Prefabricated metro station

Abstract

A prefabricated subway station includes a precast double-sided composite shear wall, a precast composite intermediate slab, and a cast-in-place joint connection passage. The precast double-sided composite shear wall contains a first and a second reinforcing bar. The first reinforcing bar extends into the precast composite intermediate slab and anchors to the reinforcement within the slab. The second reinforcing bar extends into the cast-in-place joint connection passage and anchors to the reinforcement within the passage. The precast composite intermediate slab contains a third reinforcing bar, which extends into the precast double-sided composite shear wall and anchors to the reinforcement within it. The cast-in-place joint connection passage contains a fourth and a fifth reinforcing bar. The fourth reinforcing bar extends into the precast composite intermediate slab and anchors to the reinforcement within it. The fifth reinforcing bar extends through a first reinforcing bar connector into the precast double-sided composite shear wall and anchors to the reinforcement within it.

Description

Technical Field

[0001] This application belongs to the field of building engineering technology, specifically relating to a prefabricated subway station. Background Technology

[0002] In actual engineering scenarios where subway stations have large openings at the top, the upper section of the side wall is significantly weakened due to the opening structure, and the shear force transmission capacity of the wall itself is greatly reduced, which puts forward higher requirements for the stress adaptability of the node structure.

[0003] Existing node structures, lacking specific design considerations for this type of large-opening weakened load condition, struggle to ensure stress continuity between the node area and the sidewall, especially given insufficient shear transfer capacity of the sidewall. They also fail to accommodate the abrupt stiffness changes present in sidewalls with large openings. Consequently, stress concentration easily occurs at the junction of the node and the sidewall, disrupting the overall stress coordination of the subway station's main structure and impacting its long-term stable service performance. Summary of the Invention

[0004] In view of this, this application provides a prefabricated subway station, which, through the combination of prefabricated components and cast-in-place connecting channels and the cross-component anchorage connection of multiple sets of steel bars, ensures the continuity of stress between the subway station nodes and side walls under the condition of large openings in the upper part, adapts to the abrupt stiffness characteristics of the side walls, eliminates the risk of stress concentration at the connection points, and improves the long-term stable service performance of the main structure.

[0005] To achieve the above objectives, this application mainly provides the following technical solutions: This application provides a prefabricated subway station, including a prefabricated double-sided composite shear wall, a prefabricated composite slab, and a cast-in-place joint connection passage; One end of the prefabricated composite middle plate is horizontally laid on top of the prefabricated double-sided composite shear wall, and the prefabricated composite middle plate and the prefabricated double-sided composite shear wall form an overlap node at the overlap position. The cast-in-place joint connection channel is located on the outside of the overlapping joint and is connected to both the side of the precast double-sided composite shear wall and the side of the precast composite middle plate, for connecting the precast double-sided composite shear wall and the precast composite middle plate. The precast double-sided composite shear wall has a first reinforcing bar and a second reinforcing bar. The first reinforcing bar extends into the interior of the precast composite middle slab and forms an anchorage connection with the reinforcement in the precast composite middle slab. The second reinforcing bar extends into the interior of the cast-in-place node connection channel and forms an anchorage connection with the reinforcement in the cast-in-place node connection channel. The precast composite slab has a third steel bar pre-reserved inside, which extends into the interior of the precast double-sided composite shear wall and forms an anchorage connection with the reinforcement inside the precast double-sided composite shear wall. The cast-in-place node connection channel is pre-reserved with a fourth and a fifth reinforcing bar. The fourth reinforcing bar extends into the interior of the precast composite slab and forms an anchorage connection with the reinforcement in the precast composite slab. The fifth reinforcing bar extends into the interior of the precast double-sided composite shear wall through the first reinforcing bar connector and forms an anchorage connection with the reinforcement in the precast double-sided composite shear wall.

[0006] Optionally, the precast double-sided composite shear wall includes two layers of precast concrete wall panels arranged opposite each other, forming an interlayer longitudinal cavity between the two layers of precast concrete wall panels. One end of the first reinforcing bar is inserted into the interlayer longitudinal cavity and fixedly connected to the reinforcement of the precast double-sided composite shear wall, and the other end is bent toward the precast composite middle slab to extend into the interior of the precast composite middle slab. One end of the second reinforcing bar is inserted into the interlayer longitudinal cavity and fixedly connected to the reinforcement of the precast double-sided composite shear wall, and the other end is bent toward the cast-in-place node connection channel to extend into the interior of the cast-in-place node connection channel.

[0007] Optionally, the precast composite intermediate slab, which is erected at the top of the precast double-sided composite shear wall, has a longitudinal cavity inside the slab. The third reinforcing bar extends from the longitudinal cavity in a direction perpendicular to the precast double-sided composite shear wall and extends into the interior of the precast double-sided composite shear wall to form an anchorage connection with the reinforcement inside the precast double-sided composite shear wall. The end of the third reinforcing bar located inside the precast double-sided composite shear wall is bent in a direction parallel to the precast composite intermediate slab.

[0008] Optionally, the top of the prefabricated double-sided composite shear wall is provided with a corbel protruding in the horizontal direction, and the corbel and the prefabricated double-sided composite shear wall are an integrated prefabricated structure; the prefabricated composite middle plate is erected on the top surface of the corbel, and the third reinforcing bar extends from the longitudinal cavity inside the plate, extends in a direction perpendicular to the prefabricated double-sided composite shear wall, and extends into the interior of the corbel.

[0009] Optionally, the fourth reinforcing bar extends horizontally toward the precast composite slab, and the end of the fourth reinforcing bar extending into the interior of the precast composite slab is bent toward the bottom surface of the precast composite slab.

[0010] Optionally, one end of the fifth reinforcing bar is fixedly connected to the reinforcement in the cast-in-place node connection channel, and the other end extends along the direction close to the precast double-sided composite shear wall and is fixedly connected to one end of the first reinforcing bar connector; the other end of the first reinforcing bar connector is embedded inside the precast double-sided composite shear wall and is connected to the pre-set connecting reinforcing bar in the precast double-sided composite shear wall.

[0011] Optionally, the end of the connecting steel bar away from the first steel bar connector is bent in a direction away from the precast composite slab.

[0012] Optionally, it also includes cast-in-place composite joint frame columns, the bottom of which is connected to the top of the precast double-sided composite shear wall.

[0013] Optionally, the bottom longitudinal reinforcement of the cast-in-place composite node frame column is connected to the pre-reserved reinforcement at the top of the precast double-sided composite shear wall via a second reinforcement connector.

[0014] Optionally, a sixth reinforcing bar is reserved in the precast double-sided composite shear wall. The sixth reinforcing bar extends into the interior of the cast-in-place composite node frame column and forms an anchorage connection with the reinforcement in the cast-in-place composite node frame column.

[0015] By employing the above technical solution, this application has at least the following beneficial effects: The prefabricated subway station provided in this application utilizes a collaborative structural design of precast double-sided composite shear walls, precast composite slabs, and cast-in-place joint connection channels. This design leverages a double anchoring structure: the first reinforcing bar pre-reserved within the precast double-sided composite shear wall extends into the precast composite slab to form an anchorage with the slab's reinforcement; and the third reinforcing bar pre-reserved within the precast composite slab extends into the precast double-sided composite shear wall to form an anchorage with the wall's reinforcement. This effectively strengthens the connection strength at the overlap between the precast double-sided composite shear wall and the precast composite slab, enhancing the shear force transfer capacity of the precast double-sided composite shear wall under conditions of large openings in the upper structure. Furthermore, the tight connection between the cast-in-place joint connection channels and the sides of the precast double-sided composite shear wall and the precast composite slab, combined with the extension of the second reinforcing bar pre-reserved within the precast double-sided composite shear wall... The system employs a multi-anchoring system: a fourth steel bar, pre-reserved within the cast-in-place node connection channel, extends into the precast composite slab and forms an anchoring connection with the reinforcement within the slab; and a fifth steel bar, pre-reserved within the cast-in-place node connection channel, extends through the first steel bar connector into the precast double-sided composite shear wall and forms an anchoring connection with the reinforcement within the wall. This system eliminates the abrupt stiffness change in the overlap area between the precast double-sided composite shear wall and the precast composite slab, ensuring the continuity of stress among the three components: the precast double-sided composite shear wall, the precast composite slab, and the cast-in-place node connection channel. It also avoids stress concentration at the connection points between the node and the precast double-sided composite shear wall, thereby improving the overall stress coordination of the subway station's main structure and ensuring its long-term stable service performance. Attached Figure Description

[0016] Figure 1This is a structural schematic diagram of a column-free location in a prefabricated subway station according to an optional embodiment of this application; Figure 2 This is a structural diagram of a prefabricated subway station with column locations, representing an optional embodiment of this application.

[0017] The reference numerals in the attached figures are as follows: 100. Precast double-sided composite shear wall; 101. Corbel; 200. Precast composite intermediate slab; 300. Cast-in-place joint connection channel; 400. Cast-in-place composite joint frame column; 500. First rebar connector; 600. Second rebar connector; 1. First reinforcing bar; 2. Second reinforcing bar; 3. Third reinforcing bar; 4. Fourth reinforcing bar; 5. Fifth reinforcing bar; 6. Sixth reinforcing bar. Detailed Implementation

[0018] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0020] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0021] The preferred embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0022] See Figure 1 and Figure 2 As shown, according to an embodiment of this application, a prefabricated subway station is provided, including a prefabricated double-sided composite shear wall 100, a prefabricated composite intermediate slab 200, and a cast-in-place node connection channel 300; one end of the prefabricated composite intermediate slab 200 is horizontally erected on top of the prefabricated double-sided composite shear wall 100, and the prefabricated composite intermediate slab 200 and the prefabricated double-sided composite shear wall 100 form an overlap node at the overlap position; the cast-in-place node connection channel 300 is disposed outside the overlap node and is connected to both the side of the prefabricated double-sided composite shear wall 100 and the side of the prefabricated composite intermediate slab 200, for connecting the prefabricated double-sided composite shear wall 100 and the prefabricated composite intermediate slab 200; wherein, a first reinforcing bar 1 and a second reinforcing bar 2 are reserved in the prefabricated double-sided composite shear wall 100, and the first reinforcing bar 1 extends to the prefabricated composite intermediate slab 2. Inside the precast composite slab 200, the second reinforcing bar 2 extends into the cast-in-place node connection channel 300 and forms an anchorage connection with the reinforcement within the channel. A third reinforcing bar 3 is reserved inside the precast composite slab 200, extending into the precast double-sided composite shear wall 100 and forming an anchorage connection with the reinforcement within the wall. A fourth reinforcing bar 4 and a fifth reinforcing bar 5 are reserved inside the cast-in-place node connection channel 300. The fourth reinforcing bar 4 extends into the precast composite slab 200 and forms an anchorage connection with the reinforcement within the wall. The fifth reinforcing bar 5 extends through the first reinforcing bar 1 connector 500 into the precast double-sided composite shear wall 100 and forms an anchorage connection with the reinforcement within the wall.

[0023] The prefabricated subway station provided in this embodiment utilizes a collaborative structural design of prefabricated double-sided composite shear walls 100, prefabricated composite slabs 200, and cast-in-place joint connection channels 300. The design leverages the first reinforcing bar 1 pre-reserved within the prefabricated double-sided composite shear walls 100 to extend into the prefabricated composite slabs 200, forming an anchorage connection with the reinforcement within the prefabricated composite slabs 200. Furthermore, the third reinforcing bar 3 pre-reserved within the prefabricated composite slabs 200 extends into the prefabricated double-sided composite shear walls 100, forming an anchorage connection with the reinforcement within the prefabricated composite slabs 200. The reinforcement within the composite shear wall 100 forms a double anchorage structure, effectively strengthening the connection strength at the lap joint between the precast double-sided composite shear wall 100 and the precast composite intermediate slab 200. This enhances the shear force transfer capacity of the precast double-sided composite shear wall 100 under conditions of large openings in the upper part. Simultaneously, relying on the tight connection between the cast-in-place joint connection channel 300 and the sides of both the precast double-sided composite shear wall 100 and the precast composite intermediate slab 200, and in conjunction with the second reinforcement bar pre-reserved within the precast double-sided composite shear wall 100, this structure effectively strengthens the connection between the precast double-sided composite shear wall 100 and the sides of the precast composite intermediate slab 200. 2. The fourth reinforcing bar 4, which extends into the cast-in-place node connection channel 300, forms an anchorage connection with the reinforcement within the cast-in-place node connection channel 300. 4. The fifth reinforcing bar 5, which is pre-reserved within the cast-in-place node connection channel 300, extends into the precast composite slab 200 and forms an anchorage connection with the reinforcement within the precast composite slab 200. 5. The fifth reinforcing bar 5, which is pre-reserved within the cast-in-place node connection channel 300, extends through the first reinforcing bar 1 connector 500 into the precast double-sided composite shear wall 100 and forms an anchorage connection with the reinforcement within the precast double-sided composite shear wall 100. The reinforcement forms a multi-anchoring system, eliminating the abrupt stiffness change in the overlap area between the precast double-sided composite shear wall 100 and the precast composite intermediate slab 200. This ensures the continuity of force among the precast double-sided composite shear wall 100, the precast composite intermediate slab 200, and the cast-in-place node connection channel 300, avoiding stress concentration at the connection between the node and the precast double-sided composite shear wall 100. This, in turn, improves the overall force coordination of the subway station's main structure and ensures the long-term stable service performance of the structure.

[0024] The prefabricated subway station features a large opening in the upper part of its side wall, serving as a passageway for passengers to enter and exit the station. Based on spatial functional requirements and structural stress characteristics, the prefabricated subway station is divided into two functional structural areas: a column-supported area and a column-free area. It should be noted that the column-supported area is located on the left and right edges of the large opening, its function being to compensate for the cross-sectional weakening defect in the side wall caused by the large opening; the column-free area corresponds to the horizontal space inside the passageway of the large opening, its function being to ensure smooth passenger passage. In this embodiment, see... Figure 1 As shown, the node area, which is composed of a precast double-sided composite shear wall 100, a precast composite middle slab 200, and a cast-in-place node connection channel 300, corresponds to the column-free area of ​​the prefabricated subway station.

[0025] The precast double-sided composite shear wall 100, serving as the load-bearing component of the station's side walls, is prefabricated in the factory with internal reinforcing bars for reliable connections with other components. It forms the vertical foundation of the entire station structure, bearing and transmitting vertical loads and horizontal lateral pressure. The precast composite intermediate slab 200, also prefabricated in the factory, serves as the station's horizontal load-bearing and partitioning component. One end of the slab overlaps horizontally on top of the precast double-sided composite shear wall 100, forming the horizontal support system of the station's main structure. It also forms a stable connection with the precast double-sided composite shear wall 100, effectively transmitting horizontal and vertical loads and ensuring horizontal structural stiffness. The cast-in-place joint connection channel 300 is not a precast component and is cast on-site after the precast double-sided composite shear wall 100 and the precast composite intermediate slab 200 are assembled and connected. The connecting channel is located on the outside of the overlapping node of the two components, and closely fits the side of the precast double-sided composite shear wall 100 and the side of the precast composite intermediate slab 200. It can fill the gap at the connection of the precast components, strengthen the integrity of the node area, and realize the rigid connection between the precast components and the cast-in-place node.

[0026] Specifically, in practical applications, the precast composite intermediate slab 200 is first horizontally overlapped onto the top of the precast double-sided composite shear wall 100, completing the initial assembly of the precast components. The overlap point forms an overlap node. Subsequently, on-site casting is carried out outside the overlap node to form a cast-in-place node connection channel 300. This ensures that the cast-in-place node connection channel 300 is tightly fitted with the sides of the precast double-sided composite shear wall 100 and the precast composite intermediate slab 200, ultimately forming a three-in-one structural system of shear wall, intermediate slab, and connection channel. This construction method fully retains the advantages of high efficiency and quality control in precast component construction, while effectively compensating for the performance shortcomings at the joints of precast components through the cast-in-place connection channel, thus meeting the dual requirements of structural stress continuity and construction convenience.

[0027] Among them, the precast double-sided composite shear wall 100 and the precast composite middle plate 200 are connected by a double anchoring connection through the first steel bar 1 and the third steel bar 3.

[0028] Specifically, the first reinforcing bar 1 is pre-reserved within the precast double-sided composite shear wall 100 and extends into the precast composite intermediate slab 200, anchoring to the reinforcement of the precast composite intermediate slab 200; the third reinforcing bar 3 is pre-reserved within the precast composite intermediate slab 200 and extends into the precast double-sided composite shear wall 100, anchoring to the reinforcement of the precast double-sided composite shear wall 100. In this embodiment, reinforcement refers to the steel reinforcement system that is pre-arranged inside the component according to the structural design requirements during the prefabrication stage in the factory. It includes various functional steel bars such as main bars, stirrups, and distribution bars, and is the core load-bearing skeleton of the component that bears the load and ensures the structural strength and stability.

[0029] Among them, the precast double-sided composite shear wall 100 and the cast-in-place node connection channel 300 are connected by the second steel bar 2 and the fifth steel bar 5 to form a two-way anchorage connection, thus constructing a stable force transmission path.

[0030] Specifically, the second reinforcing bar 2 is pre-reserved inside the precast double-sided composite shear wall 100, extends into the cast-in-place node connection channel 300, and is anchored to the reinforcement of the cast-in-place node connection channel 300; the fifth reinforcing bar 5 is pre-reserved inside the cast-in-place node connection channel 300, extends into the precast double-sided composite shear wall 100 through the first reinforcing bar 1 connector 500, and is anchored to the reinforcement of the precast double-sided composite shear wall 100. This bidirectional anchoring structure enhances the reliability of the connection between the two, ensuring efficient load transfer between the shear wall and the connection channel. Here, by setting the first reinforcing bar 1 connector 500, the accuracy of the reinforcing bar connection and its pull-out and shear resistance can be effectively improved, further enhancing the reliability of the connection between the cast-in-place node connection channel 300 and the precast double-sided composite shear wall 100, eliminating weak points in the node area, and ensuring the structural stability.

[0031] Among them, the cast-in-place node connection channel 300 and the precast composite middle slab 200 are anchored together by the fourth steel bar 4 to achieve the stress coordination between the two.

[0032] Specifically, the fourth steel bar 4 is pre-reserved inside the cast-in-place node connection channel 300, extends into the precast composite middle slab 200, and is anchored with the reinforcement of the precast composite middle slab 200, thereby strengthening the connection between the connection channel and the middle slab and ensuring the stable transfer of load between the two.

[0033] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 1 As shown, the precast double-sided composite shear wall 100 includes two layers of precast concrete wall panels arranged opposite each other, forming an interlayer longitudinal cavity between the two layers of precast concrete wall panels. One end of the first reinforcing bar 1 is inserted into the interlayer longitudinal cavity and fixedly connected to the reinforcement of the precast double-sided composite shear wall 100, and the other end is bent toward the precast composite middle plate 200 to extend into the interior of the precast composite middle plate 200. One end of the second reinforcing bar 2 is inserted into the interlayer longitudinal cavity and fixedly connected to the reinforcement of the precast double-sided composite shear wall 100, and the other end is bent toward the cast-in-place node connection channel 300 to extend into the interior of the cast-in-place node connection channel 300.

[0034] In this embodiment, the two layers of precast concrete wall panels arranged opposite each other in the precast double-sided composite shear wall 100 form an interlayer longitudinal cavity, providing a stable installation and fixing foundation for the first reinforcing bar 1 and the second reinforcing bar 2. One end of the first reinforcing bar 1 is inserted into the interlayer longitudinal cavity and fixedly connected to the reinforcement of the precast double-sided composite shear wall 100, while the other end is bent towards the precast composite middle plate 200 and extends into its interior. This can further ensure the firmness of the connection between the first reinforcing bar 1 and the reinforcement of the precast double-sided composite shear wall 100 and the accuracy of the anchorage extending into the precast composite middle plate 200, thereby strengthening the reliability of the double anchorage connection between the two. One end of the second reinforcing bar 2 is inserted into the longitudinal cavity between the layers and fixedly connected to the reinforcement of the precast double-sided composite shear wall 100. The other end is bent and extended into the cast-in-place node connection channel 300. This can improve the connection strength between the second reinforcing bar 2 and the reinforcement of the precast double-sided composite shear wall 100, and ensure the effectiveness of its extension and anchoring into the cast-in-place node connection channel 300. This helps the precast double-sided composite shear wall 100 to form a more stable force transmission path with the precast composite middle plate 200 and the cast-in-place node connection channel 300, respectively, enhance the collaborative working ability of the three, and ensure the structural strength and overall stability of the node area.

[0035] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 1 and Figure 2 As shown, the precast composite slab 200 is erected at one end of the precast double-sided composite shear wall 100, and has a longitudinal cavity inside the slab. The third reinforcing bar 3 extends from the longitudinal cavity in a direction perpendicular to the precast double-sided composite shear wall 100 and extends into the interior of the precast double-sided composite shear wall 100 to form an anchorage connection with the reinforcement inside the precast double-sided composite shear wall 100. The end of the third reinforcing bar 3 located inside the precast double-sided composite shear wall 100 is bent in a direction parallel to the precast composite slab 200.

[0036] In this embodiment, by setting an internal longitudinal cavity inside one end of the precast composite slab 200 erected on the top of the precast double-sided composite shear wall 100, a stable installation and extension carrier is provided for the third reinforcing bar 3. The third reinforcing bar 3 extends from the internal longitudinal cavity in a direction perpendicular to the precast double-sided composite shear wall 100 and extends into the interior of the precast double-sided composite shear wall 100. Combined with the structural structure in which one end of the third reinforcing bar 3 located inside the precast double-sided composite shear wall 100 is bent in a direction parallel to the precast composite slab 200, the tightness and firmness of the anchorage connection between the third reinforcing bar 3 and the reinforcement in the precast double-sided composite shear wall 100 are greatly improved. This effectively enhances the pull-out and shear resistance of the third reinforcing bar 3, further strengthens the connection reliability between the precast composite slab 200 and the precast double-sided composite shear wall 100, ensures the smoothness of load transfer between the two, and helps to improve the structural integrity and stability of the entire node area.

[0037] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 1 and Figure 2 As shown, the top of the precast double-sided composite shear wall 100 is provided with a corbel 101 protruding in the horizontal direction. The corbel 101 and the precast double-sided composite shear wall 100 are an integrated precast structure. The precast composite middle plate 200 is erected on the top surface of the corbel 101, and the third steel bar 3 extends out from the longitudinal cavity inside the plate, extends in a direction perpendicular to the precast double-sided composite shear wall 100 and extends into the interior of the corbel 101.

[0038] In this embodiment, the corbel 101 at the top of the precast double-sided composite shear wall 100 adopts an integrated precast structure with the shear wall, which can significantly improve the structural strength of the corbel 101 itself and the stability of the connection with the shear wall, providing a reliable horizontal lap support surface for the precast composite middle slab 200, ensuring the load-bearing stability of the precast composite middle slab 200 after lap. At the same time, the precast composite middle slab 200 is erected on the top surface of the corbel 101, and the third reinforcing bar 3 extends from the longitudinal cavity inside the slab and is perpendicular to the precast double-sided composite shear wall 100. The direction of the double-sided composite shear wall 100 extends into the interior of the corbel 101, which can further strengthen the connection between the precast composite middle plate 200, the corbel 101, and the precast double-sided composite shear wall 100, improve the firmness and pull-out and shear resistance of the third steel bar 3 anchorage connection, ensure the smoothness of load transfer between the precast composite middle plate 200 and the precast double-sided composite shear wall 100, enhance the coordinated stress performance of the three, and thus improve the structural integrity and load-bearing reliability of the entire node area.

[0039] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 1 and Figure 2 As shown, the fourth reinforcing bar 4 extends horizontally toward the precast composite slab 200, and the end of the fourth reinforcing bar 4 extends into the interior of the precast composite slab 200 and bends toward the bottom surface of the precast composite slab 200.

[0040] In this embodiment, the fourth reinforcing bar 4 extends horizontally toward the precast composite slab 200, and its end extending into the interior of the precast composite slab 200 bends toward the bottom surface of the precast composite slab 200. This effectively increases the anchorage contact area and anchorage length between the fourth reinforcing bar 4 and the reinforcement in the precast composite slab 200, significantly improving the firmness of the anchorage connection between the fourth reinforcing bar 4 and the reinforcement in the precast composite slab 200, enhancing the pull-out resistance and shear resistance of the fourth reinforcing bar 4, further strengthening the tightness of the connection between the cast-in-place node connection channel 300 and the precast composite slab 200, ensuring the smoothness and stability of load transfer between the cast-in-place node connection channel 300 and the precast composite slab 200, and helping the cast-in-place node connection channel 300, the precast composite slab 200 and the precast double-sided composite shear wall 100 to form a more reliable collaborative force-bearing system, thereby improving the structural integrity and load-bearing reliability of the entire node area.

[0041] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 1 and Figure 2 As shown, one end of the fifth reinforcing bar 5 is fixedly connected to the reinforcement in the cast-in-place node connection channel 300, and the other end extends along the direction close to the precast double-sided composite shear wall 100 and is fixedly connected to one end of the first reinforcing bar 1 connector 500; the other end of the first reinforcing bar 1 connector 500 is embedded inside the precast double-sided composite shear wall 100 and is connected to the pre-set connecting reinforcing bar in the precast double-sided composite shear wall 100.

[0042] In this embodiment, one end of the fifth reinforcing bar 5 is fixedly connected to the reinforcement in the cast-in-place node connection channel 300, and the other end extends along the direction close to the precast double-sided composite shear wall 100 and is fixedly connected to one end of the first reinforcing bar 1 connector 500. At the same time, the other end of the first reinforcing bar 1 connector 500 is embedded inside the precast double-sided composite shear wall 100 and is connected to the pre-set connecting reinforcing bars in the precast double-sided composite shear wall 100. This achieves a precise and stable connection between the cast-in-place node connection channel 300 and the precast double-sided composite shear wall 100 through reinforcing bars, reinforcing bar connectors and connecting reinforcing bars, effectively improving the accuracy and reliability of the connection between the two, strengthening the force transmission efficiency between the cast-in-place node connection channel 300 and the precast double-sided composite shear wall 100, further eliminating the weak points in the node area, ensuring the coordinated force-bearing performance of the cast-in-place node connection channel 300 and the precast double-sided composite shear wall 100, and helping to improve the structural stability and load-bearing capacity of the entire prefabricated subway station node area.

[0043] In the above embodiments, see Figure 1 and Figure 2 As shown, the end of the connecting steel bar away from the first steel bar 1 connector 500 is bent in a direction away from the precast composite slab 200.

[0044] It should be noted that the end of the connecting steel bar away from the first steel bar 1 connector 500 is bent in a direction away from the precast composite slab 200. This can effectively increase the anchorage contact range and firmness between the connecting steel bar and the reinforcement inside the precast double-sided composite shear wall 100, improve the pull-out resistance and shear resistance of the connecting steel bar itself, further strengthen the connection reliability between the first steel bar 1 connector 500, the connecting steel bar and the reinforcement inside the precast double-sided composite shear wall 100, ensure the smoothness and stability of the cast-in-place node connecting channel 300 when transferring loads to the precast double-sided composite shear wall 100 through the fifth steel bar 5, the first steel bar 1 connector 500 and the connecting steel bar, reduce the weak points in the node area, help enhance the cooperative stress performance of the cast-in-place node connecting channel 300 and the precast double-sided composite shear wall 100, and thus improve the structural integrity and load-bearing reliability of the node area of ​​the prefabricated subway station.

[0045] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 2 As shown, it also includes cast-in-place composite node frame columns 400, the bottom of which is connected to the top of the precast double-sided composite shear wall 100.

[0046] Here, the node area, which is composed of precast double-sided composite shear wall 100, precast composite middle plate 200, cast-in-place node connection channel 300 and cast-in-place composite node frame column 400, corresponds to the column area of ​​the prefabricated subway station.

[0047] In the above embodiments, see Figure 2 As shown, the bottom longitudinal reinforcement of the cast-in-place composite node frame column 400 is connected to the pre-reserved reinforcement at the top of the precast double-sided composite shear wall 100 through the second reinforcement 2 connector 600.

[0048] It should be noted that the second rebar connector 600 enables a reliable connection between the bottom longitudinal reinforcement of the cast-in-place composite node frame column 400 and the pre-installed reinforcement at the top of the precast double-sided composite shear wall 100. This allows for the precise transfer of the longitudinal load of the cast-in-place composite node frame column 400 to the precast double-sided composite shear wall 100, strengthening the connection and load continuity between the cast-in-place composite node frame column 400 and the precast double-sided composite shear wall 100. This creates a collaborative load-bearing system, further improving the load-bearing performance of the node structure in the columned area of ​​the prefabricated subway station. It also helps the cast-in-place composite node frame column 400 better reinforce the side walls, enhancing the overall stability and load-bearing capacity of the columned area and ensuring the load balance of the entire prefabricated subway station structural system.

[0049] In the above embodiments, see Figure 2As shown, the precast double-sided composite shear wall 100 also has a sixth steel bar 6 reserved inside. The sixth steel bar 6 extends into the cast-in-place composite node frame column 400 and forms an anchorage connection with the reinforcement in the cast-in-place composite node frame column.

[0050] It should be noted that the sixth reinforcing bar 6 pre-reserved in the precast double-sided composite shear wall 100 extends into the cast-in-place composite node frame column 400 and forms an anchorage connection with the reinforcement inside. This can further strengthen the connection and stress continuity between the precast double-sided composite shear wall 100 and the cast-in-place composite node frame column 400, making the two form a more reliable collaborative stress system. This helps the cast-in-place composite node frame column 400 to more fully play its role in reinforcing the side walls of the column area of ​​the prefabricated subway station, effectively improving the load-bearing capacity and stability of the overall structure of the column area, further improving the load-bearing performance of the node structure in the column area of ​​the prefabricated subway station, and ensuring the stress balance of the entire prefabricated subway station structural system.

[0051] Furthermore, in the column-free area corresponding to the horizontal space inside the large-opening passageway of the station, during construction, the precast double-sided composite shear wall 100 is first hoisted into place and fixed. The precast corbel 101 integrated on its top provides a horizontal support surface. The precast composite middle plate 200 is then horizontally overlapped onto the top surface of the corbel 101, allowing the third steel bar 3 pre-reserved in the precast composite middle plate 200 to extend from the longitudinal cavity inside the plate, vertically extending into the corbel 101 and the interior of the precast double-sided composite shear wall 100 and then bent and anchored. Simultaneously, the first reinforcing bar 1 within the precast double-sided composite shear wall 100 is bent and extended into the precast composite middle slab 200 for anchorage, achieving a double anchorage connection between the two through bidirectional interlocking, completing the initial assembly of the precast components and forming a lap joint; subsequently, formwork is erected outside the lap joint, and the reinforcement of the cast-in-place joint connection channel 300 is tied to ensure that the fourth reinforcing bar 4 within the cast-in-place joint connection channel 300 extends horizontally into the precast composite middle slab 200 for bending and anchorage, and the fifth reinforcing bar 5 passes through the first... A rebar connector 500 is fixed to the pre-installed rebar in the precast double-sided composite shear wall 100, and the second rebar 2 in the precast double-sided composite shear wall 100 extends to the cast-in-place joint connection channel 300 for anchoring. After verifying the accuracy of the rebar position, a one-time integral concrete pouring operation is carried out. The poured concrete not only fills the cast-in-place joint connection channel 300, but also simultaneously fills the inter-story longitudinal cavity of the precast double-sided composite shear wall 100 and the precast composite intermediate slab 200. The longitudinal cavity inside the slab allows the concrete to fully integrate with the reserved steel bars and reinforcement in each component, forming a continuous and integral reinforced concrete system. This not only strengthens the strength and rigidity of the joint through complete concrete encapsulation, but also densely fills the gaps and cavities between the precast components, eliminating water seepage channels and ensuring the waterproof performance of the joint. Ultimately, the cast-in-place joint connection channel 300 is tightly fitted with the side of the precast double-sided composite shear wall 100 and the side of the precast composite middle slab 200, forming a stable three-in-one structure.The columned areas are located on the left and right edges of the large opening. Construction must be carried out simultaneously with the assembly of precast components and the erection of formwork for connecting passages in the column-free areas. At the corresponding position on the top of the precast double-sided composite shear wall 100, the bottom longitudinal reinforcement of the cast-in-place composite node frame column 400 is first connected and fixed to the reserved reinforcement at the top of the precast double-sided composite shear wall 100 using the second rebar 2 connector 600. The reinforcement of the frame column is tied and the sixth rebar 6 reserved inside the precast double-sided composite shear wall 100 is ensured to extend into the frame column for anchorage. The formwork for the frame column is then erected and connected to the formwork of the surrounding connecting passages. The sealing process ensures a seamless connection between the column-supported and column-free areas. After verifying the dimensions of the reinforcing steel and formwork, the concrete construction of the connection passage and cavity filling with the column-free area is completed in a single, integral pouring method. This ensures a firm connection between the bottom of the frame column and the top of the 100mm precast double-sided composite shear wall. Once the overall concrete reaches its design strength, the structural connection between the two areas is completed. This not only ensures the reinforcement of the side walls by the column-supported area but also achieves structural synergy through a continuous, integral reinforced concrete system, further enhancing the mechanical properties and waterproofing reliability of the entire joint area.

[0052] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0053] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely preferred embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A prefabricated subway station, characterized in that, This includes precast double-sided composite shear walls, precast composite intermediate slabs, and cast-in-place joint connection channels; One end of the prefabricated composite middle plate is horizontally laid on top of the prefabricated double-sided composite shear wall, and the prefabricated composite middle plate and the prefabricated double-sided composite shear wall form an overlap node at the overlap position. The cast-in-place joint connection channel is located on the outside of the overlapping joint and is connected to both the side of the precast double-sided composite shear wall and the side of the precast composite middle plate, for connecting the precast double-sided composite shear wall and the precast composite middle plate. The precast double-sided composite shear wall has a first reinforcing bar and a second reinforcing bar. The first reinforcing bar extends into the interior of the precast composite middle slab and forms an anchorage connection with the reinforcement in the precast composite middle slab. The second reinforcing bar extends into the interior of the cast-in-place node connection channel and forms an anchorage connection with the reinforcement in the cast-in-place node connection channel. The precast composite slab has a third steel bar pre-reserved inside, which extends into the interior of the precast double-sided composite shear wall and forms an anchorage connection with the reinforcement inside the precast double-sided composite shear wall. The cast-in-place node connection channel is pre-reserved with a fourth and a fifth reinforcing bar. The fourth reinforcing bar extends into the interior of the precast composite slab and forms an anchorage connection with the reinforcement in the precast composite slab. The fifth reinforcing bar extends into the interior of the precast double-sided composite shear wall through the first reinforcing bar connector and forms an anchorage connection with the reinforcement in the precast double-sided composite shear wall.

2. The prefabricated subway station according to claim 1, characterized in that, The precast double-sided composite shear wall includes two layers of precast concrete wall panels arranged opposite to each other, forming an interlayer longitudinal cavity between the two layers of precast concrete wall panels. One end of the first reinforcing bar is inserted into the interlayer longitudinal cavity and fixedly connected to the reinforcement of the precast double-sided composite shear wall, and the other end is bent toward the precast composite middle plate to extend into the interior of the precast composite middle plate. One end of the second reinforcing bar is inserted into the longitudinal cavity between the layers and fixedly connected to the reinforcement of the precast double-sided composite shear wall, while the other end is bent toward the cast-in-place node connection channel to extend into the interior of the cast-in-place node connection channel.

3. The prefabricated subway station according to claim 1, characterized in that, The precast composite intermediate slab, which is erected at the top of the precast double-sided composite shear wall, has a longitudinal cavity inside. The third reinforcing bar extends from the longitudinal cavity in a direction perpendicular to the precast double-sided composite shear wall and extends into the interior of the precast double-sided composite shear wall to form an anchorage connection with the reinforcement inside the precast double-sided composite shear wall. The end of the third reinforcing bar located inside the precast double-sided composite shear wall is bent in a direction parallel to the precast composite intermediate slab.

4. The prefabricated subway station according to claim 3, characterized in that, The top of the precast double-sided composite shear wall is provided with a corbel protruding in the horizontal direction. The corbel and the precast double-sided composite shear wall are an integrated precast structure. The precast composite middle plate is erected on the top surface of the corbel, and the third steel bar extends from the longitudinal cavity inside the plate, extends in a direction perpendicular to the precast double-sided composite shear wall, and extends into the interior of the corbel.

5. The prefabricated subway station according to claim 1, characterized in that, The fourth reinforcing bar extends horizontally toward the precast composite slab, and the end of the fourth reinforcing bar extending into the interior of the precast composite slab bends toward the bottom surface of the precast composite slab.

6. The prefabricated subway station according to claim 1, characterized in that, One end of the fifth reinforcing bar is fixedly connected to the reinforcement in the cast-in-place node connection channel, and the other end extends along the direction close to the precast double-sided composite shear wall and is fixedly connected to one end of the first reinforcing bar connector; the other end of the first reinforcing bar connector is embedded inside the precast double-sided composite shear wall and is connected to the pre-set connecting reinforcing bar inside the precast double-sided composite shear wall.

7. The prefabricated subway station according to claim 6, characterized in that, The end of the connecting steel bar away from the first steel bar connector is bent away from the precast composite slab.

8. The prefabricated subway station according to claim 1, characterized in that, It also includes cast-in-place composite joint frame columns, the bottom of which is connected to the top of the precast double-sided composite shear wall.

9. The prefabricated subway station according to claim 8, characterized in that, The bottom longitudinal reinforcement of the cast-in-place composite node frame column is connected to the pre-reserved reinforcement at the top of the precast double-sided composite shear wall via a second reinforcement connector.

10. The prefabricated subway station according to claim 8, characterized in that, The precast double-sided composite shear wall also has a sixth steel bar reserved inside, which extends into the interior of the cast-in-place composite node frame column and forms an anchorage connection with the reinforcement in the cast-in-place composite node frame column.

Images