to the first connecting reinforcement.

[0012] Optionally, the floor slab body comprises a cast-in-place concrete layer and a precast slab layer arranged in a laminated manner; A first groove is provided on the cast-in-place concrete layer, and a second groove is provided on the precast slab layer. The first groove penetrates through the cast-in-place concrete layer, and the first groove and the second groove form the recess; The first connecting reinforcement comprises a first reinforcement bar. The first reinforcement bar is arranged in the cast-in-place concrete, and a part of the first reinforcement bar extends into the first groove. A second connecting reinforcement is arranged in the concrete beam, and the second connecting reinforcement is connected to the first reinforcement bar.

[0013] Optionally, the first connecting rib further includes a second rib, the second rib is disposed in the precast slab layer, and a part of the second rib extends into the second groove, and the second connecting rib is connected to the second rib.

[0014] Optionally, one end of the second connecting rib is bent and anchored in the concrete beam, and the other end of the second connecting rib is tied to the second rib in the groove.

[0015] In a third aspect, an embodiment of the present application provides a building, which includes the composite floor slab according to any one of the above first aspects, or the building structure according to any one of the above second aspects.

[0016] In the embodiment of the present application, since the surface of the floor slab body is provided with a groove, and the groove is located at the first end and / or the second end of the floor slab body, and the first connecting rib is disposed in the groove, when it is necessary to connect the floor slab body to the concrete beam, the floor slab body is disposed on one side of the concrete beam, and the first connecting rib is located in the groove and does not extend outside the floor slab body, thereby effectively avoiding the problem that the steel bars extending outside the precast slab layer are likely to collide with the steel bars of the concrete beam, and the steel bars need to avoid and interpenetrate for positioning, which is difficult to handle. That is, in the embodiment of the present application, by providing a groove on the surface of the floor slab body and disposing the first connecting rib in the groove, when connecting the floor slab body to the concrete beam, it is effectively avoided that the steel bars extending outside the precast slab layer are aligned with the steel bars of the concrete beam, that is, the alignment process is omitted, and it is avoided that the steel bars extending outside the precast slab layer are likely to collide with the steel bars of the concrete beam, and the steel bars need to avoid and interpenetrate for positioning, which is difficult to handle and has low construction efficiency. Thereby, the connection efficiency of the floor slab body and the concrete beam is effectively improved, and the construction efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 One of the side views of a floor slab body provided by an embodiment of the present application; Figure 2 A schematic diagram of a precast slab layer provided by an embodiment of the present application; Figure 3 One of the schematic diagrams of the connection between a floor slab body and a concrete beam provided by an embodiment of the present application; Figure 4 Another schematic diagram of the connection between a floor slab body and a concrete beam provided by an embodiment of the present application; Figure 5 A partial schematic diagram of the connection between a floor slab body and a concrete beam provided by an embodiment of the present application; Figure 6 A schematic diagram of a second connecting rib provided by an embodiment of the present application; Figure 7 Schematic diagram showing a first shaped rib provided by an embodiment of the present application; Figure 8 Schematic diagram showing a second shaped rib provided by an embodiment of the present application.

[0018] Reference numerals: 10: Floor slab body; 11: Cast-in-place concrete layer; 12: Prefabricated slab layer; 101: Groove; 1011: First groove; 1012: Second groove; 102: Reinforced steel truss; 20: First connecting rib; 21: First rib; 22: Second rib; 001: First shaped rib; 002: Second shaped rib; 100: Concrete beam; 110: Second connecting rib; X: First direction; Y: Second direction. Detailed implementation manners

[0019] The features of the terms "first" and "second" in the description and claims of the present application may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally means an "or" relationship between the associated objects before and after.

[0020] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0021] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0022] As Figures 1 to 8 shown, the hybrid fiber concrete composite floor slab connected by the side groove of the slab includes: a floor slab body 10.

[0023] The floor slab body 10 extends along the first direction X. The floor slab body 10 has opposite first and second ends along the first direction X. A groove 101 is provided on the surface of the floor slab body 10, and the groove 101 is located at the first end and / or the second end of the floor slab body 10. A first connecting rib 20 is provided in the groove 101, and the first connecting rib 20 is used to connect the concrete beam 100.

[0024] In the embodiment of the present application, since a groove 101 is provided on the surface of the floor slab body 10, and the groove 101 is located at the first end and / or the second end of the floor slab body 10, and a first connecting rib 20 is provided in the groove 101. Therefore, when it is necessary to connect the floor slab body 10 to the concrete beam 100, the floor slab body 10 is arranged on one side of the concrete beam 100, and the first connecting rib 20 is located in the groove 101, and the first connecting rib 20 does not extend out of the floor slab body 10, thus effectively avoiding the problem that the steel bars extending out of the precast slab layer are prone to collide with the steel bars of the concrete beam 100, and the steel bars need to avoid and interlace to be in place, which is difficult to handle. That is, in the embodiment of the present application, by providing a groove 101 on the surface of the floor slab body 10 and a first connecting rib 20 in the groove 101, when connecting the floor slab body 10 to the concrete beam 100, it is effectively avoided that the steel bars extending out of the precast slab layer are aligned with the steel bars of the concrete beam 100, that is, the alignment process is omitted, and it is avoided that the steel bars extending out of the precast slab layer are prone to collide with the steel bars of the concrete beam 100, and the steel bars need to avoid and interlace to be in place, which is difficult to handle and has low construction efficiency. Thus, the connection efficiency of the connection between the floor slab body 10 and the concrete beam 100 is effectively improved, and the construction efficiency is improved.

[0025] It should be noted that in the embodiment of the present application, the groove 101 can be provided only at the first end of the floor slab body 10, or only at the second end of the floor slab body 10, or the groove 101 can be provided at the first end of the floor slab body 10, and at the same time, the groove 101 can be provided at the second end of the floor slab body 10. In this regard, the embodiment of the present application does not make any limitation here.

[0026] In addition, steel bars are usually provided in the concrete beam 100. When connecting the floor slab body 10 to the concrete beam 100, the steel bars of the concrete beam 100 are connected to the first connecting rib 20 in the groove 101.

[0027] In addition, in some embodiments, the number of the grooves 101 is multiple, and the multiple grooves 101 are spaced apart along the second direction Y, and the second direction Y is perpendicular to the first direction X. By such an arrangement, when connecting the floor slab body 10 to the concrete beam 100, the first connecting ribs 20 in the multiple grooves 101 are all connected to the concrete beam 100, so that the connection between the floor slab body 10 and the concrete beam 100 is more firm.

[0028] It should be noted that the number of the grooves 101 is set according to actual needs. For example, the number of the grooves 101 is 4, or for another example, the number of the grooves 101 is 5, or for yet another example, the number of the grooves 101 is 6. The specific number of the grooves 101 is not limited in the embodiments of the present application.

[0029] In addition, when the grooves 101 are distributed at intervals along the second direction Y, the distance between two adjacent grooves 101 is set according to actual needs. For example, the center distance between the centers of two adjacent grooves 101 is 250 mm, or for another example, the center distance between the centers of two adjacent grooves 101 is 300 mm. In this regard, the embodiments of the present application do not make any limitations here.

[0030] In addition, in some embodiments, the groove 101 penetrates through the side surface of the floor slab body 10 in the first direction X, and the groove wall of the groove 101 is inclined relative to the surface of the floor slab body 10. The projection of the bottom of the groove 101 in the thickness direction of the floor slab body 10 is located inside the projection of the notch of the groove 101 in the thickness direction of the floor slab body 10.

[0031] Since the groove 101 penetrates through the side surface of the floor slab body 10 in the first direction X, when connecting the floor slab body 10 with the concrete beam 100, the steel bars of the concrete beam 100 are convenient to extend into the groove 101 to be connected with the first connecting bars 20 in the groove 101, so as to facilitate the connection between the concrete beam 100 and the floor slab body 10. In addition, the groove wall of the groove 101 is inclined relative to the surface of the floor slab body 10, and the projection of the bottom of the groove 101 in the thickness direction of the floor slab body 10 is located inside the projection of the notch of the groove 101 in the thickness direction of the floor slab body 10, which is equivalent to that the size of the notch of the groove 101 is larger than the size of the bottom of the groove 101, and the inclination of the groove wall enables the tensile strength between the filling material and the floor slab body 10 to be improved during subsequent filling in the groove 101, ensuring sufficient interfacial bonding.

[0032] It should be noted that the groove 101 has a bottom and a plurality of groove walls. The bottom of the groove 101 is parallel to the surface of the floor slab body 10, and the surface of the floor slab body 10 is the surface of the floor slab body 10 in its thickness direction. The groove walls of the groove 101 are inclined relative to the surface of the floor slab body 10. Specifically, each groove wall of the groove 101 is inclined relative to the surface of the floor slab body 10, and the included angle between the groove wall and the surface of the floor slab body 10 can be set according to actual needs. For example, the included angle between the groove wall and the surface of the floor slab body 10 is 45°, or for another example, the included angle between the groove wall and the surface of the floor slab body 10 is 60°. The specific value of the included angle between the groove wall and the surface of the floor slab body 10 is not limited in the embodiments of the present application. Wherein, the surface of the floor slab body 10 is the surface of the floor slab body 10 in its thickness direction.

[0033] In addition, in the embodiment of the present application, when the first end and the second end of the floor slab body 10 are both provided with grooves 101, the floor slab body 10 has opposite first side surface and second side surface along the first direction X. The first side surface is located at the first end, and the second side surface is located at the second end. The groove 101 at the first end penetrates the first side surface along the first direction X, and the groove 101 at the second end penetrates the second side surface along the first direction X.

[0034] In addition, in the embodiment of the present application, the floor slab body 10 includes a cast-in-place concrete layer 11 and a precast slab layer 12 which are stacked; a first groove 1011 is provided on the cast-in-place concrete layer 11, and a second groove 1012 is provided on the precast slab layer 12. The first groove 1011 penetrates the cast-in-place concrete layer 11, and the first groove 1011 and the second groove 1012 form the groove 101.

[0035] Wherein, when forming the groove 101 on the floor slab body 10, first form the second groove 1012 on the precast slab layer 12, then when making the cast-in-place concrete layer 11 on the precast slab layer 12, set a baffle in the second groove 1012, and then form the cast-in-place concrete layer 11. Removing the baffle can make the first groove 1011 formed on the cast-in-place concrete layer 11, and the first groove 1011 communicates with the second groove 1012.

[0036] In addition, in the embodiment of the present application, the bottom of the second groove 1012 is the bottom of the groove 101, and the inclination degree of the groove wall of the second groove 1012 is the inclination degree of the groove wall of the groove 101.

[0037] In addition, in the embodiments of the present application, the precast slab layer 12 includes steel fiber-polyvinyl alcohol hybrid fiber concrete, or basalt-polyvinyl alcohol hybrid fiber concrete; the steel fiber-polyvinyl alcohol hybrid fiber concrete includes cement, silica fume, fly ash, water reducer, quartz sand, steel fiber, and polyvinyl alcohol. Among them, the cement dosage ranges from 360 to 500 kg / m³, the mass fraction of silica fume ranges from 5% to 10%, the mass fraction of fly ash ranges from 10% to 30%, the mass fraction of water reducer ranges from 2.0% to 2.5%, the mass fraction of quartz sand ranges from 50% to 70%, the mass fraction of steel fiber ranges from 0.4% to 1.5%, and the mass fraction of polyvinyl alcohol ranges from 0.6% to 0.9%; the basalt-polyvinyl alcohol hybrid fiber concrete includes cement, silica fume, fly ash, river sand, water reducer, calcium carbonate whiskers, basalt fiber, and polyvinyl alcohol. Among them, the cement dosage ranges from 380 to 500 kg / m³, the mass fraction of silica fume ranges from 5% to 10%, the mass fraction of fly ash ranges from 20% to 30%, the mass fraction of water reducer ranges from 2.0% to 2.5%, the mass fraction of river sand ranges from 50% to 70%, and the mass fractions of basalt fiber, calcium carbonate whiskers, and polyvinyl alcohol all range from 0.6% to 0.9%.

[0038] Among them, when the precast slab layer 12 includes basalt-polyvinyl alcohol hybrid fiber concrete, it can not only reduce the self-weight of the floor slab body 10, inhibit the expansion of cracks, improve the ductility, bearing capacity and seismic performance of the floor slab body 10, but also reduce the maintenance cost of the floor slab body 10, improve the carbonation resistance and durability of the floor slab body 10, thereby effectively enhancing the service life and durability of the composite floor slab in a complex environment.

[0039] In addition, in the embodiments of the present application, the advantage of basalt-polyvinyl alcohol hybrid fiber concrete is that it utilizes the advantage that calcium carbonate whiskers can be used as short-cut fibers to reduce the dosage of polyvinyl alcohol, thereby reducing the construction cost without reducing the strength. In the embodiments of the present application, the advantage of steel fiber-polyvinyl alcohol hybrid fiber concrete is that by incorporating polyvinyl alcohol, while achieving high strength and high ductility of the concrete, the porosity of the microstructure is less and the density is higher, so that the fibers are tightly embedded in the cement matrix and are randomly distributed to form a whole.

[0040] In addition, in the embodiments of the present application, both the basalt-polyvinyl alcohol hybrid fiber concrete and the steel fiber-polyvinyl alcohol hybrid fiber concrete contain water reducers, which greatly improve the fluidity of the hybrid fiber concrete, densify the bottom plate structure, and facilitate construction.

[0041] In addition, in the embodiments of the present application, for the steel fiber-polyvinyl alcohol hybrid fiber concrete, the ratio of each material can be as follows: Cement: silica fume: fly ash: water: water reducer: quartz sand: steel fiber: polyvinyl alcohol = 1: 0.14: 0.29: 0.29: 0.04: 1.53: 0.11: 0.04.

[0042] For basalt - polyvinyl alcohol hybrid fiber concrete, the mix ratio of each material can be as follows: Cement∶silica fume: fly ash: river sand: water: water reducer: calcium carbonate whisker∶basalt fiber∶PVA = 1: 0.09: 0.36: 0.66: 0.43: 0.04: 0.024: 0.025: 0.011.

[0043] In addition, in the embodiment of the present application, the precast slab layer 12 contains silica fume, which can improve the compactness and impermeability; the precast slab layer 12 contains fly ash, which can improve the workability and reduce the heat of hydration; the precast slab layer 12 contains a water reducer, which can compensate for the fluidity loss caused by the fibers.

[0044] In addition, in the embodiment of the present application, for the precast slab layer 12 formed by steel fibers, the sand ratio of the quartz sand in the precast slab layer 12 should be 50% - 70%. For every 0.3% (volume ratio) increase in the steel fiber content, the sand ratio needs to be increased by 2% accordingly to wrap the fibers and improve the workability. Medium - coarse sand (fineness modulus 2.6 - 3.0) should be selected for the quartz sand, with a mud content ≤ 3%, and the coarse aggregate particle size: ≤ 20 mm; too large a particle size will affect the fiber dispersion. In addition, the length of the steel fiber is 30 - 60 mm, the diameter is 0.3 - 0.8 mm, and the tensile strength ≥ 700 MPa; when the steel fiber volume ratio exceeds 0.8%, the mixing process needs to be adjusted to prevent agglomeration, and the content needs to be determined according to the anti - cracking and anti - impact requirements. In addition, polyvinyl alcohol fibers can inhibit the development of micro - cracks.

[0045] In addition, in the embodiment of the present application, for basalt - polyvinyl alcohol hybrid fiber concrete, the quartz sand in the precast slab layer 12 includes coarse sand, slightly coarse sand, medium sand, slightly medium sand, fine sand and extra - fine sand, and the mass fractions of quartz sand of various sizes are respectively: m 粗 = 348.87 kg·m -3 ; m 微粗 = 233.74 kg·m -3 ; m 中 = 195.37 kg·m -3 ; m 微中 = 129.08 kg·m -3 ; m 细 = 111.16 kg·m -3 ; m 特细 = 94.19 kg·m -3 .

[0046] Of course, in the embodiment of the present application, the precast slab layer 12 may also include ordinary concrete. In this case, it is equivalent that the precast slab layer 12 is made of ordinary concrete, and the ordinary concrete does not contain hybrid fibers, that is, it does not contain steel fibers, polyvinyl alcohol, etc.

[0047] In addition, in the embodiment of the present application, a steel bar truss 102 is further provided in the floor slab body 10 to further improve the strength of the floor slab body 10 through the steel bar truss 102. Among them, the steel bar truss 102 includes an upper chord, a lower chord, and a corrugated web bar. The corrugated web bar is located between the upper chord and the lower chord, and the upper chord and the lower chord are connected by the corrugated web bar.

[0048] Among them, in the embodiment of the present application, the upper chord of the steel bar truss 102 uses C15 steel bars, the lower chord uses D15 steel bars, and the corrugated web bar uses A10 steel bars. In addition, the ordinary concrete uses C40 concrete.

[0049] In addition, in some embodiments, the groove 101 is filled with filling concrete (not shown in the figure), and the filling concrete fills the groove 101. Through such a setting, the filling concrete wraps the first connecting bar 20 in the groove 101. When connecting the floor slab body 10 to the concrete beam 100, the steel bars of the concrete beam 100 are connected to the first connecting bar 20 in the groove 101, and then the groove 101 is filled with the filling concrete. Thus, the filling concrete will wrap the first connecting bar 20 and the steel bars of the concrete beam 100, making the connection between the floor slab body 10 and the concrete beam 100 more firm, and the filling concrete also improves the strength of the floor slab body 10.

[0050] It should be noted that when the groove wall of the groove 101 is inclined relative to the surface of the floor slab body 10, at this time, once the filling concrete is filled in the groove 101, the inclined groove wall of the groove 101 makes it difficult for the filling concrete to separate from the cast-in-place concrete layer 11 and the precast slab layer 12, that is, the inclined groove wall of the groove 101 optimizes the stress transfer angle and effectively reduces the risk of interface peeling.

[0051] In addition, in the embodiment of the present application, the material of the filling concrete is the same as that of the precast slab layer 12, that is, the material composition of the filling concrete is the same as that of the precast slab layer 12, thereby effectively improving the strength of the floor slab body 10; of course, the material of the filling concrete is also the same as that of the cast-in-place concrete, that is, the material composition of the filling concrete is the same as that of the cast-in-place concrete. In this regard, the embodiment of the present application does not make any limitation here.

[0052] The embodiment of the present application provides a building structure, which includes a concrete beam 100 and the composite floor slab in any one of the above embodiments; the composite floor slab is located on one side of the concrete beam 100, and the concrete beam 100 is connected to the first connecting bar 20.

[0053] In addition, in some embodiments, the floor slab body 10 includes a cast-in-place concrete layer 11 and a precast slab layer 12 which are stacked; a first groove 1011 is provided on the cast-in-place concrete layer 11, and a second groove 1012 is provided on the precast slab layer 12. The first groove 1011 penetrates through the cast-in-place concrete layer 11, and the first groove 1011 and the second groove 1012 form a groove 101. The first connecting bar 20 includes a first bar 21, the first bar 21 is arranged in the cast-in-place concrete, and part of the first bar 21 extends into the first groove 1011. A second connecting bar 110 is arranged in the concrete beam 100, and the second connecting bar 110 is connected to the first bar 21.

[0054] Wherein, the second connecting bar 110 and the first bar 21 are connected by a first shaped bar 001. Specifically, the first shaped bar 001 is a D-shaped short bar. When connecting the second connecting bar 110 and the first bar 21 by the first shaped bar 001, first bind the second connecting bar 110 and the first bar 21, and then connect the second connecting bar 110 and the first bar 21 by the first shaped bar 001.

[0055] Of course, the first shaped bar 001 can also be other shaped short bars. For example, the first shaped bar 001 is a C-shaped short bar. The specific shape of the first shaped bar 001 is not limited in the embodiments of the present application.

[0056] In addition, in some embodiments, the first connecting bar 20 further includes a second bar 22, the second bar 22 is arranged in the precast slab layer 12, and part of the second bar 22 extends into the second groove 1012. The second connecting bar 110 is connected to the second bar 22.

[0057] Wherein, the second connecting bar 110 and the second bar 22 are connected by a second shaped bar 002. Specifically, the second shaped bar 002 is a bent bar. When connecting the second connecting bar 110 and the second bar 22 by the second shaped bar 002, first bind the second connecting bar 110 and the second bar 22, and then connect the second connecting bar 110 and the second bar 22 by the second shaped bar 002.

[0058] In addition, in the embodiments of the present application, both the first shaped bar 001 and the second shaped bar 002 are made of A6 steel bars.

[0059] In addition, in the embodiment of the present application, a groove 101 is provided on the floor slab body 10. When the floor slab body 10 is connected to the concrete beam 100, the second connecting rib 110 and the first rib 21 are tied and connected via D-shaped short ribs, and the second connecting rib 110 and the second rib 22 are tied and connected via bent ribs, thereby forming a three-dimensional force transmission path through the bite effect of the groove 101. Compared with the traditional plane connection, the shear bearing capacity is greatly improved, and the durability and reliability of the connection parts of the prefabricated and cast-in-place concrete structures are improved, which has important practical significance for extending the service life of the structure and improving the comprehensive performance of the structure.

[0060] The following is an explanation of the production of the floor slab body 10 provided in the embodiment of the present application: When the precast slab layer 12 of the floor slab body 10 is ordinary concrete, when making the precast slab layer 12 of the floor slab body 10, first, support the mold and set the groove 101 mold, and set a groove 101 mold every 100mm; after the mold support is completed, clean the mold and apply a water-based release agent on the inner surface of the mold to ensure that the surface of the bottom plate is flat and non-sticky after demolding. Then tie the second reinforcement 22 with the steel truss 102 and the first reinforcement 21. After the tying is completed, ordinary concrete is used for pouring, and the surface is vibrated twice by plane; after curing for 7 days, lift and demold. At this time, the cubic compressive strength of the concrete of the precast slab layer 12 should reach 75% of the standard value and should not be less than 15N / mm 2 After passing the strength acceptance, it will be roughened in the prefabrication plant to form a prefabricated board layer.

[0061] The following is a description of the process of connecting the concrete beam 100 and the floor slab body 10 provided in the embodiment of the present application: First, the precast slab layer 12 is cleaned, and after hoisting to the designated position, the groove 101 side is close to the cast-in-place beam reinforcement, one end of the second connecting reinforcement 110 is bent and anchored into the concrete beam 100, and the other end of the second connecting reinforcement 110 is tied to the second reinforcement 22 in the groove 101; then the bent reinforcement and the D-shaped short reinforcement are respectively placed at both ends of the binding length of the second connecting reinforcement 110 and the first reinforcement 21 to constrain, and tied, so that the concrete beam 100 is fully connected to the floor slab body 10, and the overall force performance is improved; after the binding is completed, the surface of the groove 101 is cleaned, and the steel fiber-polyvinyl alcohol mixed fiber concrete is filled behind the support formwork in the groove 101; after one day of maintenance, the mold is removed, and concrete is cast in place at the position of the concrete beam 100, the position of the cast-in-place concrete layer 11, and the position of the groove 101. Before pouring, the dust on the surface of the precast slab layer 12 is washed and fully wetted with water to ensure that the concrete at the interface of the groove 101 and the top plate are fully bonded to improve the integrity.

[0062] It should be noted that the second connecting bar 110 is made of C10 steel bars. The part of the second connecting bar 110 extending into the concrete beam 100 is bent, and the bending angle is 45° for the inclined bar, which effectively inhibits the expansion of beam cracks.

[0063] The embodiment of the present application provides a building, which includes the composite floor slab in any one of the above embodiments, or the building structure in any one of the above embodiments.

[0064] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0065] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present application. The scope of the present application is defined by the claims and their equivalents.

Claims

1. A hybrid fiber concrete composite floor slab with a groove connection on the slab side, characterized in that The composite floor slab includes: a floor slab body; The floor slab body extends in a first direction, and the floor slab body has opposite first and second ends in the first direction. A groove is provided on the surface of the floor slab body, and the groove is located at the first end and / or the second end of the floor slab body. A first connecting bar is provided in the groove, and the first connecting bar is used to connect a concrete beam.

2. The composite floor slab according to claim 1, wherein, The number of the grooves is multiple, and the multiple grooves are spaced apart in a second direction, and the second direction is perpendicular to the first direction.

3. The composite floor slab according to claim 1, characterized in that, The groove penetrates through the side surface of the floor slab body in the first direction in the first direction, and the groove wall is inclined relative to the surface of the floor slab body. The projection of the bottom of the groove in the thickness direction of the floor slab body is located inside the projection of the notch of the groove in the thickness direction of the floor slab body.

4. The composite floor slab according to claim 1, characterized in that, The floor slab body includes a cast-in-place concrete layer and a precast slab layer arranged in a laminated manner; A first groove is provided on the cast-in-place concrete layer, and a second groove is provided on the precast slab layer. The first groove penetrates through the cast-in-place concrete layer, and the first groove and the second groove form the groove.

5. The composite floor slab according to claim 4, characterized in that, The precast slab layer includes steel fiber-polyvinyl alcohol hybrid fiber concrete, or basalt-polyvinyl alcohol hybrid fiber concrete; The steel fiber-polyvinyl alcohol hybrid fiber concrete includes cement, silica fume, fly ash, water reducer, quartz sand, steel fiber, and polyvinyl alcohol. Among them, the cement dosage range is 360-500 kg / m³, the mass fraction range of silica fume is 5%–10%, the mass fraction range of fly ash is 10%–30%, the mass fraction range of water reducer is 2.0%–2.5%, the mass fraction range of quartz sand is 50%–70%, the mass fraction range of steel fiber is 0.4%–1.5%, and the mass fraction range of polyvinyl alcohol is 0.6%–0.9%; The basalt-polyvinyl alcohol hybrid fiber concrete includes cement, silica fume, fly ash, river sand, water reducer, calcium carbonate whisker, basalt fiber, and polyvinyl alcohol. Among them, the cement dosage range is 380-500 kg / m³, the mass fraction range of silica fume is 5%–10%, the mass fraction range of fly ash is 20%–30%, the mass fraction range of water reducer is 2.0%–2.5%, the mass fraction range of river sand is 50%–70%, and the mass fraction ranges of basalt fiber, calcium carbonate whisker, and polyvinyl alcohol are all 0.6%–0.9%.

6. The composite floor slab according to any one of claims 1-5, characterized in that, The groove is filled with filling concrete, and the filling concrete fills the groove.

7. A building structure, characterized in that, The building structure includes a concrete beam and the composite floor slab according to any one of claims 1-6; The composite floor slab is located on one side of the concrete beam, and the concrete beam is connected to the first connecting bar.

8. The building structure according to claim 7, characterized in that, The floor slab body includes a cast-in-place concrete layer and a precast slab layer arranged in a laminated manner; A first groove is provided on the cast-in-place concrete layer, and a second groove is provided on the precast slab layer. The first groove penetrates through the cast-in-place concrete layer, and the first groove and the second groove form the recess. The first connecting reinforcement includes a first bar. The first bar is arranged in the cast-in-place concrete, and part of the first bar extends into the first groove. A second connecting reinforcement is arranged in the concrete beam, and the second connecting reinforcement is connected to the first bar.

9. The building structure according to claim 8, wherein The first connecting reinforcement further includes a second bar. The second bar is arranged in the precast slab layer, and part of the second bar extends into the second groove. The second connecting reinforcement is connected to the second bar.

10. The building structure according to claim 9, characterized in that, One end of the second connecting reinforcement is bent and anchored in the concrete beam, and the other end of the second connecting reinforcement is tied to the second bar in the recess.

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