A prefabricated assembled subway station

Abstract

The present application relates to the technical field of metro station assembly type construction, and particularly relates to a prefabricated assembly type metro station component connecting structure, which comprises a plurality of square frames, the square frames are spliced with each other to form a metro station main body; a support beam is arranged at the upper end of a lower stand column, and the support beams of any two adjacent lower stand columns are connected with each other; a group of cross beams are distributed in parallel along the length direction of the metro station main body to form a metro intermediate layer, each group of cross beams comprises two splicing columns, a positioning piece is arranged between the splicing columns, a wedge-shaped structure matched with the splicing columns is arranged between the two sides of the positioning piece and the splicing columns, a square table extending to the support beam is arranged in the middle of the positioning piece, and a notch corresponding to the square table is arranged at the end of the splicing column; through the wedge-shaped fitting structure between the positioning piece and the splicing column and the clamping limiting structure of the square table and the notch, a multiple positioning limiting system is formed, and the problems of deviation and misplacement in the splicing column assembly process can be effectively eliminated.

Description

Technical Field

[0001] This invention belongs to the technical field of prefabricated construction of subway stations, and specifically relates to a prefabricated subway station. Background Technology

[0002] Precast assembly subway station construction technology, with its advantages of short construction cycle, minimal on-site work, less environmental pollution, and controllable component quality, is gradually replacing traditional cast-in-place construction methods and has become one of the mainstream directions in subway station construction. Precast assembly subway stations are mainly formed by assembling various precast components. The stability of the connection structure between components, the accuracy of positioning, and the ease of assembly directly determine the overall structural strength, waterproof performance, and construction efficiency of the subway station. Currently, existing precast assembly subway stations still have many technical defects. The positioning accuracy of component splicing in most stations is poor, and component displacement and misalignment are prone to occur during assembly, greatly affecting the overall flatness and structural stability of the station.

[0003] Therefore, there is a need to provide an improved technical solution that addresses the shortcomings of the existing technology. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art. This invention provides a prefabricated assembled subway station.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A prefabricated modular subway station includes multiple square frames, which are spliced ​​together to form the main body of the subway station. The lower end of the lower column is supported in the middle of the base plate of the square frame. Multiple lower columns are evenly distributed along the length of the main body of the subway station. Support beams are provided at the upper end of the lower columns, and the support beams of any two adjacent lower columns are connected to each other. Multiple sets of crossbeams are arranged in parallel along the length of the main body of the subway station to form the subway interlayer. Each set of crossbeams includes two splicing columns. The ends of the two splicing columns that are close to each other are respectively connected to the two sides of the support beam, and the ends of the two splicing columns that are far apart from each other are respectively connected to the middle of the side plate of the square frame. Positioning components are provided between the splicing columns. The two sides of the positioning components and the splicing columns are provided with matching wedge-shaped structures. A square platform extending downward toward the support beam is provided in the middle of the positioning components. The ends of the splicing columns are provided with notches corresponding to the square platform. The lower end of the upper column is supported on the positioning component, and the upper end is supported on the top plate of the square frame. Multiple upper columns are evenly distributed along the length of the main body of the subway station.

[0006] Preferably, the widths of the positioning component and the splicing column are matched in the length direction of the subway station body; a corresponding positioning component's threaded sleeve is pre-embedded above the support beam, and the positioning bolt passes downward through the positioning component and is threaded onto the threaded sleeve.

[0007] Preferably, the positioning component has assembly holes for corresponding positioning bolts, and the bottom of the upper column has a positioning post with corresponding assembly holes pre-embedded.

[0008] Preferably, the inner wall of the side plate of the square frame is provided with a first splicing position corresponding to the splicing column. The first splicing position is a first protrusion protruding into the subway station. The splicing column is cast-in-place connected to the first protrusion.

[0009] Preferably, the ends of the support beams are reserved with steel bar joints, and the steel bar joints between two adjacent support beams are welded and fixed and then connected by cast-in-place.

[0010] Preferably, the inner walls of the top and bottom plates of the square frame are provided with second splicing positions corresponding to the upper and lower columns, respectively; The second splicing position is a second protrusion protruding into the subway station. The second protrusion has a groove in the middle corresponding to the upper or lower column, and the adjacent upper or lower columns are connected into one piece by concrete pouring.

[0011] Preferably, the base of the subway station is cast with a foundation layer, the thickness of which is greater than the height of the second protrusion.

[0012] Preferably, one side of the square frame is provided with a splicing protrusion, and the other side of the square frame is provided with a splicing groove. Two adjacent square frames are spliced ​​together by corresponding splicing protrusions and splicing grooves.

[0013] Preferably, the top plate, bottom plate, and side plates of the square frame are independent prefabricated components; The top and bottom plates of the square frame are respectively provided with bends at both ends, and the ends of the bends are provided with mortises corresponding to the side plates. The ends of the side plates are provided with tenons that fit the mortises.

[0014] Beneficial effects: By using the wedge-shaped fitting structure between the positioning component and the splicing column, and the snap-fit ​​limiting structure between the square platform and the notch, a multi-positioning and limiting system is formed, which can effectively eliminate the offset and misalignment problems during the assembly of the splicing column; at the same time, the square frame adopts the splicing method of tenon and mortise joint and convex strip and splicing groove snap-fit, achieving all-round precise positioning from the whole to the parts, which greatly improves the overall assembly flatness and structural accuracy of the station. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. Wherein: Figure 1This is an assembly diagram of the subway station component connection structure provided in a specific embodiment of the present invention; Figure 2 This is a simplified structural diagram of the square frame in a specific embodiment of the present invention; Figure 3 This is a simplified assembly diagram of the crossbeam in a specific embodiment of the present invention.

[0016] In the diagram: 1. Top plate; 2. Side plate; 3. Bottom plate; 4. Lower column; 5. Upper column; 6. Splicing column; 7. Positioning component; 8. Support beam; 9. Foundation layer; 10. Splicing groove; 11. First boss; 12. Second boss; 13. Square platform; 14. Positioning bolt. Detailed Implementation

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0018] In the description of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and do not require the invention to be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. The terms "connected" and "linked" used in this invention should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0019] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0020] like Figures 1 to 3 As shown, a prefabricated modular subway station includes multiple modular prefabricated square frames. The multiple square frames are spliced ​​together along the length of the subway station to form a cuboid structure, which serves as the main body of the subway station and constitutes the station's outer enclosure and load-bearing structure.

[0021] The main body of the subway station has multiple lower columns 4, all evenly distributed along the length of the subway station. The bottom of each lower column 4 is vertically supported and fixed to the middle of the station floor slab 3, ensuring uniform load-bearing capacity. Each lower column 4 has a horizontally arranged support beam 8 integrally cast at its top, extending along the length of the subway station. The ends of the support beams 8 at the top of any two adjacent lower columns 4 are connected and fixed together, forming a middle-layer load-bearing support system. Multiple sets of crossbeams are distributed parallel and equidistantly along the length of the subway station, jointly forming the internal partition layer of the subway station, achieving layered division of the station's internal space. Each set of crossbeams includes two splicing columns 6, located on both sides of the support beam 8. The ends of the two splicing columns 6 that are closer to each other overlap the corresponding sides of the support beam 8, while the ends that are farther apart are fixedly connected to the middle of the side panel 2 of the square frame.

[0022] Positioning components 7 are assembled between the two sets of splicing columns 6. The left and right side walls of the positioning components 7 are provided with wedge-shaped structures that fit together tightly with the corresponding splicing column 6. The wedge-shaped structures are used to fit and limit the splicing column 6, so as to achieve precise alignment between the positioning component 7 and the splicing column 6 and effectively limit lateral displacement. The center of the positioning component 7 is integrally formed with a square platform 13 extending to the top surface of the support beam 8. The splicing column 6 has a notch that matches the size and shape of the square platform 13. The square platform 13 is engaged and embedded in the notch to form a double limiting structure in both vertical and longitudinal directions.

[0023] The top of the positioning component 7 is supported by an upper column 5. The bottom of the upper column 5 is fixedly supported on the upper surface of the positioning component 7. The top of the upper column 5 is vertically supported on the inner wall of the top plate 1 of the square frame. Multiple upper columns 5 are evenly arranged along the length of the main body of the subway station and are arranged vertically in correspondence with the lower columns 4 to form a vertical load-bearing system that runs through the upper and lower parts, and jointly bear the load of the station top plate 1 and the upper part.

[0024] In this embodiment, the width of the crossbeam along the length of the subway station body is adapted to the square frame. The widths of the positioning component 7 and the splicing column 6 along the length of the subway station body are also adapted. A threaded sleeve corresponding to the positioning component 7 is pre-embedded above the support beam 8. The positioning component 7 has a through hole in the middle. A threaded sleeve corresponding to the position and quantity of the positioning component 7 is pre-embedded and fixed on the top surface of the support beam 8. The threaded sleeve is embedded and fixed inside the support beam 8, and its end face is flush with the top surface of the support beam 8. A through assembly hole is vertically opened in the middle of the positioning component 7. After the positioning bolt 14 passes downward through the assembly hole of the positioning component 7, it is threadedly locked with the threaded sleeve inside the support beam 8. This achieves a detachable and fixed connection between the positioning component 7 and the support beam 8, which is convenient to assemble and has a firm connection, facilitating later inspection and maintenance.

[0025] The end of the positioning bolt 14 is provided with an internal hexagonal groove corresponding to the internal hexagonal wrench. The upper end of the assembly hole is provided with a stepped platform with an increased inner diameter corresponding to the upper end of the positioning bolt 14. After the positioning bolt 14 is tightened, there is a certain distance between the upper end of the positioning bolt 14 and the positioning part 7. The bottom of the upper column 5 is pre-embedded with a positioning post corresponding to the assembly hole. This positioning post can be inserted into the assembly hole, thereby improving the overall connection and structural strength between the upper column 5 and the positioning part 7.

[0026] In another optional embodiment, a splicing protrusion is integrally formed on one side of the square frame, and a splicing groove 10 is correspondingly provided on the other side. The cross-sectional shape and size of the splicing protrusion and the splicing groove 10 are adapted to each other. Two adjacent square frames can be quickly spliced ​​and limited by the interlocking of the splicing protrusion and the splicing groove 10, which effectively limits the lateral and longitudinal offset between the square frames, improves the splicing accuracy of the frames and the overall enclosure sealing performance.

[0027] Furthermore, the square frame adopts a modular prefabricated structure, which is assembled from four independent prefabricated components: a top plate 1, a bottom plate 3, and two side plates 2. Both ends of the top plate 1 and the bottom plate 3 are integrally bent into elbow structures, and the ends of the elbows are provided with mortise grooves. The upper and lower ends of the side plates 2 are integrally formed with tenons that precisely match the mortise grooves. The top plate 1 and the bottom plate 3 are mortised and tenoned with the tenons of the side plates 2 through the mortise grooves, so as to realize the rapid assembly and forming of each component of the square frame. The mortise and tenon structure has precise positioning and strong load-bearing capacity, which can effectively ensure the structural integrity of the square frame.

[0028] Furthermore, the inner wall of the side panel 2 of the square frame is provided with a first splicing position corresponding to the end of the splicing column 6. The first splicing position is a first protrusion 11 protruding into the subway station. The first protrusion 11 and the side panel 2 of the square frame are an integral prefabricated structure. The outer end of the splicing column 6 overlaps and fits onto the upper surface of the first protrusion 11. The splicing column 6 and the first protrusion 11 are cast into one piece by on-site cast-in-place concrete to achieve a rigid connection and improve the stability and load-bearing capacity of the lateral connection.

[0029] The two ends of the support beam 8 have exposed steel bar joints. When two adjacent support beams 8 are joined together, the corresponding steel bar joints are overlapped and fixed by welding. Then, the adjacent support beams 8 are formed into an integral structure by on-site cast-in-place concrete, eliminating splicing gaps and improving the overall continuity and deformation resistance of the middle layer support system.

[0030] As a preferred embodiment, the inner walls of the top plate 1 and the bottom plate 3 of the square frame are provided with second splicing positions. The second splicing position on the inner side of the top plate 1 corresponds to the upper column 5, and the second splicing position on the inner side of the bottom plate 3 corresponds to the lower column 4. The second splicing position is a second protrusion 12 protruding into the subway station. The second protrusion 12 is prefabricated integrally with the square frame. The middle part of the second protrusion 12 is provided with a positioning groove that matches the size of the ends of the upper column 5 and the lower column 4. The top of the upper column 5 and the bottom of the lower column 4 are respectively embedded into the corresponding groove for positioning. Then, the gaps are filled by pouring concrete on site, so that the column and the square frame are cast as one, realizing a rigid connection of the vertical load-bearing structure.

[0031] Furthermore, the base of the subway station's main structure is integrally cast with a concrete foundation layer 9. The thickness of the foundation layer 9 is greater than the protrusion height of the second protrusion 12 on the inner side of the base slab 3, ensuring that the foundation layer 9 completely covers the second protrusion 12. This not only levels the base surface of the station but also secures the bottom structure of the lower column 4, significantly improving the load-bearing stability of the base. In addition, a concrete foundation layer 9 can also be cast on the intermediate layer formed by the crossbeams, thereby enhancing the tightness of the connection between the crossbeams and the upper column 5.

[0032] In this embodiment, the inclination angle of the wedge-shaped inclined surface is set to 30°-45°, which can achieve automatic locking during the assembly and extrusion process. All prefabricated components have a 2-5mm grouting gap reserved at the splicing contact surface. The surfaces of the tenons, mortises, splicing protrusions and splicing grooves 10 are coated with a polymer cement-based waterproof coating, which, together with the later cast-in-place concrete, forms a sealed and waterproof structure. The lap contact surface of the support beam 8 and the splicing column 6 is provided with an anti-slip toothed structure to increase the contact friction resistance, improve the lateral shear bearing capacity, and prevent the components from slipping and misaligning under horizontal loads. The tenon joint gaps of the square frame are filled with waterproof sealing strips.

[0033] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention shall be within the scope of protection of the pending claims of the present invention.

Claims

1. A prefabricated assembled subway station, characterized in that, It includes multiple square frames, which are spliced ​​together to form the main body of the subway station; The lower end of the lower column is supported in the middle of the base plate of the square frame. Multiple lower columns are evenly distributed along the length of the main body of the subway station. Support beams are provided at the upper end of the lower columns, and the support beams of any two adjacent lower columns are connected to each other. Multiple sets of crossbeams are arranged in parallel along the length of the main body of the subway station to form the subway interlayer. Each set of crossbeams includes two splicing columns. The ends of the two splicing columns that are close to each other are respectively connected to the two sides of the support beam, and the ends of the two splicing columns that are far apart from each other are respectively connected to the middle of the side plate of the square frame. Positioning components are provided between the splicing columns. The two sides of the positioning components and the splicing columns are provided with matching wedge-shaped structures. A square platform extending downward toward the support beam is provided in the middle of the positioning components. The ends of the splicing columns are provided with notches corresponding to the square platform. The lower end of the upper column is supported on the positioning component, and the upper end is supported on the top plate of the square frame. Multiple upper columns are evenly distributed along the length of the main body of the subway station. The widths of the positioning component and the splicing column are matched in the length of the main body of the subway station. The corresponding positioning component is pre-embedded in the upper part of the support beam. The positioning bolt passes down through the positioning component and is threaded onto the screw sleeve. The positioning component is provided with the corresponding positioning bolt assembly hole, and the bottom of the upper column is pre-embedded with the corresponding assembly hole positioning column.

2. The prefabricated assembled subway station according to claim 1, characterized in that, The inner wall of the side plate of the square frame is provided with a first splicing position corresponding to the splicing column. The first splicing position is a first protrusion protruding into the subway station. The splicing column is cast in place with the first protrusion.

3. The prefabricated assembled subway station according to claim 1, characterized in that, The ends of the support beams are reserved with steel bar joints. The steel bar joints between two adjacent support beams are welded and fixed and then connected by cast-in-place concrete.

4. The prefabricated assembled subway station according to claim 1, characterized in that, The inner walls of the top and bottom plates of the square frame are provided with second splicing positions corresponding to the upper and lower columns, respectively; The second splicing position is a second protrusion protruding into the subway station. The second protrusion has a groove in the middle corresponding to the upper or lower column, and the adjacent upper or lower columns are connected into one piece by concrete pouring.

5. The prefabricated assembled subway station according to claim 4, characterized in that, The main body of the subway station is reinforced with a foundation layer, the thickness of which is greater than the height of the second protrusion.

6. The prefabricated assembled subway station according to claim 1, characterized in that, One side of the square frame is provided with a splicing protrusion, and the other side of the square frame is provided with a splicing groove. Adjacent square frames are spliced ​​together by corresponding splicing protrusions and splicing grooves.

7. The prefabricated assembled subway station according to claim 1, characterized in that, The top slab, bottom slab, and side slabs of the square frame are independent prefabricated components; The top and bottom plates of the square frame are respectively provided with bends at both ends, and the ends of the bends are provided with mortises corresponding to the side plates. The ends of the side plates are provided with tenons that fit the mortises.

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