A subway station fabricated side wall connecting structure

Abstract

The utility model relates to the technical field of building, specifically disclose a subway station fabricated side wall connecting structure, including the connecting unit for connecting lower side wall and upper side wall, the connecting unit includes the column embedded in lower side wall and the slot embedded in upper side wall, the column is I -shaped steel, the slot is the I -shaped slot matched with column, when lower side wall and upper side wall splice, the column can be inserted into the slot. Subway station fabricated side wall connecting structure of the utility model, through the combination of standardization component and prefabricated side wall, through unified mould standardization production, the slot position and size are accurate, have good factory prefabricated adaptability and on -the -spot quick assembling capacity. When vertical assembly, the column is directly inserted into the slot and forms the stable upper and lower connecting relation, guarantees the efficient installation and solid connection of prefabricated side wall.

Description

Technical Field

[0001] This utility model relates to the field of building technology, specifically to a prefabricated side wall connection structure for subway stations. Background Technology

[0002] With the development of urban rail transit construction, prefabricated structures are widely used in subway station construction. As a crucial component of the station enclosure, the installation efficiency and connection quality of precast concrete sidewalls directly affect the overall construction progress and structural safety. Currently, vertical connections of precast sidewalls mostly rely on wet joint grouting or on-site welding, which presents problems such as difficulty in alignment, long construction periods, and poor connection rigidity, making it difficult to meet the requirements of rapid, high-quality assembly construction in subway projects.

[0003] In addition, traditional connection methods also have hidden dangers in terms of joint durability. Especially during the long-term service of subway stations, the wet joints and welded areas are prone to cracks, corrosion or failure due to the combined effects of train load vibration, uneven foundation settlement and groundwater erosion, which affects the overall structural collaborative working ability and durability, and increases the later maintenance costs.

[0004] Patent application number 201610842370.9 discloses a construction method for grouting connection between prefabricated side walls and bottom foundation of subway stations. Grouting of the prefabricated side walls improves the strength and stability of the sealing joints to a certain extent. However, this construction method is still relatively cumbersome, and the improvement in reliability and accuracy is very limited.

[0005] To address the aforementioned issues, it is necessary to propose a precast concrete sidewall connection structure that features high structural precision, reliable connections, and suitability for industrial assembly, thereby enabling rapid assembly and high-strength connection of precast sidewalls. Utility Model Content

[0006] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide a prefabricated side wall connection structure for subway stations that facilitates rapid assembly and high-strength connection of prefabricated side walls.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] A prefabricated sidewall connection structure for a subway station includes a connection unit for connecting a lower sidewall and an upper sidewall. The connection unit includes a column embedded in the lower sidewall and a slot embedded in the upper sidewall.

[0009] The column is an I-beam, and the slot is an I-beam slot that matches the column, allowing the column to be inserted into the slot.

[0010] As a further improvement to the above technical solution:

[0011] The connecting units are arranged in at least three sets at intervals along the length of the prefabricated sidewall.

[0012] As a further improvement to the above technical solution:

[0013] It also includes a connecting plate embedded in the lower side wall;

[0014] The connecting plate is arranged along the length of the lower side wall, and the I-shaped steel flange is welded to the connecting plate.

[0015] As a further improvement to the above technical solution:

[0016] The connecting plate is the same length as the lower side wall; and the connecting plate is made of steel plate.

[0017] As a further improvement to the above technical solution:

[0018] The I-beam and the connecting plate are also fixed to the main reinforcement bars of the lower side wall by binding them together with the outer steel cage.

[0019] As a further improvement to the above technical solution:

[0020] The I-beams are also welded to the steel reinforcement skeleton of the lower side wall.

[0021] As a further improvement to the above technical solution:

[0022] It also includes a suspension pad layer disposed between the upper sidewall and the lower sidewall.

[0023] As a further improvement to the above technical solution:

[0024] It also includes a water-stop groove pre-set around the opening near the lower side wall of the slot, and a rubber water-stop strip is embedded in the water-stop groove, which can make a sealed contact with the lower side wall.

[0025] As a further improvement to the above technical solution:

[0026] The slot is also filled with grout.

[0027] Compared with the prior art, the advantages of this utility model are:

[0028] (1) A prefabricated sidewall connection structure for a subway station, comprising a connection unit for connecting a lower sidewall and an upper sidewall, wherein the connection unit includes a column pre-embedded in the lower sidewall and a slot pre-embedded in the upper sidewall; the column is an I-beam, and the slot is an I-beam slot matching the column, wherein the column can be inserted into the slot when the lower sidewall and the upper sidewall are spliced. The prefabricated sidewall connection structure for a subway station of this utility model combines standardized components with prefabricated sidewalls, and is produced in a standardized manner using unified molds. The slot position and size are accurate, and it has good factory prefabrication adaptability and on-site rapid assembly capability. During vertical assembly, the column is directly inserted into the slot to form a stable upper and lower connection relationship, ensuring efficient installation and stable connection of the prefabricated sidewall.

[0029] (2) The column of this utility model uses I-beam steel as the core connecting component, which has strong load-bearing capacity, is easy to install, and improves the structural connection rigidity and safety.

[0030] (3) The upper and lower flanges of the steel profile of this utility model are connected by welding to the thick steel plate that penetrates the wall, and are reinforced as a whole by the steel cage to form a stable force system, ensuring the rigidity and stability of the component during lifting, transportation and installation.

[0031] (4) The connection structure has high sealing performance. By setting water-stop strips and high-strength grouting materials, the connection can achieve seepage prevention and durable sealing, which is suitable for the use environment of underground projects such as subways. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the prefabricated sidewall connection structure for subway stations of this utility model in use.

[0033] Figure 2 This is a cross-sectional schematic diagram of the upper side wall of the prefabricated side wall.

[0034] Legend: 1. Column; 2. Slot; 3. Connecting plate; 4. Upper side wall; 5. Lower side wall; 6. Bedding pad; 7. Side wall longitudinal reinforcement; 8. Anchor reinforcement; 9. Truss reinforcement. Detailed Implementation

[0035] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] like Figure 1 As shown, this embodiment provides a prefabricated side wall connection structure for a subway station, including a connection unit for connecting the lower side wall 5 and the upper side wall 4. The connection unit includes a column 1 embedded in the lower side wall 5 and a slot 2 embedded in the upper side wall 4.

[0037] The column 1 is an I-beam, and the slot 2 is an I-beam slot that matches the column. When the lower side wall 5 and the upper side wall 4 are spliced ​​together, the column 1 can be inserted into the slot 2.

[0038] The column 1 is an I-beam, specifically a single hot-rolled HM440×300×11×18 steel section in this embodiment. The I-beam is also welded to the reinforcing steel cage of the lower side wall 5. This steel section has a large cross-sectional size and high load-bearing capacity. The welding connection to the reinforcing steel cage ensures the overall strength and connection rigidity of the structure. This steel section is embedded in the lower side wall as a pre-installed component, and is arranged and fixed together with the reinforcing steel cage before the wall is poured to ensure its positional accuracy and anchorage performance within the structure.

[0039] The slot is located within the upper side wall, with a cross-sectional dimension matching that of the steel column, and both are I-shaped. The slot has an internal groove channel to accommodate the I-beam column and achieve high-precision insertion. Limiting steel plates are provided on both sides of the slot, and a supporting step is provided at the bottom to ensure the insertion depth of the column and limit its vertical settlement.

[0040] The slot is formed in one piece using a high-precision mold. Its inner wall is pre-embedded with a limiting steel plate and has a pressure-bearing seat surface, which can accurately limit the insertion depth of the I-beam and ensure that the axes of the upper and lower walls are aligned.

[0041] The connection structure in this embodiment enables plug-in connection between the upper and lower side walls, ensuring high connection strength and rapid assembly. It is suitable for urban rail transit engineering scenarios with limited underground space and high construction precision requirements.

[0042] The connecting units are arranged in at least three sets at intervals along the length of the prefabricated sidewall. Taking this embodiment as an example, in a typical structure, each prefabricated sidewall has three sets of connecting units arranged at intervals.

[0043] It also includes a connecting plate 3 embedded in the lower side wall 5; the connecting plate 3 is arranged along the length of the lower side wall 5, and the flange of the I-shaped steel is welded to the connecting plate 3. The whole formed by the I-shaped steel and the connecting plate 3 is also tied and fixed to the main reinforcement of the lower side wall 5 by an outer steel cage.

[0044] Each steel column has its upper and lower flanges fixed to a thick steel connecting plate of the same width as the wall by welding, forming an overall load-bearing frame; at the same time, it is wrapped with a steel cage and tied to the main reinforcement of the wall to ensure the structural integrity and positioning accuracy of the slot connection components during the prefabrication and installation of the components.

[0045] The connecting plate 3 is the same length as the lower side wall 5; and the connecting plate 3 is a steel plate.

[0046] It also includes a suspension pad layer 6 disposed between the upper sidewall 4 and the lower sidewall 5.

[0047] It also includes a water-stop groove pre-installed around the opening of the slot 2 near the lower side wall 5, with a rubber water-stop strip embedded in the groove, which can make a sealing contact with the lower side wall 5. Through the above settings, the connection structure of this embodiment can effectively improve the sealing performance and durability of the connection node.

[0048] The slot 2 is also filled with grout. After the upper and lower side walls are assembled, high-strength grout and high-performance grout are injected into the slot to fill the gaps and form a dense and rigid connection interface.

[0049] After the insertion is completed, the rubber waterstop strip, together with the injection of high-strength C60 grout and C85 high-performance grout, forms a dense, continuous joint seal with watertightness and shear resistance in the slot space.

[0050] like Figure 2 As shown, the connection structure in this embodiment includes a complete steel reinforcement system installed on the upper and lower side walls. The I-beam is externally equipped with a steel cage, which includes continuous reinforcing bars penetrating the wall, circumferentially arranged longitudinal side wall bars 9, anchor bars 10 connected to the foundation pit retaining structure, and truss bars 11 arranged in the middle of the wall. The anchor bars 10 are arranged in the web direction of the I-beam, perpendicular to the ground, located on the soil-facing side, and positioned between two sets of web-direction bolts to enhance the pull-out bearing capacity of the joint. The truss bars 11 are arranged transversely in the wall, perpendicular to the bolt direction and parallel to the ground, serving as an overall tie and improving the shear resistance of the joint.

[0051] During construction, the upper sidewall is first hoisted into place and stabilized with temporary supports. The upper sidewall is then lifted to the top of the slot using equipment such as a gantry crane. After the slot and column are aligned, it is slowly lowered. During the insertion process, the insertion depth and angle are controlled by the high-strength padding material at the bottom and the limiting steel plate of the slot, ensuring a tight joint and stable stress distribution.

[0052] After the splicing is completed, once the verticality, flatness, and joint gaps of the wall are confirmed to meet the design requirements, grout is immediately injected into the slot. The grout inlet is prefabricated together with the upper side wall and located on the side of the upper side wall, connecting the slot and the outside of the upper side wall. Before the grout initially sets, temporary welded steel plates or adjustable bolts are used to reinforce the top lifting lugs and the enclosure structure to prevent component displacement. To improve the connection strength, connecting steel cages are pre-embedded at the interface of adjacent side wall overlapping sections, and the joint post-cast strip is poured integrally after the wall sections are spliced.

[0053] After the overall structure is assembled, the connections between components are firm, and the grouting in the slots is dense and continuous, effectively withstanding the lateral earth pressure and vertical structural loads during the operation of the subway station. At the same time, the structure has excellent repeatability, significantly improving assembly efficiency and project quality, making it suitable for the rapid construction needs of complex underground engineering projects.

[0054] The above description is merely a preferred embodiment of this utility model, and the protection scope of this utility model is not limited to the above embodiments. For those skilled in the art, improvements and modifications obtained without departing from the technical concept of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A prefabricated sidewall connection structure for subway stations, characterized in that: It includes a connecting unit for connecting the lower side wall (5) and the upper side wall (4), the connecting unit including a column (1) embedded in the lower side wall (5) and a slot (2) embedded in the upper side wall (4). The column (1) is an I-beam, and the slot (2) is an I-beam slot that matches the column. When the lower side wall (5) and the upper side wall (4) are spliced ​​together, the column (1) can be inserted into the slot (2).

2. The prefabricated sidewall connection structure for subway stations according to claim 1, characterized in that: The connecting units are arranged in at least three sets at intervals along the length of the prefabricated sidewall.

3. The prefabricated sidewall connection structure for subway stations according to claim 1, characterized in that: It also includes a connecting plate (3) pre-embedded in the lower side wall (5); The connecting plate (3) is arranged along the length of the lower side wall (5), and the I-beam is welded to the connecting plate (3) through the flange surface.

4. The prefabricated sidewall connection structure for subway stations according to claim 3, characterized in that: The connecting plate (3) is the same length as the lower side wall (5); and the connecting plate (3) is a steel plate.

5. The prefabricated sidewall connection structure for subway stations according to claim 4, characterized in that: The I-beam and the connecting plate (3) together are also fixed to the main reinforcement of the lower side wall (5) by binding the outer steel cage with the main reinforcement.

6. The prefabricated sidewall connection structure for subway stations according to claim 1, characterized in that: The I-beam is also welded to the steel reinforcement skeleton of the lower side wall (5).

7. The prefabricated sidewall connection structure for subway stations according to claim 1, characterized in that: It also includes a suspension pad (6) disposed between the upper sidewall (4) and the lower sidewall (5).

8. The prefabricated sidewall connection structure for subway stations according to claim 1, characterized in that: It also includes a water-stop groove pre-set around the opening of the slot (2) near the lower side wall (5), and a rubber water-stop strip is embedded in the water-stop groove, which can make a sealed contact with the lower side wall (5).

9. The prefabricated sidewall connection structure for subway stations according to claim 1, characterized in that: The slot (2) is also filled with grout.

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