Reinforced concrete cast-in-place large-bay pipe core floor slab and construction technology thereof

Abstract

The invention provides a reinforced concrete cast-in-place large-bay pipe core floor slab and a construction technology thereof, and relates to the field of building construction. Annular reinforcing ribs are arranged on the top of the composite pipe core in a surrounding mode, a supporting cross beam is inserted into the bottom of the composite pipe core, the bottom of the supporting cross beam is connected with a bottom layer plate through connecting bolts, transverse reinforcing ribs are arranged on the front side and the rear side of the supporting cross beam, and longitudinal reinforcing ribs are inserted into the supporting cross beam at equal intervals in a penetrating mode. Reinforcing hoops are installed at the intersections of the annular reinforcing ribs, the transverse reinforcing ribs and the longitudinal reinforcing ribs. Through the design of the oval hollow structure and the reinforcing supporting pipe of the composite pipe core, the bearing performance is guaranteed while the self weight is reduced, the oval structure enables concrete stress to be more uniform, stress concentration is reduced, the reinforcing supporting pipe improves the deformation resistance, the reinforcing structure is combined, the mechanical property of the floor is comprehensively enhanced, loads are dispersed, and the crack resistance and compressive strength are improved; the problems that a floor slab is too large in dead weight, low in construction efficiency and insufficient in crack resistance and durability are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, in particular to a reinforced concrete cast-in-place large-span tubular core floor slab and a construction process thereof. Background Art

[0002] In the field of modern construction engineering, large-span buildings made of reinforced concrete are increasingly favored by the market. With their unique spatial structure design, large-span buildings can provide users with more flexible and changeable spatial layouts. Whether it is used for free separation of commercial places or personalized creation of residential space, they can easily meet diverse usage needs.

[0003] Based on the above, the existing reinforced concrete cast-in-place large-span tube core floor slab and its construction process have the following shortcomings:

[0004] Existing large-span floor slabs have problems such as excessive self-weight leading to increased foundation load, low construction efficiency and difficult precision control, poor crack resistance and insufficient durability. Traditional solid reinforced concrete floor slabs not only increase foundation treatment costs and construction difficulty, but also have complicated construction procedures and component positioning that relies on manual experience, resulting in long cycles and prone to deviations. They are also prone to cracks under the action of temperature stress and loads. Summary of the Invention

[0005] The present invention relates to a reinforced concrete cast-in-place large-span tubular core floor slab and a construction process thereof. The elliptical hollow structure of the composite tubular core and the reinforced support tube design ensure the load-bearing performance while reducing the deadweight. The elliptical structure makes the concrete more evenly stressed and reduces stress concentration. The reinforced support tube improves the deformation resistance. The "I"-shaped support beam closely cooperates with the composite tubular core. Combined with the reinforced structure consisting of annular reinforcement bars, transverse reinforcement bars, longitudinal reinforcement bars and reinforced hoops, the mechanical properties of the floor slab are enhanced in all directions, the load is dispersed, the crack resistance and compressive strength are improved, and the structural reliability and durability under large spans are guaranteed.

[0006] The present invention provides a reinforced concrete cast-in-place large-span tube core floor and a construction process thereof, which specifically comprises: a composite tube core; an annular reinforcement rib is arranged around the top of the composite tube core, a supporting beam is inserted into the bottom of the composite tube core, the bottom of the supporting beam is connected to the bottom plate by connecting bolts, transverse reinforcement ribs are provided on the front and rear sides of the supporting beam, longitudinal reinforcement ribs are equidistantly interspersed inside the supporting beam, and reinforcement hoops are installed at the intersections of the annular reinforcement ribs, the transverse reinforcement ribs and the longitudinal reinforcement ribs.

[0007] Furthermore, the composite tube core is a hollow structure with an elliptical cross-section, and alignment grooves are provided at equal distances on the top curved outer wall of the composite tube core. A hollow cylindrical reinforcing support tube is installed inside the hollow interior of the composite tube core, and rectangular connection slots are provided at equal distances at the bottom of the composite tube core.

[0008] Furthermore, the composite tube core is made of a mixture of thin-wall plastic and fiber-reinforced composite material.

[0009] Furthermore, the cross-section of the supporting beam is in the shape of an "I", and alignment blocks are installed at equal distances in the middle of the top end face of the supporting beam. The alignment blocks are inserted into the connecting slots provided on the bottom end face of the composite tube core, and the top ends of the alignment blocks are arc-shaped and fit on the top inner wall of the reinforced support tube of the composite tube core. Circular reinforcing rib through-holes are provided in the front and rear side walls of the supporting beam body between adjacent alignment blocks, and longitudinal reinforcing ribs are inserted and connected in the reinforcing rib through-holes.

[0010] Furthermore, the main body of the annular reinforcement rib is in an "n" shape, and the front and rear ends of the annular reinforcement rib are provided with upward curved connecting bends. The bottom of the annular reinforcement rib main body is clamped in the alignment groove of the outer wall of the top of the composite tube core, and the connecting bends at the front and rear ends of the annular reinforcement rib surround the bottom of the transverse reinforcement ribs on the front and rear sides of the supporting beam.

[0011] Furthermore, a transverse slot is provided at the bottom of the left and right side walls of the reinforcement clamp, which is clamped on the transverse reinforcement rib; a longitudinal slot is provided on the right side of the front and rear side walls of the reinforcement clamp, which is clamped on the longitudinal reinforcement rib; an annular slot is provided in the left side wall of the reinforcement clamp, which is clamped on the connecting bends at the front and rear ends of the annular reinforcement rib.

[0012] Furthermore, alignment rods are installed at equal distances at the corresponding positions of the top end surface of the bottom plate and the bottom of the supporting beam, and connecting bolts are installed in the end surfaces of the bottom plate between the connected alignment rods, and the top ends of the connecting bolts are threadedly connected to the bottom end surface of the supporting beam.

[0013] Furthermore, the annular reinforcement ribs, transverse reinforcement ribs, longitudinal reinforcement ribs and reinforcement hoops together constitute a reinforcement structure, and the transverse reinforcement ribs and longitudinal reinforcement ribs are perpendicularly interwoven to form a stable steel mesh structure.

[0014] Furthermore, an anti-cracking layer is attached to the upper surface of the bottom plate, and the anti-cracking layer is composed of a mixture of fiber concrete and polymer mortar.

[0015] The present invention discloses a construction process for a reinforced concrete cast-in-place large-span tubular core floor slab, comprising the following steps:

[0016] 1) First, hoist the support beam to the designated location and use a level and total station to accurately level and position it to ensure that the horizontality and verticality of the support beam meet the design requirements. Then, use the alignment rod to preliminarily position the bottom plate at the corresponding position of the bottom of the support beam.

[0017] 2) Use connecting bolts to fasten the bottom plate to the supporting beam. Tighten the connecting bolts to ensure a firm connection and a tight fit between the bottom plate and the supporting beam 2.

[0018] 3) Then, insert the longitudinal reinforcement bars sequentially through the reinforcement holes on the front and rear side walls of the support beam, ensuring that the length of the longitudinal reinforcement bars meets the design requirements and that the length of the longitudinal reinforcement bars extending beyond the support beam at both ends meets the anchoring requirements. The longitudinal reinforcement bars can be secured to the support beam by tying or welding.

[0019] 4) Install transverse reinforcement bars on the front and rear sides of the support beam, interweaving them perpendicularly with the longitudinal reinforcement bars to form a steel mesh structure. At the intersections, securely connect the transverse reinforcement bars to the longitudinal reinforcement bars by tying or welding them together to ensure the integrity and stability of the steel mesh.

[0020] 5) Lift the composite tube core to the installation position, align the connection slot at the bottom of the composite tube core with the alignment block at the top of the support beam, slowly lower the composite tube core, and insert the alignment block into the connection slot to ensure that the composite tube core is tightly connected to the support beam and that the position of the composite tube core is accurate. Check the direction and position of the alignment slot on the curved outer wall at the top of the composite tube core to prepare for the subsequent installation of the annular reinforcement ribs.

[0021] 6) Clamp the bottom of the annular reinforcement body into the alignment slot on the outer side wall of the top of the composite tube core. At the same time, bend the front and rear ends of the annular reinforcement back around the bottom of the transverse reinforcement on the front and rear sides of the support beam. Use welding to fix the annular reinforcement to the composite tube core and transverse reinforcement to ensure a firm connection.

[0022] 7) Install reinforcement hoops at the intersection of the annular reinforcement ribs, transverse reinforcement ribs, and longitudinal reinforcement ribs. Connect the transverse slots of the reinforcement hoop to the transverse reinforcement ribs, the longitudinal slots to the longitudinal reinforcement ribs, and the annular slots to the connecting bends at the front and rear ends of the annular reinforcement ribs. Adjust the position of the reinforcement hoop so that it fits tightly against the reinforcement ribs to ensure the stability of the reinforced structure.

[0023] 8). After completing the installation of the above components, conduct a comprehensive inspection of the entire floor structure to ensure that the installation position of each component is accurate and the connection is firm. Use a concrete pump truck to transport concrete to the pouring site and pour concrete from one end to the other, layer by layer and segment by segment. During the pouring process, use a vibrator to vibrate the concrete to make it dense to avoid quality problems such as honeycomb and rough surface. When vibrating, be careful not to let the vibrator touch the composite pipe core, reinforcement and other components to prevent them from shifting or deforming. Control the pouring speed and height of the concrete to avoid pouring the concrete too fast or too high, which may cause the composite pipe core to float or shift. During the concrete pouring process, arrange for a dedicated person to monitor the floor structure.

[0024] The present invention provides a reinforced concrete cast-in-place large-span tubular core floor slab and a construction process thereof, which has the following beneficial effects:

[0025] 1. The present invention ensures load-bearing performance while reducing its own weight through the elliptical hollow structure of the composite tube core and the reinforced support tube design. The elliptical structure makes the concrete more evenly stressed and reduces stress concentration. The reinforced support tube improves the deformation resistance. The "I"-shaped support beam closely cooperates with the composite tube core, combined with the reinforced structure composed of annular reinforcement bars, transverse reinforcement bars, longitudinal reinforcement bars and reinforced hoops, to comprehensively enhance the mechanical properties of the floor slab, disperse the load, improve the crack resistance and compressive strength, and ensure the structural reliability and durability under large spans.

[0026] 2. The alignment slots and connection slots of the composite tube core, as well as the alignment blocks of the supporting beams, are designed to facilitate precise positioning and rapid assembly of each component, thereby improving construction efficiency. The multi-slot design of the reinforcement hoop makes the fixing of the reinforcement ribs simple and quick. At the same time, the components are tightly and stably connected, which can effectively prevent displacement and deformation during concrete pouring, thereby ensuring construction quality. This connection method is also convenient for disassembly and maintenance, reducing the cost of later maintenance.

[0027] 3. The composite tube core made of thin-walled plastic and fiber-reinforced composite materials gives the floor slab light weight, high strength and corrosion resistance. Its good thermal insulation and sound insulation properties create a comfortable environment for the building. The anti-cracking layer composed of fiber concrete and polymer mortar on the bottom slab effectively inhibits the occurrence of cracks, improves the durability of the floor slab, extends the service life of the building, reduces subsequent maintenance costs, and ensures the long-term safety and stability of the building structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments are briefly introduced below.

[0029] The drawings described below only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0030] In the attached figure:

[0031] Figure 1 It is a schematic diagram of the axial structure of a reinforced concrete cast-in-place large-span tubular core floor slab according to an embodiment of the present invention.

[0032] Figure 2 It is a side structural schematic diagram of a reinforced concrete cast-in-place large-span tubular core floor slab according to an embodiment of the present invention.

[0033] Figure 3 It is a schematic diagram of the structure of a reinforced concrete cast-in-place large-span tubular core floor slab viewed from above according to an embodiment of the present invention.

[0034] Figure 4It is a schematic diagram of the overall split structure of the reinforced concrete cast-in-place large-span tubular core floor slab according to an embodiment of the present invention.

[0035] Figure 5 It is a schematic diagram of the disassembled structure of the composite tube core, supporting beams and annular reinforcement of the reinforced concrete cast-in-place large-span tube core floor according to an embodiment of the present invention.

[0036] Figure 6 It is a schematic diagram of the connection structure of the annular reinforcement and the transverse reinforcement of the reinforced concrete cast-in-place large-span tubular core floor according to an embodiment of the present invention.

[0037] Figure 7 It is a schematic diagram of the split structure of the composite tube core and supporting beams of the reinforced concrete cast-in-place large-span tube core floor according to an embodiment of the present invention.

[0038] Figure 8 It is a schematic diagram of the reinforcement hoop structure of the reinforced concrete cast-in-place large-span tubular core floor slab according to an embodiment of the present invention.

[0039] Reference Signs List

[0040] 1. Composite tube core; 101. Alignment slot; 102. Reinforced support tube; 103. Connection slot; 2. Support beam; 201. Alignment block; 202. Reinforcement rib perforation; 3. Annular reinforcement rib; 301. Connection bend; 4. Horizontal reinforcement rib; 5. Longitudinal reinforcement rib; 6. Reinforcement hoop; 601. Horizontal slot; 602. Longitudinal slot; 603. Annular slot; 7. Bottom plate; 701. Alignment rod; 8. Connection bolt. DETAILED DESCRIPTION

[0041] In order to make the purpose, scheme and advantages of the technical solution of the present invention more clear, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of specific embodiments of the present invention. Unless otherwise specified, the terms used herein have the common meanings in the art. The same reference numerals in the drawings represent the same components.

[0042] Example 1: Please refer to Figures 1 to 8 As shown:

[0043] The present invention provides a reinforced concrete cast-in-place large-span tube core floor and its construction process, comprising a composite tube core 1, an annular reinforcement rib 3 is arranged around the top of the composite tube core 1, a supporting beam 2 is inserted into the bottom of the composite tube core 1, the bottom of the supporting beam 2 is connected to a bottom plate 7 by a connecting bolt 8, transverse reinforcement ribs 4 are provided on the front and rear sides of the supporting beam 2, longitudinal reinforcement ribs 5 are equidistantly inserted into the interior of the supporting beam 2, and reinforcement hoops 6 are installed at the intersections of the annular reinforcement ribs 3, the transverse reinforcement ribs 4 and the longitudinal reinforcement ribs 5.

[0044] Among them, the composite tube core 1 is a hollow structure with an elliptical cross-section. Alignment grooves 101 are equidistantly provided on the top curved outer wall of the composite tube core 1. A hollow cylindrical reinforcing support tube 102 is installed inside the hollow of the composite tube core 1. Rectangular connection slots 103 are equidistantly provided at the bottom of the composite tube core 1. Therefore, the elliptical hollow structure effectively reduces the deadweight of the floor without reducing the overall bearing performance. The alignment grooves 101 facilitate the precise positioning and installation of the annular reinforcement ribs 3, thereby improving construction efficiency. The strengthening support tube 102 enhances the internal structural strength of the composite tube core 1 and prevents compression deformation. The connection slots 103 facilitate quick assembly with the supporting beam 2 to ensure the tightness and stability of the connection between each component.

[0045] Among them, the composite tube core 1 is made of a mixture of thin-walled plastic and fiber-reinforced composite materials. Therefore, the combination of thin-walled plastic and fiber-reinforced composite materials gives the composite tube core 1 the characteristics of light weight, high strength and corrosion resistance, while reducing material costs and extending the service life of the floor. The good plasticity of the material facilitates the tube core molding, adapts to the needs of different construction scenarios, and can also reduce material loss during the construction process.

[0046] By adopting the above technical solution, through the unique elliptical hollow structure of the composite tube core 1 and the design of the reinforced support tube 102, the self-weight of the floor slab is greatly reduced while the compressive strength and structural stability of the composite tube core 1 are effectively enhanced. The elliptical cross-section makes the force more uniform during concrete pouring, reducing stress concentration. The reinforced support tube 102 inside the hollow further enhances the deformation resistance of the composite tube core 1, ensuring that it is not easily damaged when bearing upper loads. At the same time, the mixed material of thin-walled plastic and fiber-reinforced composite materials is not only light in weight, but also has good thermal insulation and sound insulation properties, which can effectively improve the thermal insulation and sound insulation and noise reduction effects of the floor slab, creating a more comfortable environment inside the building.

[0047] The cross section of the supporting beam 2 is in the shape of an "I" character, and an alignment block 201 is installed at equal distances in the middle of the top end face of the supporting beam 2. The alignment block 201 is inserted into the connecting slot 103 provided on the bottom end face of the composite tube core 1, and the top of the alignment block 201 is arc-shaped and fits on the top inner wall of the reinforcing support tube 102 of the composite tube core 1. Circular reinforcing rib through-holes 202 are provided in the front and rear side walls of the main body of the supporting beam 2 between adjacent alignment blocks 201, and longitudinal reinforcing ribs 5 are inserted and connected in the reinforcing rib through-holes 202. Therefore, the "I"-shaped structure enables the supporting beam 2 to have good bending and shear resistance, effectively disperses the floor load, and the coordination of the alignment block 201 with the connecting slot 103 and the reinforcing support tube 102 enhances the stability of the connection between the supporting beam 2 and the composite tube core 1. The reinforcing rib through-holes 202 facilitate the insertion and installation of the longitudinal reinforcing ribs 5, so that the longitudinal reinforcing ribs 5 are closely combined with the supporting beam 2, further improving the overall structural strength.

[0048] Among them, the main body of the annular reinforcement rib 3 is "n"-shaped, and the front and rear ends of the annular reinforcement rib 3 are provided with upwardly curved connecting bends 301. The bottom of the main body of the annular reinforcement rib 3 is clamped in the alignment groove 101 on the outer side wall of the top of the composite tube core 1, and the connecting bends 301 at the front and rear ends of the annular reinforcement rib 3 surround the bottom of the transverse reinforcement ribs 4 on the front and rear sides of the supporting beam 2. Therefore, the annular reinforcement rib 3 with an "n"-shaped structure can effectively restrain the top of the composite tube core 1 to prevent it from lateral deformation when subjected to force. The cooperation of the connecting bend 301 and the transverse reinforcement rib 4 firmly connects the composite tube core 1, the supporting beam 2 and the transverse reinforcement rib 4 to form a coordinated force system, thereby improving the overall stability and bearing capacity of the floor slab.

[0049] Among them, the annular reinforcement ribs 3, transverse reinforcement ribs 4, longitudinal reinforcement ribs 5 and reinforcement hoops 6 together constitute a reinforcement structure. The transverse reinforcement ribs 4 and longitudinal reinforcement ribs 5 are perpendicularly interwoven to form a stable steel mesh structure. Therefore, the reinforcement structure improves the mechanical properties of the floor slab in all directions. The steel mesh structure effectively disperses the load on the floor slab, enhances the crack resistance and compressive strength of the floor slab, and the reinforcement hoops 6 tightly fix the reinforcement ribs to prevent the steel bars from shifting during the concrete pouring process, thereby ensuring the effectiveness of the reinforcement structure and ensuring the safety of the floor slab during long-term use.

[0050] Among them, horizontal slots 601 are provided at the bottom of the left and right side walls of the reinforcement hoop 6, and the horizontal slots 601 are clamped on the horizontal reinforcement rib 4. Longitudinal slots 602 are provided on the right side of the front and rear side walls of the reinforcement hoop 6, and the longitudinal slots 602 are clamped on the longitudinal reinforcement rib 5. An annular slot 603 is provided in the left side wall of the reinforcement hoop 6, and the annular slot 603 is clamped on the connecting bends 301 at the front and rear ends of the annular reinforcement rib 3. Therefore, this multi-slot design realizes the precise and tight connection between the reinforcement hoop 6 and each reinforcement rib, is simple and quick to operate, and can quickly complete the fixation of the reinforcement ribs. The restraining effect of the reinforcement hoop 6 on each reinforcement rib effectively enhances the integrity of the steel mesh and improves the structural reliability of the floor under complex stress conditions.

[0051] By adopting the above technical solution, the connection strength and stability between the support beam 2 and the composite tube core 1 are enhanced through the "I"-shaped cross-section design of the support beam 2 and the cooperation of the positioning block 201 and the connection slot 103. The "I"-shaped structure enables the support beam 2 itself to have a higher bending strength and can better disperse and transfer the load. The positioning block 201 is inserted into the connection slot 103 and fits the inner wall of the strengthening support tube 102, ensuring the effective transmission of force between the support beam 2 and the composite tube core 1, so that the two work together. The reinforcement holes 202 facilitate the insertion of the longitudinal reinforcement ribs 5, further strengthening the connection between the supporting beam 2 and the entire reinforcement structure, and improving the overall bearing performance of the floor. The connection between the top of the composite tube core 1 and the steel mesh is effectively strengthened through the connection between the "n"-shaped main body of the annular reinforcement rib 3 and the positioning groove 101, and the surrounding cooperation between the connecting bend 301 and the transverse reinforcement rib 4. The annular reinforcement rib 3 is inserted into the positioning groove 101 to limit the displacement of the composite tube core 1 in the horizontal direction. At the same time, the connecting bend 301 surrounds the transverse reinforcement 4, tightly combining the composite tube core 1 and the steel mesh into a whole, enhancing the coordination between the various components of the floor when subjected to force. During the concrete pouring process, this connection method can also prevent the composite tube core 1 from floating or deflecting, ensuring the accuracy and stability of the floor structure. The reinforcement structure composed of the annular reinforcement 3, transverse reinforcement 4, longitudinal reinforcement 5 and reinforcement hoop 6 significantly improves the overall strength and deformation resistance of the floor. The steel mesh composed of the transverse reinforcement 4 and the longitudinal reinforcement 5 provides the floor with good horizontal bearing capacity and effectively resists the bending stress caused by the load. The reinforcement hoop 6 is respectively connected to the transverse reinforcement 4, longitudinal reinforcement 5 and annular reinforcement 3 through its transverse clamping groove 601, longitudinal clamping groove 602 and annular clamping groove 603, firmly connecting the reinforcements together, preventing the reinforcements from relative displacement when subjected to force, and making the reinforcement structure form a stable whole, thereby greatly enhancing the structural reliability and durability of the floor under large spans.

[0052] Among them, alignment rods 701 are installed at equal distances at the corresponding positions of the top end face of the bottom plate 7 and the bottom of the supporting beam 2, and connecting bolts 8 are installed in the end faces of the bottom plate 7 between the connected alignment rods 701. The top end of the connecting bolt 8 is threadedly connected to the bottom end face of the supporting beam 2. Therefore, the alignment rod 701 facilitates the rapid positioning and installation of the bottom plate 7 and the supporting beam 2, ensuring the installation accuracy. The connection method of the connecting bolt 8 makes the bottom plate 7 and the supporting beam 2 firmly combined, enhances the stability of the bottom structure of the floor slab, facilitates subsequent construction operations, and is convenient for disassembly and maintenance, reducing the cost of later maintenance.

[0053] Among them, an anti-cracking layer is attached to the upper surface of the bottom plate 7, and the anti-cracking layer is composed of a mixture of fiber concrete and polymer mortar. Therefore, the anti-cracking layer composed of a mixture of fiber concrete and polymer mortar on the bottom plate 7 effectively prevents the generation of cracks on the floor surface. The fibers in the fiber concrete can disperse the stress inside the concrete and inhibit the expansion of microcracks, and the good flexibility and adhesion of the polymer mortar can fill the subtle defects on the concrete surface and enhance the crack resistance of the concrete surface. The existence of the anti-cracking layer improves the durability of the floor, extends the service life of the floor, reduces the subsequent maintenance costs, and ensures the long-term safety and stability of the building structure.

[0054] By adopting the above technical solution, the bottom plate 7 and the supporting beam 2 are firmly connected by setting the alignment rod 701 and the connecting bolt 8 on the bottom plate 7, ensuring that the bottom plate 7 can reliably support the entire floor structure. The alignment rod 701 plays a positioning role, facilitating the accurate installation of the bottom plate 7 and the supporting beam 2, and the connecting bolt 8 provides a strong fastening force, so that the two are tightly combined to jointly bear the load of the floor. This connection method is simple and reliable, convenient for construction operation, and also improves the efficiency and quality of floor installation.

[0055] The present invention discloses a construction process for a reinforced concrete cast-in-place large-span tubular core floor slab, comprising the following steps:

[0056] 1) First, hoist the support beam 2 to the designated location and use a level and total station to accurately level and position it to ensure that the horizontality and verticality of the support beam 2 meet the design requirements. Then, initially position the bottom plate 7 by aligning the rod 701 with the corresponding position at the bottom of the support beam 2;

[0057] 2) Use the connecting bolts 8 to fasten the bottom plate 7 to the supporting beam 2. Tighten the connecting bolts 8 to ensure a firm connection and a close fit between the bottom plate 7 and the supporting beam 2.

[0058] 3) Then, insert the longitudinal reinforcement ribs 5 sequentially into the reinforcement holes 202 on the front and rear side walls of the support beam 2, ensuring that the length of the longitudinal reinforcement ribs 5 meets the design requirements and that the length of the ends extending beyond the support beam 2 meets the anchoring requirements. Fix the longitudinal reinforcement ribs 5 by tying or welding them to the support beam 2.

[0059] 4) Then install transverse reinforcement ribs 4 on the front and rear sides of the support beam 2, so that the transverse reinforcement ribs 4 and the longitudinal reinforcement ribs 5 are perpendicularly interwoven to form a steel mesh structure. At the intersection, the transverse reinforcement ribs 4 and the longitudinal reinforcement ribs 5 are firmly connected by tying or welding to ensure the integrity and stability of the steel mesh;

[0060] 5) Lift the composite tube core 1 to the installation position, align the connection slot 103 at the bottom of the composite tube core 1 with the alignment block 201 at the top of the support beam 2, slowly lower the composite tube core 1, and insert the alignment block 201 into the connection slot 103 to ensure that the composite tube core 1 is tightly connected to the support beam 2 and that the position of the composite tube core 1 is accurate. Check the direction and position of the alignment slot 101 on the curved outer wall at the top of the composite tube core 1 to prepare for the subsequent installation of the annular reinforcement rib 3;

[0061] 6) Attach the bottom of the annular reinforcement rib 3 to the alignment slot 101 on the top outer wall of the composite tube core 1. At the same time, wrap the connecting bends 301 at the front and rear ends of the annular reinforcement rib 3 around the bottom of the transverse reinforcement rib 4 on the front and rear sides of the support beam 2. Weld the annular reinforcement rib 3 to the composite tube core 1 and the transverse reinforcement rib 4 to ensure a secure connection.

[0062] 7) Install the reinforcement hoop 6 at the intersection of the annular reinforcement rib 3, the transverse reinforcement rib 4, and the longitudinal reinforcement rib 5. Attach the transverse slot 601 of the reinforcement hoop 6 to the transverse reinforcement rib 4, the longitudinal slot 602 to the longitudinal reinforcement rib 5, and the annular slot 603 to the connection bend 301 at the front and rear ends of the annular reinforcement rib 3. Adjust the position of the reinforcement hoop 6 so that it fits tightly against the reinforcement ribs to ensure the stability of the reinforced structure.

[0063] 8). After completing the installation of the above components, conduct a comprehensive inspection of the entire floor structure to ensure that the installation position of each component is accurate and the connection is firm. Use a concrete pump truck to transport concrete to the pouring site and pour concrete from one end to the other, in layers and sections. During the pouring process, use a vibrator to vibrate the concrete to make it dense to avoid quality problems such as honeycomb and rough surface. When vibrating, be careful not to let the vibrator touch the composite tube core 1, reinforcement and other components to prevent them from shifting or deforming. Control the pouring speed and height of the concrete to avoid pouring the concrete too fast or too high, which may cause the composite tube core 1 to float or shift. During the concrete pouring process, arrange for a dedicated person to monitor the floor structure.

[0064] Specific usage and function of this embodiment: In the present invention, the support beam 2 is first hoisted to the specified position, and the level and total station are used to perform precise leveling and positioning to ensure that the horizontality and verticality of the support beam 2 meet the design requirements, and then the bottom plate 7 is preliminarily positioned at the corresponding position of the bottom of the support beam 2 through the alignment rod 701, and then the bottom plate 7 is fastened to the support beam 2 using the connecting bolts 8. Tighten the connecting bolts 8 to ensure that the connection is firm and the bottom plate 7 fits tightly to the support beam 2. Then, the longitudinal reinforcing ribs 5 are sequentially inserted into the reinforcing rib perforations 202 on the front and rear side walls of the main body of the support beam 2 to ensure that the length of the longitudinal reinforcing ribs 5 meets the design requirements and the length of the two ends extending out of the support beam 2 meets the anchoring requirements. The reinforcing ribs 5 are fixed and can be connected to the supporting crossbeam 2 by welding, and then the transverse reinforcing ribs 4 are installed on the front and rear sides of the supporting crossbeam 2, so that the transverse reinforcing ribs 4 and the longitudinal reinforcing ribs 5 are perpendicularly interwoven to form a steel mesh structure. At the intersection, the transverse reinforcing ribs 4 and the longitudinal reinforcing ribs 5 are firmly connected by welding to ensure the integrity and stability of the steel mesh. The composite tube core 1 is hoisted to the installation position, and the connection slot 103 at the bottom of the composite tube core 1 is aligned with the alignment block 201 at the top of the supporting crossbeam 2. The composite tube core 1 is slowly lowered and the alignment block 201 is inserted into the connection slot 103 to ensure that the composite tube core 1 is tightly connected to the supporting crossbeam 2 and the position of the composite tube core 1 is accurate. Check the outer wall of the curved top of the composite tube core 1. The direction and position of the alignment slot 101 are prepared for the subsequent installation of the annular reinforcement rib 3. The bottom of the annular reinforcement rib 3 is clamped in the alignment slot 101 of the top outer wall of the composite tube core 1. At the same time, the connection bends 301 at the front and rear ends of the annular reinforcement rib 3 are wrapped around the bottom of the transverse reinforcement ribs 4 on the front and rear sides of the supporting beam 2. The annular reinforcement rib 3 is fixedly connected to the composite tube core 1 and the transverse reinforcement rib 4 using binding wire or welding to ensure a firm connection. The reinforcement hoop 6 is installed at the intersection of the annular reinforcement rib 3, the transverse reinforcement rib 4 and the longitudinal reinforcement rib 5. The transverse slot 601 of the reinforcement hoop 6 is clamped on the transverse reinforcement rib 4, the longitudinal slot 602 is clamped on the longitudinal reinforcement rib 5, and the annular slot 603 is clamped on the front of the annular reinforcement rib 3. At the connection bends 301 at the rear two ends, adjust the position of the reinforcement hoop 6 so that it fits tightly against each reinforcement rib, and then use bolts or other fastening methods to firmly fix the reinforcement hoop 6 to ensure the stability of the reinforced structure. After completing the installation of the above components, conduct a comprehensive inspection of the entire floor structure to ensure that the installation positions of each component are accurate and the connections are firm. Use a concrete pump truck to transport concrete to the pouring site, and pour concrete from one end to the other, in layers and sections. During the pouring process, use a vibrator to vibrate the concrete to make it dense, to avoid quality problems such as honeycombs and rough surfaces. When vibrating, be careful not to let the vibrator touch the composite tube core 1, reinforcement ribs and other components to prevent them from shifting or deforming, and control the pouring speed and height of the concrete.To prevent the composite tube core 1 from floating or shifting due to excessively fast or high concrete pouring, a dedicated person should be assigned to monitor the floor structure during the concrete pouring process.

[0065] The above description is merely an exemplary embodiment of the present invention and is not intended to limit the scope of protection of the present invention. The scope of protection of the present invention is determined by the appended claims.

Claims

1. A reinforced concrete cast-in-place large-span tubular core floor slab, characterized in that: The invention comprises a composite tube core (1); an annular reinforcing rib (3) is arranged around the top of the composite tube core (1); a supporting crossbeam (2) is inserted into the bottom of the composite tube core (1); the bottom of the supporting crossbeam (2) is connected to a bottom plate (7) via a connecting bolt (8); transverse reinforcing ribs (4) are provided on the front and rear sides of the supporting crossbeam (2); longitudinal reinforcing ribs (5) are inserted into the interior of the supporting crossbeam (2) at equal intervals; and reinforcing hoop (6) is installed at the intersection of the annular reinforcing rib (3), the transverse reinforcing rib (4) and the longitudinal reinforcing rib (5).

2. A reinforced concrete cast-in-place large-span tubular core floor slab as claimed in claim 1, characterized in that: The composite tube core (1) is a hollow structure with an elliptical cross-section. Positioning slots (101) are provided at equal distances on the top arc-shaped outer wall of the composite tube core (1). A hollow cylindrical reinforcing support tube (102) is installed in the hollow interior of the composite tube core (1). Rectangular connection slots (103) are provided at equal distances on the bottom of the composite tube core (1).

3. A reinforced concrete cast-in-place large-span tubular core floor slab as claimed in claim 1, characterized in that: The composite tube core (1) is made of a mixture of thin-wall plastic and fiber-reinforced composite material.

4. The reinforced concrete cast-in-place large-span tubular core floor slab according to claim 1, characterized in that: The cross section of the support beam (2) is in the shape of an "I" character. Positioning blocks (201) are installed at equal distances in the middle of the top end surface of the support beam (2). The positioning blocks (201) are plugged into a connection slot (103) provided on the bottom end surface of the composite tube core (1). The top end of the positioning block (201) is arc-shaped and fits on the top inner wall of the reinforcing support tube (102) of the composite tube core (1). Circular reinforcing rib through-holes (202) are provided in the front and rear side walls of the main body of the support beam (2) between adjacent positioning blocks (201). Longitudinal reinforcing rib through-holes (5) are inserted and connected in the reinforcing rib through-holes (202).

5. The reinforced concrete cast-in-place large-span tubular core floor slab according to claim 1, characterized in that: The main body of the annular reinforcing rib (3) is in an "n" shape, and the front and rear ends of the annular reinforcing rib (3) are provided with upwardly curved connecting bends (301). The bottom of the main body of the annular reinforcing rib (3) is clamped in the alignment clamping groove (101) on the outer side wall of the top of the composite tube core (1), and the connecting bends (301) at the front and rear ends of the annular reinforcing rib (3) surround the bottom of the transverse reinforcing ribs (4) on the front and rear sides of the supporting beam (2).

6. The reinforced concrete cast-in-place large-span tubular core floor slab according to claim 1, characterized in that: The bottoms of the left and right side walls of the reinforcement hoop (6) are provided with transverse slots (601), which are clamped onto the transverse reinforcement rib (4); the right sides of the front and rear side walls of the reinforcement hoop (6) are provided with longitudinal slots (602), which are clamped onto the longitudinal reinforcement rib (5); and the left side wall of the reinforcement hoop (6) is provided with an annular slot (603), which is clamped onto the connecting bends (301) at the front and rear ends of the annular reinforcement rib (3).

7. The reinforced concrete cast-in-place large-span tubular core floor slab according to claim 1, characterized in that: Alignment rods (701) are installed at equal distances at the top end surface of the bottom plate (7) and the corresponding bottom of the supporting beam (2); connecting bolts (8) are installed in the end surface of the bottom plate (7) between the connected alignment rods (701); the top end of the connecting bolts (8) is threadedly connected to the bottom end surface of the supporting beam (2).

8. The reinforced concrete cast-in-place large-span tubular core floor slab according to claim 1, characterized in that: The annular reinforcement ribs (3), transverse reinforcement ribs (4), longitudinal reinforcement ribs (5) and reinforcement hoop (6) together form a reinforcement structure, and the transverse reinforcement ribs (4) and longitudinal reinforcement ribs (5) are mutually interwoven to form a stable steel mesh structure.

9. The reinforced concrete cast-in-place large-span tubular core floor slab according to claim 1, characterized in that: The upper surface of the bottom plate (7) is adhered with an anti-cracking layer, which is composed of a mixed product of fiber concrete and polymer mortar.

10. The construction process of a reinforced concrete cast-in-place large-span tubular core floor slab as claimed in claim 1, characterized in that: The following steps are involved: 1). First, hoist the support beam (2) to the designated location, use a level and a total station to accurately level and position it, ensuring that the horizontality and verticality of the support beam (2) meet the design requirements, and then preliminarily position the bottom plate (7) with the corresponding position of the bottom of the support beam (2) through the alignment rod (701); 2) Use the connecting bolts (8) to fasten the bottom plate (7) and the supporting beam (2). Tighten the connecting bolts (8) to ensure that the connection is firm and the bottom plate (7) and the supporting beam (2) fit tightly together. 3) Then, the longitudinal reinforcement ribs (5) are sequentially inserted into the reinforcement rib holes (202) of the front and rear side walls of the support beam (2), ensuring that the length of the longitudinal reinforcement ribs (5) meets the design requirements and the length of the two ends extending out of the support beam (2) meets the anchoring requirements. The longitudinal reinforcement ribs (5) are fixed and can be connected to the support beam (2) by tying or welding; 4) Then install transverse reinforcement ribs (4) on the front and rear sides of the support beam (2), so that the transverse reinforcement ribs (4) and the longitudinal reinforcement ribs (5) are perpendicularly interwoven to form a steel mesh structure. At the intersection, the transverse reinforcement ribs (4) and the longitudinal reinforcement ribs (5) are firmly connected by tying or welding to ensure the integrity and stability of the steel mesh; 5) Lift the composite tube core (1) to the installation position, align the connection slot (103) at the bottom of the composite tube core (1) with the alignment block 201 at the top of the support beam (2), slowly lower the composite tube core (1), insert the alignment block (201) into the connection slot (103), ensure that the composite tube core (1) is tightly connected to the support beam (2), and the position of the composite tube core (1) is accurate, check the direction and position of the alignment slot (101) on the arc-shaped outer wall at the top of the composite tube core (1), and prepare for the subsequent installation of the annular reinforcement rib (3); 6) Clamp the bottom of the annular reinforcement rib (3) into the alignment slot (101) on the top outer wall of the composite tube core (1), and at the same time, wrap the connection bends 301 at the front and rear ends of the annular reinforcement rib (3) around the bottom of the transverse reinforcement rib (4) on the front and rear sides of the support beam (2), and use welding to fix the annular reinforcement rib (3) with the composite tube core (1) and the transverse reinforcement rib (4) to ensure a firm connection; 7) Install the reinforcement hoop (6) at the intersection of the annular reinforcement rib (3), the transverse reinforcement rib (4) and the longitudinal reinforcement rib (5), clamp the transverse slot (601) of the reinforcement hoop (6) on the transverse reinforcement rib (4), clamp the longitudinal slot (602) on the longitudinal reinforcement rib (5), and clamp the annular slot (603) on the connecting bend (301) at the front and rear ends of the annular reinforcement rib (3). Adjust the position of the reinforcement hoop (6) so that it fits tightly with each reinforcement rib to ensure the stability of the reinforcement structure; 8). After completing the installation of the above components, conduct a comprehensive inspection of the entire floor structure to ensure that the installation positions of each component are accurate and the connections are firm. Use a concrete pump truck to transport concrete to the pouring site and pour the concrete from one end to the other in layers and sections. During the pouring process, use a vibrator to vibrate and compact the concrete to avoid quality problems such as honeycombs and rough surfaces. When vibrating, be careful not to let the vibrator touch the composite tube core (1), reinforcements and other components to prevent them from shifting or deforming. Control the pouring speed and height of the concrete to avoid pouring the concrete too quickly or too high, which may cause the composite tube core (1) to float or shift. During the concrete pouring process, arrange a dedicated person to monitor the floor structure.

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