Prefabricated hollow composite floor slab structure applied to the construction of urban railway station buildings

Abstract

This utility model provides a prefabricated hollow composite floor slab structure for the construction of urban railway stations, belonging to the field of building construction technology. It includes structural columns, vertical composite beams installed on one side of the structural columns, a leveling structure located inside the horizontal prefabricated corbels, a concrete layer poured on top of the prefabricated hollow slab, and a positioning structure located outside the structural reinforcement. This utility model reduces on-site wet work, requiring only localized formwork at joints, thus reducing the labor intensity and construction risks for workers, improving construction efficiency, and accelerating construction speed. Compared with traditional hollow prefabricated slab structures, the bonding and integration effect of the cast-in-place concrete layer results in superior overall structure integrity, better sound insulation, and significantly improved overall seismic performance, better meeting the comprehensive requirements of subway depot construction for floor slab performance.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, specifically to a prefabricated hollow composite floor slab structure applied to the construction of urban railway station buildings. Background Technology

[0002] Because railway station buildings need to accommodate a large number of passengers, install equipment, and accommodate various functions, there are strict requirements for the load-bearing capacity, stability, and spatial adaptability of the floor structure. Therefore, a dedicated floor structure is established for railway station buildings to support the loads of different functional spaces such as waiting areas and commercial service areas within the station building, ensuring the safety of personnel passage and the stable operation of equipment. At the same time, it meets the spatial requirements of large spans and flexible partitioning of the station building, providing a solid structural foundation for the realization of the overall functions of the station.

[0003] A Chinese patent with publication number CN205894290U discloses a prefabricated reinforced concrete beam-slab structure system with a cast-in-place layer in building structures. The system includes composite beams, composite slabs, steel mesh, a cast-in-place concrete composite layer, and beam negative reinforcement. The composite beams are precast reinforced concrete beams with cantilevered tongues on both sides of the upper part of the beam. The composite slabs are horizontally arranged and are also precast reinforced concrete slabs. Cover-plate tongues are provided on both sides of the composite slab at positions corresponding to the cantilevered tongues, overlapping the cantilevered tongues. The steel mesh and beam negative reinforcement are horizontally arranged above the composite beams and slabs. The steel mesh is tied to the corresponding reinforcement in the composite beams and slabs, and the beam negative reinforcement is tied to the corresponding reinforcement in the composite beams. After the steel mesh and beam negative reinforcement are arranged, concrete is poured to form the cast-in-place concrete composite layer. This structural system has good integrity and load-bearing performance, and can improve overall integrity and seismic performance.

[0004] The aforementioned patent still has the following shortcomings: Traditional subway depot floor slab construction mainly adopts the cast-in-place method, which has many drawbacks: the amount of on-site wet work is large, requiring the construction of a large number of formwork, which consumes a lot of manpower and time; the construction progress is easily affected by the weather; during the construction process, the quality control of concrete pouring, vibration and curing is difficult, and quality problems such as honeycomb, pitting and cracks are prone to occur, affecting the durability and safety of the floor slab structure. On the other hand, the traditional hollow precast concrete slab structure lacks integrity, and its structural stability is poor when subjected to the dynamic load generated by the frequent operation of subway vehicles and in extreme situations such as earthquakes, which poses safety hazards. At the same time, the splicing gaps between precast slabs can easily become channels for noise transmission, resulting in poor sound insulation and affecting the durability of the depot structure and the working environment of the staff. Utility Model Content

[0005] The utility model provides an assembled hollow composite floor slab structure applied to the construction of municipal railway station buildings, which solves the problems mentioned in the above background art that the traditional cast-in-place construction method has many wet operations and slow construction speed, and the traditional hollow precast slab structure has poor integrity, sound insulation effect and seismic performance.

[0006] In order to solve the above technical problems, the technical solution of the utility model is as follows: An embodiment of the utility model provides an assembled hollow composite floor slab structure applied to the construction of municipal railway station buildings, comprising a structural column, and further comprising: a vertical composite beam installed on one side of the structural column, wherein a vertical precast corbel is poured on one side of the vertical composite beam; a horizontal composite beam installed beside the structural column, wherein a horizontal precast corbel is poured on one side of the horizontal composite beam; a leveling structure arranged inside the horizontal precast corbel; a precast hollow slab laid on the top of the leveling structure, wherein hollow holes are formed inside the precast hollow slab, and structural steel bars are inserted between two adjacent groups of the precast hollow slabs; a concrete layer poured on the top of the precast hollow slab, wherein longitudinal stress steel bars and transverse stress steel bars are respectively inserted inside the concrete layer; a positioning structure arranged outside the structural steel bars and used for fixing the position of the structural steel bars.

[0007] Through the above technical solution, the structural column is poured at the construction site, prefabricated vertical precast corbels and horizontal composite beams are installed at the floor position of the structural column, precast hollow slabs are transported to the construction site and installed one by one through hoisting equipment, so that the four sides of the precast hollow slabs are supported on the vertical precast corbels and horizontal precast corbels, and the leveling structure is used to adjust the precast hollow slabs to make multiple groups of precast hollow slabs flat. Structural steel bars are arranged between two groups of precast hollow slabs, and the positioning structure is used to lock the position of the structural steel bars. Then, the transverse stress steel bars and longitudinal stress steel bars are bound, and the ends of the transverse stress steel bars and longitudinal stress steel bars are anchored into the upper cast-in-place layers of the vertical composite beams and horizontal composite beams. After completion, the concrete layer is poured. Through the arrangement of vertical precast corbels and horizontal precast corbels, a supporting foundation is provided for the subsequent laying of precast hollow slabs. Through the hollow holes, the overall weight of the floor slab is reduced to a certain extent while the bearing capacity of the floor slab structure is guaranteed. Through the staggered distribution of the longitudinal stress steel bars and transverse stress steel bars, the structural strength of the concrete layer is enhanced, thereby providing reliable structural support for the floor slab of municipal railway station buildings.

[0008] Further, both the longitudinal stress steel bars and the transverse stress steel bars have an inverted U-shaped structure, and the longitudinal stress steel bars and the transverse stress steel bars are distributed in a staggered manner inside the concrete layer.

[0009] Through the above technical solution, the longitudinal stressed steel bars and transverse stressed steel bars with the inverted "冖"-shaped structure are staggered in the concrete layer, which can more evenly disperse the load borne by the floor slab, enhance the crack resistance and structural stability of the concrete layer, and provide reliable stress support for the floor slab of the municipal railway station building.

[0010] Further, a plurality of groups of said hollow holes are arranged inside the prefabricated hollow slab, and the plurality of groups of hollow holes are distributed at equal intervals inside the prefabricated hollow slab.

[0011] Through the above technical solution, a plurality of groups of hollow holes distributed at equal intervals form reasonable cavities in the prefabricated hollow slab. While ensuring that the bearing capacity of the prefabricated hollow slab itself is sufficient to support the operation requirements of the station building, the material consumption of the prefabricated hollow slab is effectively reduced, and the overall weight of the floor slab is reduced to a certain extent.

[0012] Further, said leveling structure comprises a movable slot opened inside the top end of a transverse prefabricated corbel, a screw sleeve is fixed at the top end inside the transverse prefabricated corbel, an adjusting bolt is threadedly connected inside the screw sleeve, a support plate is rotatably connected to the top end of the adjusting bolt, a blocking piece is fixed on one side of the support plate, a storage slot is opened inside the bottom end of the transverse prefabricated corbel, a vertical sliding structure is formed between the support plate and the movable slot, and the width of the blocking piece is equal to the width of the prefabricated hollow slab.

[0013] Through the above technical solution, by simultaneously rotating two groups of adjusting bolts, the support plate is driven to move in the vertical direction in the movable slot, so that the support plate adjusts the height of the prefabricated hollow slab. After leveling, concrete is poured into the movable slot, and the blocking piece will block the concrete from overflowing to one side of the prefabricated hollow slab, ensuring that the concrete is only filled inside the movable slot, which guarantees the accuracy of concrete filling and the integrity of the internal structure of the movable slot to a certain extent. The support plate can slide vertically in the movable slot, which is convenient for adjusting the height of the prefabricated hollow slab to achieve leveling. The width of the blocking piece is equal to that of the prefabricated hollow slab, which can accurately block the overflow of concrete when the movable slot is poured with concrete, ensuring that the concrete only fills the movable slot.

[0014] Further, the adjusting bolt passes through the screw sleeve and extends into the movable slot to connect with the support plate.

[0015] Through the above technical solution, when rotating the adjusting bolt, the threaded engagement with the screw sleeve can drive the support plate to lift stably, providing a reliable transmission structure for height adjustment of the prefabricated hollow slab, and ensuring that the leveling operation is accurate and convenient.

[0016] Furthermore, the positioning structure includes a connecting sleeve fitted on the outside of the structural steel bar, a locking bolt connected to the internal thread of the top of the connecting sleeve, guide rods fixed on both sides of the connecting sleeve, a top plate slidably connected to the end of the guide rod away from the connecting sleeve, a compression spring fixed between the top plate and the connecting sleeve, and grooves matching the top plate opened inside both sides of the precast hollow slab.

[0017] The above technical solution uses locking bolts to connect and fix the connecting sleeve to the structural steel reinforcement. A compression spring pushes the top plate into the groove to fix the position of the structural steel reinforcement, so that the structural steel reinforcement is located in the middle of the gap of the precast hollow slab, which enhances the overall stability of the floor slab structure when the concrete layer is poured later.

[0018] Furthermore, the locking bolt extends into the interior of the connecting sleeve and contacts the structural reinforcing bars, and the top plate is symmetrically distributed along the vertical center line of the connecting sleeve.

[0019] Through the above technical solution, the locking bolts can initially fix the position of the connecting sleeve by contacting the structural steel bars. The symmetrically distributed top plates are inserted into the grooves under the action of the compression springs, which can stably connect the positioning structure and the precast hollow slab, ensuring that the structural steel bars are in the middle of the gap and enhancing the overall stability of the floor slab.

[0020] The above-described solution of this utility model has at least the following beneficial effects: This invention utilizes prefabricated hollow slabs, which are manufactured in a factory. On-site installation only requires hoisting, laying, and formwork installation at the joints. Compared to traditional cast-in-place methods, this significantly reduces wet work, lowering the labor intensity and risks for construction workers, reducing noise and dust pollution, meeting green construction requirements, and shortening construction time. It eliminates the need for extensive formwork construction and rebar tying; only joint treatment and concrete pouring are required after the prefabricated hollow slabs are installed. This shortens the construction cycle and facilitates the early opening of the subway. Furthermore, the concrete layer tightly integrates the prefabricated hollow slabs with the cast-in-place concrete, ensuring coordinated stress distribution and overcoming the lack of integrity in traditional hollow prefabricated slabs. Vehicle dynamic loads can be transferred as a whole, and the slabs can better resist seismic forces, improving structural stability and earthquake resistance. Additionally, the concrete layer fills the gaps between the prefabricated hollow slabs, forming a continuous sound barrier, and the hollow holes also contribute to sound insulation. Compared to traditional hollow prefabricated slabs, the sound insulation effect is improved, creating a better acoustic environment for the depot and surrounding areas, and better meeting the comprehensive performance requirements of the subway depot for the floor slabs. This utility model, by simultaneously rotating two sets of adjusting bolts, allows the support plate to adjust the height of the precast hollow slab. After leveling, concrete is poured into the interior of the movable groove to ensure structural strength. This achieves the precast hollow slab leveling function of the device, enabling multiple sets of precast hollow slabs to remain flat and consistent, avoiding the impact of slab height differences on subsequent construction quality, and laying a good foundation for subsequent concrete layer pouring, ensuring the flatness and density of the overall floor slab structure. This invention uses locking bolts to connect and fix the connecting sleeve to the structural steel reinforcement. A compression spring pushes the top plate into the groove to fix the position of the structural steel reinforcement, so that the structural steel reinforcement is located in the middle of the gap in the precast hollow slab. This realizes the structural steel reinforcement positioning function of this device, which can ensure that the structural steel reinforcement does not shift during the subsequent concrete pouring process, so that the steel reinforcement is evenly stressed to improve the overall structural strength of the floor slab. At the same time, it simplifies the operation steps of steel reinforcement positioning during construction and improves construction efficiency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the overall three-dimensional cross-sectional structure of this utility model; Figure 3 A three-dimensional structural diagram of the leveling structure provided by this utility model; Figure 4 A three-dimensional cross-sectional structural diagram of the leveling structure provided by this utility model; Figure 5 This is a three-dimensional cross-sectional structural diagram of the positioning structure provided by this utility model.

[0022] Explanation of reference numerals in the attached figures: 1. Structural column; 2. Vertical composite beam; 3. Vertical precast corbel; 4. Horizontal composite beam; 5. Horizontal precast corbel; 6. Precast hollow slab; 7. Hollow hole; 8. Structural reinforcement; 9. Longitudinal reinforcement; 10. Horizontal reinforcement; 11. Concrete layer; 12. Leveling structure; 1201. Baffle; 1202. Adjusting bolt; 1203. Movable groove; 1204. Support plate; 1205. Screw sleeve; 1206. Storage groove; 13. Positioning structure; 1301. Connecting sleeve; 1302. Locking bolt; 1303. Compression spring; 1304. Guide rod; 1305. Top plate; 1306. Groove. Detailed Implementation

[0023] Exemplary embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present utility model are shown in the accompanying drawings, it should be understood that the present utility model may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present utility model and to fully convey the scope of the present utility model to those skilled in the art.

[0024] As Figures 1 to 5 shown, an embodiment of the present utility model provides an assembled hollow composite floor slab structure applied to the construction of municipal railway station buildings, comprising a structural column 1, and further comprising: vertical composite beams 2 installed on one side of the structural column 1, and vertical precast corbels 3 are poured on one side of the vertical composite beams 2; horizontal composite beams 4 installed beside the structural column 1, and horizontal precast corbels 5 are poured on one side of the horizontal composite beams 4; a leveling structure 12 arranged inside the horizontal precast corbel 5; precast hollow slabs 6 laid on the top of the leveling structure 12, wherein hollow holes 7 are opened inside the precast hollow slabs 6, and structural steel bars 8 are inserted between two adjacent groups of precast hollow slabs 6; a concrete layer 11 poured on the top of the precast hollow slabs 6, wherein longitudinal stressed steel bars 9 and transverse stressed steel bars 10 are respectively inserted inside the concrete layer 11; a positioning structure 13 arranged outside the structural steel bar 8 for fixing the position of the structural steel bar 8; both the longitudinal stressed steel bars 9 and the transverse stressed steel bars 10 are in an inverted U-shaped structure, and the longitudinal stressed steel bars 9 and the transverse stressed steel bars 10 are distributed in a staggered manner inside the concrete layer 11; a plurality of groups of hollow holes 7 are arranged inside the precast hollow slab 6, and the plurality of groups of hollow holes 7 are distributed at equal intervals inside the precast hollow slab 6.

[0025] In this embodiment of the utility model, firstly, structural columns 1 are poured at the construction site, and prefabricated vertical prefabricated corbels 3 and transverse composite beams 4 are installed at the floor slab positions of the structural columns 1. Prefabricated hollow slabs 6 are transported to the construction site, and each prefabricated hollow slab 6 is installed one by one using hoisting equipment, with the perimeter of the prefabricated hollow slab 6 supported by the vertical prefabricated corbels 3 and transverse prefabricated corbels 5. A leveling structure 12 is used to adjust the prefabricated hollow slabs 6, ensuring flatness between multiple sets of prefabricated hollow slabs 6. Structural reinforcing bars 8 are placed between two sets of prefabricated hollow slabs 6, and a positioning structure 13 is used to lock the position of the structural reinforcing bars 8. Subsequently, the transverse reinforcing bars 1 are tied. The longitudinal reinforcing bars 9 and the transverse reinforcing bars 10 are anchored into the upper cast-in-place layer of the vertical composite beam 2 and the transverse composite beam 4. After completion, the concrete layer 11 is poured. The vertical precast corbels 3 and transverse precast corbels 5 provide a supporting foundation for the subsequent laying of the precast hollow slab 6. The hollow holes 7 ensure the load-bearing capacity of the floor slab structure while reducing the overall weight of the floor slab to a certain extent. The staggered distribution of the longitudinal reinforcing bars 9 and the transverse reinforcing bars 10 enhances the structural strength of the concrete layer 11, thereby providing reliable structural support for the floor slab of the urban railway station building.

[0026] like Figures 1 to 4 As shown, the leveling structure 12 includes a movable groove 1203 opened inside the top of the transverse precast bracket 5. A threaded sleeve 1205 is fixed to the top of the transverse precast bracket 5. An adjusting bolt 1202 is threadedly connected inside the threaded sleeve 1205. A support plate 1204 is rotatably connected to the top of the adjusting bolt 1202. A baffle 1201 is fixed to one side of the support plate 1204. A storage groove 1206 is opened inside the bottom of the transverse precast bracket 5. A sliding structure in the vertical direction is formed between the support plate 1204 and the movable groove 1203. The width of the baffle 1201 is equal to the width of the precast hollow plate 6. The adjusting bolt 1202 passes through the threaded sleeve 1205 and extends into the interior of the movable groove 1203 and is connected to the support plate 1204.

[0027] In this embodiment of the utility model, when the precast hollow slab 6 needs to be leveled, by simultaneously rotating two sets of adjusting bolts 1202, the adjusting bolts 1202 engage with the threads of the threaded sleeve 1205, thereby driving the support plate 1204 to move vertically within the movable groove 1203, thereby adjusting the height of the top of the support plate 1204 and adjusting the height of the precast hollow slab 6. After the leveling work is completed, concrete is poured into the interior of the movable groove 1203. At this time, the baffle 1201 will prevent the concrete from overflowing to one side of the precast hollow slab 6, ensuring that the concrete is only filled inside the movable groove 1203, which to a certain extent guarantees the accuracy of concrete filling and the integrity of the internal structure of the movable groove 1203.

[0028] like Figure 5As shown, the positioning structure 13 includes a connecting sleeve 1301 sleeved on the outside of the structural steel bar 8. A locking bolt 1302 is threadedly connected to the top of the connecting sleeve 1301. Guide rods 1304 are fixed on both sides of the connecting sleeve 1301. A top plate 1305 is slidably connected to the end of the guide rod 1304 away from the connecting sleeve 1301. A compression spring 1303 is fixed between the top plate 1305 and the connecting sleeve 1301. Grooves 1306 matching the top plate 1305 are opened inside both sides of the precast hollow slab 6. The locking bolt 1302 extends into the interior of the connecting sleeve 1301 and contacts the structural steel bar 8. The top plate 1305 is symmetrically distributed on the vertical center line of the connecting sleeve 1301.

[0029] In this embodiment of the invention, the connecting sleeve 1301 is first fitted onto the outside of the structural steel bar 8. Then, the locking bolt 1302 is rotated to bring it into contact with the structural steel bar 8, thus initially fixing the connecting sleeve 1301 onto the structural steel bar 8. The two sets of top plates 1305 are then pressed, compressing the compression spring 1303. Simultaneously, the structural steel bar 8 with the connecting sleeve 1301 fitted onto it, along with the two sets of top plates 1305, is inserted into the gap between two adjacent sets of precast hollow slabs 6. When the structural steel bar 8 and the connecting sleeve 1301 are fully inserted into the gap... Then, release the pressure on the top plate 1305, causing the compression spring 1303 to release its elastic restoring force, pushing the top plate 1305 along the guide rod 1304 away from the connecting sleeve 1301 until the top plate 1305 is inserted into the grooves 1306 opened inside both sides of the precast hollow slab 6, thereby realizing the connection and fixation between the positioning structure 13 and the precast hollow slab 6, fixing the position of the structural steel bar 8, so that the structural steel bar 8 is located in the middle position of the gap of the precast hollow slab 6, so as to enhance the overall firmness of the floor slab structure when the concrete layer 11 is poured later.

[0030] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A prefabricated hollow composite floor slab structure for use in the construction of urban railway station buildings, comprising structural columns (1), characterized in that, further comprising: vertical superimposed beam (2), installed on one side of a structural column (1), wherein a vertical precast corbel (3) is poured on one side of the vertical superimposed beam (2); horizontal superimposed beam (4), installed beside the structural column (1), wherein a horizontal precast corbel (5) is poured on one side of the horizontal superimposed beam (4); leveling structure (12), arranged inside the horizontal precast corbel (5); precast hollow slab (6), laid on the top end of the leveling structure (12), wherein hollow holes (7) are opened inside the precast hollow slab (6), and a construction steel bar (8) is inserted between two adjacent groups of the precast hollow slabs (6); concrete layer (11), poured on the top end of the precast hollow slab (6), wherein a longitudinal stress steel bar (9) and a transverse stress steel bar (10) are respectively inserted inside the concrete layer (11); positioning structure (13), arranged outside the construction steel bar (8) and configured to fix the position of the construction steel bar (8).

2. The prefabricated hollow composite floor slab structure applied to the construction of urban railway station buildings according to claim 1, characterized in that, Both the longitudinal stress steel bar (9) and the transverse stress steel bar (10) are in an inverted U-shaped structure, and the longitudinal stress steel bar (9) and the transverse stress steel bar (10) are distributed in a staggered manner inside the concrete layer (11).

3. The prefabricated hollow composite floor slab structure applied to the construction of urban railway station buildings according to claim 1, characterized in that, A plurality of groups of the hollow holes (7) are arranged inside the precast hollow slab (6), and the plurality of groups of hollow holes (7) are distributed at equal intervals inside the precast hollow slab (6).

4. The prefabricated hollow composite floor slab structure applied to the construction of urban railway station buildings according to claim 1, characterized in that, The leveling structure (12) comprises a movable groove (1203) opened inside the top end of the horizontal precast corbel (5), a screw sleeve (1205) is fixed at the top end inside the horizontal precast corbel (5), an adjusting bolt (1202) is threadedly connected inside the screw sleeve (1205), a supporting plate (1204) is rotatably connected to the top end of the adjusting bolt (1202), a blocking piece (1201) is fixed on one side of the supporting plate (1204), an accommodation groove (1206) is opened inside the bottom end of the horizontal precast corbel (5), the supporting plate (1204) and the movable groove (1203) form a vertical sliding structure, and the width of the blocking piece (1201) is equal to the width of the precast hollow slab (6).

5. The prefabricated hollow composite floor slab structure for use in the construction of urban railway station buildings according to claim 4, characterized in that, The adjusting bolt (1202) passes through the screw sleeve (1205), extends into the movable groove (1203) and is connected to the supporting plate (1204).

6. The prefabricated hollow composite floor slab structure applied to the construction of urban railway station buildings according to claim 1, characterized in that, The positioning structure (13) comprises a connecting sleeve (1301) sleeved outside the construction steel bar (8), a locking bolt (1302) is threadedly connected inside the top end of the connecting sleeve (1301), guide rods (1304) are fixed on both sides of the connecting sleeve (1301), a top plate (1305) is slidably connected to one end of the guide rods (1304) away from the connecting sleeve (1301), a compression spring (1303) is fixed between the top plate (1305) and the connecting sleeve (1301), and grooves (1306) matched with the top plate (1305) are opened inside both sides of the precast hollow slab (6).

7. The prefabricated hollow composite floor slab structure for use in the construction of urban railway station buildings according to claim 6, characterized in that, The locking bolt (1302) extends into the interior of the connecting sleeve (1301) and contacts the structural steel bar (8), and the top plate (1305) is symmetrically distributed on the vertical center line of the connecting sleeve (1301).

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