Cover plate vertical support structure for a subway station

Abstract

The application discloses a cover vertical supporting structure for a subway station, which comprises a cover, a steel pipe column, a stand column pile, a base and a station bottom plate, the stand column pile is embedded in the base and extends out of the base at one end, the stand column pile is provided with an inserting groove above the base, the lower end of the steel pipe column extends into the inserting groove and is connected with the inserting groove, the cover is fixedly arranged at the upper end of the steel pipe column, the bottom of the inserting groove is provided with a load guide plate, and the load guide plate is provided with a pouring hole for injecting concrete into the stand column pile.

Description

Technical Field

[0001] This invention belongs to the field of building construction technology, and specifically relates to a vertical support structure for cover plates in subway stations. Background Technology

[0002] Urban rail transit lines are mostly laid along main urban roads. During the construction of underground stations, it is often necessary to install slabs or use the station's permanent roof slab as a slab to meet the needs of traffic diversion, pipeline relocation, and construction equipment passage. During the excavation and cover construction process under the slab, vertical supports are required to bear the load of the slab and the upper structure. Existing vertical supports generally adopt a system of steel lattice columns and bottom-buried pile columns. The top of the pile column is flush with the foundation, and the bottom of the column extends into the pile column to a certain length below the bottom of the pit for anchorage.

[0003] While existing technologies are applicable under normal working conditions, when tunnel construction for planned rail transit lines, municipal utility tunnels, or other projects is planned beneath the station floor within the cover plate area, the existing technologies will become obstacles to tunnel construction due to issues such as steel column extension and column pile reinforcement. This is because the tunnel route is often difficult to predict in advance, and the clearance between the tunnel and the station floor is limited by the conditions of the tunnel section. These obstacles will affect the later construction of shield tunnels, primarily in two aspects: 1. The steel lattice structure extends below the foundation. When the tunnel is constructed with a small clearance to pass under it, there is a risk that the shield tunneling may collide with the remaining steel columns. The risk point is located below the existing subway station, which is in operation, making it difficult to handle. 2. The entire column pile uses ordinary steel bars. Later, the tunnel shield excavation was hindered, and the internal force transmitted from the column pile to the existing subway station floor slab above was large, which affected the structure of the existing subway station and the safety of the line operation. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a vertical support structure for subway station cover plates, which can effectively solve the problem that the existing vertical support structure for subway station cover plates affects the later construction of tunnels passing under the station.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A vertical support structure for a subway station cover plate includes a cover plate, steel pipe columns, column piles, a base, and a station base plate. The station base plate is located above the base. The column piles are embedded in the base and one end extends out of the base. Each column pile has a spigot groove located above the base. The lower end of the steel pipe column extends into the spigot groove and is connected to it. The cover plate is fixedly installed at the upper end of the steel pipe column. A guide plate is provided at the bottom of the spigot groove, and the guide plate has a pouring hole for injecting concrete into the column pile.

[0006] As a preferred embodiment of the present invention, a water-stop steel plate is welded onto the steel pipe column, and the water-stop steel plate is located in the middle of the station floor slab.

[0007] As a preferred embodiment of the present invention, a support tray is welded to the bottom of the cover plate. The support tray includes an annular steel plate and vertical ribs. The annular steel plate is welded to the steel pipe column, and multiple vertical ribs are provided and spaced apart along the circumference on the annular steel plate.

[0008] As a preferred embodiment of the present invention, the cover plate is pre-embedded with cover plate anchor bars, which are welded to the inner side of the steel pipe column.

[0009] As a preferred embodiment of the present invention, the column pile includes an exposed section, a transition section, a reserved crossing section and a bottom bearing section arranged sequentially from top to bottom, the exposed section extending out of the base, and the insertion groove being disposed on the exposed section.

[0010] As a preferred embodiment of the present invention, the height of the exposed section is not less than five times the diameter of the column pile.

[0011] As a preferred embodiment of the present invention, the exposed section, the transition section, the reserved crossing section and the bottom bearing section are all provided with vertical main bars and ring stirrups.

[0012] As a preferred embodiment of the present invention, the vertical main reinforcement and the annular stirrups of the reserved crossing section are both set as glass fiber reinforcement.

[0013] As a preferred embodiment of the present invention, the steel pipe column is filled with plain concrete.

[0014] The vertical support structure for subway station cover plates provided by this invention has the following advantages compared with the prior art: The vertical support structure of the cover plate of this invention consists of a cover plate, steel pipe columns, column piles, a base, and a station floor slab. The upper end of the column piles extends beyond the base, while the steel pipe columns do not extend below the base. This not only allows for flexible adjustments to the horizontal route of tunnels constructed beneath the subway station but also avoids the risk of excavation equipment colliding with residual steel columns when the tunnel needs to pass under the existing subway station with a small clearance. This significantly enhances the flexibility of choosing a construction plan for the tunnel under the existing station. Simultaneously, it reduces the risk of the tunnel penetrating the existing piles, and the internal force transmitted to the existing subway station floor slab after pile cutting is small, minimizing the impact on the existing operating subway station. Using this invention, the construction process is simple, and the construction quality is reliable. It not only greatly reduces the route restrictions for tunnels under existing subway stations but also lowers the risk of the tunnel penetrating the existing piles, significantly enhancing the flexibility of choosing a construction plan. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0016] Figure 1 is a schematic diagram of a vertical support structure for a subway station cover plate provided by an embodiment of the present invention; Figure 2 is a schematic diagram of the pallet structure; Figure 3 is a schematic diagram of the load guide plate.

[0017] Marked in the image: 1. Cover plate; 2. Steel pipe column; 3. Column pile; 301. Exposed section; 302. Transition section; 303. Reserved crossing section; 304. Bottom bearing section; 4. Foundation; 5. Station floor slab; 6. Insertion groove; 7. Guide plate; 8. Pouring hole; 9. Waterstop steel plate; 10. Bearing tray; 1001. Annular steel plate; 1002. Cover plate anchor bar; 11. Temporary support; 12. Concrete; 1201. Connecting studs; 1202. Detailed Implementation

[0018] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0019] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," "top," and "bottom," 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 the invention and for 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 the invention. It should be understood that the terms "first," "second," etc., are used in this invention to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this invention, "first" information can also be referred to as "second" information, and similarly, "second" information can also be referred to as "first" information.

[0020] As shown in Figures 1 to 3, a preferred embodiment of the present invention provides a vertical support structure for a cover plate 1 in a subway station, comprising a cover plate 1, steel pipe columns 2, column piles 3, a base 4, and a station floor 5. The station floor 5 is located above the base 4. The column piles 3 are embedded in the base 4 with one end extending out of the base 4. The column piles 3 are provided with insertion grooves 6, which are located above the base 4. The lower end of the steel pipe column 2 extends into the insertion grooves 6 and is connected to them. The cover plate 1 is fixedly installed at the upper end of the steel pipe column 2. A guide plate 7 is provided at the bottom of the insertion grooves 6, and the guide plate 7 is provided with pouring holes 8 for injecting concrete into the column piles 3. It should also be noted that in this embodiment, the cover plate 1 can be a temporary cover plate 1 installed near the ground surface, or it can be a cover plate 1 that also serves as the permanent roof slab of the station.

[0021] The vertical support structure of the cover plate 1 of this invention consists of a cover plate 1, steel pipe columns 2, column piles 3, a base 4, and a station floor 5. The upper end of the column piles 3 extends beyond the base 4, while the steel pipe columns 2 do not extend below the base 4. This not only allows for flexible adjustments to the horizontal route of the tunnel constructed below the subway station but also avoids the risk of excavation equipment colliding with residual steel columns when the tunnel needs to pass under the existing subway station with a small clearance. This greatly enhances the flexibility of the construction plan for the tunnel under the existing station. Simultaneously, it reduces the risk of the tunnel penetrating the existing piles, and the internal force transmitted to the existing subway station floor 5 from the pile cutting is small, minimizing the impact on the existing operating subway station. Using this invention, the construction process is simple, and the construction quality is reliable. It not only greatly reduces the route restrictions for the tunnel passing under the existing subway station but also reduces the risk of the tunnel penetrating the existing piles, significantly enhancing the flexibility of the construction plan.

[0022] During construction, after drilling holes using rotary drilling rigs and other pile foundation construction equipment, the reinforcing cage of the column pile 3 is lowered and fixed at the trench opening to ensure that the top of the reinforcing cage of the column pile 3 is above the ground. The steel pipe column 2 is lifted, and after connecting the steel pipe column 2 with the reinforcing cage of the column pile 3, it is lowered as a whole. The skeleton is positioned by controlling the elevation of the guide plate 7 at the bottom of the steel pipe column 2. Then, the concrete pouring pipe is inserted into the bottom of the column pile 3 through the pouring hole 8, and the concrete is poured underwater from bottom to top. After the concrete of the column pile 3 reaches the design strength, the top cover plate 1 is constructed. Then, the excavation and cover construction is carried out under the cover plate 1. After excavation to the foundation 4 and completion of the cushion layer pouring, the concrete of the exposed section 301 of the column pile 3 within the station floor slab 5 is removed, and the bottom of the station floor slab 5 is sealed.

[0023] For example, a water-stop steel plate 9 is welded onto the steel pipe column 2, and the water-stop steel plate 9 is located in the middle of the station floor slab 5. The water-stop steel plate 9 can serve as an effective water-blocking measure, preventing water under the station floor slab 5 from seeping along the side wall of the steel pipe onto the station floor slab 5.

[0024] For example, a support tray 10 is welded to the bottom of the cover plate 1. The support tray 10 includes an annular steel plate 1001 and vertical ribs 1002. The annular steel plate 1001 is welded to the steel pipe column 2, and multiple vertical ribs 1002 are provided and spaced circumferentially on the annular steel plate 1001. Thus, the support tray 10 can provide support for the cover plate 1, further ensuring the connection between the cover plate 1 and the steel pipe column 2, thereby ensuring the stability of the vertical support structure of the cover plate 1.

[0025] For example, to facilitate the connection between the cover plate 1 and the steel pipe column 2, a cover plate anchor bar 11 is pre-embedded on the cover plate 1, and the cover plate anchor bar 11 is welded to the inner side of the steel pipe column 2. In specific implementation, the cover plate anchor bar 11 can be anchored into the cover plate 1 using a straight anchor or a bent anchor.

[0026] Specifically, the column pile 3 includes an exposed section 301, a transition section 302, a reserved through section 303, and a bottom bearing section 304 arranged sequentially from top to bottom. The exposed section 301 extends out of the base 4, and the insertion groove 6 is provided on the exposed section 301. It should also be noted that, in order to meet the relevant requirements of the stirrup reinforcement zone at the top of the column pile 3, the height of the exposed section 301 is not less than five times the diameter of the column pile 3.

[0027] For example, the exposed section 301, the transition section 302, the reserved crossing section 303, and the bottom bearing section 304 are all provided with vertical main bars and ring stirrups, wherein the vertical main bars and ring stirrups of the reserved crossing section 303 are all made of glass fiber reinforcement. Glass fiber reinforcement has high tensile strength, but it can be easily cut directly by tunnel construction equipment, which facilitates the later tunnel pile construction.

[0028] For example, plain concrete 1201 is poured into the steel pipe column 2. This can greatly improve the load-bearing capacity of the steel pipe column 2 and further ensure the strength and stability of the vertical support structure of the cover plate 1.

[0029] It should also be noted that, during the specific construction phase, temporary supports 12 can be installed on the cover plate 1. The temporary supports 12 are provided in multiple sets and are arranged at intervals along the height direction of the steel pipe column 2. The temporary supports 12 include a support plate 10 and concrete 1201, and are provided with reinforcing bars. The concrete 1201 is poured on the outer periphery of the steel pipe column 2. The support plate 10 is located on the lower side of the concrete 1201. The concrete 1201 is also provided with multiple connecting studs 1202 connected to the steel pipe column 2.

[0030] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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 of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0031] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A vertical support structure for cover plates in subway stations, characterized in that, The system includes a cover plate, steel pipe columns, column piles, a base, and a station floor slab. The station floor slab is located above the base. The column piles are embedded in the base with one end extending out of the base. Each column pile has a spigot groove located above the base. The lower end of the steel pipe column extends into the spigot groove and is connected to it. The cover plate is fixedly installed at the upper end of the steel pipe column. A guide plate is provided at the bottom of the spigot groove, and the guide plate has a pouring hole for injecting concrete into the column pile. The column pile includes an exposed section, a transition section, a reserved crossing section and a bottom bearing section arranged sequentially from top to bottom. The exposed section extends out of the base and the insertion groove is provided on the exposed section. The height of the exposed section is not less than five times the diameter of the column pile.

2. The vertical support structure for a subway station cover plate according to claim 1, characterized in that, A water-stop steel plate is welded onto the steel pipe column, and the water-stop steel plate is located in the middle of the station floor slab.

3. The vertical support structure for a subway station cover plate according to claim 1, characterized in that, The bottom of the cover plate is welded with a support tray, which includes an annular steel plate and vertical ribs. The annular steel plate is welded to the steel pipe column, and multiple vertical ribs are provided and spaced apart along the circumference on the annular steel plate.

4. The vertical support structure for a subway station cover plate according to claim 1, characterized in that, The cover plate is pre-embedded with cover plate anchor bars, which are welded to the inner side of the steel pipe column.

5. A vertical support structure for a subway station cover plate according to claim 1, characterized in that, The column pile includes an exposed section, a transition section, a reserved crossing section and a bottom bearing section arranged sequentially from top to bottom. The exposed section extends out of the base and the insertion groove is provided on the exposed section.

6. A vertical support structure for a subway station cover plate according to claim 5, characterized in that, The height of the exposed section is not less than five times the diameter of the column pile.

7. A vertical support structure for a subway station cover plate according to claim 5, characterized in that, The exposed section, the transition section, the reserved crossing section, and the bottom bearing section are all equipped with vertical main bars and ring stirrups.

8. A vertical support structure for a subway station cover plate according to claim 7, characterized in that, The vertical main reinforcement and the ring stirrups of the reserved crossing section are all made of glass fiber reinforcement.

9. A vertical support structure for a subway station cover plate according to claim 1, characterized in that, Plain concrete was poured into the steel pipe column.

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