A prefabricated floor structure suitable for large spans

Abstract

The present application discloses a prefabricated floor structure suitable for large spans, including a prefabricated frame and prefabricated Qishi panels. The prefabricated frame includes an external frame and an internal frame; the external frame includes a plurality of fourth prefabricated beams connected end to end; the internal frame includes a plurality of first prefabricated beams, a plurality of second prefabricated beams, and a plurality of third prefabricated beams, each third prefabricated beam being connected between two fourth prefabricated beams; each first prefabricated beam being connected between two third prefabricated beams; the first end of each second prefabricated beam being connected to the side of the third prefabricated beam facing away from the first prefabricated beam, and the second end being connected to the fourth prefabricated beam; the internal frame divides the space enclosed by the external frame into a plurality of beam grids; the prefabricated Qishi panels are installed in the beam grids. The prefabricated floor structure realizes the construction process without formwork or support, reduces the amount of on-site reinforcement work, and ensures the quality of the reinforcement work. The present application meets the requirements of anti-micro-vibration and high cleanliness, thereby increasing the construction speed, improving the construction quality, and meeting the requirements of rapid construction and rapid production of electronic factories.

Description

Technical Field

[0001] The present application relates to the technical field of clean workshop construction, and in particular to a prefabricated floor structure suitable for large spans. Background Art

[0002] High-precision electronics factories require a dust-free and clean operating environment for equipment, so strict requirements are placed on floor vibration and air cleanliness. For cleanrooms with column spans no greater than 4.8m, the core process floor generally uses a thick plate-column structure formed by Cheeseboard. However, for process floor floors with column spans exceeding 6m, for economic reasons, Cheeseboard floors of equal thickness are generally not used. Instead, waffle panels with bidirectional grid beams are used, such as Figure 1 and Figure 2 shown.

[0003] Currently, waffle slab floor is constructed with cast-in-place technology. First, the site needs to support the formwork, such as building a full house scaffolding. The cast-in-place mold is customized and expensive. Second, the cast-in-place construction period is long and the support frame is slow to move out, which affects the subsequent clean room decoration and mechanical and electrical pipeline installation process. Most importantly, there are difficulties in tying steel bars on site: Figure 1 and Figure 2 As shown in the figure, the dense-ribbed L-beams of the waffle slab floor are narrow, deep and dense, such as 200-350mm wide, 900-1200mm deep, 1200mm apart and crossed in both directions, which makes the reinforcement construction difficult and the workers' arm operation depth is limited, making it difficult to control the quality of the reinforcement project. Summary of the Invention

[0004] The present application discloses a prefabricated floor structure suitable for large spans, which is used to solve the problem of complex and difficult construction when the existing large-span process floor adopts a cast-in-place solution.

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

[0006] A prefabricated floor structure suitable for large spans, comprising:

[0007] A prefabricated frame comprising an outer frame and an inner frame; the outer frame comprising a plurality of fourth prefabricated beams connected end to end; the inner frame comprising a plurality of first prefabricated beams, a plurality of second prefabricated beams, and a plurality of third prefabricated beams, each of the third prefabricated beams being connected between two of the fourth prefabricated beams; each of the first prefabricated beams being connected between two of the third prefabricated beams; each of the second prefabricated beams having a first end connected to a side of the third prefabricated beam facing away from the first prefabricated beam and a second end connected to the fourth prefabricated beam; the inner frame dividing the space enclosed by the outer frame into a plurality of beam grids;

[0008] Prefabricated Qishi panels are installed in the beam grids.

[0009] The prefabricated floor structure provided in the embodiment of the present application is suitable for a large-span floor system. Prefabricated beams and prefabricated odd-shaped panels are processed in a prefabricated factory and then transported to the construction site via transportation equipment. The prefabricated frame and prefabricated odd-shaped panels are then assembled and hoisted at the construction site. For example, at the construction site, the fourth prefabricated beam is first hoisted to a corresponding position, such as being placed on a prefabricated column and connected end to end to form an outer frame of the prefabricated frame. The first prefabricated beam, the second prefabricated beam, and the third prefabricated beam are then assembled into an inner frame of the prefabricated frame. The inner frame is hoisted at a corresponding position and connected to the outer frame to form a prefabricated frame using a hoisting device. The prefabricated odd-shaped panels are then hoisted at a corresponding position, i.e., within the beam grid of the prefabricated frame, and finally assembled into an integral prefabricated floor structure, thereby achieving prefabricated construction of a large-span process layer floor while meeting the requirements of anti-micro-vibration and high cleanliness. Compared with the on-site construction and casting of floor slabs in the prior art, the embodiment of the present application saves the process of laying the support frame and platform formwork, reduces the on-site steel bar binding construction, and saves the time of dismantling the support frame, greatly simplifies the construction process, and can achieve early delivery of the electronic factory and early production.

[0010] Specifically, the prefabricated frame includes a plurality of prefabricated beams, and the plurality of prefabricated beams include a plurality of first prefabricated beams, a plurality of second prefabricated beams, a plurality of third prefabricated beams and a plurality of fourth prefabricated beams. The plurality of fourth prefabricated beams are connected end to end to form the outer frame of the prefabricated frame, and the plurality of first prefabricated beams, the plurality of second prefabricated beams and the plurality of third prefabricated beams are connected to form the inner frame of the prefabricated frame, and the inner frame divides the space enclosed by the outer frame into a plurality of beam grids. In the prefabricated floor structure provided in the embodiment of the present application, the prefabricated Qishi board is supported by the prefabricated frame, so that the construction process is free of formwork and support. By manufacturing prefabricated beams in the prefabricated factory, the amount of on-site steel reinforcement work is reduced, and the on-site steel reinforcement is tied at a surface that is easy for workers to operate, thereby ensuring the quality of the steel reinforcement work. Through the combination of the prefabricated frame and the prefabricated Qishi board, the present application meets the requirements of anti-micro-vibration and high cleanliness, thereby increasing the construction speed, improving the construction quality, and realizing the needs of rapid construction and rapid production of electronic factories.

[0011] In some embodiments, each of the first precast beam, the second precast beam, the third precast beam, and the fourth precast beam comprises: a precast shell and a first stirrup, wherein the precast shell and the first stirrup are cast with concrete in a factory to form an integrated structure; wherein:

[0012] The prefabricated shell includes a U-shaped plate, and the U-shaped plate includes a bottom plate and side plates connected to both sides of the bottom plate; the height of the first stirrup away from the bottom plate is higher than the height of the side plates.

[0013] In some embodiments, in the first precast beam, the precast shell further includes a first end plate and a second end plate, and the first end plate and the second end plate are respectively connected to opposite ends of the U-shaped plate.

[0014] In some embodiments, in the second precast beam, the precast shell further includes a third end plate connected to one end of the U-shaped plate; and the end of the second precast beam away from the third end plate has a cast-in-place section.

[0015] In some embodiments, each of the third precast beam and the fourth precast beam has cast-in-place sections at opposite ends.

[0016] In some embodiments, the precast shell of each of the third precast beam and the fourth precast beam further includes at least one stiffening rib group connected to the inside of the U-shaped plate, and the stiffening rib group is located at a connection node where the precast beam is connected to other precast beams.

[0017] In some embodiments, in each of the third precast beam and the fourth precast beam, each of the stiffening rib groups includes a first stiffening rib and a second stiffening rib, the first stiffening rib is coplanar with one side plate of the other precast beam connected to the precast beam, and the second stiffening rib is coplanar with the other side plate of the other precast beam connected to the precast beam.

[0018] In some embodiments, each of the stiffening rib groups further includes at least one third stiffening rib located between the first stiffening rib and the second stiffening rib.

[0019] In some embodiments, in each of the first precast beam, the second precast beam, the third precast beam and the fourth precast beam, a support member for supporting the precast Chi-Schmidt plate is provided on the outer side of the side plate;

[0020] And / or, a steel corbel for supporting the second precast beam and / or the third precast beam is provided on the outer side of the side plate of the fourth precast beam.

[0021] In some embodiments, each of the prefabricated Qishi slabs includes a floor slab body and a plurality of second stirrups protruding from the floor slab body; and each of the prefabricated Qishi slabs is paved with a laminated cast-in-situ layer on the floor; the laminated cast-in-situ layer on the floor slab includes a first steel cage, the first steel cage includes first high-limb stirrups and first low-limb stirrups alternately arranged along its extension direction, one first high-limb stirrup is correspondingly connected to one second stirrup, and one first low-limb stirrup is correspondingly connected to one second stirrup; the first low-limb stirrups abut against the floor slab body; and a gap is formed between the first high-limb stirrups and the floor slab body;

[0022] And / or, each of the first precast beam, the second precast beam, the third precast beam and the fourth precast beam is provided with a beam-mounted cast-in-situ layer; wherein:

[0023] The superimposed cast-in-situ layer on the beam includes a steel cage, which includes high-limb stirrups and low-limb stirrups alternately arranged along its extension direction, one high-limb stirrup is connected to one first stirrup, and one low-limb stirrup is connected to another first stirrup; the low-limb stirrups are in contact with the concrete poured in the prefabricated shell; and there is a gap between the high-limb stirrups and the concrete poured in the prefabricated shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural diagram of a waffle plate floor;

[0025] Figure 2 for Figure 1 Cross-sectional view along AA;

[0026] Figure 3 A schematic structural diagram of a prefabricated floor structure suitable for large spans provided in an embodiment of the present application;

[0027] Figure 4 A schematic structural diagram of a prefabricated frame in a prefabricated floor structure suitable for large spans provided in an embodiment of the present application;

[0028] Figure 5-Figure 7 This is a schematic diagram of the assembly of prefabricated beams in an embodiment of the present application;

[0029] Figure 8 This is a cross-sectional view of a prefabricated beam in an embodiment of the present application taken along a direction perpendicular to its length;

[0030] Figure 9 This is a schematic structural diagram of the first prefabricated beam in an embodiment of the present application;

[0031] Figure 10 This is a schematic structural diagram of the second prefabricated beam in an embodiment of the present application;

[0032] Figure 11 This is a schematic structural diagram of the third prefabricated beam in an embodiment of the present application;

[0033] Figure 12 This is a schematic structural diagram of the fourth prefabricated beam in an embodiment of the present application;

[0034] Figure 13 This is a schematic diagram of the connection between the third precast beam and the first precast beam or the second precast beam in the embodiment of the present application;

[0035] Figure 14 This is a schematic diagram of the connection between the fourth precast beam and the second precast beam or the third precast beam in an embodiment of the present application;

[0036] Figure 15 This is a schematic diagram of the assembly of the prefabricated beam and the prefabricated Qishi plate in the embodiment of the present application;

[0037] Figure 16 This is a cross-sectional view of the assembly of the prefabricated beam and the prefabricated Qishi plate in the embodiment of the present application;

[0038] Figure 17 This is a structural diagram of the prefabricated Qishi board in the embodiment of the present application;

[0039] Figure 18 This is a cross-sectional view of a prefabricated floor structure in an embodiment of the present application;

[0040] Figure 19 This is a schematic structural diagram of the first steel cage in the slab-mounted cast-in-situ layer in an embodiment of the present application;

[0041] Figure 20 This is a schematic structural diagram of the second steel cage in the superimposed cast-in-situ layer on the beam in an embodiment of the present application;

[0042] Figure 21 This is a schematic structural diagram of the third steel cage in the superimposed cast-in-situ layer on the beam in an embodiment of the present application;

[0043] Figure 22-26 This is a schematic diagram of the assembly process of the prefabricated floor structure in the embodiment of the present application;

[0044] Icons: L-beam grid; 100-precast frame; 200-precast Chishi slab; 300-precast column; 400-laminated cast-in-situ layer on slab; 500-laminated cast-in-situ layer on beam; 401-first reinforcement cage; 501-second reinforcement cage; 502-third reinforcement cage; 101-first precast beam; 102-second precast beam; 103-third precast beam; 104-fourth precast beam; 105-support; 110-precast shell; 120-first stirrup; 130-concrete; 111-U-shaped slab; 112-first end plate; 113-second end plate; 114-third end plate; 115-cast-in-place section; 116-stiffening rib group; 1041-steel corbel; 1111-bottom plate; 1112-side plate; 1161-first stiffening rib; 1162-second stiffening rib; 1163-third stiffening rib; 210-slab body; 220-second stirrup; 230-Chi's tube; 410-first high-leg stirrup; 420-first low-leg stirrup; 510-second high-leg stirrup; 520-second low-leg stirrup. DETAILED DESCRIPTION

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. Among them, in the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in the text is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, "multiple" refers to two or more than two.

[0046] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to imply or suggest relative importance or implicitly indicate the number of the technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of this application, unless otherwise specified, "plurality" means two or more.

[0047] like Figures 3 and 4 As shown, the embodiment of the present application provides a prefabricated floor structure suitable for large spans, comprising:

[0048] The prefabricated frame 100 includes an outer frame and an inner frame; the outer frame includes a plurality of fourth prefabricated beams 104 connected end to end; the inner frame includes a plurality of first prefabricated beams 101, a plurality of second prefabricated beams 102, and a plurality of third prefabricated beams 103, each third prefabricated beam 103 being connected between two fourth prefabricated beams 104; each first prefabricated beam 101 being connected between two third prefabricated beams 103; a first end of each second prefabricated beam 102 being connected to a side of the third prefabricated beam 103 facing away from the first prefabricated beam 101, and a second end being connected to the fourth prefabricated beam 104; the inner frame divides the space enclosed by the outer frame into a plurality of beam grids;

[0049] Prefabricated Qishi plate 200 is installed in the beam grid.

[0050] The prefabricated floor structure provided by the embodiment of the present application is suitable for a large-span floor system. Prefabricated beams and prefabricated odd-shaped panels 200 are processed in a prefabrication plant and then transported to the construction site via transportation equipment. The prefabricated frame 100 and the prefabricated odd-shaped panels are then assembled and hoisted at the construction site. Exemplarily, at the construction site, the fourth prefabricated beam 104 is first hoisted to a corresponding position, such as being placed on the prefabricated columns 300 and connected end to end to form the outer frame of the prefabricated frame 100. The first prefabricated beam 101, the second prefabricated beam 102, and the third prefabricated beam 103 are then assembled into the inner frame of the prefabricated frame 100. The inner frame is hoisted to a corresponding position and connected to the outer frame to form the prefabricated frame 100 using a hoisting device. The prefabricated odd-shaped panels are then hoisted to a corresponding position, i.e., within the beam grid of the prefabricated frame 100 using a hoisting device. Finally, the prefabricated floor structure is assembled into an integrated structure. The present application realizes the assembled structure of the electronic factory. Compared with the on-site construction and casting of floor slabs in the prior art, it saves the process of laying the support frame and platform formwork, reduces the on-site casting construction, and saves the time of dismantling the support frame, greatly simplifies the construction process, and can realize the early delivery of the electronic factory and early production.

[0051] Specifically, the prefabricated frame 100 includes a plurality of prefabricated beams, and the plurality of prefabricated beams include a plurality of first prefabricated beams 101, a plurality of second prefabricated beams 102, a plurality of third prefabricated beams 103, and a plurality of fourth prefabricated beams 104. The plurality of fourth prefabricated beams 104 are connected end to end to form the outer frame of the prefabricated frame 100, and the plurality of first prefabricated beams 101, the plurality of second prefabricated beams 102, and the plurality of third prefabricated beams 103 are connected to form the inner frame of the prefabricated frame 100, and the inner frame divides the space enclosed by the outer frame into a plurality of beam grids. In the prefabricated floor structure provided in the embodiment of the present application, the prefabricated Qi's board 200 is supported by the prefabricated frame 100, realizing a formwork-free and support-free construction process. By manufacturing prefabricated beams in a prefabricated factory, the amount of on-site steel reinforcement work is reduced, and the on-site steel reinforcement is tied at a surface that is easy for workers to operate, thereby ensuring the quality of the steel reinforcement work. Through the combination of the prefabricated frame 100 and the prefabricated Qi board 200, the present application meets the requirements of anti-micro-vibration and high cleanliness, thereby increasing the construction speed, improving the construction quality, and realizing the needs of rapid construction and rapid production of electronic factories.

[0052] In some embodiments, the prefabricated floor structure further includes prefabricated columns 300, to which the prefabricated frame 100 is secured. Prefabricated columns 300 serve as the supporting structure for the entire prefabricated floor structure, providing stable vertical load-bearing capacity. They can be made of steel, concrete, or other high-strength materials, and their size and shape can be customized according to architectural design requirements.

[0053] In the precast frame 100, the outer frame is composed of multiple fourth precast beams 104 connected end to end, forming the outer boundary. The inner frame includes the first precast beam 101, the second precast beam 102, and the third precast beam 103. These beams are interconnected to form a complex internal network, where: the third precast beam 103 is connected between two fourth precast beams 104; the first precast beam 101 is connected between two third precast beams 103; one end of the second precast beam 102 is connected to the side of the third precast beam 103 facing away from the first precast beam 101, and the other end is connected to the fourth precast beam 104. The inner frame divides the long-span floor slab into multiple small grid blocks, reducing the size of the precast Qishi slab 200 and facilitating transportation and lifting.

[0054] Prefabricated Chi-Shing panels 200 are installed within the beam grids separated by the internal frame, providing horizontal coverage and usable space.

[0055] In the above-mentioned external frame, there are many options for the end-to-end connection of the plurality of fourth precast beams 104. For example, in some embodiments of the present application, two adjacent fourth precast beams 104 are directly connected. Or, in other embodiments of the present application, such as Figure 3 and Figure 4 As shown, two adjacent fourth precast beams 104 are connected by a precast column 300 .

[0056] In some embodiments, as Figure 5-Figure 8 As shown, each of the first precast beam 101, the second precast beam 102, the third precast beam 103 and the fourth precast beam 104 includes: a precast shell 110 and a first stirrup 120, and the precast shell 110 and the first stirrup 120 are cast into an integrated structure in the factory; wherein:

[0057] The prefabricated shell 110 includes a U-shaped plate 111 , which includes a bottom plate 1111 and side plates 1112 connected to both sides of the bottom plate 1111 ; the height of the first stirrup 120 away from the bottom plate 1111 is higher than that of the side plates 1112 .

[0058] Each precast beam, namely the first precast beam 101, the second precast beam 102, the third precast beam 103 and the fourth precast beam 104, includes a precast shell 110 and a first stirrup 120, which are cast into an integrated structure in the factory to ensure the integrity and strength of the component. Precise manufacturing and casting in a factory environment reduce the uncertainty of on-site construction and ensure the quality and dimensional accuracy of the component. The precast shell 110 is designed with a U-shaped plate 111. The U-shaped plate 111 consists of a bottom plate 1111 and side plates 1112 connected to both sides of the bottom plate 1111. This shape provides good load-bearing capacity and bending resistance. The height of the first stirrup 120 away from the bottom plate 1111 is higher than the height of the side plate 1112. This design facilitates the connection and fixation of the cast-in-place layer steel cage, realizes the effective connection between the precast layer and the cast-in-place layer, and ensures the integrity of the component.

[0059] Figure 5 The connection structure between the first stirrup 120 and the prefabricated shell 110 is shown. Figure 6 Factory poured concrete 130 is shown, Figure 7 Shown Figure 5 The connection structure between the first stirrup 120 and the prefabricated shell 110 is as follows: Figure 6 A precast beam formed by combining concrete 130. Figure 6 For the purpose of explaining the combination structure, it is not actually present. For example, in a specific implementation, after the first stirrup 120 is connected to the prefabricated shell 110, concrete 130 is poured into the prefabricated shell 110 to form the combination structure. Figure 7 Precast beams.

[0060] In one embodiment, Figure 7 and Figure 8 As shown, the concrete 130 in the precast beam is poured until it is flush with the top surface of the U-shaped plate 111. No longitudinal reinforcement or waist reinforcement is provided inside. The outer U-shaped plate 111 replaces the longitudinal reinforcement to bear the bottom tension, while improving the structural rigidity and facilitating the connection between the precast beams. The exemplary U-shaped plate is a steel plate.

[0061] In some embodiments, as Figure 9 As shown, in the first prefabricated beam 101 , the prefabricated shell 110 further includes a first end plate 112 and a second end plate 113 , and the first end plate 112 and the second end plate 113 are respectively connected to opposite ends of the U-shaped plate 111 .

[0062] It should be noted that the opposite ends of the U-shaped plate 111 can be understood as the opposite ends of the U-shaped plate 111 along the length direction of the precast beam.

[0063] In one embodiment, Figure 9As shown, in the first precast beam 101, the precast shell 110 includes, in addition to the U-shaped plate 111, a first end plate 112 and a second end plate 113. These two end plates are connected to the opposite ends of the U-shaped plate 111, forming a semi-enclosed box-shaped structure, which greatly improves its bending resistance and overall stability. In the precast shell 110 of the first precast beam 101, the ends of the U-shaped plate 111 are sealed by the first end plate 112 and the second end plate 113, and the interior of the precast shell 110 is completely filled with concrete 130. The precast shell 110 and the first stirrups 120 are cast as an integrated structure, ensuring the integrity and strength of the precast beam.

[0064] In the embodiment of the present application, the design of the first end plate 112 and the second end plate 113 facilitates the connection between the first precast beam 101 and the third precast beam 103 , thereby enhancing the connection strength and reliability of the node.

[0065] In some embodiments, as Figure 10 As shown, in the second precast beam 102 , the precast shell 110 further includes a third end plate 114 , which is connected to one end of the U-shaped plate 111 ; and the end of the second precast beam 102 away from the third end plate 114 has a cast-in-place section 115 .

[0066] In one embodiment, Figure 10 As shown, in the second precast beam 102, the precast shell 110 includes, in addition to the U-shaped plate 111, a third end plate 114, which is connected to one end of the U-shaped plate 111. A cast-in-place section 115 is provided at the other end of the U-shaped plate 111. One end of the second precast beam 102 is blocked by the third end plate 114 to block the U-shaped plate 111, while the other end is not provided with an end plate and a certain cast-in-place section 115 is reserved. The reserved cast-in-place section 115 can be understood as the concrete 130 not being poured to the end of the precast shell 110 away from the third end plate 114 along the length of the precast beam. The second precast beam 102 and the third precast beam 103 are connected to the side of the third precast beam 103 by the third end plate 114, which enhances the connection strength and reliability of the node. The second precast beam 102 and the fourth precast beam 104 are connected by the cast-in-place section 115, which enhances the connection strength and reliability of the node.

[0067] In some embodiments, each of the third precast beam 103 and the fourth precast beam 104 has cast-in-place sections 115 at opposite ends.

[0068] In one embodiment, Figure 11As shown, in the third precast beam 103, the opposite ends of the U-shaped plate 111 are not sealed with end plates, and a certain cast-in-place section 115 is reserved for each end, thereby improving the strength of the connection between the third precast beam 103 and the fourth precast beam 104. The reserved cast-in-place section 115 can be understood as the concrete 130 is not poured to the two opposite ends of the precast shell 110 along the length of the precast beam.

[0069] In one embodiment, Figure 12 As shown, in the fourth precast beam 104, the opposite ends of the U-shaped plate 111 are not sealed with end plates, and a certain cast-in-place section 115 is reserved for each end, thereby improving the connection strength between two adjacent fourth precast beams 104. For example, the cast-in-place section 115 of the fourth precast beam 104 improves the connection strength between the fourth precast beam 104 and the precast column 300. The reserved cast-in-place section 115 can be understood as the concrete 130 is not poured to the two opposite ends of the precast shell 110 along the length of the precast beam.

[0070] In some embodiments, as Figure 11 and Figure 12 As shown, the precast shell 110 of each of the third precast beam 103 and the fourth precast beam 104 further includes at least one stiffening rib group 116 connected to the inside of the U-shaped plate 111 , and the stiffening rib group 116 is located at the connection node between the precast beam and other precast beams.

[0071] By providing stiffening rib groups 116 at the connection nodes, the embodiment of the present application significantly improves the bending and shear resistance of the precast beam at that location, ensuring the strength and stability of the connection nodes. Furthermore, the design of stiffening rib groups 116 can effectively disperse the concentrated stress at the connection nodes, preventing damage or deformation of components caused by excessive local stress. Furthermore, although stiffening rib groups 116 are provided, their primary function is to strengthen the performance of the connection nodes and can still be completed in the factory. On-site construction only requires the assembly of the precast beams, maintaining a high level of construction efficiency.

[0072] In one embodiment, Figure 11 As shown, the third precast beam 103 has two stiffening rib groups 116. Each stiffening rib group 116 is located at a connection node between the third precast beam 103 and other precast beams, such as the first precast beam 101 and the second precast beam 102. The two stiffening rib groups 116 are cast together with the precast shell 110 and the first stirrups 120 at the precast plant to form an integrated structure.

[0073] In one embodiment, Figure 12As shown, the fourth precast beam 104 has two stiffening rib groups 116. Each stiffening rib group 116 is located at a connection node between the fourth precast beam 104 and other precast beams, such as the second precast beam 102 and the third precast beam 103. The two stiffening rib groups 116 are cast together with the precast shell 110 and the first stirrups 120 at the precast plant to form an integrated structure.

[0074] In some embodiments, as Figure 11 and Figure 12 As shown, in each of the third precast beam 103 and the fourth precast beam 104, each stiffening rib group 116 includes a first stiffening rib 1161 and a second stiffening rib 1162. The first stiffening rib 1161 is coplanar with one side plate 1112 of the other precast beam to which it is connected, and the second stiffening rib 1162 is coplanar with the other side plate 1112 of the other precast beam to which it is connected. This design ensures precise alignment between the components.

[0075] In some embodiments of the present application, by aligning the stiffening ribs with the side panels 1112 of adjacent precast beams, the alignment accuracy at the connection nodes is significantly improved, reducing the workload of on-site adjustments and improving construction efficiency. This coplanar design ensures more uniform stress distribution at the connection nodes, enhancing the bending and shear resistance of the connection, and ensuring the stability of the entire precast floor structure.

[0076] In one embodiment, Figure 11 As shown, each stiffening rib group 116 in the third precast beam 103 includes two stiffening ribs, namely a first stiffening rib 1161 and a second stiffening rib 1162. The first stiffening rib 1161 and the second stiffening rib 1162 are spaced apart and perpendicular to the extension direction of the third precast beam 103.

[0077] In some embodiments, as Figure 12 As shown, each stiffening rib group 116 further includes at least one third stiffening rib 1163 located between the first stiffening rib 1161 and the second stiffening rib 1162. The third stiffening rib 1163 is located between the first stiffening rib 1161 and the second stiffening rib 1162 to enhance the overall performance of the stiffening rib group 116.

[0078] In one embodiment, Figure 12 As shown, each stiffening rib group 116 in the fourth precast beam 104 includes three stiffening ribs, namely a first stiffening rib 1161, a second stiffening rib 1162, and a third stiffening rib 1163. The first stiffening rib 1161, the second stiffening rib 1162, and the third stiffening rib 1163 are arranged at intervals and are perpendicular to the extension direction of the fourth precast beam 104.

[0079] It should be noted that the number of stiffening rib groups 116 in the third precast beam 103 and the fourth precast beam 104 and the number of stiffening ribs in each stiffening rib group 116 can be increased as needed.

[0080] In some embodiments of the present application, Figure 13 and Figure 14 As shown, both ends of the first precast beam 101 are welded to the two side plates 1112 of the third precast beam 103 via a first end plate 112 and a second end plate 113, respectively, such as by end plate circumferential welding. One end of the second precast beam 102 is welded to the side plates 1112 of the third precast beam 103 via a third end plate 114, such as by end plate circumferential welding. The other end of the second precast beam 102 is welded to the fourth precast beam 104 via three sides of a U-shaped plate 111, such as by three-side circumferential welding of the U-shaped plate 111.

[0081] In some embodiments, as Figure 15 and Figure 16 As shown, in each of the first precast beam 101 , the second precast beam 102 , the third precast beam 103 and the fourth precast beam 104 , a support member 105 for supporting the precast Qishi plate 200 is provided on the outer side of the side plate 1112 ;

[0082] and / or, such as Figure 12 and Figure 14 As shown, a steel corbel 1041 for supporting the second precast beam 102 and / or the third precast beam 103 is provided on the outer side of the side plate 1112 of the fourth precast beam 104 .

[0083] In one embodiment, Figure 15 As shown, in each of the first precast beam 101, the second precast beam 102, the third precast beam 103 and the fourth precast beam 104, a support member 105 for supporting the precast Qishi plate 200 is provided on the outer side of the side plate 1112. Figure 12 and Figure 14 The side panels 1112 of the fourth precast beam 104 are provided with steel brackets 1041 on the outside for supporting the second precast beam 102 and / or the third precast beam 103. During installation, the precast Qishi plate 200 can be placed on the U-shaped plate 111 of the precast beam. The support members 105 provided on the U-shaped plate 111 enable the construction process to be completed without formwork or support.

[0084] In this embodiment of the present application, by providing support members 105 on the outside of the side panels 1112, the precast beams' ability to support the precast Chi-Schmidt panels 200 is significantly enhanced, ensuring the overall stability and load-bearing capacity of the precast floor structure. The design of the steel corbels 1041 enables the fourth precast beam 104 to effectively support the second precast beam 102 and / or the third precast beam 103, enhancing the connection and integrity between the components. These designs not only enhance the structural performance of individual precast beams, but also improve the overall performance of the entire precast floor structure, particularly when subjected to heavy loads or vibrations.

[0085] When implementing it specifically, Figure 16 As shown, in order to effectively support the precast panels, angle steel supports are arranged at intervals along the extension direction of the precast shell 110 of the precast beam. Figure 17 As shown, the prefabricated Qishi plate 200 includes a Qishi tube 230, which forms a hole in the prefabricated Qishi plate 200. To prevent the hole of the prefabricated Qishi plate 200 from being blocked, the angle steel support is arranged at a non-hole position, avoiding the Qishi tube.

[0086] In some embodiments, as Figures 17-21 As shown, each prefabricated Qishi slab 200 includes a floor slab body 210 and a plurality of second stirrups 220 protruding from the floor slab body 210; and each prefabricated Qishi slab 200 is paved with a slab-laminated cast-in-situ layer 400; the slab-laminated cast-in-situ layer 400 includes a first steel cage 401, and the first steel cage 401 includes first high-limb stirrups 410 and first low-limb stirrups 420 alternately arranged along its extension direction, one first high-limb stirrup 410 correspondingly connected to one second stirrup 220, and one first low-limb stirrup 420 correspondingly connected to one second stirrup 220; the first low-limb stirrup 420 abuts against the floor slab body 210; and a gap is formed between the first high-limb stirrup 410 and the floor slab body 210;

[0087] And / or, a beam-mounted cast-in-situ layer 500 is laid on each of the first precast beam 101, the second precast beam 102, the third precast beam 103, and the fourth precast beam 104; wherein:

[0088] The superimposed cast-in-situ layer 500 on the beam includes a steel cage, which includes high-leg stirrups and low-leg stirrups arranged alternately along its extension direction, one high-leg stirrup is connected to a corresponding first stirrup 120, and one low-leg stirrup is connected to another first stirrup 120; the low-leg stirrups are in contact with the concrete poured in the precast shell 110; and there is a gap between the high-leg stirrups and the concrete poured in the precast shell 110.

[0089] In one embodiment, Figure 17As shown, the prefabricated Chi-Shock slab 200 comprises a floor slab body 210, a plurality of second stirrups 220 protruding from the floor slab body 210, and Chi-Shock tubes 230 fixed to the floor slab body 210; the Chi-Shock tubes 230 protrude from the second stirrups 220. The height of the Chi-Shock tubes 230 is the sum of the thickness of the floor slab body 210 and the thickness of the cast-in-place layer. The Chi-Shock tubes 230 are topped with caps to prevent concrete from flowing into the caps during cast-in-place construction. Specifically, the second stirrups 220 and Chi-Shock tubes 230 are cast as a single piece at the prefabrication plant. The second stirrups 220 on the prefabricated Chi-Shock slab 200 are arranged in multiple rows and columns in two vertical directions. The holes in the prefabricated Chi-Shock slab 200 ensure ventilation and cleanliness requirements. This also reduces on-site reinforcement work, requiring only the upper reinforcement to be tied, ensuring high-quality reinforcement work in an area easily accessible to workers.

[0090] like Figure 18 As shown, in the prefabricated floor structure provided by the embodiment of the present application, a plate-laminated cast-in-situ layer 400 is laid on the prefabricated Qishi plate, and a beam-laminated cast-in-situ layer 500 is laid on the prefabricated beam. The plate-laminated cast-in-situ layer 400 includes a first steel cage 401, as shown in FIG. Figure 19 As shown, the first steel cage 401 includes a first high-limb stirrup 410 and a first low-limb stirrup 420. The stirrup arrangement of the hidden beam of the superimposed cast-in-situ layer 400 on the slab adopts a stirrup arrangement method with high and low intervals. The first high-limb stirrup 410 is flush with the top of the second stirrup 220 protruding from the floor slab body 210 in the prefabricated Qishi slab 200, and is used for binding and positioning the waist reinforcement at this position. The first low-limb stirrup 420 falls directly onto the top surface of the floor slab body 210. In other words, the first low-limb stirrup 420 contacts the top surface of the floor slab body 210, which facilitates the accurate positioning of the hidden beam reinforcement of the cast-in-situ layer along the thickness direction of the prefabricated Qishi slab 200.

[0091] like Figure 18 As shown, the superimposed cast-in-situ layer 500 on the beam includes a second steel cage 501 and a third steel cage 502, wherein the second steel cage 501 is arranged above the first precast beam 101 and the second precast beam 102, and the third steel cage 502 is arranged above the third precast beam 103 and the fourth precast beam 104. Figure 20 and Figure 21 As shown, both the second reinforcement cage 501 and the third reinforcement cage 502 include second high-leg stirrups 510 and second low-leg stirrups 520. The stirrups for the concealed beam of the superimposed cast-in-place layer 500 on the beam are arranged with high and low spacing. The second high-leg stirrups 510 are flush with the top of the first stirrups 120 of the precast beam and are used to tie and position the waist reinforcement at this location. The second low-leg stirrups 520 fall directly onto the concrete top surface of the precast beam. In other words, the second low-leg stirrups 520 contact the top surface of the precast beam, facilitating accurate positioning of the cast-in-place concealed beam reinforcement along the thickness of the precast beam.

[0092] It is understood that in the precast floor structure provided in the embodiment of the present application, the cast-in-situ layer reinforcement cage includes the cast-in-situ layer reinforcement cage above the precast beams and the cast-in-situ hidden beam reinforcement cage above the precast Chishi slab 200. To ensure the continuity of the upper longitudinal reinforcement and avoid the difficulty of installation caused by staggered stirrups, the upper longitudinal reinforcement of the first precast beam 101 and the second precast beam 102 are connected to form a joint reinforcement cage. The second high-leg stirrups 510 and the second low-leg stirrups 520 avoid the intersection area with the third precast beam 103, and the waist reinforcement is inserted and tied afterward.

[0093] The following describes the construction steps of the prefabricated floor structure provided in the embodiment of the present application using a specific embodiment.

[0094] S1. Install and fix four fourth prefabricated beams 104 on four prefabricated columns 300. The four fourth prefabricated beams 104 are connected end to end through the prefabricated columns 300 to form the outer frame of the prefabricated frame 100. Figure 22 shown.

[0095] S2, connect the first prefabricated beam 101, the second prefabricated beam 102 and the third prefabricated beam 103 on the ground to form a well-shaped beam frame, i.e., the inner frame of the prefabricated frame 100, as shown in FIG. Figure 23 shown.

[0096] S3, hoist the whole cross-shaped beam frame and place it on the steel bracket 1041 of the fourth prefabricated beam 104 on the four sides, and weld it to the side plate 1112 of the first prefabricated beam 101 to complete the assembly of the prefabricated frame 100. Figure 24 shown.

[0097] S4, hoist the prefabricated Qishi plate 200 with Qishi tube and place it on the supporting angle steel piece on the top surface of the prefabricated beam, such as Figure 3 shown.

[0098] S5, install the fixed cast-in-situ layer beam reinforcement cage; first install the third precast beam 103 and the fourth precast beam 104 above the cast-in-situ layer reinforcement cage, and then install the first precast beam 101 and the second precast beam 102 above the cast-in-situ layer joint reinforcement cage, such as Figure 25 Then install the prefabricated Qi's plate 200 above the cast-in-place layer of hidden beam reinforcement cage, such as Figure 26 shown.

[0099] S6. Finally, pour the beam and slab concrete of the cast-in-situ layer to form the superimposed cast-in-situ layer 400 on the slab and the superimposed cast-in-situ layer 500 on the beam.

[0100] In the embodiment of the present application, the prefabricated frame 100 and the prefabricated Chi board 200 are formed into a whole through the cast-in-place layer, and the floor slab has high rigidity, meeting the requirements for preventing micro-vibration of the process layer floor slab.

[0101] Obviously, those skilled in the art may make various changes and modifications to the embodiments of the present application without departing from the spirit and scope of the present application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations.

Claims

1. A prefabricated floor structure suitable for large spans, characterized in that: include: A prefabricated frame comprising an outer frame and an inner frame; the outer frame comprising a plurality of fourth prefabricated beams connected end to end; the inner frame comprising a plurality of first prefabricated beams, a plurality of second prefabricated beams, and a plurality of third prefabricated beams, each of the third prefabricated beams being connected between two of the fourth prefabricated beams; each of the first prefabricated beams being connected between two of the third prefabricated beams; each of the second prefabricated beams having a first end connected to a side of the third prefabricated beam facing away from the first prefabricated beam and a second end connected to the fourth prefabricated beam; the inner frame dividing the space enclosed by the outer frame into a plurality of beam grids; Prefabricated Qishi panels are installed in the beam grids; Each of the first precast beam, the second precast beam, the third precast beam and the fourth precast beam comprises: a precast shell and a first stirrup, wherein the precast shell and the first stirrup are cast with concrete in a factory to form an integrated structure; wherein: The prefabricated shell includes a U-shaped plate, and the U-shaped plate includes a bottom plate and side plates connected to both sides of the bottom plate; the height of the first stirrup away from the bottom plate is higher than the height of the side plates; In the first precast beam, the precast shell further comprises a first end plate and a second end plate, wherein the first end plate and the second end plate are respectively connected to opposite ends of the U-shaped plate; In the second precast beam, the precast shell further comprises a third end plate, the third end plate being connected to one end of the U-shaped plate; and the second precast beam has a cast-in-place section at one end away from the third end plate; Each of the third precast beam and the fourth precast beam has a cast-in-place section at opposite ends; The precast shell of each of the third precast beam and the fourth precast beam further includes at least one stiffening rib group connected to the interior of the U-shaped plate, wherein the stiffening rib group is located at a connection node where the precast beam is connected to other precast beams; In each of the third precast beam and the fourth precast beam, each stiffening rib group includes a first stiffening rib and a second stiffening rib, the first stiffening rib is coplanar with one side plate of the other precast beam connected to the precast beam, and the second stiffening rib is coplanar with the other side plate of the other precast beam connected to the precast beam; Each of the stiffening rib groups further includes at least one third stiffening rib located between the first stiffening rib and the second stiffening rib.

2. The prefabricated floor structure according to claim 1, characterized in that: In each of the first precast beam, the second precast beam, the third precast beam and the fourth precast beam, a support member for supporting the precast Qishi plate is provided on the outer side of the side plate; And / or, a steel corbel for supporting the second precast beam and / or the third precast beam is provided on the outer side of the side plate of the fourth precast beam.

3. The prefabricated floor structure according to any one of claims 1-2, characterized in that: Each of the prefabricated Qishi slabs includes a floor slab body and a plurality of second stirrups protruding from the floor slab body; and each of the prefabricated Qishi slabs is paved with a laminated cast-in-situ layer on the floor; the laminated cast-in-situ layer on the floor slab includes a first steel cage, the first steel cage includes first high-limb stirrups and first low-limb stirrups alternately arranged along its extension direction, one first high-limb stirrup is connected to one second stirrup correspondingly, and one first low-limb stirrup is connected to one second stirrup correspondingly; the first low-limb stirrups abut against the floor slab body; and a gap is formed between the first high-limb stirrups and the floor slab body; And / or, each of the first precast beam, the second precast beam, the third precast beam and the fourth precast beam is provided with a beam-mounted cast-in-situ layer; wherein: The superimposed cast-in-situ layer on the beam includes a steel cage, which includes high-limb stirrups and low-limb stirrups alternately arranged along its extension direction, one high-limb stirrup is connected to one first stirrup, and one low-limb stirrup is connected to another first stirrup; the low-limb stirrups are in contact with the concrete poured in the prefabricated shell; and there is a gap between the high-limb stirrups and the concrete poured in the prefabricated shell.

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