A rail transit assembled platform plate structure and construction method thereof

Abstract

The present invention belongs to the field of rail transit engineering technology, and specifically relates to a rail transit assembled platform plate structure and a construction method thereof, including a prefabricated platform plate, a prefabricated platform plate support wall, a prefabricated platform plate support column, a cast-in-place platform plate support column and a station floor; a plurality of prefabricated platform plate support walls arranged at intervals along the length direction of the track area are provided at positions near the track areas on both sides of the station floor, and adjacent prefabricated platform plate support walls are connected by cast-in-place platform plate support columns to form a platform wall; a platform plate assembled from a plurality of prefabricated platform plates is supported on the platform wall; a bottom longitudinal beam and a prefabricated platform plate support column are also provided at positions between the platform walls on both sides of the station floor, a prefabricated platform plate beam is provided on the prefabricated platform plate support column, and the middle part of the platform plate is supported on the bottom longitudinal beam and the prefabricated platform plate beam. The present invention effectively reduces the difficulty of transportation, hoisting and construction of prefabricated components by reasonably dividing the size of platform components, thereby ensuring the construction period.

Description

Technical Field

[0001] The present invention belongs to the technical field of rail transit engineering, and in particular relates to a rail transit assembled platform plate structure and a construction method thereof. Background Art

[0002] At present, the use of prefabricated technology in domestic subway stations is in its infancy, and there are few cases of using prefabricated internal structures. In addition, the connection nodes between the prefabricated platform slabs and the main structure of the station are complex, the number of reserved steel bars is large, the error is large, the construction technology is cumbersome, the construction efficiency is low, and the construction accuracy is poor. It cannot meet the efficient and green design and construction concepts of prefabricated structures, and there are certain limitations. Summary of the invention

[0003] In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the present invention is to provide a rail transit prefabricated platform slab structure and a construction method thereof. The prefabricated components have a high degree of modularization, a high assembly rate, a simple structural force, and a small number of reserved steel bars for the connecting components. It can realize convenient, fast and accurate urban rail transit platform construction, effectively improve the construction efficiency of urban rail transit platforms, greatly shorten the construction period, and reduce the impact of formwork cast-in-place platform slab construction on construction. It is suitable for subways and similar projects.

[0004] To achieve the above-mentioned purpose, the technical solution of the present invention is a rail transit assembled platform plate structure, including a prefabricated platform plate, a prefabricated platform plate supporting wall, a prefabricated platform plate supporting column, a cast-in-place platform plate supporting column and a station floor; the station floor is provided with a plurality of prefabricated platform plate supporting walls arranged at intervals along the length direction of the track area at positions close to the track areas on both sides, and the adjacent prefabricated platform plate supporting walls are connected by cast-in-place platform plate supporting columns to form platform walls; the platform walls on both sides support platform plates assembled from a plurality of prefabricated platform plates; the station floor is also provided with a bottom longitudinal beam and a prefabricated platform plate supporting column at a position between the platform walls on both sides, the prefabricated platform plate supporting column is provided with a prefabricated platform plate beam, and the middle part of the platform plate is supported on the bottom longitudinal beam and the prefabricated platform plate beam.

[0005] Furthermore, the bottom longitudinal beam is provided between the platform walls on both sides, and the prefabricated platform slab beam is provided between the platform wall on each side and the bottom longitudinal beam; or the prefabricated platform slab beam is provided between the platform walls on both sides, and the bottom longitudinal beam is provided between the platform wall on each side and the prefabricated platform slab beam.

[0006] Furthermore, the prefabricated platform slab includes a side span prefabricated platform slab and a middle span prefabricated platform slab; one end of the side span prefabricated platform slab is supported on the platform wall, and the other end is supported on the prefabricated platform slab beam or the bottom longitudinal beam; one end of the middle span prefabricated platform slab is supported on the bottom longitudinal beam, and the other end is supported on the prefabricated platform slab beam.

[0007] Furthermore, a first reserved steel bar is reserved at a position on the station floor corresponding to the cast-in-place platform slab support column, and the first reserved steel bar extends into the cast-in-place platform slab support column.

[0008] Furthermore, a steel frame is provided in the prefabricated platform slab supporting wall, and two ends of the steel frame extend out of two ends of the prefabricated platform slab supporting wall in the length direction and extend into the corresponding cast-in-place platform slab supporting columns.

[0009] Furthermore, a second reserved steel bar is reserved at a position on the station floor corresponding to the prefabricated platform slab support column, a grouting sleeve is embedded at the bottom of the prefabricated platform slab support column, and the second reserved steel bar is inserted into the grouting sleeve and filled with grouting material.

[0010] Furthermore, the top of the prefabricated platform slab supporting wall, the top of the prefabricated platform slab beam and the top of the bottom longitudinal beam are all embedded with first bolts, and the positions on the prefabricated platform slab corresponding to the first bolts are all reserved with first pin key holes, and the first bolts are inserted into the corresponding first pin key holes and grouting material is poured into them.

[0011] Furthermore, a second bolt is embedded in the top of the prefabricated platform slab support column, and a second pin key hole is reserved on the prefabricated platform slab beam at a position corresponding to the second bolt, the second bolt is inserted into the second pin key hole and grouting material is poured; post-cast concrete is poured between the prefabricated platform slab beams and between the prefabricated platform slab beams and the prefabricated platform slab support columns.

[0012] Furthermore, embedded parts for hoisting and demoulding are pre-embedded on the prefabricated platform slab, the prefabricated platform slab supporting wall, the prefabricated platform slab supporting column and the prefabricated platform slab beam.

[0013] The present invention also provides a construction method for the above-mentioned rail transit assembled platform plate structure, comprising the following steps:

[0014] 1) During the construction of the station floor, the first reserved steel bars and the second reserved steel bars are respectively reserved at the positions corresponding to the cast-in-place platform slab support columns and the prefabricated platform slab support columns on the station floor;

[0015] 2) Tie the steel bars of the cast-in-place platform slab support column at the position of the first reserved steel bars;

[0016] 3) Hoist the prefabricated platform slab support wall to the installation location, and anchor the steel bars of the steel frames extending from both ends of the prefabricated platform slab support wall to the steel bars of the cast-in-place platform slab support column, then cast the cast-in-place platform slab support column, and fix the prefabricated platform slab support wall to the station floor;

[0017] 4) hoist the prefabricated platform slab support column to the installation position, insert the second reserved steel bar into the grouting sleeve at the bottom of the prefabricated platform slab support column and pour in the grouting material, and fix the prefabricated platform slab support column to the station floor;

[0018] 5) hoist the prefabricated platform slab beam to the installation position, insert the second bolt embedded on the top of the prefabricated platform slab support column into the second pin key hole reserved on the prefabricated platform slab beam and pour grouting material, and pour post-cast concrete between the prefabricated platform slab beams and between the prefabricated platform slab support columns to connect the prefabricated platform slab support columns with the prefabricated platform slab beams;

[0019] 6) The prefabricated platform slab is hoisted to the installation position, and the first bolts embedded in the prefabricated platform slab supporting wall, the prefabricated platform slab beam and the top of the bottom longitudinal beam are inserted into the first pin key holes reserved on the prefabricated platform slab and grouting material is poured in.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] (1) The rail transit prefabricated platform plate structure and the construction method thereof provided by the present invention can effectively control the quality of steel bar engineering and concrete engineering, reduce the source of danger, reduce the maintenance time of the structure, and shorten the construction period, and can also protect the finished main structure and reduce the construction cost; and by reasonably dividing the size of the platform components, the transportation, hoisting and construction difficulties of the prefabricated components are effectively reduced, thereby ensuring the construction period;

[0022] (2) The rail transit prefabricated platform slab structure and its construction method provided by the present invention fix the prefabricated platform slab support wall to the station floor through cast-in-place platform slab support columns, thereby optimizing the design defect of the traditional method that the prefabricated wall needs to be connected to the structural floor through a large number of reserved vertical steel bars, and reducing the impact of the steel bar reservation error on the construction of prefabricated components;

[0023] (3) The rail transit prefabricated platform slab structure and the construction method thereof provided by the present invention form a reliable node connection by connecting the pre-buried grouting sleeve in the prefabricated platform slab support column with the second reserved steel bar reserved on the station floor;

[0024] (4) The rail transit prefabricated platform slab structure and its construction method provided by the present invention connect the prefabricated platform slab support column with the prefabricated platform slab beam through wet joint casting, forming a reliable frame beam and column force bearing system with good earthquake resistance;

[0025] (5) The rail transit prefabricated platform slab structure and its construction method provided by the present invention are fixed by the first pin key hole reserved on the platform slab with the first bolt reserved on the prefabricated platform slab support wall and the first bolt reserved on the prefabricated platform slab beam, forming a complete plate-beam-column force-bearing system of the prefabricated platform slab, prefabricated platform slab beam, prefabricated platform slab support wall and prefabricated platform slab support column. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic diagram of the structure of a single-column rail transit station prefabricated platform provided by an embodiment of the present invention;

[0028] Figure 2 A schematic diagram of the structure of a double-column rail transit station prefabricated platform provided by an embodiment of the present invention;

[0029] Figure 3 A schematic diagram of reinforcement arrangement of a cast-in-place platform slab support column provided in an embodiment of the present invention;

[0030] Figure 4 An elevation view of a prefabricated platform slab support wall provided for an embodiment of the present invention;

[0031] Figure 5 A plan view of a prefabricated platform slab support wall provided for an embodiment of the present invention;

[0032] Figure 6 for Figure 4 AA view;

[0033] Figure 7 A schematic diagram of reinforcement arrangement of a prefabricated platform slab support wall provided in an embodiment of the present invention;

[0034] Figure 8 A schematic diagram of the structure of a prefabricated platform slab support column provided in an embodiment of the present invention;

[0035] Fig. 9 A schematic diagram of the connection between the prefabricated platform slab support column, the prefabricated platform slab beam and the station floor provided in an embodiment of the present invention;

[0036] Fig.10 A schematic diagram of reinforcement arrangement of a prefabricated platform slab beam provided in an embodiment of the present invention;

[0037] Fig.11A plan view of a side span prefabricated platform slab provided for an embodiment of the present invention;

[0038] Fig.12 for Fig.11 CC view;

[0039] Fig.13 for Fig.11 DD view;

[0040] Fig.14 A plan view of a mid-span prefabricated platform slab provided for an embodiment of the present invention;

[0041] Fig.15 for Fig.14 EE view;

[0042] Fig.16 for Fig.14 FF view;

[0043] Fig.17 A schematic diagram of the construction of a rail transit assembled platform plate structure provided by an embodiment of the present invention;

[0044] Fig.18 A schematic diagram of the construction of a rail transit assembled platform plate structure provided by an embodiment of the present invention;

[0045] Fig.19 A schematic diagram of the construction of a rail transit assembled platform plate structure provided by an embodiment of the present invention;

[0046] Fig. 20 A schematic diagram of the construction of a rail transit assembled platform plate structure provided by an embodiment of the present invention;

[0047] Fig.21 A schematic diagram of the construction of a rail transit assembled platform plate structure provided by an embodiment of the present invention;

[0048] In the figure: 1. cast-in-place platform slab support column; 2. precast platform slab support wall; 3. precast platform slab support column; 4. precast platform slab beam; 5. precast platform slab; 501. side span precast platform slab; 502. middle span precast platform slab; 6. first reserved steel bar; 7. second reserved steel bar; 8. grouting sleeve; 9. grouting material; 10. first bolt; 11. first pin key hole; 12. second bolt; 13. second pin key hole; 14. embedded parts; 15. station floor; 16. bottom longitudinal beam; 17. post-poured concrete. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0051] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0052] like Figure 1-Figure 2 As shown, this embodiment provides a rail transit assembled platform slab structure, including a prefabricated platform slab 5, a prefabricated platform slab supporting wall 2, a prefabricated platform slab supporting column 3, a cast-in-place platform slab supporting column 1 and a station floor 15; the station floor 15 is provided with a plurality of prefabricated platform slab supporting walls 2 arranged at intervals along the length direction of the track area at positions close to the track areas on both sides, and the adjacent prefabricated platform slab supporting walls 2 are connected by cast-in-place platform slab supporting columns 1 to form platform walls; the platform walls on both sides support platform slabs assembled from a plurality of prefabricated platform slabs 5; the station floor 15 is also provided with a bottom longitudinal beam 16 and a prefabricated platform slab supporting column 3 at a position between the platform walls on both sides, the prefabricated platform slab supporting column 3 is provided with a prefabricated platform slab beam 4, and the middle part of the platform slab is supported on the bottom longitudinal beam 16 and the prefabricated platform slab beam 4. The rail transit assembled platform slab structure and the construction method thereof provided by the present invention effectively reduce the difficulty of transportation, hoisting and construction of prefabricated components by reasonably dividing the sizes of platform components, thereby ensuring the construction period.

[0053] In this embodiment, the width of the prefabricated platform slab 5 is 1m~1.5m and the length is 2m~3m, which effectively reduces the volume and weight of the prefabricated components and improves the lifting construction efficiency; the width of the prefabricated platform slab supporting wall 2 is about 3m and the height is about 1m~1.5m, which effectively reduces the volume and weight of the prefabricated components and improves the lifting construction efficiency.

[0054] As an implementation method, the bottom longitudinal beam 16 is provided between the platform walls on both sides, and the prefabricated platform slab beam 4 is provided between the platform wall and the bottom longitudinal beam 16 on each side, so as to form a prefabricated platform of a single-column station of rail transit. Figure 1 As shown; as another embodiment, the prefabricated platform slab beam 4 is provided between the platform walls on both sides, and the bottom longitudinal beam 16 is provided between the platform wall on each side and the prefabricated platform slab beam 4, forming a rail transit double-column station assembled platform, such as Figure 2 shown.

[0055] Furthermore, the prefabricated platform plate 5 includes a side span prefabricated platform plate 501 and a middle span prefabricated platform plate 502; one end of the side span prefabricated platform plate 501 is supported on the platform wall, and the other end is supported on the prefabricated platform plate beam 4 or the bottom longitudinal beam 16; one end of the middle span prefabricated platform plate 502 is supported on the bottom longitudinal beam 16, and the other end is supported on the prefabricated platform plate beam 4, as shown in FIG. Figure 1 and Figure 2 shown.

[0056] Furthermore, a first reserved steel bar 6 is reserved at a position on the station floor 15 corresponding to the cast-in-place platform slab support column 1, and the first reserved steel bar 6 extends into the cast-in-place platform slab support column 1, so that the cast-in-place platform slab support column 1 forms a reliable connection node with the station floor 15. Figure 1-Figure 3 shown. Figure 3 The size and reinforcement of the cast-in-place platform slab support column 1 can be adjusted according to the actual stress state.

[0057] Furthermore, a steel frame is provided in the prefabricated platform slab support wall 2, and two ends of the steel frame extend out of the two ends of the prefabricated platform slab support wall 2 in the length direction and extend into the corresponding cast-in-place platform slab support column 1. Figure 7 As shown, in this embodiment, the prefabricated platform slab support wall 2 forms an effective connection with the station floor 15 by extending and anchoring the two ends of the steel frame in advance in the cast-in-place platform slab support column 1, thereby effectively reducing the construction error caused by the traditional method of prefabricated wall requiring a large number of reserved steel bars to connect with the structural floor. Figure 7 The size and reinforcement of the middle precast platform slab support wall 2 can be adjusted according to the actual stress state.

[0058] Furthermore, a second reserved steel bar 7 is reserved at a position corresponding to the prefabricated platform support column 3 on the station floor 15, a grouting sleeve 8 is embedded at the bottom of the prefabricated platform support column 3, and the second reserved steel bar 7 is inserted into the grouting sleeve 8 and filled with grouting material 9. Figure 8As shown, in this embodiment, the second reserved steel bar 7 is reserved on the station floor 15 in advance, and the grouting sleeve 8 is embedded at the bottom of the prefabricated platform slab support column 3. Later, the second reserved steel bar 7 on the station floor 15 is inserted into the grouting sleeve 8 at the bottom of the prefabricated platform slab support column 3 and then connected by pouring grouting material 9 to form a reliable force node, thereby effectively connecting the prefabricated platform slab support column 3 with the station floor 15.

[0059] Furthermore, the top of the prefabricated platform slab support wall 2, the top of the prefabricated platform slab beam 4 and the top of the bottom longitudinal beam 16 are all pre-embedded with first bolts 10, and the positions corresponding to the first bolts 10 on the prefabricated platform slab 5 are all pre-reserved with first pin key holes 11, and the first bolts 10 are inserted into the corresponding first pin key holes 11 and poured with grouting material 9. In this embodiment, the first bolts 10 pre-embedded on the prefabricated platform slab support wall 2, the prefabricated platform slab beam 4 and the bottom longitudinal beam 16 are connected with the first pin key holes 11 on the prefabricated platform slab 5 by pouring grouting material 9, so as to form a complete plate-beam-column force system of the prefabricated platform slab 5, the prefabricated platform slab beam 4, the prefabricated platform slab support wall 2, the prefabricated platform slab support column 3 and the bottom longitudinal beam 16. The prefabricated platform slabs 5 on the bottom longitudinal beam 16 of this embodiment are connected with each other by post-cast concrete.

[0060] Furthermore, a second bolt 12 is embedded in the top of the prefabricated platform slab support column 3, and a second pin key hole 13 is reserved on the prefabricated platform slab beam 4 at a position corresponding to the second bolt 12. The second bolt 12 is inserted into the second pin key hole 13 and grouting material 9 is poured into the second pin key hole 13. Figure 8-Figure 9 As shown; post-cast concrete 17 is poured between the prefabricated platform slab beams 4 and between the prefabricated platform slab beams 4 and the prefabricated platform slab support columns 3. In this embodiment, the beam-column node range of the prefabricated platform slab support columns 3 and the prefabricated platform slab beams 4 adopts wet node cast-in-place, which has good stability and seismic performance; and the prefabricated platform slab support columns 3 and the prefabricated platform slab beams are both reserved with steel bars extending into the post-cast concrete 17, which can form reliable beam and column force nodes, such as Fig. 9 shown. Fig.10 The size and reinforcement of the middle precast platform slab beam 4 can be adjusted according to the actual stress state.

[0061] Furthermore, the prefabricated platform slab 5, the prefabricated platform slab supporting wall 2, the prefabricated platform slab supporting column 3 and the prefabricated platform slab beam 4 are all pre-embedded with embedded parts 14 for hoisting and demoulding, which is convenient for the later hoisting construction of prefabricated components. Figure 4-Figure 6 , Figure 11-Figure 12 as well as Figure 14-15 shown.

[0062] like Figure 1-Figure 2 as well as Figure 17-Figure 21As shown, this embodiment also provides a construction method for the above-mentioned rail transit assembled platform plate structure, comprising the following steps:

[0063] 1) During the construction of the station floor 15 of the subway station, first reserved steel bars 6 and second reserved steel bars 7 are reserved in advance on the station floor 15 at positions corresponding to the cast-in-place platform slab support columns 1 and the prefabricated platform slab support columns 3;

[0064] 2) When constructing the cast-in-place platform slab support column 1 in the adjacent track area, firstly, the station floor 15 is leveled by plain concrete, and the leveling surface is coated with a new concrete interface agent in advance, and then the steel bars of the cast-in-place platform slab support column 1 are tied at the position of the first reserved steel bar 6 on the station floor 15;

[0065] 3) hoisting the prefabricated platform slab support wall 2 between the cast-in-place platform slab support columns 1 to be constructed by a small lifting vehicle, and anchoring the steel bars of the steel bars of the cast-in-place platform slab support columns 1 extending from both ends of the prefabricated platform slab support wall 2, and then casting the cast-in-place platform slab support columns 1, and fixing the prefabricated platform slab support wall 2 on the station floor 15 by the cast-in-place platform slab support columns 1, so that the cast-in-place platform slab support columns 1, the prefabricated platform slab support wall 2 and the station floor 15 are connected as a whole;

[0066] 4) Use a small lifting vehicle to hoist the prefabricated platform slab support column 3 to the position of the second reserved steel bar 7, insert the second reserved steel bar 7 into the grouting sleeve 8 at the bottom of the prefabricated platform slab support column 3 and pour in the grouting material 9, and fix the prefabricated platform slab support column 3 on the station floor 15;

[0067] 5) Use a small lifting vehicle to hoist the prefabricated platform slab beam 4 onto the prefabricated platform slab support column 3, insert the second bolt 12 embedded in the top of the prefabricated platform slab support column 3 into the second pin key hole 13 reserved on the prefabricated platform slab beam 4, and pour the grouting material 9, and pour the post-cast concrete 17 between the prefabricated platform slab beams 4 and between the prefabricated platform slab support columns 3 to form a wet node cast-in-place, connect the prefabricated platform slab support column 3 with the prefabricated platform slab beam 4, and form a reliable frame beam and column force system; and the prefabricated platform slab beam 4 and the prefabricated platform slab support column 3 are both reserved with steel bars extending into the post-cast concrete 17 to improve the reliability of the node;

[0068] 6) Use a small lifting vehicle to hoist the prefabricated platform slab 5 to the position of the prefabricated platform slab supporting wall 2 and the prefabricated platform slab beam 4, insert the first bolts 10 embedded in the prefabricated platform slab supporting wall 2, the prefabricated platform slab beam 4 and the top of the bottom longitudinal beam 16 into the first pin key holes 11 reserved on the prefabricated platform slab 5 and pour in the grouting material 9, so as to form a complete plate-beam-column force bearing system of the prefabricated platform slab 5, the prefabricated platform slab beam 4, the prefabricated platform slab supporting wall 2, the prefabricated platform slab supporting column 3 and the bottom longitudinal beam 16;

[0069] For the prefabricated platform of single-column rail transit station, such as Figure 20-21 As shown, step 6) is specifically as follows: first, hoist the side span prefabricated platform plate 501 to the installation position, and align the first pin key holes 11 reserved on both sides thereof with the first bolts 10 reserved on the prefabricated platform plate supporting wall 2 and the prefabricated platform plate beam 4, respectively; then, pour in the grouting material 9 to form a reliable connection between the side span prefabricated platform plate 501 and the prefabricated platform plate supporting wall 2 and the prefabricated platform plate beam 4; then, hoist the middle span prefabricated platform plate 502 to the installation position, and align the first pin key holes 11 reserved on both sides thereof with the first bolts 10 reserved on the bottom longitudinal beam 16 and the prefabricated platform plate beam 4, respectively; then, pour in the grouting material 9 to form a reliable connection between the middle span prefabricated platform plate 502 and the bottom longitudinal beam 16 and the prefabricated platform plate beam 4;

[0070] For the assembled platform of the double-column station of rail transit, step 6) is specifically as follows: first, hoist the side span prefabricated platform plate 501 to the installation position, and align the first pin key holes 11 reserved on both sides thereof with the first bolts 10 reserved on the prefabricated platform plate supporting wall 2 and the bottom longitudinal beam 16, respectively, and then inject grouting material 9 to form a reliable connection between the side span prefabricated platform plate 501 and the prefabricated platform plate supporting wall 2 and the bottom longitudinal beam 16; then, hoist the middle span prefabricated platform plate 502 to the installation position, and align the first pin key holes 11 reserved on both sides thereof with the first bolts 10 reserved on the bottom longitudinal beam 16 and the prefabricated platform plate beam 4, respectively, and then inject grouting material 9 to form a reliable connection between the middle span prefabricated platform plate 502 and the bottom longitudinal beam 16 and the prefabricated platform plate beam 4;

[0071] 7) According to the measured elevation, pour a layer of plain concrete leveling layer on the assembled platform slab to complete the construction of the prefabricated platform.

[0072] The above description is only 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 principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A rail transit assembled platform plate structure, characterized in that: It includes prefabricated platform slabs, prefabricated platform slab supporting walls, prefabricated platform slab supporting columns, cast-in-place platform slab supporting columns and station floor; the station floor is provided with a plurality of prefabricated platform slab supporting walls arranged at intervals along the length direction of the track area at positions close to the track areas on both sides, and adjacent prefabricated platform slab supporting walls are connected by cast-in-place platform slab supporting columns to form platform walls; platform slabs assembled from a plurality of prefabricated platform slabs are supported on the platform walls on both sides; a bottom longitudinal beam and prefabricated platform slab supporting columns are also provided on the station floor between the platform walls on both sides, a prefabricated platform slab beam is provided on the prefabricated platform slab supporting columns, and the middle part of the platform slab is supported on the bottom longitudinal beam and the prefabricated platform slab beam.

2. The rail transit assembled platform structure according to claim 1, characterized in that: The bottom longitudinal beam is provided between the platform walls on both sides, and the prefabricated platform slab beam is provided between the platform wall on each side and the bottom longitudinal beam; or the prefabricated platform slab beam is provided between the platform walls on both sides, and the bottom longitudinal beam is provided between the platform wall on each side and the prefabricated platform slab beam.

3. A rail transit assembled platform structure as claimed in claim 2, characterized in that: The prefabricated platform slab comprises a side span prefabricated platform slab and a middle span prefabricated platform slab; one end of the side span prefabricated platform slab is supported on the platform wall, and the other end is supported on the prefabricated platform slab beam or the bottom longitudinal beam; one end of the middle span prefabricated platform slab is supported on the bottom longitudinal beam, and the other end is supported on the prefabricated platform slab beam.

4. The rail transit assembled platform structure according to claim 1, characterized in that: A first reserved steel bar is reserved at a position on the station floor corresponding to the cast-in-place platform slab support column, and the first reserved steel bar extends into the cast-in-place platform slab support column.

5. A rail transit assembled platform structure as claimed in claim 1 or 4, characterized in that: A steel frame is provided in the prefabricated platform slab support wall, and two ends of the steel frame extend out of the two ends of the prefabricated platform slab support wall in the length direction and extend into the corresponding cast-in-place platform slab support columns.

6. The rail transit assembled platform structure according to claim 1, characterized in that: A second reserved steel bar is reserved on the station floor at a position corresponding to the prefabricated platform slab support column, a grouting sleeve is embedded at the bottom of the prefabricated platform slab support column, and the second reserved steel bar is inserted into the grouting sleeve and filled with grouting material.

7. The rail transit assembled platform structure according to claim 1, characterized in that: The top of the prefabricated platform slab supporting wall, the top of the prefabricated platform slab beam and the top of the bottom longitudinal beam are all embedded with first bolts, and the positions of the prefabricated platform slab corresponding to the first bolts are all reserved with first pin key holes, and the first bolts are inserted into the corresponding first pin key holes and grouting material is poured into them.

8. The rail transit assembled platform structure according to claim 1, characterized in that: A second bolt is embedded in the top of the prefabricated platform slab support column, and a second pin key hole is reserved on the prefabricated platform slab beam at a position corresponding to the second bolt. The second bolt is inserted into the second pin key hole and grouting material is poured; post-cast concrete is poured between the prefabricated platform slab beams and between the prefabricated platform slab beams and the prefabricated platform slab support column.

9. The rail transit assembled platform structure according to claim 1, characterized in that: The prefabricated platform slab, the prefabricated platform slab supporting wall, the prefabricated platform slab supporting column and the prefabricated platform slab beam are all pre-embedded with embedded parts for hoisting and demoulding.

10. A construction method for a rail transit assembled platform slab structure according to any one of claims 1 to 9, characterized in that: The steps include: 1) During the construction of the station floor, the first reserved steel bars and the second reserved steel bars are respectively reserved at the positions corresponding to the cast-in-place platform slab support columns and the prefabricated platform slab support columns on the station floor; 2) Tie the steel bars of the cast-in-place platform slab support column at the position of the first reserved steel bars; 3) Hoist the prefabricated platform slab support wall to the installation location, and anchor the steel bars of the steel frames extending from both ends of the prefabricated platform slab support wall to the steel bars of the cast-in-place platform slab support column, then cast the cast-in-place platform slab support column, and fix the prefabricated platform slab support wall to the station floor; 4) hoist the prefabricated platform slab support column to the installation position, insert the second reserved steel bar into the grouting sleeve at the bottom of the prefabricated platform slab support column and pour in the grouting material, and fix the prefabricated platform slab support column to the station floor; 5) hoist the prefabricated platform slab beam to the installation position, insert the second bolt embedded on the top of the prefabricated platform slab support column into the second pin key hole reserved on the prefabricated platform slab beam and pour grouting material, and pour post-cast concrete between the prefabricated platform slab beams and between the prefabricated platform slab support columns to connect the prefabricated platform slab support columns with the prefabricated platform slab beams; 6) The prefabricated platform slab is hoisted to the installation position, and the first bolts embedded in the prefabricated platform slab supporting wall, the prefabricated platform slab beam and the top of the bottom longitudinal beam are inserted into the first pin key holes reserved on the prefabricated platform slab and grouting material is poured in.

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