Prefabricated side wall middle plate node plate and assembled underground station

Abstract

The present invention relates to a prefabricated side wall middle plate node plate, comprising a side wall plate and a middle plate plate, wherein the middle plate plate is vertically connected to the wall surface of the side wall plate, and the side wall plate and the middle plate plate are prefabricated as one piece, a lateral free end of the middle plate plate is provided with a middle plate connection structure for connecting to an external middle plate segment, and the top and bottom ends of the side wall plate are respectively provided with side wall connection structures for connecting to an external side wall segment or a station structure plate. It also relates to an assembled underground station using the prefabricated side wall middle plate node plate. The present invention can realize the assembled construction of underground stations, especially the assembled construction of station middle plates, by prefabricating the side wall plates and the middle plate plates as one piece, and then connecting the side wall plates with adjacent external side wall segments and connecting the middle plate plates with external middle plate segments, thereby effectively improving the strength and construction quality of the connection nodes between the station middle plates and the station side walls, and ensuring the engineering quality and operational safety of the assembled underground stations.

Description

Technical Field

[0001] The present invention belongs to the field of construction engineering technology, in particular to the field of underground station construction technology, and specifically to a prefabricated side wall middle plate node plate and an assembled underground station using the prefabricated side wall middle plate node 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 multiple 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, prefabricated construction of underground stations has also been promoted, significantly improving the construction efficiency and quality of underground stations and the working environment. However, currently, it is not possible to fully prefabricate underground stations. For example, station center panels are generally cast in place. If prefabricated parts are also used for station center panels, the strength of the connection points between them and the station side walls and the construction quality are difficult to guarantee. Summary of the Invention

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

[0005] The present invention relates to a prefabricated side wall middle plate node plate, comprising a side wall panel and a middle plate panel, wherein the middle plate panel is vertically connected to the wall surface of the side wall panel, and the side wall panel and the middle plate panel are prefabricated integrally, the transverse free end of the middle plate panel is provided with a middle plate connection structure for connecting to an external middle plate segment, and the top and bottom ends of the side wall panel are respectively provided with side wall connection structures for connecting to an external side wall segment or a station structure panel.

[0006] As one of the embodiments, the middle plate connection structure includes a plurality of transverse bolt sleeves embedded in the transverse free end of the middle plate; or, the middle plate connection structure includes a transverse connecting steel plate fixed to the transverse free end of the middle 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 middle plate connection structure includes a plurality of transverse bolt sleeves, each transverse bolt sleeve is anchored by a pre-buried anchor bar embedded in the middle plate section.

[0008] As one of the embodiments, when the middle plate 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 middle plate plate and anchored by the anchor steel bar buried in the middle plate 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 middle plate section, the transverse reinforcements extend from the transverse free ends of the middle plate section, and the transverse reinforcements are distributed on the upper side and / or the lower side of the middle plate connection structure.

[0010] As one of the embodiments, the side wall connection structure includes a plurality of vertical bolt sleeves embedded in the corresponding ends of the side wall panels; or, the side wall connection structure includes a vertical connecting steel plate fixed to the corresponding ends of the side wall panels, and a plurality of vertical bolt through holes are provided at the vertical free ends of the vertical connecting steel plates.

[0011] As one of the implementation modes, a grouting hole and a grouting channel connected to the grouting hole are provided in the side wall panel, the grouting hole passes through 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] As one of the implementation modes, vertical steel bars are provided in the side wall panels, and the vertical steel bars extend from at least the top end of the side wall panels.

[0013] As one of the implementation methods, a corbel for installing a rail top air duct is prefabricated on the station side wall surface of the side wall panel.

[0014] The present invention also relates to an assembled underground station, comprising:

[0015] A station floor and two sets of lower side wall structures provided on both sides of the station floor, wherein the lower side wall structures include a plurality of lower side wall segments sequentially spliced ​​along the longitudinal direction of the station;

[0016] A station roof and two sets of upper side wall structures provided on both sides of the station roof, wherein the upper side wall structures include a plurality of upper side wall segments sequentially spliced ​​along the longitudinal direction of the station;

[0017] multiple mid-plate segments;

[0018] And a plurality of prefabricated side wall middle plate node plates as described above, each of the prefabricated side wall middle plate node plates on each side is spliced ​​in sequence along the longitudinal direction of the station; each of the middle plate panels and each of the middle plate segments are connected correspondingly to form the station middle plate, and each of the side wall panels on each side is connected with each upper side wall segment and each lower side wall segment on the corresponding side to form the station side wall.

[0019] The present invention has at least the following beneficial effects:

[0020] The present invention prefabricates the side wall panels and the middle plate panels as a whole, and then connects the side wall panels with the adjacent external side wall segments and the middle plate panels with the external middle plate segments. This can achieve the assembled construction of underground stations, especially the assembled construction of the station middle plate, and can effectively improve the connection node strength and construction quality between the station middle plate and the station side wall, thereby ensuring the engineering quality and operational safety of the assembled underground station. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative work.

[0022] Figure 1 A schematic structural diagram of an assembled underground station provided by an embodiment of the present invention;

[0023] Figure 2 A schematic structural diagram of a prefabricated side wall mid-slab gusset plate provided in an embodiment of the present invention;

[0024] Figure 3 A schematic diagram of the connection structure between the middle plate panels and the middle plate segments provided in an embodiment of the present invention;

[0025] Figure 4 for Figure 3 Middle AA section view;

[0026] Figure 5 for Figure 3 Middle BB cross-section;

[0027] Figure 6 for Figure 3 Middle CC section view;

[0028] Figure 7 for Figure 3 Middle DD section view;

[0029] Figure 8 Schematic diagram of the connection structure between the side wall panel and the lower side wall segment provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0030] The following is a clear and complete description of 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 making any creative efforts are within the scope of protection of the present invention.

[0031] Example 1

[0032] like Figure 1 and Figure 2 An embodiment of the present invention provides a prefabricated side wall middle plate node plate 1, comprising a side wall panel 11 and a middle plate panel 12, wherein the middle plate panel 12 is vertically connected to the wall surface of the side wall panel 11, and the side wall panel 11 and the middle plate panel 12 are prefabricated as one piece, and the lateral free end of the middle plate panel 12 is provided with a middle plate connection structure for connecting to an external middle plate segment 2, and the top and bottom ends of the side wall panel 11 are respectively provided with side wall connection structures for connecting to an external side wall segment or a station structure panel.

[0033] Generally, the side wall panels 11 and the middle panel panels 12 are both made of reinforced concrete. The prefabrication process of the prefabricated side wall middle panel gusset plate 1 is conventional technology and will not be described in detail here.

[0034] In one embodiment, Figure 1 and Figure 2 The upper surface of the middle panel 12 is perpendicular to the wall surface of the side wall panel 11, and the lower surface of the middle panel 12 is chamfered at the intersection with the side wall panel 11. This can improve the structural strength of the connection between the middle panel 12 and the side wall panel 11 and enhance the load-bearing performance of the middle panel 12. Preferably, the middle panel 12 is located between the top and bottom ends of the side wall panel 11, that is, the upper surface of the middle panel 12 is located below the top end of the side wall panel 11.

[0035] Alternatively, as Figure 1 and Figure 2 The station side wall surface of the side wall panel 11 is prefabricated with a bracket 13 for installing the rail top air duct. The duct bottom plate of the rail top air duct can be directly supported on the bracket 13, which is convenient for the assembly construction of the rail top air duct.

[0036] This embodiment provides a prefabricated side wall middle plate node plate 1, which prefabricates the side wall panel 11 and the middle plate panel 12 into an integral body, and then connects the side wall panel 11 with the adjacent external side wall segment and connects the middle plate panel 12 with the external middle plate segment 2, thereby realizing the assembled construction of the underground station, especially the assembled construction of the station middle plate, and effectively improving the connection node strength and construction quality between the station middle plate and the station side wall, thereby ensuring the engineering quality and operational safety of the assembled underground station.

[0037] The above-mentioned middle plate segment 12, as part of the station middle plate, needs to be connected to the external middle plate segment 2. This external middle plate segment 2 can be a cast-in-place structure, and the middle plate connection structure can be transverse reinforcement 74 extending beyond the transverse free end of the middle plate segment 12. However, it is preferred that the external middle plate segment 2 also be prefabricated to improve the construction efficiency of the underground station.

[0038] For the connection between the middle plate plate 12 and the prefabricated peripheral middle plate segment 2, a tongue-and-groove connection structure can be used. As a preferred solution of this embodiment, Figure 3-Figure 5 The middle plate connection structure includes a plurality of transverse bolt sleeves 71 embedded in the transverse free end of the middle plate plate 12; or, the middle plate connection structure includes a transverse connecting steel plate 72 fixed to the transverse free end of the middle plate plate 12, and a plurality of transverse bolt through holes are provided at the transverse free end of the transverse connecting steel plate 72. When the cam 72 is in the closed position, the cam 72 is in the closed position, and the cam 72 is in the closed position, so that the cam 72 can be fixed to the cam 72 by the cam 72.

[0039] More preferably, Figure 3 and Figure 5 When the mid-plate connection structure includes multiple transverse bolt sleeves 71, each transverse bolt sleeve 71 is anchored by pre-embedded anchor bars 73 embedded in the mid-plate segment 12. This ensures the structural strength and mechanical properties of the transverse bolt sleeve 71 embedded in the mid-plate segment 12, thereby ensuring the structural strength and operational reliability of the connection between the transverse bolt sleeve 71, the transverse connecting steel plate 72, and the bolts. Similarly, when the transverse bolt sleeve 71 is embedded in the peripheral mid-plate segment 2, the above-mentioned anchoring structure can be used.

[0040] Further preferably, when the middle plate connection structure includes a transverse connecting steel plate 72, the transverse connecting steel plate 72 includes a web and mounting end wing plates and connecting end wing plates respectively connected to the two transverse ends of the web, wherein the mounting end wing plates are embedded in the transverse free ends of the middle plate section 12 and anchored by anchor bars embedded in the middle plate section 12, and the bolt holes are provided in the connecting end wing plates. The transverse connecting steel plate 72 is embedded in the middle plate section 12 during the prefabrication of the side wall middle plate node plate 1. The embedding of the mounting end wing plates in the middle plate section 12 can improve the bonding strength and integral load-bearing performance between the mounting end wing plates and the middle plate section 12; the connecting end wing plates are used to abut against the external middle plate segment 2. Stiffening ribs can be provided on the web to increase the structural strength and rigidity of the transverse connecting steel plate 72, thereby improving the load-bearing performance of the station middle plate. Similarly, when the transverse connecting steel plate 72 is installed on the external middle plate segment 2, the above-mentioned installation structure can be adopted.

[0041] 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 middle plate, it is convenient to facilitate the assembly construction between the above-mentioned side wall middle plate node plate 1 and the above-mentioned external middle plate segment 2. The bolts can be screwed into the transverse bolt sleeve 71 by using operating tools such as a manipulator, 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 middle plate section 12 and the external middle plate segment 2 can be guaranteed, thereby improving the construction quality.

[0042] When the above-mentioned middle plate panel 12 is connected to the external middle plate segment 2, after completing the assembly structure of the above-mentioned transverse bolt sleeve 71-transverse connecting steel plate 72 and bolts, concrete is poured into the connection node between the middle plate panel 12 and the external middle plate segment 2. On the one hand, the upper surface of the station middle plate 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. Among them, preferably, a transverse steel bar 74 is provided in the middle plate panel 12, and the transverse steel bar 74 extends from the transverse free end of the middle plate panel 12. The transverse steel bar 74 is distributed on the upper side and / or lower side of the middle plate 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 bar 74, which can improve the bonding force and coordinated stress performance between the middle plate panel 12 and the cast-in-place concrete; such as Figure 4 and Figure 5 Preferably, transverse reinforcement bars 74 extend from the upper and lower sides of the middle plate connection structure.

[0043] Further, if Figure 4 and Figure 5, the above-mentioned external middle plate segment 2 also has correspondingly extended transverse steel bars 74, which can also improve the bonding strength and coordinated force-bearing capacity between the external middle plate segment 2 and the cast-in-place concrete. The following defines the transverse steel bars 74 of the middle plate plate 12 as plate transverse steel bars 74, and defines the transverse steel bars 74 of the external middle plate segment 2 as segment transverse steel bars 74; wherein, preferably, on the upper side of the middle plate 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, especially since the middle plate plate 12 and the side wall plate 11 are prefabricated as a whole, after the side wall plate 11 is connected to the station floor 3 and the lower side wall segment 4 on the station floor 3, the above-mentioned steel bar welding operation is performed on the middle plate plate 12, and there is sufficient construction space; further, as Figure 4 and Figure 5 The free transverse ends of the middle plate segments 12 employ a stepped structure. This stepped structure is formed at the top of the middle plate segment 12 and is narrow at the top and wide at the bottom. Transverse plate reinforcement 74 at the top of the middle plate segment 12 extends from the vertical connection surface of the stepped structure, with the extension length being less than the width of the lower step surface. The segmented transverse reinforcement 74 extends to the stepped structure and is welded to the plate transverse reinforcement 74, facilitating operation. Furthermore, during in-situ concrete pouring, the concrete also fills the stepped structure, which not only improves the bond between the middle plate segment 12 and the cast-in-situ concrete but also allows the cast-in-situ concrete to partially interlock and rest on the middle plate segment 12. This provides support and restraint for the cast-in-situ concrete, improving the bearing capacity and operational reliability of the joint. Welding the plate transverse reinforcement 74 on the upper side of the middle plate connection structure to the segmented transverse reinforcement 74 ensures structural strength and shear resistance at the joint.

[0044] Optionally, at the lower side of the middle plate connection structure, the plate transverse reinforcement 74 is overlapped with the segment transverse reinforcement 74 to facilitate construction operations. Figure 4 and Figure 5The corresponding ends of the aforementioned external middle plate segments 2 utilize a stepped structure. This stepped structure is formed at the bottom of the external middle plate segments 2 and is wide at the top and narrow at the bottom. The segment transverse reinforcement bars 74 of the external middle plate segments 2 extend from the vertical connection surface of the stepped structure and extend to the free transverse end of the middle plate plate 12. The plate transverse reinforcement bars 74 extend to the stepped structure and overlap with the segment transverse reinforcement bars 74. This structure, on the one hand, increases the reinforcement overlap length, improving the structural strength and operational reliability of the node. On the other hand, during in-situ concrete casting, the concrete also fills the stepped structure, which not only improves the bonding strength between the external middle plate segments 2 and the cast-in-situ concrete, but also partially interlocks and rests on the cast-in-situ concrete. Therefore, the cast-in-situ concrete provides a supporting and restraining effect on the external middle plate segments 2, thereby improving the load-bearing capacity of the external middle plate segments 2. This is particularly true in the design of underground stations without support columns, enabling the external middle plate segments 2 to meet structural stress requirements and ensure safe station operations.

[0045] It is understood that within the longitudinal length of the underground station (the longitudinal direction of the station is parallel to the longitudinal direction of the tracks), multiple prefabricated side wall mid-plate gusset plates 1 are spliced ​​together on each lateral side of the station to facilitate the production, transportation, storage, and on-site construction of prefabricated parts. Within two adjacent prefabricated side wall mid-plate gusset plates 1, the two mid-plate sections 12 are spliced ​​together, and the two side wall sections 11 are spliced ​​together. The splicing structure can adopt a conventional tongue-and-groove splicing structure. In this embodiment, the following splicing structure is preferably adopted:

[0046] Take the splicing of two adjacent middle plate panels 12 as an example. Figure 3 、 Figure 6 and Figure 7 , each middle plate 12 is provided with a post-casting groove 811 at both longitudinal ends. When two middle plate 12 are spliced ​​together, 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 middle plate 12 (the upper and lower edges of the notch of the post-casting groove 811 are respectively at a certain angle to the upper and lower plate surfaces of the middle plate 12). Spacing), a pouring port 82 connected to its post-casting trough 811 is provided on the upper surface of the middle plate 12. Concrete can be poured into the hole-type post-casting channel 81 through this pouring port 82. The pouring port 82 can be provided on only one middle plate 12, or on both middle plates 12, and the two pouring ports 82 at the joint are combined to form a post-casting hole connected to the post-casting channel 81. Each middle plate 12 can have multiple pouring ports 82. It is understandable that for the splicing between two adjacent side wall plates 11, the aforementioned pouring port 82 is not necessary, and concrete pouring can be carried out from the top of the post-casting channel 81.

[0047] 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.

[0048] In particular, the above-mentioned post-cast channel 81 is connected with the step structure at the transverse free end of the above-mentioned middle plate panel 12, so that the post-cast concrete at the splicing node between the two adjacent middle plate panels 12 and the cast-in-place concrete at the connection node between the middle plate panel 12 and the external middle plate segment 2 can be connected as one, which can effectively improve the structural integrity and stress-bearing performance of the station middle plate.

[0049] Further, if Figure 6 and Figure 7 The longitudinal reinforcement 83 in the middle plate 12 can extend into the above-mentioned post-casting channel 81 to improve the bonding strength between the middle plate 12 and the post-cast concrete at the splicing node.

[0050] Furthermore, when the center plate 12 is provided with a transverse connecting steel plate 72, the transverse connecting steel plate 72 also includes two assembled wing plates connected to the longitudinal ends of the web. At the joint between the two center plate 12s, the adjacent assembled wing plates abut against each other and are fixed together by assembly bolts. This structure can further improve the structural integrity and coordinated load-bearing capacity of the station center plate.

[0051] It is understandable that the above-mentioned splicing structure can also be used between two adjacent peripheral middle plate segments 2, which will not be described in detail here.

[0052] To further optimize the above-mentioned prefabricated side wall middle plate node plate 1, the side wall connection structure at the bottom end of the above-mentioned side wall panel 11 needs to be connected to the station floor 3 or to the lower side wall segment 4 provided on the station floor 3, and the side wall connection structure at the top end of the side wall panel 11 needs to be connected to the station roof 5 or to the upper side wall segment 6 provided on the station roof 5. The above-mentioned side wall connection structure can refer to the above-mentioned middle plate connection structure, that is, the side wall connection structure includes a plurality of vertical bolt sleeves 91 pre-embedded in the corresponding ends of the side wall panel 11; or, the side wall connection structure includes a vertical connection steel plate 92 fixed to the corresponding ends of the side wall panel 11, and a plurality of vertical bolt through holes are provided at the vertical free ends of the vertical connection steel plate 92; the specific connection scheme between the side wall connection structure and the adjacent side wall segments / station structure panels will not be described in detail here.

[0053] Unlike the easy operation of pouring concrete in situ when connecting the middle plate 12 and the external middle plate segment 2, it is difficult to pour concrete in situ at the connection node when connecting the side wall 11 and the external side wall segment / station structure plate. In this embodiment, the following preferred solution is adopted to facilitate the pouring of concrete in situ and ensure the quality of concrete pouring:

[0054] like Figure 8 The side wall panel 11 is provided with a grouting hole 94 and a grouting channel connected to the grouting hole 94. The grouting hole 94 extends through the bottom end of the side wall panel 11, and the entrance and exit of the grouting channel are both located on the station side wall surface of the side wall panel 11. This design is suitable for completing the connection between the side wall panel 11 and the lower side wall segment 4 / station floor 3. Concrete can enter the node between the side wall panel 11 and the lower side wall segment 4 / station floor 3 through the grouting channel-grouting hole 94. Therefore, the width of the upper wing plate of the vertical connecting steel plate 92 needs to be smaller than the width of the side wall panel 11 to reserve space for the grouting hole 94, or corresponding grouting avoidance holes should be provided on the upper wing plate. The above-mentioned grouting hole 94 can be formed by pre-embedding a grouting sleeve 94 in the side wall panel 11, and the above-mentioned grouting channel can be formed by pre-embedding a grouting pipe 95 and a grouting pipe 96 in the side wall panel 11. One end of the grouting pipe 95 is connected to the grouting sleeve 94 and the other end passes through the station side wall surface of the side wall panel 11 to form a grouting channel entrance. One end of the grouting pipe 96 is connected to the grouting sleeve 94 and the other end passes through the station side wall surface of the side wall panel 11 to form a grouting channel outlet. In this scheme, part of the vertical steel bars 93 in the lower side wall segment 4 / station floor 3 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 lower side wall segment 4 / station floor 3 extend upward and are welded to the lower 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.

[0055] Similarly, for the connection between the side wall panel 11 and the upper side wall segment 6, the above-mentioned grouting holes 94 and grouting channels can be set on the upper side wall segment 6, and some vertical steel bars 93 in the side wall panel 11 can extend from the top of the side wall panel 11 to the grouting holes 94 in the upper side wall segment 6; the node between the two can obviously also adopt the above-mentioned vertical steel bar welding structure, which will not be elaborated here.

[0056] Obviously, it is also a feasible solution to open a vertically penetrating grouting hole on the side wall plate 11 / upper side wall segment 6 and perform grouting from the top of the grouting hole.

[0057] Example 2

[0058] like Figure 1 , an embodiment of the present invention provides an assembled underground station, comprising:

[0059] The station floor 3 and two sets of lower side wall structures provided on both sides of the station floor 3, wherein the lower side wall structures include a plurality of lower side wall segments 4 sequentially spliced ​​along the longitudinal direction of the station;

[0060] A station roof 5 and two sets of upper side wall structures provided on both sides of the station roof 5, wherein the upper side wall structures include a plurality of upper side wall segments 6 sequentially spliced ​​along the longitudinal direction of the station;

[0061] multiple mid-plate segments 2;

[0062] And multiple prefabricated side wall middle plate node plates 1 provided in the above-mentioned embodiment 1, each of the prefabricated side wall middle plate node plates 1 on each side is spliced ​​in sequence along the longitudinal direction of the station; each of the middle plate panels 12 is correspondingly connected with each of the middle plate segments 2 to form the station middle plate, and each of the side wall panels 11 on each side is connected with each upper side wall segment 6 and each lower side wall segment 4 on the corresponding side to form the station side wall.

[0063] The connection between the middle plate panels 12 and the middle plate segments 2, and the connection between the side wall panels 11 and the upper side wall segments 6 and lower side wall segments 4 are all described in the first embodiment above and are not repeated here. The splicing between the middle plate panels 12, the splicing between the middle plate segments 2, and the splicing between the side wall panels 11 are all described in the first embodiment above and are not repeated here. The splicing between the upper side wall segments 6 and the splicing between the lower side wall segments 4 can refer to the splicing scheme between the side wall panels 11 and are not repeated here.

[0064] In particular, for the above-mentioned prefabricated underground station, after all its prefabricated components are assembled, the concrete pouring operations 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.

[0065] 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 principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An assembled underground station, characterized in that: include: A station floor and two sets of lower side wall structures arranged on both sides of the station floor, wherein the lower side wall structures include a plurality of lower side wall segments sequentially spliced ​​along the longitudinal direction of the station; A station roof and two sets of upper side wall structures arranged on both sides of the station roof, wherein the upper side wall structures include a plurality of upper side wall segments sequentially spliced ​​along the longitudinal direction of the station; multiple mid-plate segments; and a plurality of prefabricated side wall middle plate node plates, wherein each of the prefabricated side wall middle plate node plates on each side is sequentially spliced ​​along the longitudinal direction of the station; the prefabricated side wall middle plate node plates include side wall panels and middle plate panels, wherein the middle plate panels are vertically connected to the wall surface of the side wall panels, and the side wall panels and the middle plate panels are integrally prefabricated, and the transverse free ends of the middle plate panels are provided with middle plate connection structures for connecting with middle plate segments, and the top and bottom ends of the side wall panels are respectively provided with side wall connection structures for connecting with side wall segments or station structural panels; each of the middle plate panels is correspondingly connected with each of the middle plate segments to form a station middle plate, and each of the side wall panels on each side is connected with each upper side wall segment and each lower side wall segment on the corresponding side to form a station side wall; The middle plate connection structure includes a plurality of transverse bolt sleeves embedded in the transverse free end of the middle plate plate, and a transverse connecting steel plate is installed on the middle plate segment accordingly; or, the middle plate connection structure includes a transverse connecting steel plate fixed to the transverse free end of the middle plate plate, and a transverse bolt sleeve is embedded in the middle plate segment accordingly; a plurality of transverse bolt through holes are provided at the transverse free end of the transverse connecting steel plate; when the middle plate plate is connected to the middle plate segment, after the assembly structure of the transverse bolt sleeve-transverse connecting steel plate and bolts is completed, concrete is cast in situ at the connection node between the middle plate plate and the middle plate segment; Both longitudinal ends of each middle plate block are provided with post-casting grooves. When two middle plate blocks are spliced, the two post-casting grooves at the splicing node are spliced ​​together to form a post-casting channel. The post-casting channel is connected to the connection node between the middle plate block and the middle plate segment, so that the post-cast concrete at the splicing node between two adjacent middle plate blocks and the cast-in-place concrete at the connection node between the middle plate block and the middle plate segment are connected as one. The middle plate plate is provided with plate transverse reinforcement, and the plate transverse reinforcement extends from the transverse free end of the middle plate plate; the middle plate segment is provided with segment transverse reinforcement, and the segment transverse reinforcement extends from the transverse free end of the middle plate segment; At the connection node between the middle plate plate and the middle plate segment, the transverse free end of the middle plate plate adopts a first step structure, which is formed at the top of the middle plate plate and is narrow at the top and wide at the bottom. The transverse reinforcement of the plate at the top of the middle plate plate extends from the vertical connection surface of the first step structure and the extension length is less than the width of the lower step surface. The segment transverse reinforcement extends to the first step structure and is welded to the plate transverse reinforcement, and the cast-in-place concrete also fills the first step structure; the corresponding end of the middle plate segment adopts a second step structure, which is formed at the bottom of the middle plate segment and is wide at the top and narrow at the bottom. The segment transverse reinforcement of the middle plate segment extends from the vertical connection surface of the second step structure and extends to near the transverse free end of the middle plate plate. The plate transverse reinforcement extends to the second step structure and overlaps with the segment transverse reinforcement, and the cast-in-place concrete also fills the second step structure.

2. The assembled underground station according to claim 1, characterized in that: When the middle plate connection structure includes a plurality of transverse bolt sleeves, each transverse bolt sleeve is anchored by a pre-buried anchor bar embedded in the middle plate plate.

3. The assembled underground station according to claim 1, characterized in that: When the middle plate 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 middle plate plate and anchored by an anchor steel bar buried in the middle plate plate, and the bolt through hole is opened on the connecting end wing plate.

4. 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 corresponding ends of the side wall panels; or, the side wall connection structure includes a vertical connection steel plate fixed to the corresponding ends of the side wall panels, and a plurality of vertical bolt through holes are provided at the vertical free ends of the vertical connection steel plate.

5. The assembled underground station according to claim 4, characterized in that: The side wall plate is provided with a grouting hole and a grouting channel connected with the grouting hole. The grouting hole passes through the bottom end of the side wall plate. The inlet and outlet of the grouting channel are both opened on the station side wall surface of the side wall plate.

6. The assembled underground station according to claim 4, characterized in that: The side wall plate is provided with vertical steel bars, and the vertical steel bars extend out from at least the top of the side wall plate.

7. The assembled underground station according to claim 1, characterized in that: The station side wall surface of the side wall plate is integrally prefabricated with a bracket for installing the rail top air duct.

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