Subway station mechanically excavated and expanded in sequence from tunnel to station and construction method of subway station

Abstract

The invention discloses a tunnel-first and station-second mechanical underground excavation and expansion subway station and a construction method, and the subway station is located between two parallel subway interval tunnels and comprises a pipe jacking connection interval located between the two subway interval tunnels. Each pipe jacking connection section extends in the length direction of the subway section tunnel, and shafts are arranged at the two ends of each pipe jacking connection section. Each metro interval tunnel is connected with the pipe jacking connection interval through more than one connection channel; each vertical shaft is of a structure that a subway station is communicated with the ground. During construction, the vertical shaft is firstly built, and meanwhile the metro interval tunnel is constructed; a pipe jacking connection interval is built between the two vertical shafts; and finally, all the channels are constructed. A mechanical method is adopted for construction, and rapid, intensive and low-influence construction of subway engineering is achieved on the premise that few ground resources are occupied and the influence on the surrounding environment is small.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of subway station construction, in particular to a subway station constructed by mechanical excavation after tunneling and a construction method thereof. BACKGROUND

[0002] The conventional construction sequence of a subway is to construct a station first, and then to construct a tunnel by shield tunneling after the station is ready for shield tunneling. Since the construction period of the conventional construction method is usually restricted by the construction progress of the station, some subways have attempted to construct a station after tunneling, mainly by using the mine method and the pipe roof method.

[0003] However, the construction methods mainly using the mine method and the pipe roof method are difficult to adapt to soft soil areas, and with the increasingly scarce land resources in densely populated areas, the increasingly harsh surrounding construction conditions, and the increasing depth of tunnel embedding, the current construction method is difficult to meet the requirements of future construction.

[0004] Therefore, how to construct a deep subway station by the method of constructing a station after tunneling under the geological conditions of soft soil and rich water, adapt to the development trend of limited space operation and extremely low environmental impact in the central urban area, has become a technical problem to be solved by those skilled in the art. SUMMARY

[0005] In view of the above defects of the prior art, the present application provides a subway station constructed by mechanical excavation after tunneling and a construction method thereof, which realizes efficient, intensive and low-impact construction of a subway project adapted to soft soil areas and deep underground space development under the premise of occupying less ground resources and having little impact on the surrounding environment.

[0006] To achieve the above-mentioned purpose, the present application discloses a subway station constructed by mechanical excavation after tunneling, which is located between two parallel subway intertunnel sections; characterized in that it comprises pipe jacking connecting sections located between the two subway intertunnel sections;

[0007] Each pipe jacking connecting section extends along the length direction of the subway intertunnel section, and both ends are provided with a vertical shaft;

[0008] Each subway intertunnel section is connected to at least one layer of the pipe jacking connecting section through one or more connecting channels;

[0009] Each vertical shaft is a structure connecting the ground of the subway station.

[0010] Preferably, a pedestrian entrance and exit, corresponding elevators and stairs, a ventilation opening structure and corresponding air shafts, and an emergency passage are arranged in each vertical shaft.

[0011] Preferably, two layers of pipe jacking connecting sections are arranged between the two vertical shafts.

[0012] More preferably, the top pipe liaison section of the upper layer is a station hall, which is internally provided with ticket gates for entering and exiting the station, and escalators / stairs for entering the top pipe liaison section of the lower layer;

[0013] The top pipe liaison section of the lower layer is an island platform, which is internally provided with escalators / stairs for entering the top pipe liaison section of the upper layer, and emergency doors for entering an emergency passage.

[0014] Preferably, each of the liaison passages is arranged at a position corresponding to a door of a subway train in the corresponding subway interval tunnel, as a passage between the corresponding platform and the subway train, and extends to the gauge of the subway train and is connected to an evacuation platform at a standard section of the corresponding subway interval tunnel.

[0015] Preferably, the longitudinal profile of each of the subway interval tunnels is consistent with the longitudinal profile of the top pipe liaison section connected by the liaison passage.

[0016] The application also provides a construction method of a subway station expanded by a mechanical underground excavation method, for constructing the above-mentioned subway station expanded by the mechanical underground excavation method, which comprises the following steps:

[0017] Step 1: constructing shafts, and simultaneously constructing the subway interval tunnels;

[0018] Step 2: constructing a top pipe liaison section between the two shafts;

[0019] Step 3: constructing all of the liaison passages.

[0020] Preferably, each of the shafts is constructed by using an assembled mechanical shaft construction technology, the top pipe liaison section is constructed by using a quasi-rectangular top pipe structure construction technology, and each of the liaison passages is constructed by using a rectangular top pipe construction technology.

[0021] Preferably, when the top pipe liaison section is constructed, the shafts at both ends of the top pipe liaison section are used as a starting shaft and a receiving shaft of the quasi-rectangular top pipe structure, respectively, and when each of the liaison passages is constructed, the corresponding top pipe liaison section is used as a starting shaft of the rectangular top pipe, and the corresponding subway interval tunnel is used as a receiving shaft of the rectangular top pipe.

[0022] The application has the following beneficial effects:

[0023] The application is constructed by using a mechanical method, which realizes efficient, intensive and low-impact construction of a subway project under the premise of occupying less ground resources and having less impact on the surrounding environment.

[0024] The assembly type mechanized shaft construction technology, the shield method and the pipe jacking method adopted by the application are all applicable to soft soil areas, and break through the application limitation of the current mine method, pipe shed method and other construction methods.

[0025] The application maximally utilizes the trenchless technology and adopts the mechanical method to reduce the environmental and social influence and adapt to the development of deep underground space.

[0026] The application can also be applied to the addition of a station in an existing subway engineering, and the station structure is constructed by designing the component size suitable for the adjacent shield section and using the construction method.

[0027] The application has high industrialization and green degree, high construction efficiency and low labor cost in the construction process, and meets the development trend of the municipal industry green and industrialization.

[0028] The concept, specific structure and generated technical effects of the application will be further described below with reference to the drawings, so as to fully understand the purpose, features and effects of the application. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 A station structure plane schematic diagram at the elevation of the upper pipe jacking connection section in an embodiment of the application is shown.

[0030] Figure 2 A station structure plane schematic diagram at the elevation of the lower pipe jacking connection section in an embodiment of the application is shown.

[0031] Figure 3 A building arrangement plane schematic diagram of the upper pipe jacking connection section as a station hall in an embodiment of the application is shown.

[0032] Figure 4 A building arrangement plane schematic diagram of the lower pipe jacking connection section as a station platform in an embodiment of the application is shown.

[0033] Figure 5 A station structure longitudinal section schematic diagram of the lower pipe jacking connection section provided with a connecting passage in an embodiment of the application is shown.

[0034] Figure 6 A station building arrangement longitudinal section schematic diagram of the lower pipe jacking connection section when a subway train stops in an embodiment of the application is shown.

[0035] Figure 7 A cross section structure schematic diagram of the shaft position in an embodiment of the application is shown.

[0036] Figure 8 A subway section tunnel standard structure cross section schematic diagram in an embodiment of the application is shown.

[0037] Figure 9A structural cross-sectional schematic diagram of a top pipe liaison section in an embodiment of the present application is shown.

[0038] Figure 10 A structural cross-sectional schematic diagram of a top pipe liaison section provided with a communication passage position in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0039] EMBODIMENT

[0040] As shown, the mechanical underground expansion subway station with a first tunnel and a second station comprises a top pipe liaison section between two parallel subway section tunnels 1. Figures 1 to 10

[0041] The top pipe liaison section 2 is preferably two or more layers.

[0042] Each top pipe liaison section 2 extends along the length direction of the subway section tunnel 1, and is provided with a vertical shaft 3 at each end.

[0043] Each subway section tunnel 1 is connected to at least one layer of the top pipe liaison section 2 through one or more communication passages 4.

[0044] Each vertical shaft 3 is a structure for connecting the subway station to the ground.

[0045] The main function of the vertical shaft 3 in the present application is an entrance and exit, and is connected to the top pipe liaison section 2.

[0046] The main function of the lower layer top pipe liaison section 2 is a station platform layer, and the main function of the upper layer top pipe liaison section 2 is a station hall layer.

[0047] In some embodiments, each vertical shaft 3 is provided with a pedestrian entrance and exit 31 and corresponding elevators and stairs, a ventilation structure 32 and corresponding air shafts, and an emergency passage 33.

[0048] In some embodiments, two layers of top pipe liaison sections 2 are provided between two vertical shafts 3.

[0049] In some embodiments, the upper layer top pipe liaison section 2 is a station hall, which is internally provided with a gate 21 for entering and exiting the station, and an escalator / stair 22 for entering the lower layer top pipe liaison section 2.

[0050] The lower layer top pipe liaison section 2 is an island platform, which is internally provided with an escalator / stair 22 for entering the upper layer top pipe liaison section 2, and an emergency door 23 for entering the emergency passage 33.

[0051] In actual application, the lower layer top pipe liaison section 2 is provided with a normally closed emergency door 23 between the two vertical shafts 3, which is in a closed state during daily operation and is opened when emergency evacuation is required. ​

[0052] In some embodiments, each connecting passage 4 corresponds to the position of the door 51 of the subway train 5 in the corresponding subway section tunnel 1, and serves as a passage between the corresponding platform and the corresponding subway train 5, and extends to the gauge of the subway train 5 and the evacuation platform 11 at the standard section of the corresponding subway section tunnel 1.

[0053] One end of the connecting passage 4 is connected to the door 51 of the subway train 5, and the other end is connected to the platform, which is a passage for passengers to pass between the train and the platform.

[0054] In practical applications, the bottom plate of the connecting passage 4 extends to the gauge of the subway train 5 and is connected to the longitudinal evacuation platform 11 at the standard section of the corresponding subway section tunnel 1, forming a space for personnel to walk longitudinally.

[0055] In some embodiments, the minimum distance between each shaft 3 and each subway section tunnel 1 is not less than 2 meters, and the distance between each layer of pipe-jacking connecting section 2 and each subway section tunnel 1 is 2 meters ± 5%.

[0056] In practical applications, the planar distance between the two subway section tunnels 1 at the position of the shaft 3 is large, so that each subway section tunnel 1 and the shaft 3 maintain a certain clearance to ensure that the influence of the construction of the adjacent structure is small, and the minimum distance between the shaft 3 and the subway section tunnel 1 is not less than 2 meters.

[0057] The planar distance between the two subway section tunnels 1 at the position of each layer of pipe-jacking connecting section 2 in the middle of the station is small, so that each subway section tunnel 1 and the pipe-jacking connecting section 2 maintain a certain clearance to ensure that the influence of the construction of the adjacent structure is small, and the length of the connecting passage of the pipe-jacking connecting section 2 is short, and the clearance is generally about 2 meters.

[0058] In some embodiments, the longitudinal profile of each subway section tunnel 1 is consistent with the longitudinal profile of the pipe-jacking connecting section 2 connected by the connecting passage 4.

[0059] In practical applications, the above technical means can ensure that the pipe-jacking connecting section 2 and the connecting passage 4 between the pipe-jacking connecting section 2 and the corresponding subway section tunnel 1 are constructed more smoothly.

[0060] The present application also provides a construction method of a mechanical excavation and expansion subway station with a tunnel first and a station second, which is used for constructing the above mechanical excavation and expansion subway station with a tunnel first and a station second, and includes the following steps:

[0061] Step 1, building a shaft 3 while constructing a subway section tunnel 1;

[0062] Step 2, building a pipe-jacking connecting section 2 between two shafts 3;

[0063] Step 3, constructing all connecting passages 4.

[0064] In some embodiments, each shaft 3 is built by using fabricated mechanized shaft building technology; the pipe-jacking connection section 2 is built by using quasi-rectangular pipe-jacking structure building technology; and each connection passage 4 is built by using rectangular pipe-jacking building technology.

[0065] In some embodiments, when the pipe-jacking connection section 2 is built, the shafts 3 at both ends of the pipe-jacking connection section 2 are used as the starting shaft and the receiving shaft of the quasi-rectangular pipe-jacking structure respectively; and when each connection passage 4 is built, the corresponding pipe-jacking connection section 2 is used as the starting shaft of the rectangular pipe-jacking, and the corresponding metro section tunnel 1 is used as the receiving shaft of the rectangular pipe-jacking.

[0066] The preferred embodiments of the present application are described in detail above. It should be understood that those skilled in the art can make many modifications and variations without departing from the concept of the present application. Therefore, any technical solution obtained by logical analysis, reasoning or limited experiments based on the prior art according to the concept of the present application should be within the scope of protection defined by the claims.

Claims

1. A metro station constructed by mechanical excavation and tunneling prior to station construction, located between two parallel metro tunnel sections (1); characterized in that, This includes the pipe jacking connecting section (2) located between the two metro tunnel sections (1); Each of the aforementioned pipe jacking connecting sections (2) extends along the length direction of the subway tunnel (1), and is provided with vertical shafts (3) at both ends; Each of the aforementioned subway tunnel sections (1) is connected to the pipe jacking connecting section (2) via one or more connecting passages (4); Each of the shafts (3) is a structure connecting the subway station to the ground.

2. The subway station constructed by mechanical excavation and tunneling according to claim 1, characterized in that, Each of the vertical shafts (3) is equipped with a pedestrian entrance (31) and corresponding elevators and stairs, a ventilation structure (32) and corresponding ventilation shafts, and an emergency passage (33).

3. The subway station constructed by mechanical excavation and tunneling according to claim 1, characterized in that, The pipe jacking connection section (2) is provided between the two shafts (3).

4. The subway station constructed by mechanical excavation and tunneling according to claim 3, characterized in that, When the pipe jacking connection section (2) has two or more floors, the upper pipe jacking connection section (2) is a station hall, which is equipped with turnstiles (21) for ticket checking for entering and exiting the station, and escalators / stairs (22) for entering the lower pipe jacking connection section (2). The lower-level pipe jacking connection section (2) is an island platform, which is equipped with escalators / stairs (22) for entering the upper-level pipe jacking connection section (2) and emergency doors (23) for entering the emergency passage (33).

5. The subway station constructed by mechanical excavation and tunneling according to claim 1, characterized in that, Each of the connecting passages (4) is located at the door (51) of the subway train (5) in the corresponding subway tunnel (1), serving as a passage between the corresponding platform and the corresponding subway train (5), and extending to the limit of the subway train (5), and connecting smoothly with the evacuation platform (11) at the standard section of the corresponding subway tunnel (1).

6. The subway station constructed by mechanical excavation and tunneling according to claim 1, characterized in that, The longitudinal profile of each of the metro tunnel sections (1) is consistent with the longitudinal profile of the pipe jacking connecting section (2) connected by the connecting passage (4).

7. A construction method for subway stations using a tunnel-first, station-later mechanical excavation expansion technique, characterized in that... The method for constructing a subway station using the pre-tunneling and subsequent mechanical excavation expansion method as described in any one of claims 1 to 6 includes the following steps: Step 1: Construct the vertical shaft (3) and simultaneously construct the subway section tunnel (1); Step 2: Construct a pipe jacking connection section (2) between the two shafts (3); Step 3: Construct all connecting passages (4).

8. The construction method for a subway station expanded by mechanical excavation and tunneling according to claim 8, characterized in that, Each of the vertical shafts (3) is constructed using prefabricated mechanized vertical shaft construction technology; the pipe jacking connecting section (2) is constructed using a rectangular pipe jacking structure construction technology; and each of the connecting passages (4) is constructed using a rectangular pipe jacking construction technology.

9. The construction method for a subway station expanded by mechanical excavation and tunneling according to claim 9, characterized in that, When constructing the pipe jacking connecting section (2), the vertical shafts (3) at both ends of the pipe jacking connecting section (2) serve as the starting shaft and receiving shaft of the rectangular pipe jacking structure, respectively; when constructing each connecting passage (4), the corresponding pipe jacking connecting section (2) serves as the starting shaft of the rectangular pipe jacking, and the corresponding subway tunnel (1) serves as the receiving shaft of the rectangular pipe jacking.

Images