A method for integrally constructing a station and a section tunnel

Abstract

The application discloses a method for integrally constructing a station and a section tunnel, and is characterized in that the method comprises station tunnel construction and section tunnel construction; during construction, a station position is selected according to station setting conditions on the ground, and necessary end shafts are completed; then, two shield machines or pipe jacking machines are used to vertically combine and excavate to complete main construction of a full standard section of a first station tunnel; one shield machine or pipe jacking machine is used to complete main construction of a full standard section of a second station tunnel; then, a section tunnel is completed, and a connecting passage is constructed between the two station tunnels to form a combined structure with an L-shaped section, and the station tunnels are connected with each other; then, station construction, equipment area arrangement and construction wind pavilion construction are performed; an entrance is constructed to be connected with an upper part of the first station tunnel, and a complete station and a section tunnel are formed. The method has high implementability and small risk, and creates a new idea for constructing a subway station by using a large-area open excavation method under complex environmental conditions in a central city.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of subway and tunnel construction, and particularly relates to a method for integrally constructing a station and a section tunnel by using a rectangular cross-section eccentric combined tunneling machine. BACKGROUND

[0002] In the urban center area, there are often various dense buildings on the ground, and various pipelines are often densely distributed under the ground. The ground road in the center area of the ancient city is not wide, the traffic is very busy, and there are factors such as the red line restriction on both sides of the road. If the traditional open cut method and cover excavation method are still used for the construction of the subway station and section, multiple challenges will be faced, including the difficulty or disallowance of demolition, strict implementation conditions, high construction risk, difficulty in construction period control, and high pre-demolition cost. Therefore, it is of great significance to explore a new construction method with less land occupation, less demolition, less environmental impact, controllable construction period, less risk, and better economy for the construction of the subway station and section in the urban center area, especially in the center area of the ancient city.

[0003] In addition, since the cross-section size of the commonly used rectangular shield or pipe jacking is relatively limited, it is difficult to meet the functional and architectural layout requirements of the subway station. However, there are still many technical difficulties and high costs in the manufacture of equipment and on-site implementation of the super-large size rectangular shield or pipe jacking. Therefore, research on how to build a subway station and section by combining the rectangular cross-section of the existing specification shield or pipe jacking will provide an innovative idea for the construction of the subway station and section in the complex environment of the center city. SUMMARY

[0004] The present application aims to provide an integrally constructed method for a subway station and a circular section tunnel by spatially combining a rectangular cross-section shield or pipe jacking in the center area of the ancient city or other areas, which has strong engineering implementation and small risk, and can meet the requirements of traffic preservation, key cultural relic preservation, less disturbance to the people, less demolition, and other requirements in the complex environment of the center city. The combined subway station and section constructed by the method can effectively meet the functional requirements of the station and the driving function, and can achieve the goals of less demolition, less excavation, less pipeline relocation, less disturbance to the people, and better economy.

[0005] In order to achieve the above technical effects, the technical solution adopted by the present application is as follows:

[0006] An integrally constructed method for a station and a section tunnel, characterized in that it comprises station tunnel construction, and the station tunnel construction comprises the following steps:

[0007] S1. Construction of an end head well: first, the necessary end head well construction is completed;

[0008] S2. Main body construction of the first and second station tunnels: after the end well is completed and has the starting condition, the tunneling equipment is installed, the vertical combination tunneling construction is first used by two rectangular shield machines or pipe jacking machines, the main body construction of the first station tunnel is completed, after the main body construction of the first station tunnel is completed, the main body construction of the second station tunnel is completed by using one rectangular shield machine or pipe jacking machine to push, and the parts of the main body of the first station tunnel and the main body of the second station tunnel which need to be connected by the connecting passages and the parts of the main body of the first station tunnel which need to be connected by the entrance and exit passages are all installed with the hole opening pipe joint with the lateral reserved opening hole, and the other parts are the conventional main body pipe joint.

[0009] S3. Connection construction of the first and second station tunnels: several connecting passages are built between the first and second station tunnels by the underground excavation method, the first and second station tunnels form the L-shaped cross section combination structure in the cross section, and the mutual connection of the two station tunnels is realized.

[0010] S4. Station construction: the assembled secondary structure is constructed, the interlayer column, the middle slab beam and the middle slab structure of the bottom slab of the end well are constructed.

[0011] S5. Equipment area arrangement: the equipment area is arranged in the first station tunnel, and the corresponding equipment is installed.

[0012] S6. Construction of the wind pavilion: according to the ground conditions, the construction position of the wind pavilion is selected, and the wind pavilion is constructed by the open excavation construction or the vertical tunneling construction.

[0013] S7. Entrance and exit construction: according to the specific geological conditions and environmental conditions, the entrance and exit are built by the pipe jacking method or the open excavation method, the entrance and exit are connected with the first station tunnel through the entrance and exit passage, and the complete station is formed.

[0014] Further, the main body construction of the first and second station tunnels includes the following steps:

[0015] Further, in the main body construction of the first and second station tunnels, the shield machine or pipe jacking machine of the lower half of the tunneling equipment used for the vertical combination to complete the main body construction of the first station tunnel and the shield machine or pipe jacking machine used for the main body construction of the second station tunnel are all the mother-son machine structures, the internal part of the rectangular shield machine or pipe jacking machine of the mother machine includes one eccentric circular shield son machine, and the son machines of the two are deviated to the lower part of the station, so as to coordinate the position relationship between the interval tunnel and the station platform.

[0016] Further, the interval tunnel construction includes the following steps:

[0017] S I. The main body construction of the first interval tunnel: after the main body construction of the first station tunnel is completed, the combined connection relationship between the child machine and the parent machine under the first tunneling equipment is released, the child machine is separated from the parent machine, and then the independent tunneling construction of the main line is continued until the construction of the first interval tunnel is completed.

[0018] S II. The main body construction of the second interval tunnel: after the main body construction of the second station tunnel is completed, the combined connection relationship between the child machine and the parent machine under the second tunneling equipment is released, the child machine is separated from the parent machine, and then the independent tunneling construction of the main line is continued until the construction of the second interval tunnel is completed.

[0019] Further, the main body construction of the first and second station tunnels in step S2 further comprises a prefabrication step of the pipe segments of the first and second station tunnels before construction, and a pipe segment assembly step of assembling the pipe segments to form the rectangular cross-section pipe segments of the corresponding station tunnels during construction; the pipe segment prefabrication step comprises pipe segment prefabrication of the main body pipe segments and the hole pipe segments of the first and second station tunnels; the pipe segment assembly step comprises assembly of the main body pipe segments and the hole pipe segments of the first and second station tunnels.

[0020] Further, the pipe segment prefabrication of the main body pipe segments of the first station tunnel comprises prefabricating two identical U-shaped general pipe segments, two identical straight-shaped general pipe segments and a middle beam to constitute each main body pipe segment; when prefabricating the U-shaped general pipe segments, the two ends of the U-shaped general pipe segments are ensured to have different heights, and steel members are embedded on the two end faces of the U-shaped general pipe segments, and the inner side of the steel members is welded with the pull reinforcement and the internal main reinforcement; when prefabricating the straight-shaped general pipe segments, steel members are also embedded on the two end faces of the straight-shaped general pipe segments, and the inner side of the steel members is also welded with the pull reinforcement and the internal main reinforcement, and the straight-shaped general pipe segments are also ensured to have a steel plate embedded on the set position of the side face of the straight-shaped general pipe segments during prefabrication, and the inner side of the steel plate is welded with the stud; when prefabricating the middle beam, steel plates are also embedded on the two ends of the middle beam, and the inner side of the steel plates is also welded with the stud.

[0021] Further, when the main body pipe segments of the first station tunnel are assembled, the joints of the U-shaped general pipe segments and the straight-shaped general pipe segments of the adjacent two main body pipe segments are staggered with each other.

[0022] Further, the main pipe joint assembly method of the first station tunnel comprises the steps of abutting and welding the steel plates pre-buried at the two ends of the middle beam with the steel plates on the two linear general pipe pieces respectively to form an H-shaped body with different heights at the two ends, abutting the four end portions of the H-shaped body with the two ends of the two U-shaped general pipe pieces respectively, and fastening the abutting steel components by bolts to form a rectangular structure with the middle beam connected inside.

[0023] Further, the prefabricated pipe piece of each detachable pipe joint comprises a detachable pipe piece, a U-shaped pipe piece A or a U-shaped pipe piece B, and a linear pipe piece A combined with the U-shaped pipe piece A or a linear pipe piece B combined with the U-shaped pipe piece B; during the prefabrication, the U-shaped pipe piece A and the U-shaped pipe piece B are guaranteed to be different from the U-shaped general pipe piece only in the height of the two ends, the one end of the U-shaped pipe piece A is guaranteed to be the same in height as the one end of the U-shaped general pipe piece, the other end of the U-shaped pipe piece A is guaranteed to be the same in height as the one end of the U-shaped pipe piece B, and the other end of the U-shaped pipe piece B is guaranteed to be the same in height as the other end of the U-shaped general pipe piece; at the same time, the linear pipe piece A and the linear pipe piece B are guaranteed to be different from the linear general pipe piece only in length, the distance from the pre-buried steel plate on the linear pipe piece A to the one end thereof is the same as the distance from the pre-buried steel plate on the linear pipe piece B to the one end thereof, the distance from the pre-buried steel plate on the linear pipe piece A to the other end thereof is the same as the distance from the pre-buried steel plate on the linear general pipe piece to the one end thereof, and the distance from the pre-buried steel plate on the linear pipe piece B to the other end thereof is the same as the distance from the pre-buried steel plate on the linear general pipe piece to the other end thereof.

[0024] Further, the prefabricated pipe piece of each detachable pipe joint comprises a detachable pipe piece, a U-shaped pipe piece A or a U-shaped pipe piece B, and a linear pipe piece A combined with the U-shaped pipe piece A or a linear pipe piece B combined with the U-shaped pipe piece B; during the prefabrication, the U-shaped pipe piece A and the U-shaped pipe piece B are guaranteed to be different from the U-shaped general pipe piece only in the height of the two ends, the one end of the U-shaped pipe piece A is guaranteed to be the same in height as the one end of the U-shaped general pipe piece, the other end of the U-shaped pipe piece A is guaranteed to be the same in height as the one end of the U-shaped pipe piece B, and the other end of the U-shaped pipe piece B is guaranteed to be the same in height as the other end of the U-shaped general pipe piece; at the same time, the linear pipe piece A and the linear pipe piece B are guaranteed to be different from the linear general pipe piece only in length, the distance from the pre-buried steel plate on the linear pipe piece A to the one end thereof is the same as the distance from the pre-buried steel plate on the linear pipe piece B to the one end thereof, the distance from the pre-buried steel plate on the linear pipe piece A to the other end thereof is the same as the distance from the pre-buried steel plate on the linear general pipe piece to the one end thereof, and the distance from the pre-buried steel plate on the linear pipe piece B to the other end thereof is the same as the distance from the pre-buried steel plate on the linear general pipe piece to the other end thereof.

[0025] Further, when two adjacent detachable pipe joints are assembled and connected, one is assembled by the A scheme of the U-shaped pipe piece A and the linear pipe piece A to form an A pipe joint, and the other is assembled by the B scheme of the U-shaped pipe piece B and the linear pipe piece B to form a B pipe joint, and the A pipe joint and the B pipe joint are alternately connected among multiple detachable pipe joints.

[0026] Further, when the edge pipe joint and the detachable pipe joint are assembled and connected, when the adjacent detachable pipe joint is the A pipe joint, the edge pipe joint is assembled with the B edge pipe joint formed by the U-shaped pipe piece B and the linear pipe piece B, and vice versa.

[0027] Compared with the prior art, the present application has the beneficial effects that:

[0028] The present application uses two shield machines or pipe jacking machines to vertically combine and excavate to complete the main construction of the No.1 station tunnel; then uses one shield machine or pipe jacking machine to push to complete the main construction of the No.2 station tunnel; and then builds several connecting passages between the No.1 station tunnel and the No.2 station tunnel to form an L-shaped cross-section combined structure in the cross-section of the No.1 station tunnel and the No.2 station tunnel; thus the combined subway station built by the method of the present application can effectively meet the station function, can realize the protection of the original key cultural relics, less demolition, less excavation, less pipeline relocation, less disturbance to the people, and good economy. The present application has strong implementability and small risk. At the same time, the construction of the two station tunnels with large and small sizes is connected locally to form an L-shaped end face, which can also greatly reduce the construction time and speed up the construction progress. In addition, after the excavation and construction of the station (including the station hall layer and the station platform layer) are completed by the eccentric combined circular shield tunneling machine in the rectangular cross-section shield or pipe jacking machine, the integrated construction of the station (including the station hall layer and the station platform layer) and the interval tunnel is realized, the construction comprehensive efficiency is improved, and the comprehensive goal of reducing ground excavation construction is achieved.

[0029] The above description is only a summary of the technical scheme of the present application, in order to more clearly understand the technical means of the present application, and to be implemented in accordance with the content of the specification, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below in combination with the drawings and examples. Obviously, the described examples are part of the examples of the present application, not all examples. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 The construction flowchart of the method of the present application is shown in the figure;

[0031] Figure 2 The cross-section structure diagram of the integrated station and interval of the present application is shown in the figure;

[0032] Figure 3 The pipe joint assembly and pushing state of the end head well of the No.1 and No.2 station tunnels of the present application is shown in the figure Figure 1 ;

[0033] Figure 4 The pipe joint assembly and pushing state of the end head well of the No.1 and No.2 station tunnels of the present application is shown in the figure Figure 2 ;

[0034] Figure 5 The L-shaped combined structure diagram of the present application after station construction is shown in the figure;

[0035] Figure 6 The structure diagram of the main pipe joint of the No.1 station tunnel of the present application after assembly is shown in the figure;

[0036] Figure 7For Figure 6 Enlarged view of site A;

[0037] Figure 8 For the assembled structure of the present application A pipe section schematic diagram;

[0038] Figure 9 For the connection structure diagram of the present application B pipe section and access channel;

[0039] Figure 10 For Figure 9 Enlarged view of site B;

[0040] Figure 11 For the connection structure diagram of the opening area of all hole pipe section at access channel;

[0041] Figure 12 For the connection structure diagram of the opening area of all hole pipe section at access channel;

[0042] Figure 13 For the plane view of the subway station after the implementation of the present application;

[0043] Figure 14 For the longitudinal section layout of the subway station after the implementation of the present application;

[0044] Figure 15 For the three-dimensional effect diagram of the station tunnel constructed by the method of the present application with the starting well and receiving well;

[0045] Figure 16 For the three-dimensional effect diagram of the station and interval tunnel constructed by the method of the present application with only starting well.

[0046] The corresponding names of the various labels in the figure are:

[0047] 1. No. 1 station tunnel, 11. station hall layer, 12. platform layer,

[0048] 13. main pipe section, 131. U-shaped general pipe piece, 132. one-shaped general pipe piece,

[0049] 133. middle beam, 134. steel member, 135. steel plate,

[0050] 14. hole pipe section, 141. detachable pipe piece, 142. U-shaped pipe piece A,

[0051] 143. one-shaped pipe piece A, 144. U-shaped pipe piece B, 145. one-shaped pipe piece B,

[0052] 146. steel vertical beam, 14a. edge pipe section, 14b. detachable pipe section,

[0053] 2. No. 2 station tunnel, 21. platform layer, 3. starting well,

[0054] 4. receiving well, 6. connecting passage, 7. entrance and exit,

[0055] 8. entrance and exit passage, 91. escalator, 92. vertical elevator,

[0056] 93. staircase, 10a. first interval tunnel, 10b. second interval tunnel. DETAILED DESCRIPTION

[0057] A method for integrally constructing a station and interval tunnels, as shown in Figures 1-16 , comprises station tunnel construction and interval tunnel construction.

[0058] The station tunnel construction comprises the following steps:

[0059] S1. Construction of the end well: first, select the station location according to the ground conditions, complete the necessary end well (i.e., complete the starting well 3), and the receiving well 4 can or can not be present, depending on the actual situation.

[0060] S2. Main construction of the first and second station tunnels: after the starting well 3 is completed and has the starting conditions, install the tunneling equipment, first use two rectangular shield machines or pipe jacking machines to vertically combine and tunnel, complete the main construction of the first station tunnel 1. After the first station tunnel 1 is completed, use one rectangular shield or pipe jacking machine to push, complete the main construction of the second station tunnel 2. When the two station tunnels are assembled and connected between the segments, ensure that the first station tunnel 1 and the second station tunnel 2 are installed with assembled opening segments 14 with side reserved opening holes at the positions connected with the pre-set connecting passages 6, and the first station tunnel 1 is installed with assembled opening segments 14 with side reserved opening holes at the positions connected with the pre-set entrance and exit passages 8, and the other positions use conventional assembled main segments 13.

[0061] S3. Connection construction of the first and second station tunnels: after the main construction of the first and second station tunnels is completed, perform the side opening construction of the first and second station tunnels, build several connecting passages 6 between the opposite opening holes of the first and second station tunnels 1 and 2 through the underground excavation method, so that the first and second station tunnels 1 and 2 form an L-shaped cross-section combined structure (as shown in Figure 5 ) in cross-section, realizing the mutual connection of the two station tunnels. Specifically, the opening construction comprises the following construction steps:

[0062] S31. In the position where the connecting passage 6 needs to be opened between the No. 1 station tunnel 1 and the No. 2 station tunnel 2, the soil layer between the two station tunnels is reinforced, and after reinforcement and detection, the strength and water seepage of the reinforced body are confirmed to reach the design value before the construction of the connecting passage 6 between the two tunnels is started. Among them, the soil reinforcement can be selected according to the actual conditions to use the grouting reinforcement method or use the freezing method.

[0063] S32. A temporary support structure is erected at the tunnel opening position to enhance the stability of the tunnel at the opening position and prevent deformation or excessive deformation of the tunnel due to local weakening. The temporary support structure can be implemented in a conventional manner, or using the temporary support construction method of application No. 2024113326648 filed by the applicant on September 24, 2024, and the temporary support structure of application No. 2024223271505 filed by the applicant on September 24, 2024. Of course, when using the temporary support construction method or support structure of the above-mentioned application numbers, the pipe segments should be pre-buried with corresponding components at the set position during prefabrication.

[0064] S33. Check and re-ensure that the ring-shaped steel beam around the hole opening pipe segment 14 (formed by connecting the ring-shaped steel structure of all U-shaped pipe segments A142, U-shaped pipe segments B144 adjacent to the detachable pipe segment 141, and all straight pipe segments A143, straight pipe segments B145 adjacent to the steel plate 135, and the steel vertical beams 146 on both sides) is in a tight connection state, so that it forms a ring frame with a firm connection around the hole opening.

[0065] S34. The detachable pipe segment 141 on each hole opening pipe segment 14 in the reserved hole opening is sequentially removed, and the stability of the soil outside the hole opening and whether there is water seepage are observed and detected while removing. If it is not safe, stop disassembly, and take necessary safety measures, and after processing, continue to remove the parts of other pipe segments that need to be removed in the reserved hole opening until all the detachable pipe segments in the whole reserved hole opening are removed.

[0066] S35. Excavate the soil between the No. 1 station tunnel 1 and the No. 2 station tunnel 2, and construct the connecting passage 6 between the two tunnels until all the reserved passages between the two tunnels are completed.

[0067] S36. Remove the temporary support structure.

[0068] S37. After the construction of all the reserved passages between the two tunnels is completed, the lower half of the No. 1 station tunnel 1 forms the platform layer 12, 21 of the station together with the No. 2 station tunnel 2 through the connecting passage 6.

[0069] S4. Station construction: construction of assembled secondary structure (including track top air duct, platform plate, tunnel middle plate, etc.), construction of interlayer column, middle plate beam and middle plate structure of the middle plate and bottom plate in the end well of the station.

[0070] S5. Arrangement of equipment area: arranging the equipment area in the tunnel 1 of the first station, setting the escalator 91, vertical elevator 92 and step ladder 93 to realize the up and down connection of personnel between the upper station hall layer 11 and the lower station platform layer 12, 21. Among them, the escalator 91 and the step ladder 93 can be arranged longitudinally or side by side according to the actual situation.

[0071] S6. Construction of wind pavilion: according to the ground conditions, the implementation position of the wind pavilion is selected, and the open excavation construction or vertical excavation construction is used to construct the wind pavilion. The starting well 3 and the receiving well 4 can be used as the station equipment arrangement space, and the escalator, step ladder 93, etc. can also be arranged. The specific architectural design in the station is flexibly arranged according to the actual situation and needs.

[0072] S7. Entrance construction: according to the specific geological conditions and environmental conditions, the entrance 7 is constructed by pipe jacking method or open excavation method, and is connected and combined with the tunnel 1 of the first station through the entrance passage 8 to form a complete station. According to the needs, the entrance and exit gate, security check machine, etc. can be arranged in the entrance passage 8 to realize the security check function, and the automatic ticket selling and taking machine, etc. can be arranged in the starting well 3 of the entrance 7 to realize the ticket purchasing function.

[0073] As preferred, in the step S2 of the method of the embodiment, the main construction of the first and second station tunnels further includes a prefabrication step of prefabricating the pipe segments of the rectangular pipe segments of the first station tunnel 1 and the second station tunnel 2 before construction, and a pipe segment assembly step of assembling the pipe segments to form the corresponding rectangular cross-section pipe segments of the station tunnels during construction. The pipe segment prefabrication includes prefabricating all pipe segments constituting the rectangular pipe segments of the first station tunnel 1 and prefabricating all pipe segments constituting the rectangular pipe segments of the second station tunnel 2. The pipe segment assembly also corresponds to assembling the corresponding pipe segments to form the rectangular cross-section pipe segments for the first station tunnel 1 and the rectangular cross-section pipe segments for the second station tunnel 2. The pipe segments and pipe segments for the second station tunnel 2 can be implemented according to the prior art or the detachable pipe jacking pipe segment structure of the application with application number 2024223273341 applied on September 24, 2024, and will not be described in detail. The embodiment mainly introduces the pipe segment prefabrication of the main pipe segment 13 of the first station tunnel 1 and the pipe segment prefabrication of the hole pipe segment 14 and the corresponding pipe segment assembly. The main pipe segment 13 or the hole pipe segment 14 mentioned below without limitation of the first station tunnel 1 or the second station tunnel 2 refers to the main pipe segment 13 or the hole pipe segment 14 of the first station tunnel 1.

[0074] S21. Prefabrication of the segments of the tunnel of the first station before construction: including prefabricating the segments of the main segments 13 of the first station tunnel 1 in the production factory and prefabricating the segments of the opening segments 14 at the opening areas of the tunnel.

[0075] The prefabrication of the segments of the main segments 13 includes prefabricating two identical U-shaped general segments 131, two identical straight-shaped general segments 132 and a middle beam 133 for each main segment 13. When prefabricating the U-shaped general segments 131, the two ends of the U-shaped general segments 131 are made different in height, and a steel member 134 is embedded on each of the two end faces of the U-shaped general segments 131, and a pull bar is welded inside the steel member 134 and connected with the internal main reinforcement of the segments. When prefabricating the straight-shaped general segments 132, a steel member 134 is also embedded on each of the two end faces of the straight-shaped general segments 132, and a pull bar is welded inside the steel member 134 and connected with the internal main reinforcement, and a steel plate 135 is embedded on a designated position of one side face of the straight-shaped general segments 132 during prefabrication of the straight-shaped general segments 132, and a stud is welded on the inner side face of the steel plate 135. When prefabricating the middle beam 133, a steel plate 135 is also embedded on each of the two ends of the middle beam 133, and a stud is welded on the inner side face of the steel plate 135.

[0076] The prefabrication of the segments of the opening segments 14 includes prefabricating the segments of the edge segments 14a at the two side edges of the opening and prefabricating the segments of the detachable segments 14b clamped between the two edge segments 14a. Each of the prefabrication of the segments of the edge segments 14a and the prefabrication of the segments of the detachable segments 14b includes prefabricating one U-shaped general segment 131, one straight-shaped general segment 132 and one middle beam 133, which are the same as the prefabricated segments of the main segments 13. In addition,

[0077] The prefabrication of each detachable pipe section 14b also includes prefabricating a detachable pipe piece 141, a U-shaped pipe piece A 142 or a U-shaped pipe piece B 144, a straight pipe piece A 143 combined with the U-shaped pipe piece A 142 or a straight pipe piece B 145 combined with the U-shaped pipe piece B 144; the detachable pipe piece 141 is made of cast iron structure, the prefabricated U-shaped pipe piece A 142, the U-shaped pipe piece B 144 and the U-shaped general pipe piece 131 are only different in the height of the two ends of the U-shaped structure, and the prefabrication ensures that the height of one end of the U-shaped pipe piece A 142 is the same as that of one end of the U-shaped general pipe piece 131, the height of the other end of the U-shaped pipe piece A 142 is the same as that of one end of the U-shaped pipe piece B 144, and the height of the other end of the U-shaped pipe piece B 144 is the same as that of the other end of the U-shaped general pipe piece 131. The straight pipe piece A 143, the straight pipe piece B 145 and the straight general pipe piece 132 are also only different in length, and the prefabrication ensures that the distance from the embedded steel plate 135 on the straight pipe piece A 143 to one end thereof is the same as the distance from the embedded steel plate 135 on the straight pipe piece B 145 to one end thereof, the distance from the embedded steel plate 135 on the straight pipe piece A 143 to the other end thereof is the same as the distance from the embedded steel plate 135 on the straight general pipe piece 132 to one end thereof, and the distance from the embedded steel plate 135 on the straight pipe piece B 145 to the other end thereof is the same as the distance from the embedded steel plate 135 on the straight general pipe piece 132 to the other end thereof.

[0078] The prefabrication of each edge pipe section 14a also includes prefabricating a steel vertical beam 146 and a U-shaped pipe piece A 142 or a U-shaped pipe piece B 144 which is prefabricated in the same way as the pipe piece of the detachable pipe section 14b, and a straight pipe piece A 143 combined with the U-shaped pipe piece A 142 or a straight pipe piece B 145 combined with the U-shaped pipe piece B 144.

[0079] S22. Pipe section assembly of the No. 1 station tunnel during construction: including the assembly of corresponding pipe pieces to form the main pipe section 13, the edge pipe section 14a or the detachable pipe section 14b, and including the assembly and connection between adjacent two pipe sections.

[0080] The pipe section assembly of the main pipe section 13 of the No. 1 station tunnel 1 is to make the two embedded steel plates 135 at the two ends of the middle beam 133 respectively abut and be welded and fixed with the steel plates 135 on the two straight general pipe pieces 132, forming a H-shaped body with different heights at the two ends, then making the four end portions of the H-shaped body abut the two ends of the two U-shaped general pipe pieces 131 correspondingly, and then fastening the steel members 134 abutting each other by bolts, to form a rectangular structure of the main pipe section 13 with the internal connection of the middle beam 133. When the adjacent two main pipe sections 13 are assembled and connected, staggered joint assembly is adopted, so that the adjacent joints of the adjacent two pipe sections are not on the same horizontal plane.

[0081] Each detachable pipe section 14b is assembled as a whole with reference to the main pipe section 13, only one U-shaped general pipe piece 131 of the main pipe section 13 is replaced by the U-shaped pipe piece A 142 or the U-shaped pipe piece B 144, and then according to whether the U-shaped pipe piece A 142 or the U-shaped pipe piece B 144 is used, when the U-shaped pipe piece A 142 is used, one straight general pipe piece 132 is replaced by the detachable pipe piece 141 connected to the straight pipe piece A 143, and finally assembled to form the A pipe section, and when the U-shaped pipe piece B 144 is used, one straight general pipe piece 132 is replaced by the detachable pipe piece 141 connected to the straight pipe piece B 145, and finally assembled to form the B pipe section. When assembling adjacent two detachable pipe sections 14b, the A pipe section and the B pipe section are alternately arranged, and the detachable pipe piece 141 is ensured to be in the same height state.

[0082] When the edge pipe section 14a is assembled, the detachable pipe piece 141 thereof is replaced by the steel vertical beam 146, the edge pipe section 14a is used to connect the main pipe section 13 and the detachable pipe section 14b, and the edge pipe sections 14a on both sides of the same hole can be the same A edge pipe section 14a or B edge pipe section 14a, or one side uses the A edge pipe section 14a and the other side uses the B edge pipe section 14a. The selection of the edge pipe section 14a is that when the adjacent detachable pipe section 14b is the A pipe section, the edge pipe section 14a uses the B edge pipe section 14a, and when the adjacent detachable pipe section 14b is the B pipe section, the edge pipe section 14a uses the A edge pipe section 14a.

[0083] It should be noted that the structure of the above-mentioned hole pipe section in the present application is a general description of the hole pipe section used for connecting the entrance and exit passages by opening holes on the side on the upper platform layer of the No. 1 station tunnel and the hole pipe section used for connecting the connecting passages by opening holes on the side on the lower platform layer. The structures of the hole pipe sections used for connecting the entrance and exit passages by opening holes on the side on the upper platform layer of the No. 1 station tunnel and the hole pipe sections used for connecting the connecting passages by opening holes on the side on the lower platform layer are basically the same, only the size of the hole opening area is different, which results in the difference between the hole opening areas of the two hole pipe sections only in the height of one end of one non-universal U-shaped pipe piece, the length of one non-universal straight pipe piece and the length of the detachable pipe piece.

[0084] In the step S2 of the present embodiment, the shield machine or the pipe jacking machine used for vertically combining to complete the main construction of the No. 1 station tunnel and the shield machine or the pipe jacking machine used for the main construction of the No. 2 station tunnel are both mother-son machine structures, the inner part of the rectangular shield machine or pipe jacking machine of the mother machine contains an eccentric circular shield son machine, and the son machine deviates from the lower part of the station in the mother machine, so as to coordinate the position relationship between the interval tunnel and the station platform.

[0085] The interval tunnel construction comprises the following steps:

[0086] S I. The main construction of the first interval tunnel: after the main construction of the first station tunnel 1 is completed, the combined connection relationship between the lower sub-machine and the main machine of the first tunneling equipment is released, the sub-machine is separated from the main machine, and then the independent main line tunneling construction is continuously carried out until the construction of the first interval tunnel 10a is completed.

[0087] S II. The main construction of the second interval tunnel: after the main construction of the second station tunnel 2 is completed, the combined connection relationship between the lower sub-machine and the main machine of the second tunneling equipment is released, the sub-machine is separated from the main machine, and then the independent main line tunneling construction is continuously carried out until the construction of the second interval tunnel 10b is completed.

[0088] The present application can effectively meet the station function, realize the goals of less demolition, less excavation, less pipeline relocation, less disturbance to the people, and good economy by using two shield machines or pipe jacking machines to vertically combine and excavate, completing the main construction of the first station tunnel, then using one shield or pipe jacking machine to push, completing the main construction of the second station tunnel, and then building several connecting passages between the first station tunnel and the second station tunnel by the underground excavation method, so that the first station tunnel and the second station tunnel form an L-shaped cross-section combined structure. The combined subway station constructed by the method of the present application can effectively meet the station function, realize the goals of less demolition, less excavation, less pipeline relocation, less disturbance to the people, and good economy. The present application can be applied to complex central urban areas, especially for subway station construction under the condition of limited ground excavation, and has strong implementability, small risk, and high construction efficiency, which creates a new idea for the construction of subway stations under complex environmental conditions in central urban areas. In addition, by using the eccentric combined circular shield tunneling machine in the rectangular cross-section shield or pipe jacking machine to continue to build the interval tunnel after the station excavation and construction is completed, the integrated construction of the station (including the station hall layer and the station platform layer) and the interval tunnel is realized, the comprehensive construction efficiency is improved, and the comprehensive goal of reducing ground excavation construction is achieved.

[0089] The present application is not limited to the above specific embodiments, and various modifications made by those skilled in the art without creative labor, based on the above concept, all fall within the scope of the present application.

Claims

1. A method for integrating the construction of a station and a tunnel section, characterized in that, This includes the construction of the station tunnel; the station tunnel construction includes the following steps: S1. Construction of the end well: Complete the necessary construction of the end well; S2. Main construction of Station Tunnel No. 1 and No. 2: After the end shaft is completed and ready for launching, the tunneling equipment will be installed. First, two rectangular shield tunneling machines or pipe jacking machines will be used for vertical combined tunneling to complete the main construction of Station Tunnel No.

1. After the main construction of Station Tunnel No. 1 is completed, a rectangular shield tunneling machine or pipe jacking machine will be used for jacking to complete the main construction of Station Tunnel No.

2. At the same time, it will be ensured that the parts of the main body of Station Tunnel No. 1 and Station Tunnel No. 2 that need to be connected by connecting passages, as well as the parts of the main body of Station Tunnel No. 1 that need to be connected to the entrance and exit passages, are all equipped with portal pipe sections with lateral reserved openings. Other parts are equipped with conventional main pipe sections. S3. Construction of connecting tunnels between stations 1 and 2: Several connecting passages will be constructed between station 1 tunnel and station 2 tunnel using the cut-and-cover method, so that station 1 tunnel and station 2 tunnel form an L-shaped cross-section combination structure, realizing the mutual connection between the two station tunnels. S4. On-site construction: construction of prefabricated secondary structures, construction of inter-story columns, intermediate beams, and intermediate structure of the middle and bottom slabs of the end wells; S5. Equipment Area Arrangement: An equipment area shall be arranged inside the tunnel of Station No. 1, and the corresponding equipment shall be installed; S6. Construction ventilation shaft: Based on the ground conditions, select the location for constructing the ventilation shaft and construct it using open-cut or vertical excavation methods. S7. Entrance and Exit Construction: Based on specific geological and environmental conditions, entrances and exits will be constructed using the pipe jacking method or the open-cut method, and connected to the No. 1 station tunnel through the entrance and exit passages to form a complete station; It also includes the construction of the section tunnels: after the main construction of the tunnels of stations S2 and S2 is completed, the tunnels of the corresponding sections are then excavated by tunnel boring machines or pipe jacking machines.

2. The method for integrated construction of a station and tunnel section according to claim 1, characterized in that, In the main construction of the tunnels of Station 1 and Station 2 in step S2, the shield machine or pipe jacking machine used for the vertical assembly to complete the main construction of the tunnel of Station 1 and the shield machine or pipe jacking machine used for the main construction of Station 2 are both mother-daughter machine structures. The mother machine, a rectangular shield machine or pipe jacking machine, contains an eccentric circular shield machine, and both of the machines are offset towards the lower part of the station.

3. The method for integrated construction of a station and tunnel section according to claim 2, characterized in that, The construction of the tunnel section includes the following steps: SⅠ. Construction of Section 1 Tunnel: After the main construction of Section 1 Tunnel is completed, the connection between the submachine and the mother machine at the bottom of the tunneling equipment for the main construction of Section 1 Tunnel will be disconnected. After the submachine is separated from the mother machine, it will continue to carry out independent main line tunnel excavation construction until the construction of Section 1 Tunnel is completed. Construction of Section 2 Tunnel: After the main construction of Section 2 Tunnel is completed, the connection between the tunnel boring machine or pipe jacking machine and the main machine at the bottom of the tunnel boring machine or pipe jacking machine during the main construction of Section 2 Tunnel will be disconnected. After the tunnel boring machine is separated from the main machine, it will continue to carry out independent main line tunnel excavation construction until the construction of Section 2 Tunnel is completed.

4. The method for integrated construction of a station and tunnel section according to claim 1, characterized in that, The main construction of the No. 1 and No. 2 station tunnels in step S2 also includes the prefabrication of the tunnel segments of the No. 1 and No. 2 station tunnels before construction, and the assembly of the tunnel segments to form the corresponding rectangular cross-section tunnel segments during construction. The tunnel segment prefabrication step includes the prefabrication of the main tunnel segments and the tunnel portal segments of the No. 1 and No. 2 station tunnels. The tunnel segment assembly step includes the assembly of the main tunnel segments and the tunnel portal segments of the No. 1 and No. 2 station tunnels.

5. The method for integrated construction of stations and tunnel sections according to claim 4, characterized in that, The prefabrication of the main tunnel segments of Station No. 1 includes prefabricating two identical U-shaped universal segments, two identical straight universal segments, and a central beam that constitute each main tunnel segment. When prefabricating the U-shaped universal segments, the two ends of the U-shaped universal segments are ensured to have different heights, and steel components are pre-embedded on both ends of the U-shaped universal segments. Tie bars are welded to the inner sides of the steel components and connected to the internal main reinforcement of the U-shaped universal segments. When prefabricating the straight universal segments, steel components are also pre-embedded on both ends of the straight universal segments. Tie bars are also welded to the inner sides of the steel components and connected to the internal main reinforcement of the straight universal segments. Furthermore, when prefabricating the straight universal segments, steel plates are pre-embedded at designated locations on one side of the straight universal segments, and studs are welded to the inner sides of the steel plates. When prefabricating the central beam, steel plates are also pre-embedded at both ends of the central beam, and studs are welded to the inner sides of the steel plates.

6. The method for integrated construction of stations and tunnel sections according to claim 5, characterized in that, When assembling the main pipe sections of the No. 1 station tunnel, the joints of the U-shaped universal pipe segments and the straight universal pipe segments of two adjacent main pipe sections are staggered.

7. The method for integrated construction of stations and tunnel sections according to claim 5, characterized in that, The main tunnel segment assembly method of the No. 1 station tunnel includes abutting and welding the steel plates pre-embedded at both ends of the central beam to the steel plates on two I-shaped universal segments to form an H-shaped body with different heights at both ends. Then, the four ends of the H-shaped body are used to abut the ends of two U-shaped universal segments. Finally, the abutting steel components are fastened with bolts to form a rectangular structure with the central beam connected internally as the main tunnel segment. The prefabrication of the tunnel segment at the entrance of the No. 1 station tunnel includes the prefabrication of the edge segments located on both sides of the entrance and the prefabrication of the detachable segments sandwiched between the two edge segments.

8. The method for integrated construction of stations and tunnel sections according to claim 7, characterized in that, Each of the prefabricated segments of the removable tube section includes a prefabricated removable segment, a U-shaped segment A or a U-shaped segment B, and a straight segment A or a straight segment B combined with the U-shaped segment A.

9. The method for integrated construction of stations and tunnel sections according to claim 8, characterized in that, Each of the precast segments of the edge tube section also includes a precast steel vertical beam and a U-shaped segment A or U-shaped segment B that is precast in the same way as the segments of the detachable tube section, as well as a straight segment A or a straight segment B that is combined with the U-shaped segment A.

10. The method for integrated construction of stations and tunnel sections according to claim 9, characterized in that, When two adjacent detachable pipe sections are assembled and connected, one is assembled using scheme A, which combines U-shaped pipe segment A and straight pipe segment A, to form pipe section A. The other is assembled using scheme B, which combines U-shaped pipe segment B and straight pipe segment B, to form pipe section B. Multiple detachable pipe sections are connected alternately using pipe sections A and B.

11. The method for integrated construction of stations and tunnel sections according to claim 10, characterized in that, When the edge pipe section is assembled with the detachable pipe section, if the adjacent detachable pipe section is pipe section A, the edge pipe section is assembled with pipe section A by using U-shaped pipe segment B and straight pipe segment B to form edge pipe section B, and vice versa.

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