Rectangular-section vertical overlapping type subway station and construction method thereof

Abstract

The invention discloses a rectangular-section vertical overlapping type subway station and a construction method thereof.The overlapping type subway station comprises a first pipe-jacking tunnel and a second pipe-jacking tunnel which are constructed by rectangular pipe-jacking sections and arranged in an up-down overlapping mode, and the two pipe-jacking tunnels are communicated through a starting well, a receiving well and a vertical well; passengers can enter the first pipe jacking tunnel or the second pipe jacking tunnel to take a bus and transfer between the first pipe jacking tunnel and the second pipe jacking tunnel; when the subway station is constructed, pipe-jacking pipe joints and other related parts are prefabricated and customized in a factory, meanwhile, a starting well and a receiving well are constructed, and then a second pipe-jacking tunnel, a first pipe-jacking tunnel, a vertical shaft of which the middle part is communicated up and down, an entrance and exit of the subway station and the like are constructed. The method is suitable for building the subway station under the complex environment conditions that population in a central urban area is dense, underground space is narrow, and the ground is not suitable for large-area excavation, the station technology and functions can be met, and the engineering feasibility is high.

Description

Technical Field

[0001] The invention belongs to the technical field of subway, tunnel and pipe jacking construction, and particularly relates to a vertically superimposed subway station with a rectangular section and a construction method thereof. Background Art

[0002] In the central area of ​​the city, there are often various dense buildings (structures) on the ground, and various pipelines are often densely distributed under the ground. The ground roads in the central area of ​​the ancient city are not wide and the traffic is very busy. In addition, there are red line restrictions on both sides of the road. If the traditional open-cut method and cover-cut method are still used for subway station construction, it will face multiple challenges, including the difficulty of demolition or prohibition of demolition, strict implementation conditions, high construction risks, difficulty in controlling the construction period, and high initial demolition costs. Therefore, exploring a new quality construction method with less land occupation, less demolition, less impact on the environment, controllable construction period, less risk, and better economy is of great significance to the construction of subway stations in the central area of ​​the city, especially in the central area of ​​the ancient city.

[0003] In addition, the cross-sectional size of commonly used rectangular shields or jacking pipes is relatively limited, which makes it difficult to meet the functional and architectural layout requirements of subway stations. At the same time, there are still many technical difficulties and high costs in equipment manufacturing and on-site implementation of oversized rectangular shields or jacking pipes. Therefore, studying how to realize the functions of subway stations through the combination of rectangular cross-sectional shields or jacking pipes with existing specifications will provide innovative ideas for the construction of subway stations in the complex environment of the central urban area. Summary of the invention

[0004] The purpose of the present invention is to provide a subway station construction method with strong feasibility and low risk, which can be constructed in the central area of ​​the ancient city or other areas through a rectangular cross-section shield or jacking pipe space combination, and a combined subway station built by this method, which can effectively meet the station functions and achieve the goals of less demolition, less excavation, less pipeline relocation, less disturbance to the public, and good economy.

[0005] In order to achieve the above technical effects, the technical solution adopted by the present invention is: A vertically superimposed subway station with a rectangular cross-section, comprising a No. 1 jacking tunnel with a full standard section range and a No. 2 jacking tunnel with a full standard section range constructed by jacking pipe sections with a rectangular cross-section, wherein the width and height of the jacking pipe sections must at least meet the minimum width and height requirements for constructing a subway station with a one-story one-way single lane and a platform; the No. 1 jacking tunnel is arranged in parallel above the No. 2 jacking tunnel, and the two ends of the No. 1 jacking tunnel and the No. 2 jacking tunnel are connected through a starting shaft and a receiving shaft respectively; the No. 1 jacking tunnel and the No. 2 jacking tunnel are connected through a starting shaft and a receiving shaft respectively; A driving track and a track-top air duct are provided on one side of the jacking tunnel, and a platform is provided on the other side, and the platforms in the two jacking tunnels are arranged on the same side of the two jacking tunnels. The No. 1 jacking tunnel and the No. 2 jacking tunnel are provided with vertical shafts on the outer sides of the platform sides, and the upper and lower ends of the vertical shafts are connected to the No. 1 jacking tunnel platform and the No. 2 jacking tunnel platform through connecting passages respectively. At least one of an escalator, a vertical elevator and a step ladder can be provided inside the vertical shaft for passengers to transfer in the driving direction between the No. 1 jacking tunnel and the No. 2 jacking tunnel.

[0006] Furthermore, the starting shaft and the receiving shaft are connected to the end entrances and exits respectively through entrance and exit passages, and automatic ticket vending machines, security inspection equipment and entry and exit gates are arranged in the entrance and exit passages; escalators, vertical elevators and stairs are provided in the starting shaft and the receiving shaft to enable passengers to go up and down from the end entrances and exits to the two platforms.

[0007] Furthermore, the starting well and the receiving well are both three-layer, the upper layer is mainly used to connect with the accessories (wind pavilion and end entrances and exits); the middle layer and the lower layer are connected to the No. 1 jacking tunnel and the No. 2 jacking tunnel respectively.

[0008] Furthermore, the No. 1 pipe jacking tunnel and the No. 2 pipe jacking tunnel are provided with a middle entrance and exit on the outer side of the platform side, and the middle entrance and exit are connected to the No. 1 pipe jacking tunnel platform or the vertical shaft through an entrance and exit passage.

[0009] The present invention also provides a construction method for a vertically superimposed subway station, comprising the following construction steps: S1. Prefabrication and customization of jacking pipe sections and other related parts: prefabricate or customize jacking pipe sections, temporary support bodies and other related parts in corresponding factories, where prefabricated jacking pipe sections include conventional jacking pipe sections of the same shape and size and detachable jacking pipe sections with side openings; and ensure that the width and height of the jacking pipe sections at least meet the minimum width and height requirements for constructing a subway station with a single-lane, one-way lane and platform; S2. Construction of terminal wells: excavation of foundation pits, construction of starting wells and receiving wells, and corresponding reservation of starting tunnels and receiving tunnels for jacking tunnels. In each terminal well, reservation of starting or receiving tunnels for No. 1 jacking tunnel, No. 2 jacking tunnel, and adjacent section tunnels; S3. Construction of No. 2 Pipe Jacking Tunnel: Use pipe jacking method or shield method to construct No. 2 Tunnel. During construction, break the starting shaft door, push forward from the starting shaft section by section, realize the connection and penetration of the starting shaft and the receiving shaft with No. 2 Pipe Jacking Tunnel, and then carry out the subsequent construction of the terminal shaft and No. 2 Pipe Jacking Tunnel (including the construction of prefabricated secondary structure, driving track, track top air duct, platform, etc.).

[0010] S4. Construction of No. 1 pipe jacking tunnel: Use pipe jacking method or shield method to construct No. 1 pipe jacking tunnel.

[0011] S5. Construction of the middle shaft: A shaft is constructed outside the No. 1 and No. 2 jacking tunnels near the platform. The shaft is constructed by open-cut method (ground-connected wall as enclosure), caisson or a combination of permanent and temporary methods to achieve vertical connection between the jacking tunnels and passenger transfer in the driving direction. To ensure construction error, the shaft is connected to the jacking tunnel through a connecting passage to ensure construction safety. S6. Construction of wind shelters and safety passages: Build wind shelters, safety passages, etc. on one side of the end well through open excavation method.

[0012] S7. Construction of subway entrances and exits: Build end entrances and exits and access passages outside the end shaft, connect the end entrances and exits with the wind shelter through the access passages, and arrange ticketing facilities, security facilities, and entry and exit gates in the access passages.

[0013] Furthermore, the step S7 of constructing subway entrances and exits also includes the construction of a middle entrance and exit: building a middle entrance and exit and an access passage at a suitable position outside the No. 1 jacking tunnel or the No. 2 jacking tunnel on the platform side, and connecting the middle entrance and exit with the No. 1 jacking tunnel or connecting the middle entrance and exit with the shaft through the access passage, and arranging facilities such as automatic ticket vending machines, security inspection equipment and access gates in the access passage.

[0014] Furthermore, in the step S7 of constructing the subway entrance and exit, the connection between the end entrance and exit and the wind shelter or the No. 1 jacking tunnel is constructed by jacking method, open-cut shaft, pipe curtain method or horizontal MJS method according to the actual situation.

[0015] Furthermore, in the step S7 of constructing the subway entrance and exit, the connection between the No. 1 pipe jacking tunnel and the vertical shaft, the No. 2 pipe jacking tunnel and the vertical shaft, and / or the No. 1 pipe jacking tunnel and the entrance and exit passage includes the following construction steps: S71. Reinforce the soil layer between the No. 1 and No. 2 jacking tunnels and the shaft or between the No. 1 jacking tunnel and the access passage. Grouting reinforcement method, freezing method or other methods may be selected according to actual conditions. The connection passage will only be started after the strength of the reinforcement body has been confirmed to have reached the design value through testing; S72. Temporary support structures shall be erected at the opening location to enhance the stability of the tunnel at the opening location and prevent excessive deformation of the tunnel due to local weakening; S73. Connect the reserved steel members corresponding to each ring pipe segment connected to the removable member around the opening with the reserved steel members of the adjacent pipe segments in pairs to form an integral ring frame beam around the opening; S74. Remove the removable parts of each pipe section in the reserved hole in turn, observe and test the stability of the soil outside the hole and whether there is water seepage while removing. If it is unsafe, stop the removal and take necessary safety measures. After handling, continue to remove the other pipe sections in the reserved hole until all the removable pipe sections of the entire reserved hole are removed; S75. Excavate the soil between the No. 1 and No. 2 jacking tunnels and the vertical shaft or between the No. 1 jacking tunnel and the access passage, and construct the reserved passage between the No. 1 and No. 2 jacking tunnels and the vertical shaft or between the No. 1 jacking tunnel and the access passage; complete other reserved passages between the No. 1 and No. 2 jacking tunnels and the vertical shaft or between the No. 1 jacking tunnel and the access passage; S76. Remove temporary support structures.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention constructs two No. 1 and No. 2 jacking tunnels with opposite driving directions by using jacking tunnel sections of width and height that meet the minimum requirements for building a subway station with a one-layer one-way single lane and a platform, and arranges the No. 1 and No. 2 jacking tunnels in a superimposed manner, and connects the two layers of jacking tunnels through end shafts (starting shaft and receiving shaft) and lateral shafts. Therefore, subway stations can be built in complex environments such as densely populated central urban areas, narrow underground passage space, and lack of large-scale open excavation conditions on the ground, and the station process and functions can be met. The project has strong feasibility, can shorten the construction period, reduce construction risks, reduce excavation area, optimize traffic relief, and realizes prefabricated assembly construction. It is green and environmentally friendly, more practical, and has the advantages of simple structure, reasonable design, low production cost, etc.

[0017] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail in conjunction with the accompanying drawings and embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a plan layout diagram of a subway station of the present invention; Figure 2 A three-dimensional rendering of a subway station of the present invention; Figure 3 for Figure 1 Sectional view of part A (end entrance and exit); Figure 4 for Figure 1 A cross-sectional view of the B part (end well) in one direction; Figure 5 for Figure 1 The cross-sectional view of the B part (end well) in another direction; Figure 6 for Figure 1 Sectional view of part C (middle entrance and exit); Figure 7 for Figure 1 The cross-sectional view of the D part (the connection between the shaft and the jacking tunnel); Figure 8 It is a three-dimensional effect diagram of the end well of the present invention; Fig. 9 It is a three-dimensional effect diagram of the vertical shaft of the present invention; Fig.10 This is a diagram of a temporary support structure for a pipe segment opening according to the present invention; Fig.11 A three-dimensional effect diagram of the temporary support structure of the present invention being fixed to the pipe joint through a connector; Fig.12 It is a three-dimensional effect diagram of the temporary supporting structure of the present invention being fixed with the pipe joint through the embedded plate.

[0019] The numbers and corresponding names in the figure are: 1. No. 1 jacking tunnel, 11. First pipe section, 12. Second pipe section, 121. Longitudinal steel ring beam, 13. Third pipe section, 131. Transverse steel ring beam, 132. Detachable segments, 14. Steel beams, 2. No. 2 jacking tunnel, 21. Driving track, 22. Track top air duct, 23. Platform, 3. End well, 31. End entrance and exit, 32. Entrance and exit passage, 33. Wind pavilion, 4. Vertical shaft, 41. Connecting passage, 51. Central entrance and exit, 52. Entrance and exit passage, 61. Automatic ticket vending machine, 62. Security inspection equipment, 63. Entry and exit gates, 71. Escalators, 72. Vertical elevator, 73. Staircase. DETAILED DESCRIPTION Embodiment 1

[0020] A vertically superimposed subway station with a rectangular cross section, such as Figure 1-9As shown, it includes No. 1 jacking tunnel 1 and No. 2 jacking tunnel 2 constructed by jacking pipe sections with rectangular cross-sections. The width and height of the jacking pipe sections must at least meet the minimum width and height requirements for constructing a subway station with a one-way single lane and a platform 23. No. 1 jacking tunnel 1 is arranged parallel to No. 2 jacking tunnel 2, and the two ends of No. 1 jacking tunnel 1 and No. 2 jacking tunnel 2 are connected through two end wells 3 (i.e., the starting well and the receiving well). Both the starting well and the receiving well adopt a three-layer structure design, and the upper layer is mainly used for connecting with the auxiliary and connecting with the end entrance and exit 31 of the external subway station through the entrance and exit passage 32; the entrance and exit passage 32 is arranged with an automatic ticket vending machine 61, a security inspection device 62 and an entry and exit gate 63. The middle layer and the lower layer are respectively connected to No. 1 jacking tunnel 1 and No. 2 jacking tunnel 2. The starting shaft and the receiving shaft are provided with escalators 71, vertical elevators 72 and stairs 73, so that passengers can travel up and down from the end entrance 31 to the middle platform 23 and the bottom platform 23 below. The No. 1 jacking tunnel 1 and the No. 2 jacking tunnel 2 are provided with a driving track 21 and a track top air duct 22 on one side, and a platform 23 on the other side, and the platforms 23 in the two jacking tunnels are arranged on the same side of the two jacking tunnels. The No. 1 jacking tunnel 1 and the No. 2 jacking tunnel 2 are provided with a vertical shaft 4 on the outside of the platform 23 side, and the upper and lower ends of the vertical shaft 4 are connected to the No. 1 jacking tunnel 1 platform and the No. 2 jacking tunnel 2 platform 23 through a connecting passage 41, respectively. At least one of the escalator 71, vertical elevator 72 and stairs 73 can be provided inside the vertical shaft 4, so that passengers can transfer between the No. 1 jacking tunnel 1 and the No. 2 jacking tunnel 2 in the driving direction. The No. 1 jacking tunnel 1 and the No. 2 jacking tunnel 2 are provided with a middle entrance and exit 51 on the outer side of the platform 23 , and the middle entrance and exit 51 is connected to the No. 1 jacking tunnel 1 platform 23 or the shaft 4 through an entrance and exit passage 52 .

[0021] like Fig.10 As shown, the pipe segment of the jacking pipe adopts a prefabricated structure, and there are three structures, namely the first pipe segment 11, the second pipe segment 12 and the third pipe segment 13, and the three pipe segments have the same size. The first pipe segment 11 is a standard annular pipe segment of steel concrete structure, which is used for the main part of the No. 1 jacking tunnel 1 and the No. 2 jacking tunnel 2; the second pipe segment 12 and the third pipe segment 13 are used for the parts of the No. 1 jacking tunnel 1 and the No. 2 jacking tunnel 2 that need to be opened laterally. The second pipe segment 12 is a notch set at an outer end of one side of the first pipe segment 11, and a steel plate is embedded in the notch to form an annular pipe segment with the same size as the first pipe segment 11; the embedded steel plate of the second pipe segment 12 constitutes a longitudinal steel ring beam 121 of a detachable pipe segment with a lateral opening. The third pipe segment 13 is a C-shaped structure formed by setting a notch on one side of the first pipe segment 11, and pre-buried steel plates are placed at the upper and lower parts of the opening of the C-shaped structure. The upper and lower pre-buried steel plates are detachably connected by bolts using detachable pipe segments 132. The pre-buried steel plates of the third pipe segment 13 constitute a transverse steel ring beam 131 of a detachable top pipe segment with a lateral opening. After the detachable pipe segment 132 is removed, a connecting hole between the tunnel and the outside is formed. Embodiment 2

[0022] A construction method for a vertically superimposed subway station, the construction method comprising the following construction steps: S1. Prefabrication and customization of jacking pipe segments and other related parts: jacking pipe segments, temporary support main body L-shaped steel beams 14 and removable pipe segments 132 and other related parts are prefabricated or customized in the corresponding factory. The prefabricated jacking pipe segments include conventional jacking pipe segments (first pipe segments 11) of the same shape and size and removable jacking pipe segments with side openings (second pipe segments 12 and third pipe segments 13). The width and height of the jacking pipe segments must at least meet the minimum width and height requirements for constructing a subway station with a single-lane one-way lane and platform 23. At the same time, the prefabricated jacking pipe segments are pre-buried with connectors or pre-buried plates according to the temporary support installation position; S2. Construction of end wells: excavate the foundation pit, construct end well 3 (starting well and receiving well), and reserve corresponding starting tunnels and receiving tunnels for jacking tunnels. Each end well is reserved with starting or receiving tunnels for No. 1 jacking tunnel, No. 2 jacking tunnel, and adjacent section tunnels; at the same time, custom-made jacking machines and relay rooms, and prefabricated jacking pipe sections are manufactured in the factory.

[0023] S3. Construction of No. 2 pipe jacking tunnel: after the construction of the inner lining wall of the terminal shaft 3 is completed and reaches the required strength, install jacks, reaction frames, and slide rails in the shaft, and lower the pipe jacking machine into the shaft; use the pipe jacking method to break the starting shaft door, and advance from the starting shaft section by section to achieve the connection between the starting shaft and the receiving shaft and the No. 2 pipe jacking tunnel 2, and then carry out the subsequent construction of the terminal shaft 3 and the No. 2 pipe jacking tunnel 2 (including the construction of prefabricated secondary structures, running tracks 21, rail-top air ducts 22, platforms 23, etc.).

[0024] S4. Construction of No. 1 pipe jacking tunnel: Use pipe jacking method or shield method to construct No. 1 pipe jacking tunnel.

[0025] S5. Construction of the middle vertical shaft: construct a vertical shaft 4 on the outer side of the No. 1 jacking tunnel 1 and the No. 2 jacking tunnel 2 close to the platform 23. The vertical shaft 4 is constructed by open-cut method (ground-connected wall as enclosure), caisson or permanent and temporary combination to achieve vertical connection between the jacking tunnels and passenger transfer in the driving direction; in order to ensure construction error, the vertical shaft 4 is connected to the jacking tunnel through a connecting passage 41 to ensure construction safety.

[0026] S6. Build the subway wind shelter 33, safety passage, etc. on one side of the end shaft 3 by open-cut method.

[0027] S7. Construction of subway entrances and exits: Build the end entrance and exit 31 and the access passage 32 outside the end shaft 3, connect the end entrance and exit 31 with the wind pavilion 33 through the access passage 32, and arrange facilities such as automatic ticket vending machines 61, security inspection equipment 62 and access gates 63 in the access passage 52 to realize the functions of ticket purchase and security inspection of the station, and combine with the public area of ​​the station to form a complete station. Among them, the connection between the end entrance and exit 31 and the wind pavilion 33 or with the No. 1 jacking tunnel 1 is constructed by jacking method, open-cut vertical shaft 4, pipe curtain method or horizontal MJS method according to the actual situation. According to needs and convenience, the construction of subway entrances and exits also includes the construction of a central entrance and exit 51: the central entrance and exit 51 and the entrance and exit passage 52 are built at a suitable position outside the No. 1 jacking tunnel 1 or the No. 2 jacking tunnel 2 on the side of the platform 23, and the central entrance and exit 51 is connected to the No. 1 jacking tunnel 1 or the central entrance and exit 51 is connected to the shaft 4 through the entrance and exit passage 52. Facilities such as automatic ticket vending machines 61, security inspection equipment 62 and entrance and exit gates 63 are also arranged in the entrance and exit passage 52.

[0028] As a preference, Figure 10-12 As shown, in step S7, in the construction of the subway entrance and exit, the connection construction of the No. 1 jacking tunnel 1, the No. 2 jacking tunnel 2 and the shaft 4 or the No. 1 jacking tunnel 1 and the entrance and exit passage 52 includes the following steps: S71. Reinforce the soil layer between No. 1 and No. 2 jacking tunnels and the vertical shaft or between No. 1 jacking tunnel and the access passage. Grouting reinforcement method, freezing method or other methods can be selected according to actual conditions. Only after testing and confirming that the strength of the reinforced body reaches the design value can the connection passage be implemented.

[0029] S72. Set up temporary support structures at the opening location to enhance the stability of the tunnel at the opening location and prevent excessive deformation of the tunnel due to local weakening.

[0030] S73. Connect the steel ring beams around the opening in pairs (the longitudinal steel ring beams 121 of the second pipe segments 12 on both sides are respectively connected to the transverse steel ring beams 131 on the third pipe segments 13 adjacent thereto, and the two transverse steel ring beams 131 on two adjacent third pipe segments 13 are connected to each other) to form an integral ring frame beam around the opening.

[0031] S74. Remove the removable parts of the second pipe segment 12 on both sides of the tunnel opening, and observe and detect the stability of the soil outside the tunnel opening and whether there is water seepage while removing. If it is unsafe, suspend the removal and take necessary safety measures. After handling, continue to remove the other pipe segments in the reserved tunnel door until all the removable pipe segments of the entire reserved tunnel door are removed.

[0032] S75. Remove the removable parts of the second pipe segment 12 on both sides of the tunnel opening, and observe and detect the stability of the soil outside the tunnel opening and whether there is water seepage while removing. If it is unsafe, suspend the removal and take necessary safety measures. After handling, continue to remove the other pipe segments in the reserved tunnel door until all the removable pipe segments of the entire reserved tunnel door are removed.

[0033] S76. Remove temporary support structures.

[0034] The present invention constructs a No. 1 and No. 2 superimposed top-tube tunnels by using top-tube sections of width and height that meet the minimum requirements for constructing a subway station with a single-lane, one-way lane and a platform, and connects the top-tube tunnels of the upper and lower layers through the starting shaft, the receiving shaft and the lateral vertical shaft, so that the subway station can be built under complex environmental conditions such as densely populated central urban areas and narrow spaces, and the station process and functions can be effectively met. The project has strong feasibility, can shorten the construction period, reduce construction risks, reduce the excavation area, optimize traffic relief, realize prefabricated construction through prefabricated components, is green and environmentally friendly, has stronger practicality, has the advantages of simple structure, reasonable design, low production cost, etc. Rapid and safe construction of the subway can be achieved through prefabricated pipe sections and detachable second and third pipe sections, as well as temporary support structure design, and the detachable pipe segments and temporary support bodies after disassembly can also be used for later construction.

[0035] Among them, the specific structure of the detachable jacking pipe section and the detailed structure of the temporary support structure in the present invention can refer to the two patent applications with application numbers 2024223273341 and 2024223271505 filed by the applicant on September 24, 2024.

[0036] The present invention is not limited to the above-mentioned specific implementation modes. For ordinary technicians in this field, various changes made based on the above-mentioned conception without creative work all fall within the protection scope of the present invention.

Claims

1. A vertically superimposed subway station with a rectangular cross section, characterized in that: The invention comprises a No. 1 jacking tunnel with a full standard section constructed by jacking tube sections with rectangular cross-sections and a No. 2 jacking tunnel with a full standard section, the width and height of the jacking tube sections shall at least meet the minimum width and height requirements for constructing a subway station with a one-layer one-way single lane and a platform; the No. 1 jacking tunnel is arranged in parallel above the No. 2 jacking tunnel, and the two ends of the No. 1 jacking tunnel and the No. 2 jacking tunnel are connected through a starting shaft and a receiving shaft respectively; a driving track and a track top air duct are arranged on one side of the No. 1 jacking tunnel and the No. 2 jacking tunnel, and a platform is arranged on the other side, and the platforms in the two jacking tunnels are arranged on the same side of the two jacking tunnels, the No. 1 jacking tunnel and the No. 2 jacking tunnel are provided with a vertical shaft on the outer side of the platform side, and the upper and lower ends of the vertical shaft are connected to the No. 1 jacking tunnel platform and the No. 2 jacking tunnel platform through a connecting passage respectively, and at least one of an escalator, a vertical elevator and a step ladder is arranged inside the vertical shaft for passengers to transfer between the No. 1 jacking tunnel and the No. 2 jacking tunnel in the driving direction.

2. A vertically superimposed rectangular section subway station according to claim 1, characterized in that: The starting shaft and the receiving shaft are connected to the end entrances and exits through access passages, respectively. Automatic ticket vending machines, security inspection equipment and entry and exit gates are arranged in the access passages. Escalators, vertical elevators and stairs are provided in the starting shaft and the receiving shaft to enable passengers to go up and down from the end entrances and exits to the two platforms.

3. A vertically superimposed rectangular section subway station according to claim 2, characterized in that: The starting well and the receiving well both have three layers, the upper layer is mainly used for connecting with the ancillary; the middle layer and the lower layer are respectively connected to the No. 1 jacking tunnel and the No. 2 jacking tunnel.

4. A vertically superimposed rectangular section subway station according to claim 2, characterized in that: The No. 1 jacking tunnel and the No. 2 jacking tunnel are provided with middle entrances and exits on the outer sides of the platform side, and the middle entrances and exits are connected to the No. 1 jacking tunnel platform or the vertical shaft through the entrance and exit passage.

5. A construction method for a vertically superimposed subway station according to claim 1, characterized in that: The construction steps include: S1. Prefabrication and customization of jacking pipe sections and other related parts: prefabricate or customize jacking pipe sections, temporary support bodies and other related parts in corresponding factories. Prefabricated jacking pipe sections include conventional jacking pipe sections of the same shape and size and detachable jacking pipe sections with side openings; and ensure that the width and height of the jacking pipe sections at least meet the minimum width and height requirements for constructing a subway station with a single-lane one-way lane and platform; S2. Construction of terminal wells: excavation of foundation pits, construction of starting wells and receiving wells, and corresponding reservation of starting tunnels and receiving tunnels for jacking tunnels. In each terminal well, reservation of starting or receiving tunnels for No. 1 jacking tunnel, No. 2 jacking tunnel, and adjacent section tunnels; S3. Construction of No. 2 pipe jacking tunnel: Use pipe jacking method or shield method to construct No. 2 pipe jacking tunnel; S4. Construction of No. 1 pipe jacking tunnel: Use pipe jacking method or shield method to construct No. 1 pipe jacking tunnel; S5. Construction of the middle shaft: A shaft is constructed on the outer side of the No. 1 and No. 2 jacking tunnels near the platform. The shaft construction adopts open-cut method, caisson or a combination of permanent and temporary methods to achieve vertical connection between the jacking tunnels and passenger transfer in the driving direction; S6. Construction of wind shelter and safety passage: Build wind shelter and safety passage on one side of the end well by open excavation method; S7. Construction of subway entrances and exits: Build end entrances and exits and access passages outside the end shaft, connect the end entrances and exits with the wind shelter through the access passages, and arrange automatic ticket vending machines, security inspection equipment and entry and exit gates in the access passages.

6. The construction method according to claim 5, characterized in that: The step S7 of constructing subway entrances and exits also includes the construction of a central entrance and exit: a central entrance and exit and an access passage are constructed at a suitable position outside the No. 1 jacking tunnel or the No. 2 jacking tunnel on the platform side, and the central entrance and exit are connected to the No. 1 jacking tunnel or the central entrance and exit are connected to the shaft through the access passage, and ticketing facilities, security inspection facilities and access gates are arranged in the access passage.

7. The construction method according to claim 5 or 6, characterized in that: In the step S7 of constructing the subway entrance and exit, the connection between the end entrance and exit and the wind pavilion or the No. 1 jacking tunnel is constructed by jacking method, open-cut shaft, pipe curtain method or horizontal MJS method according to the actual situation.

8. The construction method according to claim 6, characterized in that: In the step S7 of constructing the subway entrance and exit, the connection between the No. 1 jacking tunnel and the No. 2 jacking tunnel and the shaft or the No. 1 jacking tunnel and the entrance and exit passage includes the following construction steps: S71. Reinforce the soil layer between the No. 1 and No. 2 jacking tunnels and the shaft or between the No. 1 jacking tunnel and the access passage. Grouting reinforcement method, freezing method or other methods may be selected according to actual conditions; After testing and confirming that the strength of the reinforcement reaches the design value, the channel connection will be implemented; S72. Temporary support structures shall be erected at the opening location to enhance the stability of the tunnel at the opening location and prevent excessive deformation of the tunnel due to local weakening; S73. Connect the reserved steel members corresponding to each ring pipe segment connected to the removable member around the opening with the reserved steel members of the adjacent pipe segments in pairs to form an integral ring frame beam around the opening; S74. Remove the removable parts of each pipe section in the reserved hole in turn, observe and test the stability of the soil outside the hole and whether there is water seepage while removing. If it is unsafe, stop the removal and take necessary safety measures. After handling, continue to remove the other pipe sections in the reserved hole until all the removable pipe sections of the entire reserved hole are removed; S75. Excavate the soil between the No. 1 and No. 2 jacking tunnels and the vertical shaft or between the No. 1 jacking tunnel and the access passage, and construct the reserved passage between the No. 1 and No. 2 jacking tunnels and the vertical shaft or between the No. 1 jacking tunnel and the access passage; complete other reserved passages between the No. 1 and No. 2 jacking tunnels and the vertical shaft or between the No. 1 jacking tunnel and the access passage; S76. Remove temporary support structures.

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