A precast slab assembly and floor structure

Abstract

This application relates to the field of cleanroom construction, disclosing a precast Gypsy slab assembly and floor structure. A precast Gypsy slab assembly includes a precast slab and a duct to be installed. The precast slab includes a floor slab body and multiple fixing components. The floor slab body includes a first surface and a second surface arranged opposite each other along a first direction. The fixing components include a fixing duct and embedded fasteners. The fixing duct penetrates the floor slab body along the first direction to form ventilation holes. Both the embedded fasteners and the fixing duct protrude from the first surface. The fixing components and the floor slab body are cast as an integral structure in a factory. Each fixing component is used to connect to one duct to be installed. The duct to be installed includes a duct body and a fixing lug fixed to the outer side of the duct body. The duct body is used to fit around the outside of the fixing duct and is connected to the embedded fasteners through the fixing lugs. When concrete is poured onto the precast slab, the concrete slurry will not enter the ventilation holes of the precast slab, ensuring that the cleanliness of the ventilation hole walls meets the requirements of a cleanroom.

Description

Technical Field

[0001] This application relates to the field of cleanroom construction technology, and in particular to a prefabricated slab assembly and floor structure. Background Technology

[0002] High-precision electronic manufacturing plants have high requirements for floor vibration control and strict air cleanliness in the production environment. The core production layer generally adopts a slab-column structure formed by cheeseboard, which not only improves the rigidity of the floor but also realizes the function of vertical laminar flow of purified air from top to bottom, meeting the high anti-micro-vibration and high cleanliness requirements of electronic manufacturing plants.

[0003] High-precision industries are characterized by high investment costs and rapid technological iteration, thus requiring tight construction schedules. Currently, high-precision electronic factories in China generally adopt cast-in-place construction, which requires on-site formwork, rebar tying, pouring, and curing. This presents challenges such as difficult on-site construction operations, difficulty in quality control, long construction periods, and high labor demands. Summary of the Invention

[0004] This application discloses a prefabricated Qishi slab assembly and floor structure, which simplifies on-site construction procedures.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] In a first aspect, embodiments of this application provide a prefabricated chevron plate assembly, comprising: a prefabricated plate and a cylinder to be assembled;

[0007] The precast slab includes a floor slab body and multiple fixing components;

[0008] The floor slab body includes a first surface and a second surface disposed opposite to each other along a first direction;

[0009] The fixing assembly includes a fixing cylinder and a pre-embedded fixing component; the fixing cylinder penetrates the floor slab body along the first direction to form a ventilation hole; both the pre-embedded fixing component and the fixing cylinder protrude from the first surface; the fixing assembly and the floor slab body are cast as an integral structure in the factory; each fixing assembly is used to connect one of the cylinders to be installed.

[0010] The cylinder to be installed includes a cylinder body and a fixed lug fixed to the outer side of the cylinder body; the cylinder body is used to be sleeved on the outside of the fixed cylinder and connected to the pre-embedded fixing component through the fixed lug.

[0011] The prefabricated Qishi slab assembly provided in this application embodiment is processed in a prefabrication factory, transported to the construction site by transportation equipment, and then assembled on-site into an integral floor structure. This realizes the prefabricated structure of the electronic factory building. Compared with the on-site construction and pouring of floor slabs in the prior art, it reduces on-site support, formwork, and pouring construction, greatly simplifies the construction process, and enables the early delivery and early production of the electronic factory building.

[0012] To facilitate transportation, the prefabricated Qishi slab assembly provided in this application divides the traditional Qishi cylinder into two parts. The first part is a fixed cylinder, which is cast integrally with the floor slab body in the prefabrication plant. The second part is a cylinder to be assembled, which is assembled with the fixed cylinder on the construction site. The fixed cylinder protrudes from the first surface of the floor slab body, which facilitates the installation and positioning of the cylinder to be assembled without the need for on-site remeasurement and positioning.

[0013] Simultaneously, after the installation of the loading cylinder, since it is connected to the pre-embedded fixing component, and both the pre-embedded fixing component and the fixed cylinder are pre-cast integral structures with the floor slab body, the loading cylinder and the fixed cylinder are relatively fixed. When concrete is poured at this time, the loading cylinder will not float relative to the fixed cylinder under buoyancy, effectively preventing the upper loading cylinder from floating or shifting, and avoiding concrete leakage within the fixed cylinder and the loading cylinder. In other words, when concrete is poured onto the precast slab, concrete slurry will not enter the ventilation holes of the precast slab, ensuring that the cleanliness of the ventilation hole walls meets the requirements of a cleanroom.

[0014] In some embodiments, the embedded fastener includes an embedded part, an embedded plate, and a connecting plate; the embedded plate includes a first surface and a second surface disposed opposite to each other along the first direction, the first surface being connected to the connecting plate, and the second surface being connected to the embedded part; the first surface is flush with the first surface.

[0015] There is a first gap between the connecting plate and the outer wall of the fixed cylinder, and the first gap is greater than or equal to the wall thickness of the cylinder body.

[0016] In some embodiments, a first stirrup group and a second stirrup group are provided in the floor slab body. The first stirrup group includes a plurality of stirrups arranged at intervals along a second direction, and the second stirrup group includes a plurality of stirrups arranged at intervals along a third direction. All the stirrups protrude from the first surface.

[0017] The orthographic projections of the stirrups on the floor slab body do not overlap with the orthographic projections of the ventilation holes on the floor slab body;

[0018] The orthographic projections of the stirrups on the floor slab body do not overlap with the orthographic projections of the embedded plates on the floor slab body.

[0019] In some embodiments, the fixing assembly includes at least one set of pre-embedded fixing members arranged symmetrically along the radial direction of the fixing cylinder; the arrangement direction of the pre-embedded fixing members on both sides arranged symmetrically has an angle with both the second direction and the third direction.

[0020] In some embodiments, the arrangement direction of the pre-embedded fixing members on both sides of the symmetrical arrangement forms an angle of 45° with the second direction and the third direction.

[0021] In some embodiments, the fixed lug is fixed to the first end of the cylinder body, and the first end of the cylinder body is used to fit over the outside of the fixed cylinder.

[0022] In some embodiments, the fixed hook and the cylinder body are an integral structure.

[0023] In some embodiments, a cantilever is provided on the side wall of the floor slab body near the second surface, the cantilever including a third surface and a fourth surface disposed opposite to each other along the first direction; along the first direction, the third surface is located between the first surface and the second surface, and the fourth surface is located on the same plane as the second surface.

[0024] In some embodiments, the pick-up ear further includes a fifth surface; the fifth surface is connected to the third surface and is also used to connect to the fourth surface; the pick-up ear is provided with an L-shaped edge banding; the edge banding covers the fifth surface and a portion of the pick-up ear facing away from the third surface; the edge banding does not protrude from the third surface.

[0025] In some embodiments, the cantilever further includes a fifth surface, a sixth surface, and a seventh surface connected in sequence; the fifth surface is connected to the third surface on the side away from the sixth surface, and the seventh surface is connected to the fourth surface on the side away from the sixth surface; wherein: the distance between the sixth surface and the third surface is less than the distance between the fourth surface and the third surface, and the distance between the seventh surface and the sidewall of the floor slab body is less than the distance between the fifth surface and the sidewall of the floor slab body;

[0026] The ear is provided with an edge banding; the edge banding covers the fifth surface, the sixth surface and the seventh surface; the edge banding does not protrude from the third surface, and the side of the edge banding away from the sixth surface is flush with the fourth surface.

[0027] Secondly, embodiments of this application also provide a floor structure, including a plurality of precast slabs as described in any of the first aspects; a cast-in-place section is formed at the joint of two adjacent precast slabs; a superimposed cast-in-place layer is laid on the precast slab and connected to the cast-in-place section between the slabs.

[0028] Thirdly, embodiments of this application also provide a floor structure, including multiple precast slab assemblies as provided in some embodiments of the first aspect; a cast-in-place section is formed at the joint of two adjacent precast slabs; a superimposed cast-in-place layer is laid on the precast slab and connected to the cast-in-place section between the slabs;

[0029] The superimposed cast-in-place layer on the slab includes a first integrated steel cage and a second integrated steel cage; the first integrated steel cage extends along the second direction and is connected to the first stirrup group, and the second integrated steel cage extends along the third direction and is connected to the second stirrup group.

[0030] The first integrated steel cage and / or the second integrated steel cage include high-limb stirrups and low-limb stirrups arranged alternately along their extension direction, with one high-limb stirrup connected to one stirrup and one low-limb stirrup connected to one stirrup.

[0031] The lower stirrup abuts against the floor slab body; the upper stirrup has a gap with the floor slab body.

[0032] In some embodiments, the superimposed cast-in-place layer on the slab further includes a first rear-inserted waist bar, a second rear-inserted waist bar, and a third rear-inserted waist bar; the first rear-inserted waist bar is used to insert into the first integrated steel cage and connect to the first stirrup group after the first integrated steel cage is fixed to the first stirrup group.

[0033] The second rear insert bar is used to insert into the interior of the second integrated steel cage and connect with the second stirrup group after the second integrated steel cage is fixed to the second stirrup group;

[0034] The third rear insert waist bar is used to be inserted into the second integrated steel cage and connected to the second integrated steel cage after the second integrated steel cage is fixed to the second stirrup group.

[0035] The distance between the third rear insert reinforcement and the floor slab body is greater than the distance between the second rear insert reinforcement and the floor slab body.

[0036] Fourthly, embodiments of this application also provide a floor structure, including multiple precast slab assemblies as provided in some embodiments of the first aspect; a cast-in-place section is formed at the joint of two adjacent precast slabs; an overlay cast-in-place layer is laid on the precast slab and connected to the cast-in-place section between the slabs;

[0037] The cast-in-place section between the slabs includes a grout-blocking strip, which contacts the cantilevered surfaces of two adjacent precast slabs and at least covers the joint formed by the two adjacent precast slabs.

[0038] Fifthly, embodiments of this application also provide a floor structure, including multiple precast slab assemblies as provided in some embodiments of the first aspect; a cast-in-place section is formed at the joint of two adjacent precast slabs; an overlay cast-in-place layer is laid on the precast slab and connected to the cast-in-place section between the slabs;

[0039] A sealing strip is snapped onto the side of the joint between two adjacent precast slabs away from the cast-in-place section between the slabs. The sealing strip contacts the cantilevered surface of the two adjacent precast slabs and covers at least the joint formed by the two adjacent precast slabs. Attached Figure Description

[0040] Figure 1 A three-dimensional perspective view of a prefabricated slab in a prefabricated slab assembly provided in this application embodiment;

[0041] Figure 2 This application provides a schematic diagram of the structure of a prefabricated slab assembly with a cylinder to be installed.

[0042] Figure 3 A top view of a precast slab in a precast slab assembly provided in this application embodiment;

[0043] Figure 4 An enlarged view of a fixing component in a prefabricated slab assembly provided in an embodiment of this application;

[0044] Figure 5 An enlarged view of a fixing component in a prefabricated slab assembly after being assembled with a cylinder, provided in an embodiment of this application;

[0045] Figure 6 A cross-sectional view of a fixing component in a prefabricated slab assembly provided in this application embodiment;

[0046] Figure 7 A cross-sectional view of a prefabricated slab assembly containing a cylinder to be installed, provided in an embodiment of this application;

[0047] Figure 8 This application provides a cross-sectional view of a fixing component in a prefabricated slab assembly after it has been assembled with a cylinder to be installed.

[0048] Figure 9 and Figure 10 This application provides a schematic diagram of the structure of a pre-embedded fastener in a precast slab assembly.

[0049] Figure 11 A top view of a precast slab in another precast slab assembly provided in this application embodiment;

[0050] Figure 12 This is a schematic diagram of the cantilever structure of a precast slab in a precast slab assembly provided in an embodiment of this application;

[0051] Figure 13 A schematic diagram of the cantilever structure of a precast slab in another precast slab assembly provided in this application embodiment;

[0052] Figure 14 A top view of a precast slab in another precast slab assembly provided in this application embodiment;

[0053] Figure 15 This application provides a schematic diagram of the structure of a precast slab joint in a floor structure.

[0054] Figure 16 This is a structural schematic diagram of the precast slab joint in another floor structure provided in an embodiment of this application;

[0055] Figure 17 This application provides a schematic diagram of the arrangement of grout sealing strips in a floor structure.

[0056] Figure 18 This is a structural schematic diagram of a first integrated steel cage in a floor structure provided in an embodiment of this application;

[0057] Figure 19 This application provides a schematic diagram of the structure of a second integrated steel cage in a floor structure.

[0058] Figure 20 This application provides a schematic diagram of a precast slab concealed beam in a floor structure.

[0059] Figure 21 An assembly drawing of a first integrated steel cage and a precast slab hidden beam in a floor structure provided for an embodiment of this application;

[0060] Figure 22 An assembly drawing of a second integrated steel cage and a precast slab hidden beam in a floor structure provided for an embodiment of this application;

[0061] Figure 23 An assembly drawing of high-limb stirrups and precast slab hidden beam stirrups in a floor structure provided for an embodiment of this application;

[0062] Figure 24 An assembly drawing of low-limb stirrups and precast slab hidden beam stirrups in a floor structure provided for an embodiment of this application;

[0063] Icons: 100 - Precast slab; 200 - Cylinder to be installed; 300 - Grouting strip; 400 - Joint sealing strip; 500 - First integrated reinforcing cage; 600 - Second integrated reinforcing cage; 700 - First rear-inserted reinforcing bar; 800 - Second rear-inserted reinforcing bar; 900 - Third rear-inserted reinforcing bar; 101 - Joint; 110 - Slab body; 120 - Fixing component; 110a - First surface; 110b - Second surface; 110c - Ventilation hole; 110d - Side wall; 111 - First stirrup group; 112 - Second stirrup group; 113 - Cantilever; 114 - Edge sealing component; 113a - Third surface; 113b - Fourth surface; 113 c - Fifth surface; 113d - Sixth surface; 113e - Seventh surface; 1111 - Stirrup; 1112 - Waist reinforcement; 1113 - Longitudinal reinforcement; 121 - Fixing cylinder; 122 - Embedded fastener; 1221 - Embedded part; 1222 - Embedded plate; 1223 - Connecting plate; 1222a - First surface; 1222b - Second surface; 210 - Cylinder body; 220 - Fixing lug; 230 - Nail; 510 - High-limb stirrup; 520 - Low-limb stirrup; 530 - Longitudinal reinforcement; 540 - Waist reinforcement; 550 - Tie bar; 610 - High-limb stirrup; 620 - Low-limb stirrup; 630 - Longitudinal reinforcement; 910 - Post-tying tie bar. Detailed Implementation

[0064] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. In the description of the embodiments of this application, unless otherwise stated, " / " means "or", for example, A / B can mean A or B; "and / or" in the text is merely a description of the relationship between related objects, indicating that there can be three relationships, for example, A and / or B can represent: A alone, A and B at the same time, and B alone. In addition, in the description of the embodiments of this application, "multiple" means two or more.

[0065] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature, and in the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more.

[0066] like Figures 1-8As shown, this application embodiment provides a prefabricated slab assembly, including: a prefabricated slab 100 and a mounting cylinder 200; the prefabricated slab 100 includes a floor slab body 110 and a plurality of fixing components 120; the floor slab body 110 includes a first surface 110a and a second surface 110b disposed opposite to each other along a first direction. The first direction is the thickness direction of the prefabricated slab 100, i.e. Figure 1 In the Z-direction.

[0067] The fixing component 120 includes a fixing cylinder 121 and a pre-embedded fixing member 122; the fixing cylinder 121 penetrates the floor slab body 110 along a first direction to form a ventilation hole 110c. Both the pre-embedded fixing member 122 and the fixing cylinder 121 protrude from the first surface 110a; the fixing component 120 and the floor slab body 110 are cast as an integral structure in the factory; each fixing component 120 is used to connect one cylinder 200 to be installed; such as... Figure 2 As shown, the cylinder to be installed 200 includes a cylinder body 210 and a fixing lug 220 fixed to the outer side of the cylinder body 210; the cylinder body 210 is used to be sleeved on the outside of the fixed cylinder 121 and connected to the pre-embedded fixing member 122 through the fixing lug 220.

[0068] like Figure 6 As shown, the floor slab body 110 includes a first surface 110a (such as the upper surface or top surface) and a second surface 110b (such as the lower surface or bottom surface) along its thickness direction. A fixing cylinder 121 penetrates the floor slab body 110 along the first surface 110a to the second surface 110b. The first end of the fixing cylinder 121 protrudes from the first surface 110a, facilitating the positioning and installation of the cylinder 200 to be installed. The second end of the fixing cylinder 121 is flush with the second surface 110b. A pre-embedded fixing member 122 is embedded into the floor slab body 110 along the first surface 110a to the second surface 110b. The first end of the pre-embedded fixing member 122 protrudes from the first surface 110a, facilitating the fixing of the cylinder 200 to be installed. Figure 7 As shown, the cylinder to be installed 200 includes a cylinder body 210 and a fixed lug 220. The cylinder to be installed 200 is sleeved onto the fixed cylinder 121 through the cylinder body 210, and connected to the pre-embedded fastener 122 through the fixed lug 220, thus achieving the installation and fixation of the cylinder to be installed 200. The fixed lug 220 is fixed to the outer circumferential surface of the cylinder body 210, eliminating the need for on-site assembly. Simply sleeve the cylinder to be installed 200 onto the outside of the fixed cylinder 121 and connect the fixed lug 220 and the pre-embedded fastener 122. The connection method is simple, reliable, and easy to operate. Figure 8 As shown.

[0069] In one embodiment, the wall thickness of the cylinder to be installed 200 and the fixed cylinder 121 is the same. The cylinder to be installed 200 needs to be fitted onto the outside of the fixed cylinder 121; therefore, the inner diameter of the cylinder to be installed 200 should be two wall thicknesses larger than the inner diameter of the fixed cylinder 121.

[0070] The prefabricated Qishi slab assembly provided in this application embodiment is processed in a prefabrication plant, transported to the construction site by transportation equipment, and then assembled on-site into an integral floor structure. This realizes the prefabricated structure of the electronic factory building. Compared with the on-site construction and pouring of floor slabs in the prior art, it reduces on-site pouring construction, greatly simplifies the construction process, and enables the early delivery and early production of the electronic factory building.

[0071] To facilitate transportation, the prefabricated Qishi slab assembly provided in this application embodiment divides the traditional Qishi cylinder into two parts. The first part is the fixed cylinder 121, which is cast integrally with the floor slab body 110 in the prefabrication plant. The second part is the unassembled cylinder 200, which is assembled with the fixed cylinder 121 on the construction site. The fixed cylinder 121 protrudes from the first surface 110a of the floor slab body 110, facilitating the installation and positioning of the unassembled cylinder 200 without the need for on-site remeasurement and positioning.

[0072] Meanwhile, after the installation of the loading cylinder 200, since the loading cylinder 200 is connected to the pre-embedded fixing component 122, and both the pre-embedded fixing component 122 and the fixing cylinder 121 are pre-cast integral structures with the floor slab body 110, the loading cylinder 200 and the fixing cylinder 121 are relatively fixed. This connection method has a simple structure, is convenient to construct, and has high connection reliability. When pouring concrete at this time, the loading cylinder 200 will not float relative to the fixing cylinder 121 under the action of buoyancy, which can effectively prevent the upper loading cylinder 200 from floating or displacing, and avoid concrete leakage in the fixing cylinder 121 and the loading cylinder 200. In other words, when pouring concrete on the precast slab 100, the concrete slurry will not enter the ventilation hole 110c of the precast slab 100, ensuring that the cleanliness of the hole wall of the ventilation hole 110c meets the requirements of the cleanroom.

[0073] In some embodiments, such as Figure 6 As shown, the embedded fastener 122 and the fixing cylinder 121 are separate structures, which are cast into an integral structure with the floor slab body 110 in the prefabrication plant. The separate structure of the embedded fastener 122 and the fixing cylinder 121 makes it convenient to use different materials to manufacture the two structural components.

[0074] In some embodiments, such as Figure 7 As shown, the fixed lug 220 is fixed to the first end of the cylinder body 210, and the first end of the cylinder body 210 is used to fit over the outside of the fixed cylinder 121.

[0075] The fixing lug 220 is fixed to one end of the cylinder body 210 that is sleeved with the fixing cylinder 121, that is, the lower end of the cylinder body 210. This prevents the pre-embedded fixing part 122 from protruding too high from the first surface 110a, which would affect the handling and transportation of the precast slab 100. Furthermore, when the fixing lug 220 is connected to the pre-embedded fixing part 122, the connection position is close to the bottom of the cylinder to be installed 200, which improves the stress stability of the entire cylinder to be installed 200.

[0076] like Figure 8 As shown, the cylinder to be installed 200 is sleeved on the fixed cylinder 121, and the lower end face of the cylinder to be installed 200 contacts the first surface 110a of the floor slab body 110. In some embodiments, the cylinder to be installed 200 and the fixed cylinder 121 are sealed together to prevent concrete slurry from entering the interior of the fixed cylinder 121 and contaminating the ventilation hole 110c through the gap between the cylinder to be installed 200 and the fixed cylinder 121 during concrete pouring. In one embodiment, the cylinder to be installed 200 and the fixed cylinder 121 are interference-fitted. In another embodiment, the cylinder to be installed 200 and the fixed cylinder 121 are interference-fitted by an elastic sealing element.

[0077] In some embodiments, the fixing lug 220 and the cylinder body 210 are an integral structure. This integral design reduces the risk of loosening or detachment at connection points, which is common in split structures. This design makes the cylinder 200 more robust and better able to withstand the forces exerted on it by the embedded fixing member 122 during concrete pouring. Furthermore, the integral structure ensures a more direct and stable transmission of force from the fixing lug 220 to the cylinder body 210.

[0078] In some embodiments, the fixed lug 220 and the cylinder body 210 are made of the same material, which facilitates the processing and manufacturing of the cylinder 200 to be loaded.

[0079] In some embodiments, the fixing cylinder 121 and the loading cylinder 200 are made of epoxy resin. Epoxy resin is a thermosetting resin that is easy to cure, has strong adhesion, low shrinkage, and strong chemical and dimensional stability. It can prevent dust from rising from the walls of the ventilation holes 110c and affecting the cleanliness of the electronics factory for a long time. Since electronics factories have cleanliness requirements and control requirements for airborne particle size, placing the epoxy resin fixing cylinder 121 and loading cylinder 200 on the concrete surface can prevent dust from rising from the concrete surface.

[0080] In some embodiments, such as Figure 8 and Figure 9 As shown, the pre-embedded fastener 122 includes a pre-embedded part 1221, a pre-embedded plate 1222, and a connecting plate 1223; the pre-embedded plate 1222 includes a first surface 1222a and a second surface 1222b arranged opposite to each other along a first direction, the first surface 1222a is connected to the connecting plate 1223, and the second surface 1222b is connected to the pre-embedded part 1221; the first surface 1222a is flush with the first surface 110a; there is a first gap between the connecting plate 1223 and the outer wall surface of the fixing cylinder 121, and the first gap is greater than or equal to the wall thickness of the cylinder body 210.

[0081] In one embodiment, the embedded fastener 122 includes an embedded part 1221, an embedded plate 1222, and a connecting plate 1223. The embedded part 1221 is an anchor bar, preventing it from affecting the reinforcement arrangement inside the floor slab body 110. The embedded plate 1222 is a sheet material, such as a steel plate. Along the thickness direction, the embedded plate 1222 includes a first surface 1222a (as the upper surface) and a second surface 1222b (as the lower surface), with the first surface 1222a of the embedded plate 1222 flush with the first surface 110a of the floor slab body 110. That is, the entire embedded plate 1222 is embedded inside the floor slab body 110, improving the stability of the embedded plate 1222. The connecting plate 1223 is a sheet material, such as a steel plate. In one embodiment, as shown in the figure... Figure 10 As shown, the connecting plate 1223 is perpendicularly connected to the embedded plate 1222 at the middle position of the embedded plate 1222. (Refer to...) Figure 8 The plane of the connecting plate 1223 passes through the axis of the fixed cylinder 121, and a first gap exists between the connecting plate 1223 and the fixed cylinder 121 to facilitate the installation of the cylinder 200 to be installed. The size of the first gap is at least equal to the wall thickness of the cylinder body 210, ensuring that the cylinder body 210 can contact the surface of the floor slab body 110. In another embodiment, such as Figure 6 As shown, there is a second gap between the embedded plate 1222 and the fixed cylinder 121.

[0082] In one embodiment, such as Figure 8 As shown, the fixed lug 220 and the connecting plate 1223 are connected and fixed by a nail 230.

[0083] In some embodiments, such as Figure 3 As shown, a first stirrup group 111 and a second stirrup group 112 are provided in the floor slab body 110. The first stirrup group 111 includes a plurality of stirrups arranged at intervals along the second direction, i.e., the X direction, and the second stirrup group 112 includes a plurality of stirrups arranged at intervals along the third direction, i.e., the Y direction. All stirrups protrude from the first surface 110a. The first direction, the second direction, and the third direction are perpendicular to each other. The orthographic projections of the stirrups on the floor slab body 110 do not overlap with the orthographic projections of the ventilation holes 110c on the floor slab body 110. The orthographic projections of the stirrups on the floor slab body 110 do not overlap with the orthographic projections of the embedded plate 1222 on the floor slab body 110.

[0084] In one embodiment, such as Figure 3As shown, the floor slab body 110 is provided with multiple stirrups arranged sequentially at intervals along the X direction, i.e., the slab span direction. All the stirrups arranged sequentially along the X direction form a first stirrup group 111. The floor slab body 110 includes multiple first stirrup groups 111, and all the first stirrup groups 111 are arranged at intervals along the Y direction. The floor slab body 110 is also provided with multiple stirrups arranged sequentially at intervals along the Y direction, i.e., the slab width direction. All the stirrups arranged sequentially along the Y direction form a second stirrup group 112. The floor slab body 110 includes multiple second stirrup groups 112, and all the second stirrup groups 112 are arranged at intervals along the X direction. The fixing component 120 is located in the blank space formed by the intersection of multiple first stirrup groups 111 and multiple second stirrup groups 112 on the floor slab body 110.

[0085] In some embodiments, all stirrups protrude from the first surface 110a of the floor slab body 110 at the same height.

[0086] It should be noted that the first stirrup group 111, together with the floor slab body 110 and the reinforcing bars inside the floor slab body 110, forms a first hidden beam extending along the X direction, i.e., the span direction of the slab. The second stirrup group 112, together with the floor slab body 110 and the reinforcing bars inside the floor slab body 110, forms a second hidden beam extending along the Y direction, i.e., the width direction of the slab.

[0087] It should also be noted that none of the stirrups in the first stirrup group 111 and the second stirrup group 112 are connected to the web reinforcement on the side away from the floor slab body 110. In other words, no web reinforcement is provided above the first surface 110a of the floor slab body 110 so that the steel cage can be installed before on-site pouring.

[0088] In some embodiments, the fixing assembly 120 includes at least one set of pre-embedded fixing members 122 symmetrically arranged radially along the fixing cylinder 121; the arrangement direction of the symmetrically arranged pre-embedded fixing members 122 on both sides forms an angle with both the second direction and the third direction. Since the second direction is perpendicular to the third direction, the blank area formed by the first hidden beam and the second hidden beam is rectangular. To avoid interference between the pre-embedded fixing members 122 and the stirrups, the pre-embedded fixing members 122 are placed at the corners of the rectangular area.

[0089] In one embodiment, such as Figure 3 and Figure 4 As shown, the fixing assembly 120 includes two embedded fixing members 122 arranged symmetrically in the radial direction along the fixing cylinder 121; the arrangement direction of the two embedded fixing members 122 forms an angle with both the second direction and the third direction. That is, the two embedded fixing members 122 are respectively located at two opposite corners of the rectangular area.

[0090] In another embodiment, such as Figure 11As shown, the fixing assembly 120 includes two sets of pre-embedded fixing members 122 arranged symmetrically in the radial direction along the fixing cylinder 121; each set includes two pre-embedded fixing members 122 arranged symmetrically in the radial direction along the fixing cylinder 121. The arrangement direction of the two pre-embedded fixing members 122 in any set has an angle with both the second direction and the third direction. That is, the four pre-embedded fixing members 122 are located at the four corners of the rectangular area.

[0091] In some embodiments, the blank area formed by the first and second concealed beams is square. The arrangement direction of the symmetrically arranged pre-embedded fixing members 122 on both sides forms an angle of 45° with both the second and third directions.

[0092] In some embodiments, such as Figures 11-14 As shown, a cantilever 113 is provided on the side wall 110d of the floor slab body 110 near the second surface 110b. The cantilever 113 includes a third surface 113a and a fourth surface 113b arranged opposite to each other along a first direction. Along the first direction, the third surface 113a is located between the first surface 110a and the second surface 110b, and the fourth surface 113b is located on the same plane as the second surface 110b.

[0093] In one embodiment, such as Figure 11 and Figure 12 As shown, a cantilever 113 is provided on the side wall 110d of the floor slab body 110 near the second surface 110b. The cantilever 113 and the side wall 110d of the floor slab body 110 cooperate to form an L-shaped structure with the opening facing away from the floor slab body 110.

[0094] It should be noted that the notch 113 can be formed by cutting off a portion of the floor slab body 110. For example... Figure 11 As shown, L-shaped chamfers are provided around the perimeter of the floor slab body 110, and the removed portion is the side of the floor slab body 110 closest to the first surface 110a, forming cantilever ears 113 on the slab. When multiple precast slabs 100 are spliced ​​to form a floor structure, the joint between two adjacent precast slabs 100 is formed by splicing two cantilever ears 113. The concrete of the precast slabs 100 on both sides of the joint is exposed. Due to the small size of the joint (e.g., 20mm), the concrete surface on both sides of the joint cannot be coated with epoxy; and conventional joint filling technology is prone to cracking during use. Therefore, dust-generating points are easily formed at the joint of the precast slabs 100, which will affect the cleanliness of the electronic factory during use.

[0095] In some embodiments, the lug 113 further includes a fifth surface 113c; the fifth surface 113c is connected to the third surface 113a and is also used to connect to the fourth surface 113b; the lug 113 is provided with an L-shaped edge banding 114; the edge banding 114 covers the fifth surface 113c and a portion of the lug 113 on the side away from the third surface 113a; the edge banding 114 does not protrude from the third surface 113a.

[0096] To address the issue of particulate matter released from the seams of the precast slab 100, affecting the cleanliness of the production environment, the precast slab 100 provided in this embodiment of the application has an L-shaped edge banding 114 installed around the outer side of the notches 113 around the precast slab 100 during processing. Figure 14 As shown. The height of the L-shaped edge banding 114 is the same as the thickness of the cantilever 113 of the precast slab 100, the lower side is flush with the lower surface of the precast slab 100, and the top surface of the L-shaped edge banding 114 is flush with the top surface of the concrete cantilever 113 of the precast slab 100.

[0097] In one embodiment, such as Figure 13 and Figure 14 As shown, the cantilever 113 also includes a fifth surface 113c, a sixth surface 113d, and a seventh surface 113e connected in sequence; the side of the fifth surface 113c away from the sixth surface 113d is connected to the third surface 113a, and the side of the seventh surface 113e away from the sixth surface 113d is connected to the fourth surface 113b; wherein: the distance between the sixth surface 113d and the third surface 113a is less than the distance between the fourth surface 113b and the third surface 113a, and the distance between the seventh surface 113e and the side wall of the floor slab body 110 is less than the distance between the fifth surface 113c and the side wall of the floor slab body 110; the cantilever 113 is provided with an edge banding 114; the edge banding 114 covers the fifth surface 113c, the sixth surface 113d, and the seventh surface 113e; the edge banding 114 does not protrude from the third surface 113a, and the side of the edge banding 114 away from the sixth surface 113d is flush with the fourth surface 113b.

[0098] In one embodiment, the length of the L-shaped edge banding 114 on the side facing away from the third surface 113a, i.e., covering the sixth surface 113d and the seventh surface 113e, ranges from 30 to 50 mm. Here, the length can be understood as the dimension along the arrangement direction of the fifth surface 113c and the seventh surface 113e.

[0099] Secondly, embodiments of this application also provide a floor structure, including multiple precast slab groups as described in any of the first aspects; a cast-in-place section is formed at the joint of two adjacent precast slabs 100; a superimposed cast-in-place layer is laid on the precast slab 100 and connected to the cast-in-place section between the slabs.

[0100] In one embodiment, the floor structure includes precast frame columns, support components, and multiple precast slab assemblies. The support components are installed on the precast frame columns to support the precast slabs 100; a cast-in-place section is formed at the joint of two adjacent precast slabs 100; a superimposed cast-in-place layer is laid on the precast slabs 100 and connected to the cast-in-place section between the slabs; a cylinder 200 is provided in the superimposed cast-in-place layer, and the cylinder 200 is sleeved on the outside of the fixing cylinder 121 in the precast slabs 100 and connected to the embedded fixing member 122.

[0101] Thirdly, embodiments of this application also provide a floor structure, including multiple precast slab assemblies as provided in some embodiments of the first aspect; a cast-in-place section is formed at the joint of two adjacent precast slabs 100; a superimposed cast-in-place layer is laid on the precast slab 100 and connected to the cast-in-place section between the slabs. A joint sealing strip 400 is snapped onto the side of the joint of two adjacent precast slabs 100 away from the cast-in-place section between the slabs, and the joint sealing strip 400 contacts the cantilever 113 surface of the two adjacent precast slabs 100 and at least covers the joint 101 formed by the two adjacent precast slabs 100.

[0102] like Figure 15 As shown, multiple precast slabs 100 are spliced ​​together to form a floor structure. The joint 101 between two adjacent precast slabs 100 is formed by splicing two cantilever lugs 113. The concrete of the precast slabs 100 on both sides of the joint 101 is exposed. Due to the small size of the joint 101, the concrete surface on both sides of the joint 101 cannot be coated with epoxy. Conventional joint filling techniques are prone to cracking during use. Therefore, dust-generating points are easily formed at the joint 101 of the precast slabs 100, which will affect the cleanliness of the electronic factory during use.

[0103] In this embodiment, a sealing strip 400 is added to the bottom of the joint 101 to seal the joint 101 between the precast slabs 100, preventing the concrete surfaces on both sides of the joint 101 from being exposed, and at the same time preventing the cast-in-place concrete of the upper slab section from overflowing from the joint 101.

[0104] In one embodiment, such as Figure 15 As shown, the joint sealing strip 400 includes a buckle, which is snapped into the joint 101 and inserted into the concrete surfaces on both sides of the joint 101 to achieve the snap-fit ​​of the joint sealing strip 400.

[0105] Fourthly, embodiments of this application also provide a floor structure, including multiple precast slab assemblies as provided in some embodiments of the first aspect; a cast-in-place section is formed at the joint of two adjacent precast slabs 100; a superimposed cast-in-place layer is laid on the precast slab 100 and connected to the cast-in-place section between the slabs;

[0106] The cast-in-place section between slabs includes a grout sealing strip 300, which contacts the cantilevered surfaces of two adjacent precast slabs 100 and at least covers the joint formed by the two adjacent precast slabs 100.

[0107] like Figure 16 As shown, during the processing of the precast slab 100, a smooth L-shaped edge sealing piece 114 is set around the outside of the cantilever lugs 113 to prevent exposed concrete on both sides of the joint 101 after installation. When pouring the cast-in-place section between slabs, a grout-sealing strip 300 is added to the top of the joint to prevent grout leakage from the cast-in-place concrete layer of the upper cast-in-place section between slabs.

[0108] Figure 17 The image shows the area where the grout sealing strip 300 is installed. It is understood that the grout sealing strip 400 can also be referenced. Figure 17 The grout-blocking strip 300 is installed in the area shown in the figure.

[0109] It should be noted that the materials for L-shaped edge sealing parts 114, grout sealing strips 300, and joint sealing strips 400 must be smooth and chemically stable.

[0110] Fifthly, embodiments of this application also provide a floor structure, characterized in that it includes multiple precast slab assemblies as provided in some embodiments of the first aspect; a cast-in-place section is formed at the joint of two adjacent precast slabs 100; and an overlay cast-in-place layer is laid on the precast slab 100 and connected to the cast-in-place section between the slabs.

[0111] The superimposed cast-in-place layer on the slab includes a first integrated steel cage 500 and a second integrated steel cage 600; the first integrated steel cage 500 extends along a second direction and is connected to a first stirrup group 111, and the second integrated steel cage 600 extends along a third direction and is connected to a second stirrup group 112.

[0112] The first integrated steel cage 500 and / or the second integrated steel cage 600 include high-limb stirrups and low-limb stirrups arranged alternately along their extension direction, with one high-limb stirrup connected to one stirrup and one low-limb stirrup connected to one stirrup.

[0113] The low-limb stirrups abut against the floor slab body 110; the high-limb stirrups have a gap with the floor slab body 110.

[0114] like Figure 18As shown, the first integrated steel cage 500 includes alternating high-limb stirrups 510 and low-limb stirrups 520 arranged in the second direction, i.e., the slab span direction. Along the Z-direction, i.e., the height direction of the first integrated steel cage 500, the tops of all high-limb stirrups 510 and all low-limb stirrups 520 are flush, and the bottoms of the high-limb stirrups 510 are higher than the bottoms of the low-limb stirrups 520. Alternatively, it can be understood that along the Z-direction, the tops of the high-limb stirrups 510 and low-limb stirrups 520 are flush, and the length of the low-limb stirrups 520 is greater than the length of the high-limb stirrups 510.

[0115] The first integrated steel cage 500 also includes longitudinal bars 530, web bars 540 and tie bars 550. The longitudinal bars 530 are connected to the top of all high-limb stirrups 510 and all low-limb stirrups 520. The web bars 540 are connected to the middle of all high-limb stirrups 510 and all low-limb stirrups 520. One tie bar 550 is connected to two opposite web bars 540 and the web bars 540 are connected to either the high-limb stirrups 510 or the low-limb stirrups 520.

[0116] like Figure 19 As shown, the second integrated steel cage 600 includes alternating high-limb stirrups 610 and low-limb stirrups 620 in the third direction, i.e., the width-span direction of the slab. Along the Z-direction, i.e., the height direction of the second integrated steel cage 600, the tops of all high-limb stirrups 610 and all low-limb stirrups 620 are flush, and the bottoms of the high-limb stirrups 610 are higher than the bottoms of the low-limb stirrups 620. Alternatively, it can be understood that along the Z-direction, the tops of the high-limb stirrups 610 and low-limb stirrups 620 are flush, and the length of the low-limb stirrups 620 is greater than the length of the high-limb stirrups 610.

[0117] The second integrated steel cage 600 also includes longitudinal bars 630, which are connected to the top of all high-limb stirrups 610 and all low-limb stirrups 620.

[0118] like Figure 20 As shown, the concealed beam within the precast slab 100 includes stirrups 1111, web reinforcement 1112, and bottom longitudinal reinforcement 1113. Both the web reinforcement 1112 and the longitudinal reinforcement 1113 are located inside the slab body 110 and do not protrude from its surface. The stirrups 1111 extend a certain height above the top surface of the slab body 110, and this height is greater than the height of the fixing cylinder 121 protruding from the top surface of the slab body 110. These stirrups are used for positioning and fixing the reinforcement of the concealed beam within the upper cast-in-place layer (i.e., the overlapping cast-in-place layer on the slab), and also protect the fixing cylinder 121.

[0119] like Figure 21 and Figure 22 As shown, the stirrups of the overlapping cast-in-place hidden beams on the slab are arranged with alternating high and low stirrups. The top of the high-limb stirrups is flush with the top of the stirrups that extend above the first surface 110a of the precast slab body 110 within the slab 100, and is used for tying and positioning the web reinforcement at that location, such as... Figure 23As shown. The low-leg stirrups fall directly onto the top surface of the floor slab body 110, i.e., the first surface 110a. That is, the low-leg stirrups are in contact with the top surface of the floor slab body 110, as... Figure 24 As shown, this facilitates accurate positioning of the reinforcement bars of the cast-in-place hidden beams along the 100mm thickness direction of the precast slab.

[0120] When tying the superimposed cast-in-place reinforcement on the upper slab on site, the longitudinal reinforcement above the slab body in the precast slab conflicts with the stirrups of the cast-in-place layer, affecting the tying and fixing of the stirrups of the cast-in-place layer. It is necessary to break the stirrups open and put them on both sides of the web reinforcement before tying and fixing them, which is difficult to carry out and not easy to operate.

[0121] The floor structure provided in this application adjusts the reinforcement arrangement of the precast slab by removing the longitudinal stirrups above the slab body, retaining the stirrups protruding from the upper surface of the slab body (e.g., 50mm high), and adjusting the arrangement of the stirrup sleeves in the cast-in-place layer. A high-low interval stirrup arrangement is adopted, with one stirrup falling directly to the top surface of the precast slab, and the adjacent stirrup flush with the stirrups protruding from the upper surface of the slab body within the precast slab. The longitudinal stirrups are then inserted and tied for fixation. This high-low interval stirrup design, on the one hand, prevents the stirrup sleeves from being deformed by being stepped on during construction by supporting them on the precast slab, and on the other hand, facilitates the fixation of the inserted longitudinal stirrups. The high-low interval stirrup design also facilitates the installation and fixation of the cast-in-place reinforcement, and the use of integrated reinforcement cages improves construction efficiency.

[0122] In some embodiments, the superimposed cast-in-place layer on the slab further includes a first rear-inserted reinforcing bar 700, a second rear-inserted reinforcing bar 800 and a third rear-inserted reinforcing bar 900; the first rear-inserted reinforcing bar 700 is used to insert into the first integrated reinforcing bar cage 500 and connect with the first stirrup group 111 after the first integrated reinforcing bar cage 500 is fixed to the first stirrup group 111.

[0123] The second rear insert bar 800 is used to insert into the interior of the second integrated steel cage 600 and connect with the second stirrup group 112 after the second integrated steel cage 600 is fixed to the second stirrup group 112.

[0124] The third rear insert bar 900 is used to insert into the second integrated steel cage 600 and connect with the second integrated steel cage 600 after the second integrated steel cage 600 is fixed to the second stirrup group 112.

[0125] The distance between the third rear reinforcing bar 900 and the floor slab body 110 is greater than the distance between the second rear reinforcing bar 800 and the floor slab body 110.

[0126] The composite cast-in-place layer on the slab also includes a first rear-inserted reinforcing bar 700, a second rear-inserted reinforcing bar 800, and a third rear-inserted reinforcing bar 900. When arranging the hidden beam reinforcement of the composite cast-in-place layer on the slab, the hidden beam reinforcement in both directions (span and width) of the composite cast-in-place layer is assembled into integrated reinforcing cages, namely the first integrated reinforcing cage 500 and the second integrated reinforcing cage 600, and then the two integrated reinforcing cages are installed and fixed as a whole. For example... Figure 21 As shown, the first rear-inserted reinforcing bar 700 is inserted into the first integrated reinforcing cage 500 after the first integrated reinforcing cage 500 is fixed to the first stirrup group 111, and is then tied and fixed on-site to the first stirrup group 111. For example... Figure 22 As shown, the second rear insert waist bar 800 and the third rear insert waist bar 900 are inserted into the second integrated steel cage 600 after the second stirrup group 112 is fixed to the second integrated steel cage 600. The second rear insert waist bar 800 is tied to the second stirrup group 112 on site, and the third rear insert waist bar 900 is tied to the second integrated steel cage 600 on site. After tying, tie bar 910 is tied.

[0127] In one embodiment, the specific construction steps for the hidden beam reinforcement of the superimposed cast-in-place layer on the slab are as follows:

[0128] S1. Place the assembled first integrated steel reinforcement cage 500, extending along the span direction of the precast slab 100, at the corresponding position on the precast slab 100 and secure it to the stirrups of the precast slab 100. The first integrated steel reinforcement cage 500 along the span direction of the precast slab 100 is as follows: Figure 18 As shown, it includes high-limb stirrups 510, low-limb stirrups 520, upper longitudinal bars 530, upper row of waist bars 540 and tie bars 550, but does not include lower row of waist bars.

[0129] S2. Insert the first rear reinforcing bar 700, i.e. the lower row of reinforcing bars, and tie it together with the first integrated steel cage 500 and the stirrups of the precast slab 100.

[0130] S3. Place the assembled second integrated steel reinforcement cage 600, extending along the width of the precast slab 100, at the corresponding position on the precast slab 100 and secure it to the stirrups of the precast slab 100. The second integrated steel reinforcement cage 600 along the width of the precast slab 100 is as follows: Figure 19 As shown, it includes a high-limb stirrup 610, a low-limb stirrup 620, and an upper longitudinal bar 630, but does not include waist bars or tie bars.

[0131] S4. Insert the second rear reinforcing bar 800, i.e. the lower row of reinforcing bars, and tie it together with the second integrated steel cage 600 and the stirrup sleeve of the precast slab 100.

[0132] S5. Insert the third rear waist tendon 900, i.e. the upper waist tendon and the corresponding rear binding tendon 910, and tie and fix them.

[0133] Complete the installation of the reinforcing bars for the hidden beams of the composite cast-in-place layer on the slab.

[0134] The floor structure provided in this application embodiment can effectively reduce the amount of on-site rebar binding. Moreover, the rebar binding area is above the precast slab 100 and is shallow, which makes it easy for workers to operate, greatly reduces the difficulty of rebar binding, and improves the overall construction efficiency on site.

[0135] In one embodiment, the on-site construction steps of the floor structure are as follows:

[0136] S1. Arrange precast slabs 100; the precast slab 100 includes fixing components 120 and L-shaped edge banding components 114;

[0137] S2. Install and fix the cylinder 200 to be installed on the precast slab 100;

[0138] S3, the first integrated steel cage 500 in the cross direction of the installation plate;

[0139] S4. Insert the first rear reinforcing bar 700 in the cross direction of the plate and tie it in place;

[0140] S5, Install the second integrated steel cage 600 in the width direction of the plate;

[0141] S6. Insert the second rear waist reinforcement 800 in the width direction of the plate and tie it in place;

[0142] S7. Insert the third rear waist reinforcement 900 in the width direction of the plate and tie it with the tie rod for fixation;

[0143] S8. Install and fix grout sealing strips 300 at the joints of the precast slabs 100;

[0144] S9. Pour the cast-in-place concrete layer.

[0145] Obviously, those skilled in the art can make various modifications and variations to the embodiments of this application without departing from the spirit and scope of this application. Therefore, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application also intends to include these modifications and variations.

Claims

1. A floor structure, characterized in that, Includes prefabricated girders; the prefabricated girders include: prefabricated slabs and cylinders to be installed; The precast slab includes a floor slab body and multiple fixing components; The floor slab body includes a first surface and a second surface disposed opposite to each other along a first direction; The fixing assembly includes a fixing cylinder and a pre-embedded fixing component; the fixing cylinder penetrates the floor slab body along the first direction to form a ventilation hole; both the pre-embedded fixing component and the fixing cylinder protrude from the first surface; the fixing assembly and the floor slab body are cast as an integral structure in the factory; each fixing assembly is used to connect one of the cylinders to be installed. The cylinder to be installed includes a cylinder body and a fixed lug fixed to the outer side of the cylinder body; the cylinder body is used to be sleeved on the outside of the fixed cylinder and connected to the pre-embedded fixing component through the fixed lug; The side wall of the floor slab body is provided with a cantilever on the side near the second surface. The cantilever includes a third surface and a fourth surface arranged opposite to each other along the first direction. Along the first direction, the third surface is located between the first surface and the second surface, and the fourth surface is located on the same plane as the second surface. The ear also includes a fifth surface; the fifth surface is connected to the third surface and is also used to connect to the fourth surface; the ear is provided with an L-shaped edge banding; the edge banding covers the fifth surface and a portion of the ear facing away from the third surface; the edge banding does not protrude from the third surface; The joint between two adjacent precast slabs forms a cast-in-place section between the slabs; a superimposed cast-in-place layer is laid on the precast slab and connected to the cast-in-place section between the slabs; the cast-in-place section between the slabs includes a grout sealing strip, which contacts the cantilevered surfaces of the two adjacent precast slabs and at least covers the joint formed by the two adjacent precast slabs.

2. A floor structure, characterized in that, Includes prefabricated girders; the prefabricated girders include: prefabricated slabs and cylinders to be installed; The precast slab includes a floor slab body and multiple fixing components; The floor slab body includes a first surface and a second surface disposed opposite to each other along a first direction; The fixing assembly includes a fixing cylinder and a pre-embedded fixing component; the fixing cylinder penetrates the floor slab body along the first direction to form a ventilation hole; both the pre-embedded fixing component and the fixing cylinder protrude from the first surface; the fixing assembly and the floor slab body are cast as an integral structure in the factory; each fixing assembly is used to connect one of the cylinders to be installed. The cylinder to be installed includes a cylinder body and a fixed lug fixed to the outer side of the cylinder body; the cylinder body is used to be sleeved on the outside of the fixed cylinder and connected to the pre-embedded fixing component through the fixed lug; The side wall of the floor slab body is provided with a cantilever on the side near the second surface. The cantilever includes a third surface and a fourth surface arranged opposite to each other along the first direction. Along the first direction, the third surface is located between the first surface and the second surface, and the fourth surface is located on the same plane as the second surface. The joint between two adjacent precast slabs forms a cast-in-place section between the slabs; a superimposed cast-in-place layer is laid on the precast slab and connected to the cast-in-place section between the slabs; a sealing strip is snapped onto the side of the joint between two adjacent precast slabs away from the cast-in-place section between the slabs, and the sealing strip contacts the cantilevered surface of the two adjacent precast slabs and at least covers the joint formed by the two adjacent precast slabs.

3. The floor structure according to claim 1 or 2, characterized in that, The embedded fastener includes an embedded part, an embedded plate, and a connecting plate; the embedded plate includes a first surface and a second surface arranged opposite to each other along the first direction, the first surface is connected to the connecting plate, and the second surface is connected to the embedded part; the first surface is flush with the first surface. There is a first gap between the connecting plate and the outer wall of the fixed cylinder, and the first gap is greater than or equal to the wall thickness of the cylinder body.

4. The floor structure according to claim 3, characterized in that, The floor slab body is provided with a first stirrup group and a second stirrup group. The first stirrup group includes a plurality of stirrups arranged at intervals along a second direction, and the second stirrup group includes a plurality of stirrups arranged at intervals along a third direction. All the stirrups protrude from the first surface. The orthographic projections of the stirrups on the floor slab body do not overlap with the orthographic projections of the ventilation holes on the floor slab body; The orthographic projections of the stirrups on the floor slab body do not overlap with the orthographic projections of the embedded plates on the floor slab body.

5. The floor structure according to claim 4, characterized in that, The fixing assembly includes at least one set of pre-embedded fixing members arranged symmetrically along the radial direction of the fixing cylinder; the arrangement direction of the pre-embedded fixing members on both sides arranged symmetrically has an angle with the second direction and the third direction.

6. The floor structure according to claim 1 or 2, characterized in that, The fixed lug is fixed to the first end of the cylinder body, and the first end of the cylinder body is used to fit over the outside of the fixed cylinder.

7. The floor structure according to claim 1 or 2, characterized in that, The fixed hook and the cylinder body are an integral structure.

8. The floor structure according to claim 4, characterized in that, The superimposed cast-in-place layer on the slab includes a first integrated steel cage and a second integrated steel cage; the first integrated steel cage extends along the second direction and is connected to the first stirrup group, and the second integrated steel cage extends along the third direction and is connected to the second stirrup group. The first integrated steel cage and / or the second integrated steel cage include high-limb stirrups and low-limb stirrups arranged alternately along their extension direction, with one high-limb stirrup connected to one stirrup and one low-limb stirrup connected to one stirrup. The lower stirrup abuts against the floor slab body; the upper stirrup has a gap with the floor slab body.

9. The floor structure according to claim 8, characterized in that, The superimposed cast-in-place layer on the slab also includes a first rear-inserted waist bar, a second rear-inserted waist bar and a third rear-inserted waist bar; the first rear-inserted waist bar is used to insert into the first integrated steel cage and connect with the first stirrup group after the first integrated steel cage is fixed to the first stirrup group. The second rear insert bar is used to insert into the interior of the second integrated steel cage and connect with the second stirrup group after the second integrated steel cage is fixed to the second stirrup group; The third rear insert waist bar is used to be inserted into the second integrated steel cage and connected to the second integrated steel cage after the second integrated steel cage is fixed to the second stirrup group. The distance between the third rear insert reinforcement and the floor slab body is greater than the distance between the second rear insert reinforcement and the floor slab body.

Images