A construction method for combining subway transfer passage and subway section

Abstract

This application relates to the technical field of subway construction and provides a construction method for the combined construction of a subway transfer passage and a subway section, including: pre-constructing open-cut stations at both ends, reserving conditions for a concealed excavation transfer between the open-cut stations; constructing reinforced concrete walls on the exterior of the main structure to form the main framework of the subway transfer passage and the subway section; after the exterior structure of the passage is completed, constructing the interior reinforced concrete walls; after the strength of the interior reinforced concrete walls and platform slabs reaches the design strength requirements, track laying operations are carried out within the subway section, and pipeline installation and decoration are carried out within the transfer passage. This optimizes passenger flow organization at the transfer station, effectively reduces early issues such as traffic diversion and pipeline relocation above the transfer passage, reduces the amount of civil engineering work and construction work area, enhances project feasibility, saves construction costs, and solves the problem of transfer passages not meeting open-cut construction conditions and unable to achieve platform-to-platform transfers.

Description

Technical Field

[0001] The present invention relates to the technical field of subway construction, and in particular to a construction method for jointly constructing a subway transfer passage and a subway section. Background Art

[0002] The transfer design of urban underground rail transit intersection lines generally considers connecting stations of different lines through transfer nodes. In the central urban area, transfer channels are often restricted by ground transportation and underground pipeline conditions, and often do not have the conditions for open-cut construction.

[0003] Existing subway stations usually use the open-cut method to implement platform transfer nodes, but there are often early problems in the implementation of nodes located under intersections, and the construction is difficult and the construction period is long, which urgently needs improvement.

[0004] After searching, announcement number CN109854253B discloses a method for expanding an existing subway underground-excavated island transfer station. The expansion is carried out by building a new external open-cut platform structure on one side of the existing transfer station. The new external open-cut structure is connected to the existing transfer station through an underground connecting passage constructed from the side of the open-cut structure. By optimizing the transfer flow line, the transfer passenger flow in the existing island station is reduced to 1 / 2 of the original, thereby doubling the transfer capacity of the existing station. The new platform structure is constructed by the open-cut method, which is mature and reliable technology, reduces construction risks, and reduces project costs. The new connecting passage is constructed by the underground excavation method, which reduces the project area and avoids affecting road traffic.

[0005] The existing technology has the problem that the transfer channel does not have the conditions for open excavation and platform-to-platform transfer cannot be realized, which urgently needs to be improved. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the present invention provides a construction method for jointly constructing a subway transfer channel and a subway section, which solves the problem that the transfer channel does not have the conditions for open excavation and cannot realize platform-to-platform transfer.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: A construction method for a subway transfer passage and a subway section in combination, comprising the following steps:

[0008] Step 1: Construct open-cut stations at both ends in advance, and reserve the conditions for underground transfer between the open-cut stations;

[0009] Step 2: Determine the structural cross-sectional dimensions of the subway transfer passage and subway section, construct the outer reinforced concrete walls of the main structure, and form the main framework of the subway transfer passage and subway section;

[0010] Step 3: After the external structure of the tunnel is completed, the internal reinforced concrete walls are constructed to completely separate the subway transfer tunnel from the subway section. The platform slabs are also constructed to connect with the open-cut station platforms and transfer nodes at both ends.

[0011] Step 4: After the strength of the internal reinforced concrete walls and platform slabs reaches the strength requirements specified in the design, the formwork and scaffolding will be removed, track laying operations will be carried out within the subway section, pipelines will be installed inside the transfer passage, and the ground, walls, and ceiling of the subway transfer passage will be decorated.

[0012] Preferably, the subway transfer passage and the subway section are constructed jointly in an underground structure.

[0013] Preferably, after the strength of the internal reinforced concrete walls and platform slabs reaches the strength requirements specified in the design, platform-to-platform transfers between different lines can be realized, and the subway transfer passages and subway sections can be completely separated.

[0014] Preferably, the partition wall between the subway transfer passage and the subway section is a reinforced concrete wall that can withstand the piston wind pressure in the subway section.

[0015] The present invention provides a construction method for the combined construction of a subway transfer passage and a subway section. It has the following beneficial effects:

[0016] The present invention constructs open-cut stations at both ends in advance, reserves conditions for dark-cut transfer between the open-cut stations, determines the structural cross-sectional dimensions of the subway transfer passage and the subway section, constructs the outer reinforced concrete walls of the main structure, forms the main frame of the subway transfer passage and the subway section, completes the construction of the outer structure of the passage, constructs the inner reinforced concrete walls, and after the strength of the reinforced concrete of the internal structure reaches the strength requirements specified in the design, removes the formwork and scaffolding, and carries out operations such as track laying in the subway section, installs pipelines inside the transfer passage, and decorates the ground, walls, and ceiling of the subway transfer passage, thereby solving the problem that the transfer passage does not have the conditions for open-cut implementation and cannot realize platform-to-platform transfer, optimizes the passenger flow organization of the transfer station, and can effectively reduce the early problems such as traffic diversion and pipeline relocation above the transfer passage, reduces the amount of civil engineering and the construction work surface, enhances the feasibility of the project, and saves the construction cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the planar layout of each functional area in the present invention;

[0018] Figure 2 It is a cross-sectional schematic diagram of the subway transfer passage and the main frame of the subway section in the present invention;

[0019] Figure 3 It is a cross-sectional schematic diagram of the internal structure of the present invention after completion of the construction;

[0020] Figure 4 This is a cross-sectional schematic diagram of the transfer passage and subway section after the joint construction is completed in the present invention;

[0021] Figure 5 It is a schematic diagram of the longitudinal section of the subway transfer passage in the present invention.

[0022] Among them, 1. The first left-line joint construction tunnel; 2. The second left-line joint construction tunnel; 3. The first open-cut platform of the transfer station; 4. The second open-cut station of the transfer station; 5. The left-line section tunnel; 6. The right-line section tunnel; 7. Reinforced concrete partition wall; 9. The section tunnel pipeline installation space; 10. The pipeline installation space under the platform slab; 11. The platform slab of the transfer channel; 12. The pipeline installation space of the transfer channel. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] The present invention provides a construction method for a subway transfer passage and a subway section, comprising the following steps:

[0025] Open-cut stations will be constructed at both ends in advance, and conditions for underground transfer between the open-cut stations will be reserved.

[0026] Determine the structural cross-sectional dimensions of the subway transfer passage and the subway section in combination, construct reinforced concrete walls on the outside of the main structure, and form the main framework of the subway transfer passage and the subway section; the subway transfer passage and the subway section are combined and arranged in an underground structure.

[0027] The external structure of the channel has been completed, and the internal reinforced concrete wall has been constructed to completely separate the subway transfer channel from the subway section. The platform slab has also been constructed to connect with the open-cut station platforms and transfer nodes at both ends. The separation wall between the subway transfer channel and the subway section is a reinforced concrete wall that can withstand the piston wind pressure of the subway section.

[0028] After the reinforced concrete strength of the internal structure reaches the strength requirements specified in the design, the formwork and scaffolding will be removed, and track laying and other operations will be carried out in the subway section; platform-to-platform transfers between different lines can be realized, and the subway transfer passages and subway sections can be completely separated.

[0029] After the reinforced concrete strength of the internal structure reaches the designed service strength, pipelines will be installed inside the transfer passage, and the floor, walls and ceiling of the subway transfer passage will be decorated.

[0030] The above method can solve the problem that the transfer channel does not have the conditions for open excavation and cannot realize platform-to-platform transfer, optimizes the passenger flow organization of the transfer station, and can effectively reduce the early problems such as traffic diversion and pipeline relocation above the transfer channel, reduce the amount of civil engineering and construction work surface, enhance the feasibility of the project, and save the construction cost.

[0031] Example:

[0032] Please see the attached Figure 1 -Attached Figure 5 The embodiment of the present invention provides a construction method for jointly constructing a subway transfer passage and a subway section, comprising the following steps:

[0033] Step 1: construct the open-cut platform 3 of the first transfer station and the open-cut station 4 of the second transfer station at both ends in advance, and reserve the conditions for underground transfer between the open-cut stations;

[0034] Step 2: Determine the structural cross-sectional dimensions of the subway transfer passage and subway section based on transfer passenger flow, pipeline installation space, and vehicle clearance, and construct the first left-line combined tunnel 1 and the second left-line combined tunnel 2 to form the main framework of the subway transfer passage and subway section.

[0035] Step 3: After the main frame is constructed, the transfer channel platform 11 and reinforced concrete partition wall 7 are constructed inside the channel. The transfer channel platform 11 connects to the public area of ​​the transfer station, and the reinforced concrete partition wall 7 completely separates the subway transfer channel from the subway section.

[0036] Step 4: After the strength of the internal reinforced concrete partition wall 7 and the transfer passage platform slab 11 reaches the design strength requirements, the formwork and scaffolding are removed, and the track laying of the left-line tunnel 5 and the right-line tunnel 6 is carried out within the subway section;

[0037] Step 5: After the strength of the internal structure reinforced concrete partition wall 7 and the transfer channel platform slab 11 reaches the strength requirements specified in the design, the mechanical and electrical and related pipelines and decoration are installed in the pipeline installation space 10 under the platform slab, the section tunnel pipeline installation space 9, and the transfer channel pipeline installation space 12.

[0038] After adopting the above method, the problem that the transfer channel does not have the conditions for open excavation implementation and cannot realize platform-to-platform transfer is solved, the passenger flow organization of the transfer station is optimized, and at the same time, it can effectively reduce the early problems such as traffic diversion and pipeline relocation above the transfer channel, reduce the amount of civil engineering and construction work surface, enhance the feasibility of the project, and save the construction cost.

[0039] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A construction method for a subway transfer passage and a subway section, characterized in that: The following steps are involved: Step 1: Construct open-cut stations at both ends in advance, and reserve the conditions for underground transfer between the open-cut stations; Step 2: Determine the structural cross-sectional dimensions of the subway transfer passage and subway section, construct the outer reinforced concrete walls of the main structure, and form the main framework of the subway transfer passage and subway section; Step 3: After the external structure of the tunnel is completed, the internal reinforced concrete walls are constructed to completely separate the subway transfer tunnel from the subway section. The platform slabs are also constructed to connect with the open-cut station platforms and transfer nodes at both ends. Step 4: After the strength of the internal reinforced concrete walls and platform slabs reaches the strength requirements specified in the design, the formwork and scaffolding will be removed, track laying operations will be carried out within the subway section, pipelines will be installed inside the transfer passage, and the ground, walls, and ceiling of the subway transfer passage will be decorated.

2. The construction method for the combined construction of a subway transfer passage and a subway section according to claim 1 is characterized by: The subway transfer passage and the subway section are jointly constructed in an underground structure.

3. The construction method for the combined construction of a subway transfer passage and a subway section according to claim 1 is characterized by: When the strength of the internal reinforced concrete walls and platform slabs reaches the strength requirements specified in the design, platform-to-platform transfers between different lines can be realized, and the subway transfer passages and subway sections can be completely separated.

4. The construction method for the combined construction of a subway transfer passage and a subway section according to claim 1 is characterized by: The partition wall between the subway transfer passage and the subway section is a reinforced concrete wall that can withstand the piston wind pressure in the subway section.

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