Prefabricated arch angle plate and assembled underground station

Abstract

The present invention relates to a prefabricated arch angle plate, comprising an arch plate and a side wall plate connected to the arch plate, wherein the arch plate is a curved plate and is prefabricated integrally with the side wall plate, the lateral free end of the arch plate is provided with an arch connection structure for connecting to an external arch segment, and the bottom end of the side wall plate is provided with a side wall connection structure for connecting to an external side wall segment. It also relates to an assembled underground station using the prefabricated arch angle plate. The present invention can realize the assembled construction of underground stations, especially the assembled construction of station arches, by prefabricating the side wall plates and the arch plates integrally, and then connecting the side wall plates with adjacent external side wall segments and connecting the arch plates with external arch segments; and can effectively improve the strength and construction quality of the connection nodes between the station arch and the station side walls, so that the load on the station arch can be reliably transmitted to the station side walls, thereby ensuring the engineering quality and operational safety of the assembled underground station.

Description

Technical Field

[0001] The present invention belongs to the technical field of building engineering, and in particular to the technical field of underground station construction, and specifically to a prefabricated arch angle plate and an assembled underground station using the prefabricated arch angle plate. Background Art

[0002] Underground stations are mostly constructed using cast-in-place reinforced concrete, which has a poor construction environment, complex procedures, and a long construction period. They are greatly affected by various weather and climate conditions, and the construction quality is difficult to guarantee due to the influence of many factors. At the same time, a lot of abandoned construction waste is generated during the construction process, which wastes resources and pollutes the environment.

[0003] With the gradual application of prefabricated construction, the prefabricated construction of underground stations has also been promoted, which can significantly improve the construction efficiency and quality of underground stations, improve the construction environment of underground stations, etc. However, it is currently impossible to achieve full prefabrication and assembly construction of underground stations. For example, the station arch is generally cast-in-place. If the station arch is also prefabricated, the strength and construction quality of the connection node between it and the station side wall are difficult to guarantee. The load borne by the station arch is easily transferred to the connection node with relatively weak structural strength, thereby affecting the operation safety of the underground station. Summary of the invention

[0004] The invention relates to a prefabricated arch angle plate and an assembled underground station using the prefabricated arch angle plate, which can at least solve some defects of the prior art.

[0005] The present invention relates to a prefabricated arch corner plate, comprising an arch plate and a side wall plate connected to the arch plate, wherein the arch plate is a curved plate and is prefabricated integrally with the side wall plate, a transverse free end of the arch plate is provided with an arch connection structure for connecting to an external arch segment, and a bottom end of the side wall plate is provided with a side wall connection structure for connecting to an external side wall segment.

[0006] As one of the implementation modes, the arch connection structure includes a plurality of transverse bolt sleeves embedded in the transverse free end of the arch plate; or, the arch connection structure includes a transverse connecting steel plate fixed to the transverse free end of the arch plate, and a plurality of transverse bolt through holes are provided at the transverse free end of the transverse connecting steel plate.

[0007] As one of the implementation modes, when the arch connection structure includes a plurality of transverse bolt sleeves, each transverse bolt sleeve is anchored by a pre-embedded anchor bar buried in the arch plate.

[0008] As one of the embodiments, when the arch connection structure includes a transverse connecting steel plate, the transverse connecting steel plate includes a web and a mounting end wing plate and a connecting end wing plate respectively connected to the two transverse ends of the web, wherein the mounting end wing plate is buried in the transverse free end of the arch plate and anchored by an anchor steel bar buried in the arch plate, and the bolt through hole is opened on the connecting end wing plate.

[0009] As one of the implementation modes, transverse reinforcements are provided in the vault plate, the transverse reinforcements extend from the transverse free ends of the vault plate, and the transverse reinforcements are distributed on the upper side and / or the lower side of the vault connection structure.

[0010] As one of the implementation modes, the side wall connection structure includes a plurality of vertical bolt sleeves embedded in the bottom end of the side wall panel; or, the side wall connection structure includes a vertical connection steel plate fixed to the bottom end of the side wall panel, and a plurality of vertical bolt through holes are provided at the vertical free end of the vertical connection steel plate.

[0011] As one of the implementation modes, the side wall panel is provided with grouting holes, and the grouting holes respectively penetrate the top and bottom ends of the side wall panel; or, the side wall panel is provided with grouting holes and a grouting channel connected to the grouting holes, and the grouting holes penetrate the bottom end of the side wall panel, and the entrance and exit of the grouting channel are both opened on the station side wall surface of the side wall panel.

[0012] The present invention also relates to an assembled underground station, comprising a station floor, a station middle plate and two sets of side wall structures, wherein the side wall structure comprises a plurality of side wall segments sequentially spliced ​​along the longitudinal direction of the station, a plurality of arch segments and a plurality of prefabricated arch corner plates as described above,

[0013] The prefabricated arch corner panels on each side are spliced ​​in sequence along the longitudinal direction of the station; the arch panels and arch segments are connected correspondingly to form the station arch, and the side wall panels on each side are connected to the side wall segments on the corresponding sides to form the station side walls.

[0014] The present invention has at least the following beneficial effects:

[0015] The present invention can realize the assembled construction of underground stations, especially the assembled construction of station vaults, by prefabricating side wall panels and vault panels as a whole, and then connecting the side wall panels with adjacent external side wall segments and connecting the vault panels with external vault segments. It can also effectively improve the strength and construction quality of the connection nodes between the station vaults and the station side walls, and the loads on the station vaults can be reliably transmitted to the station side walls, thereby ensuring the engineering quality and operational safety of the assembled underground stations. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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.

[0017] Figure 1 A schematic diagram of the structure of an assembled underground station provided by an embodiment of the present invention;

[0018] Figure 2 A schematic diagram of the structure of a prefabricated arch corner plate provided in an embodiment of the present invention;

[0019] Figure 3 A schematic diagram of the connection structure between the vault plate and the vault segment provided in an embodiment of the present invention;

[0020] Figure 4 for Figure 3 Middle AA section view;

[0021] Figure 5 for Figure 3 Middle BB section view;

[0022] Figure 6 for Figure 3 Middle CC section view;

[0023] Figure 7 for Figure 3 Middle DD section view;

[0024] Figure 8 A schematic diagram of the connection structure between the side wall panels and the middle side wall segments provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention are described clearly and completely below. 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.

[0026] Embodiment 1

[0027] like Figure 1 and Figure 2An embodiment of the present invention provides a prefabricated arch corner plate 1, comprising an arch plate 12 and a side wall plate 11 connected to the arch plate 12, wherein the arch plate 12 is a curved plate and is prefabricated integrally with the side wall plate 11, a transverse free end of the arch plate 12 is provided with an arch connection structure for connecting to an external arch segment 2, and a bottom end of the side wall plate 11 is provided with a side wall connection structure for connecting to an external side wall segment.

[0028] Generally, the arch top plate 12 and the side wall plate 11 are both reinforced concrete structures; the prefabrication process of the prefabricated arch corner plate 1 is a conventional technology in the field and will not be described in detail here.

[0029] In one of the embodiments, the curvature of the top surface and the curvature of the bottom surface of the above-mentioned arch plate 12 are different, wherein, preferably, the top surface of the arch plate 12 is suitable for smoothly docking with the top surface of the side wall plate 11, and the bottom surface of the arch plate 12 is suitable for smoothly docking with the station side wall surface of the side wall plate 11. Based on this structure, the end of the arch plate 12 is roughly connected to the top corner of the side wall plate 11, and the arch load can be decomposed into horizontal thrust and vertical pressure and reliably transmitted to the side wall plate 11, thereby effectively improving the stress performance of the station arch.

[0030] The prefabricated arch angle plate 1 provided in this embodiment can realize the assembled construction of underground stations, especially the assembled construction of station arches, by prefabricating the side wall panels 11 and the arch panels 12 in one piece, and then connecting the side wall panels 11 with the adjacent external side wall segments and connecting the arch panels 12 with the external arch segments 2, thereby realizing the assembled construction of underground stations; and can effectively improve the connection node strength and construction quality between the station arch and the station side walls, and the load on the station arch can be reliably transmitted to the station side walls, thereby ensuring the engineering quality and operational safety of the assembled underground stations.

[0031] As a part of the station vault, the vault plate 12 needs to be connected to the external vault segment 2. The external vault segment 2 can be a cast-in-place structure, and the vault connection structure can be a transverse steel bar 74 extending beyond the transverse free end of the vault plate; however, it is preferred that the external vault segment 2 is also a prefabricated structure to improve the construction efficiency of the underground station.

[0032] For the connection between the vault plate 12 and the prefabricated external vault segment 2, a tongue-and-groove connection structure may be used. As a preferred solution of this embodiment, Figure 3-Figure 5The arch connection structure includes a plurality of transverse bolt sleeves 71 embedded in the transverse free end of the arch plate; or, the arch connection structure includes a transverse connecting steel plate 72 fixed to the transverse free end of the arch plate, and a plurality of transverse bolt through holes are provided at the transverse free end of the transverse connecting steel plate 72. Specifically, when the transverse bolt sleeve 71 is embedded in the transverse free end of the arch plate, the transverse connecting steel plate 72 is installed on the above-mentioned external arch segment 2, the transverse free end of the transverse connecting steel plate 72 abuts against the transverse free end of the arch plate and its transverse bolt through holes are aligned one by one with the transverse bolt sleeve 71, and then the transverse connecting steel plate 72 is connected and fixed to the arch plate 12 by bolts, thereby realizing the connection between the arch plate 12 and the external arch segment 2; similarly, when the transverse connecting steel plate 72 is installed at the transverse free end of the arch plate, the transverse bolt sleeve 71 is embedded in the above-mentioned external arch segment 2, the transverse free end of the transverse connecting steel plate 72 abuts against the external arch segment 2 and its transverse bolt through holes are aligned one by one with the transverse bolt sleeve 71, and then the transverse connecting steel plate 72 is connected and fixed to the external arch segment 2 by bolts, thereby realizing the connection between the arch plate 12 and the external arch segment 2.

[0033] It should be noted that, due to the shape of the station vault, the transverse direction of the vault plate 12 involved in this embodiment is different from the transverse direction of the station, which is obviously adaptive to the extension trend of the free end of the vault plate 12 (to facilitate smooth connection with the vault segment 2). Figure 4 and Figure 5 It can be seen that no additional explanation is given below.

[0034] More preferably, if Figure 3 and Figure 5 When the vault connection structure includes a plurality of transverse bolt sleeves 71, each transverse bolt sleeve 71 is anchored by a pre-embedded anchor bar 73 embedded in the vault plate 12 to ensure the pre-embedded structural strength and force performance of the transverse bolt sleeve 71 in the vault plate 12, thereby ensuring the connection structural strength and working reliability between the transverse bolt sleeve 71 and the transverse connecting steel plate 72 and the bolt. Similarly, when the transverse bolt sleeve 71 is pre-embedded in the external vault segment 2, the above-mentioned anchoring structure can be used.

[0035] Further preferably, when the vault connection structure includes a transverse connecting steel plate 72, the transverse connecting steel plate 72 includes a web and a mounting end wing plate and a connecting end wing plate respectively connected to the two transverse ends of the web, wherein the mounting end wing plate is embedded in the transverse free end of the vault plate and anchored by the anchor steel bar embedded in the vault plate 12, and the bolt through hole is provided on the connecting end wing plate. Then the transverse connecting steel plate 72 is embedded in the vault plate 12 when the side wall vault node plate is prefabricated, and the mounting end wing plate is embedded in the vault plate 12 to improve the bonding force and integrated force performance between it and the vault plate 12; the connecting end wing plate is used to abut against the external vault segment 2. Among them, stiffening ribs can be set on the web to improve the structural strength and rigidity of the transverse connecting steel plate 72, thereby improving the force performance of the station vault. Similarly, when the transverse connecting steel plate 72 is installed on the external vault segment 2, the above-mentioned installation structure can be adopted.

[0036] By adopting the assembly structure of the above-mentioned transverse bolt sleeve 71-transverse connecting steel plate 72 and bolts, while meeting the structural strength and stress performance of the station arch, it is convenient for the assembly construction between the above-mentioned side wall arch node plate and the above-mentioned external arch segment 2. The bolts can be screwed into the transverse bolt sleeve 71 by using operating tools such as manipulators, which can improve the construction efficiency; by aligning the transverse bolt through holes on the transverse connecting steel plate 72 with the transverse bolt sleeve 71, the alignment accuracy between the arch plate 12 and the external arch segment 2 can be guaranteed, thereby improving the construction quality.

[0037] When the above-mentioned vault plate 12 is connected to the external vault segment 2, after the assembly structure of the above-mentioned transverse bolt sleeve 71-transverse connecting steel plate 72 and bolts is completed, concrete is poured into the connection node between the vault plate 12 and the external vault segment 2. On the one hand, the upper plate surface of the station vault is a complete and continuous plane to achieve structural integrity. On the other hand, the connection node is a steel plate-concrete node, which can effectively improve the structural reliability and stress performance of the connection node. Preferably, transverse steel bars 74 are provided in the vault plate 12, and the transverse steel bars 74 extend from the transverse free end of the vault plate. The transverse steel bars 74 are distributed on the upper side and / or the lower side of the vault connection structure. When pouring concrete at the above-mentioned connection node, in addition to covering the above-mentioned transverse connecting steel plate 72, the concrete also consolidates the protruding transverse steel bars 74, which can improve the bonding force and coordinated stress performance between the vault plate 12 and the cast-in-place concrete. Figure 4 and Figure 5 Preferably, transverse reinforcement bars 74 extend from the upper and lower sides of the arch connection structure, respectively.

[0038] Furthermore, if Figure 4 and Figure 5, the above-mentioned external vault segment 2 also has correspondingly extended transverse steel bars 74, which can also improve the bonding force and coordinated force-bearing capacity between the external vault segment 2 and the cast-in-place concrete. The following defines the transverse steel bars 74 of the vault plate 12 as the plate transverse steel bars 74, and the transverse steel bars 74 of the external vault segment 2 as the segment transverse steel bars 74; wherein, preferably, on the upper side of the vault connection structure, the plate transverse steel bars 74 are welded to the segment transverse steel bars 74, which is convenient to operate here, thereby ensuring the efficiency and quality of the steel bar welding operation, and at the same time, can improve the strength and stiffness of the steel bar skeleton near the upper surface of the station vault, thereby improving the force-bearing performance of the station vault. Further, if Figure 4 and Figure 5 The free transverse end of the vault plate adopts a step structure, which is formed at the top of the vault plate 12 and is narrow at the top and wide at the bottom. The plate transverse reinforcement 74 at the top of the vault plate 12 extends from the vertical connection surface of the step structure and the extension length is less than the width of the lower step surface. The segment transverse reinforcement 74 extends to the step structure and is welded with the plate transverse reinforcement 74, which is easy to operate. Moreover, when the concrete is cast in place, the concrete also fills the step structure, which can not only improve the bonding force between the vault plate 12 and the cast-in-place concrete, but also the cast-in-place concrete is partially engaged and placed on the vault plate 12. Therefore, the vault plate 12 has a supporting and restraining effect on the cast-in-place concrete, which can improve the stress performance and working reliability at the node. Welding the plate transverse reinforcement 74 on the upper side of the vault connection structure with the segment transverse reinforcement 74 can ensure the structural strength and shear resistance and other stress performance at the node.

[0039] Optionally, at the lower side of the arch connection structure, the plate transverse reinforcement 74 is overlapped with the segment transverse reinforcement 74 to facilitate the construction operation. Figure 4 and Figure 5 The corresponding end of the above-mentioned external vault segment 2 adopts a step structure, which is formed at the bottom of the external vault segment 2 and is wide at the top and narrow at the bottom. The segment transverse reinforcement 74 of the external vault segment 2 extends from the vertical connection surface of the step structure and extends to the transverse free end of the vault plate. The plate transverse reinforcement 74 extends to the step structure and overlaps with the segment transverse reinforcement 74. Based on this structure, on the one hand, the reinforcement overlap length can be increased, and the structural strength and working reliability at the node can be improved. On the other hand, when the concrete is cast in place, the concrete also fills the step structure, which can not only improve the bonding force between the external vault segment 2 and the cast-in-place concrete, but also the external vault segment 2 is partially engaged and placed on the cast-in-place concrete. Therefore, the cast-in-place concrete has a supporting and restraining effect on the external vault segment 2, which can improve the load bearing capacity of the external vault segment 2. Especially in the design of underground stations without supporting columns, the external vault segment 2 can meet the structural force requirements and ensure the safety of station operation.

[0040] It can be understood that within the longitudinal length of the underground station (the longitudinal direction of the station is parallel to the longitudinal direction of the track), multiple pieces of the above-mentioned prefabricated arch angle panels 1 are spliced ​​on each lateral side of the station to facilitate the production, transportation, storage and on-site construction of prefabricated parts. Among two adjacent prefabricated arch angle panels 1, the two arch top panels 12 are spliced, and the two side wall panels 11 are spliced; the splicing structure can adopt a conventional tongue-and-groove splicing structure. In this embodiment, the following splicing structure is preferably adopted:

[0041] Take the splicing of two adjacent vault panels 12 as an example. Figure 3 , Figure 6 and Figure 7 , each arch plate 12 is provided with a post-casting groove 811 at both longitudinal ends. When two arch plates 12 are spliced, the two post-casting grooves 811 at the splicing node are spliced ​​together to form a post-casting channel 81. The post-casting channel 81 can be a trough-type channel (the top opening is formed as its notch) or a hole-type channel; preferably, a hole-type post-casting channel 81 is adopted, that is, the notch of the post-casting groove 811 faces the other arch plate 12 (the upper and lower edges of the notch of the post-casting groove 811 are respectively aligned with the upper and lower plate surfaces of the arch plate 12) There is a certain spacing between the two sides), and a pouring port 82 connected to the post-casting groove 811 is provided on the upper plate surface of the arch plate 12. Concrete can be poured into the hole-type post-casting channel 81 through the pouring port 82. The pouring port 82 can be provided on only one of the arch plates 12, or both arch plates 12 can be provided with the pouring port 82 and the two pouring ports 82 at the splicing node can be spliced ​​to form a post-casting hole connected to the post-casting channel 81. There can be multiple pouring ports 82 on each arch plate 12. It can be understood that for the splicing between two adjacent side wall plates 11, it is not necessary to provide the above-mentioned pouring port 82, and the concrete pouring operation can be carried out from the top of the post-casting channel 81.

[0042] The above-mentioned splicing structure can reliably connect adjacent panels and facilitate construction, ensuring that the prefabricated underground station can meet the structural design requirements.

[0043] In particular, the above-mentioned post-cast channel 81 is connected with the step structure at the transverse free end of the above-mentioned vault plate, so that the post-cast concrete at the splicing node between the two adjacent vault plates 12 and the cast-in-place concrete at the connection node between the vault plate 12 and the external vault segment 2 can be connected as one, which can effectively improve the structural integrity and stress-bearing performance of the station vault.

[0044] Furthermore, if Figure 6 and Figure 7 The longitudinal reinforcement 83 in the vault plate 12 can extend into the above-mentioned post-cast channel 81 to improve the bonding force between the vault plate 12 and the post-cast concrete at the splicing node.

[0045] Furthermore, when a transverse connecting steel plate 72 is provided on the vault plate 12, the transverse connecting steel plate 72 further includes two assembled wing plates respectively connected to the two longitudinal ends of the web plate, and at the joint node of the two vault plates 12, two adjacent assembled wing plates abut against each other and are fixedly connected as a whole by assembling bolts. This structure can further improve the structural integrity and coordinated force bearing capacity of the station vault.

[0046] It is understandable that the above-mentioned splicing structure can also be used between two adjacent external arch segments 2, which will not be described in detail here.

[0047] To further optimize the above-mentioned prefabricated arch angle plate 1, the side wall connection structure at the bottom end of the above-mentioned side wall plate 11 needs to be connected to the external side wall segment. The side wall connection structure can refer to the above-mentioned arch connection structure. For example, in the case where the external side wall segment is a cast-in-place structure, the above-mentioned side wall connection structure can be a vertical steel bar 93 extending from the bottom end of the side wall plate 11. In the case where the external side wall segment is also a prefabricated structure, a tongue-and-groove connection structure can be used; or, the side wall connection structure includes a plurality of vertical bolt sleeves 91 embedded in the bottom end of the side wall plate 11; or, the side wall connection structure includes a vertical connection steel plate 92 fixed to the bottom end of the side wall plate 11, and a plurality of vertical bolt through holes are provided at the vertical free end of the vertical connection steel plate 92. The specific connection scheme between the side wall connection structure and the adjacent side wall segments will not be described here.

[0048] Unlike the easy operation of cast-in-place concrete when connecting the vault plate 12 and the external vault segment 2, it is difficult to cast in-place concrete at the connection node when connecting the side wall plate 11 and the external side wall segment. In this embodiment, the following preferred solution is adopted to facilitate the cast-in-place operation of concrete and ensure the quality of concrete pouring:

[0049] like Figure 8, the side wall plate 11 is provided with a grouting hole 94, and the grouting hole 94 passes through the top and bottom of the side wall plate 11 respectively; or, the side wall plate 11 is provided with a grouting hole 94 and a grouting channel connected with the grouting hole 94, and the grouting hole 94 passes through the bottom of the side wall plate 11, and the entrance and exit of the grouting channel are both opened on the station side wall surface of the side wall plate 11. This design is suitable for completing the connection between the side wall plate 11 and the side wall segment below, and concrete can enter the node between the side wall plate 11 and the side wall segment through the grouting hole 94. Therefore, the width of the upper wing plate of the vertical connection steel plate 92 needs to be smaller than the width of the side wall plate 11 to reserve the opening position of the grouting hole 94, or a corresponding grouting avoidance hole is opened on the upper wing plate. The above-mentioned grouting hole 94 can be formed by pre-embedded grouting sleeve 94 in the side wall panel 11; when a grouting channel is provided, the above-mentioned grouting channel can be formed by pre-embedded grouting pipe 95 and grouting pipe 96 in the side wall panel 11, one end of the grouting pipe 95 is connected with the grouting sleeve 94 and the other end passes through the station side wall surface of the side wall panel 11 to form the grouting channel entrance, one end of the grouting pipe 96 is connected with the grouting sleeve 94 and the other end passes through the station side wall surface of the side wall panel 11 to form the grouting channel exit. In this scheme, part of the vertical steel bars 93 in the side wall segment can be extended into the above-mentioned grouting holes 94, which can improve the structural strength and structural integrity at the node; further, part of the vertical steel bars 93 in the side wall panel 11 extend downward, and part of the vertical steel bars 93 in the side wall segment extend upward and are welded to the downward vertical steel bars 93 of the side wall panel 11, which can further improve the structural strength and structural integrity at the node. The steel bar welding structure is generally located on the station side of the vertical connecting steel plate 92 for easy operation.

[0050] Embodiment 2

[0051] like Figure 1 The embodiment of the present invention provides an assembled underground station, including a station floor 5, a station middle plate and two sets of side wall structures, wherein the side wall structure includes a plurality of side wall segments sequentially spliced ​​along the longitudinal direction of the station, and also includes a plurality of arch segments 2 and a plurality of prefabricated arch corner plates 1 provided in the first embodiment above.

[0052] The prefabricated arch corner panels 1 on each side are spliced ​​in sequence along the longitudinal direction of the station; the arch panels 12 are correspondingly connected with the arch segments 2 to form the station arch, and the side wall panels 11 on each side are connected with the side wall segments on the corresponding side to form the station side walls.

[0053] The station floor 5, station middle plate and side wall segments can be cast-in-place structures. Figure 1The underground station includes a plurality of middle plate segments 4 and a plurality of prefabricated side wall middle plate node plates 3, wherein the prefabricated side wall middle plate node plates 3 include a middle side wall segment and a middle plate plate vertically connected to the middle side wall segment, and the middle side wall segment and the middle plate plate are prefabricated as a whole, and each middle plate plate is correspondingly connected to each middle plate segment 4 to form a station middle plate, and the top end of the middle side wall segment is connected to the above-mentioned side wall plate 11, and the bottom end of the middle side wall segment is connected to the station floor 5 or to the lower side wall segment arranged on the station floor 5.

[0054] By prefabricating the middle side wall segment and the middle plate section as a whole, the assembled construction of underground stations can be further realized, especially the assembled construction of the station middle plate, and the strength and construction quality of the connection nodes between the station middle plate and the station side wall can be effectively improved, thereby ensuring the engineering quality and operational safety of the assembled underground station.

[0055] For the connection between the middle plate plate and the middle plate segment 4, reference may be made to the connection solution between the above-mentioned arch plate 12 and the arch segment 2, which will not be described in detail here.

[0056] Preferably, a lower side wall segment is arranged on the bottom plate and connected to the middle side wall segment. For the connection between the lower side wall segment and the middle side wall segment, reference may be made to the connection scheme between the side wall plate 11 and the middle side wall segment, which will not be elaborated here.

[0057] In particular, for the above-mentioned prefabricated underground station, after all its prefabricated components are assembled, the concrete pouring operation at each connection node and each longitudinal splicing node can be completed at the same time, which can not only significantly shorten the construction period, but also improve the structural integrity of the prefabricated underground station.

[0058] 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. An assembled underground station, comprising a station floor, a station middle plate and two sets of side wall structures, wherein the side wall structures comprise a plurality of side wall segments sequentially spliced ​​along the longitudinal direction of the station, characterized in that: It also includes a plurality of vault segments and a plurality of prefabricated arch corner panels. The prefabricated arch corner plate comprises an arch plate and a side wall plate connected to the arch plate, wherein the arch plate is a curved plate and is prefabricated integrally with the side wall plate, a transverse free end of the arch plate is provided with an arch connection structure for connecting with an arch segment, and a bottom end of the side wall plate is provided with a side wall connection structure for connecting with a side wall segment; The prefabricated arch angle plates on each side are sequentially spliced ​​along the longitudinal direction of the station; the arch panels and arch segments are correspondingly connected to form the station arch, and the side wall panels on each side are connected to the side wall segments on the corresponding side to form the station side walls; The vault plate is provided with plate transverse reinforcements, which extend from the transverse free end of the vault plate and are distributed on the upper and lower sides of the vault connection structure; the vault segments are also provided with segment transverse reinforcements correspondingly; The transverse free end of the vault plate adopts a step structure, which is formed at the top of the vault plate and is narrow at the top and wide at the bottom. The plate transverse reinforcement at the top of the vault plate extends from the vertical connection surface of the step structure and the extension length is less than the width of the lower step surface. Some segment transverse reinforcements extend to the step structure and are welded to the plate transverse reinforcement there. When pouring concrete in situ, the concrete also fills the step structure. The corresponding end of the vault segment adopts a step structure, which is formed at the bottom of the vault segment and is wide at the top and narrow at the bottom. The segment transverse reinforcement of the vault segment extends from the vertical connection surface of the step structure and extends to the transverse free end of the vault plate. The plate transverse reinforcement extends to the step structure and overlaps with the segment transverse reinforcement. When pouring concrete in situ, the concrete also fills the step structure.

2. The assembled underground station according to claim 1, characterized in that: The arch connection structure includes a plurality of transverse bolt sleeves embedded in the transverse free end of the arch plate; or, the arch connection structure includes a transverse connecting steel plate fixed to the transverse free end of the arch plate, and a plurality of transverse bolt through holes are provided at the transverse free end of the transverse connecting steel plate.

3. The assembled underground station according to claim 2, characterized in that: When the arch connection structure includes a plurality of transverse bolt sleeves, each transverse bolt sleeve is anchored by a pre-buried anchor bar embedded in the arch plate.

4. The assembled underground station according to claim 2, characterized in that: When the arch connection structure includes a transverse connecting steel plate, the transverse connecting steel plate includes a web and a mounting end wing plate and a connecting end wing plate respectively connected to the two transverse ends of the web, wherein the mounting end wing plate is buried in the transverse free end of the arch plate and anchored by an anchor steel bar buried in the arch plate, and the bolt through hole is opened on the connecting end wing plate.

5. The assembled underground station according to claim 1, characterized in that: The side wall connection structure includes a plurality of vertical bolt sleeves embedded in the bottom end of the side wall panel; or, the side wall connection structure includes a vertical connection steel plate fixed to the bottom end of the side wall panel, and a plurality of vertical bolt through holes are provided at the vertical free end of the vertical connection steel plate.

6. The assembled underground station according to claim 5, characterized in that: The side wall plate is provided with grouting holes, and the grouting holes pass through the top and bottom ends of the side wall plate respectively; or, the side wall plate is provided with grouting holes and grouting channels connected to the grouting holes, and the grouting holes pass through the bottom end of the side wall plate, and the entrance and exit of the grouting channel are both opened on the station side wall surface of the side wall plate.

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