Open cut subway station local horizontal extension structure
By setting up a concealed excavation expansion area on the side of the open excavation area of the open excavation subway station, and using temporary concrete walls, columns and steel concrete joists for structural stress conversion, the problem of great impact on the surrounding environment during construction of the subway station is solved, and more efficient construction and resource utilization is achieved.
Patent Information
- Application Number
- CN202422120902.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-08-30
AI Technical Summary
In the prior art, the open excavation method during construction of subway stations cannot reduce the impact of the surrounding environment, and the hidden excavation method has problems such as high construction risks, long cycles, and high cost.
A local horizontal expansion structure of open excavation subway station is adopted, including an open excavation area and a hidden excavation expansion area located on the side of the open excavation area. By setting up temporary concrete walls, temporary columns and first-type steel concrete joists on the side of the open excavation area, the structural stress conversion during subsequent horizontal expansion is achieved.
Effectively reduce the impact of the surrounding environment, improve construction efficiency, speed up construction progress, and better make use of limited underground space.
Smart Images
Figure CN223034058U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of construction engineering, and more specifically to a local horizontal expansion structure of an open-cut subway station. Background Art
[0002] In the prior art, subway stations are constructed by open-cut method or mined method. However, with the rapid development of cities, the surrounding environment of subway station construction has become increasingly complex. For complex construction environments, it is impossible to implement the open-cut method entirely. And if the mined method is adopted, there are disadvantages such as high construction risks, long construction periods, and high costs.
[0003] Therefore, how to provide a local horizontal expansion structure of an open-cut subway station that can reduce the impact on the surrounding environment and improve construction efficiency is one of the technical problems that need to be urgently solved in this field. Summary of the Utility Model
[0004] In view of this, the utility model provides a local horizontal expansion structure of an open-cut subway station, and the purpose is to solve the problems in the prior art.
[0005] To solve the above technical problems, the utility model adopts the following technical solutions:
[0006] A local horizontal expansion structure of an open-cut subway station includes: an open-cut area and a mined expansion area located on one side of the open-cut area; the open-cut area is provided with an open-cut main structure; at the interface between the open-cut area and the mined expansion area, there are a temporary concrete wall and temporary columns; at the top of the temporary concrete wall, there is a first steel-concrete combined beam; the first steel-concrete combined beam is connected to the open-cut main structure in the open-cut area.
[0007] Preferably, a longitudinal beam under the wall is provided at the top of the first steel-concrete combined beam.
[0008] Preferably, a transverse roof beam is provided at the top of the longitudinal beam under the wall.
[0009] Preferably, the first steel-concrete combined beam is connected to the open-cut main structure through a second steel-concrete combined beam.
[0010] The utility model has achieved the following technical effects compared with the prior art: by setting a mined expansion area on one side of the open-cut area, the utility model can carry out local horizontal mined expansion construction after open-cut construction at a position with less impact on the surrounding environment, thereby effectively reducing the impact on the surrounding environment, making better use of the limited underground space, and accelerating the construction progress. Brief Description of the Drawings
[0011] Figure 1 It is an end view of a local horizontal expansion structure of an open-cut subway station of the utility model;
[0012] Figure 2 It is a schematic diagram of longitudinal excavation during the expansion construction of the mined - out area;
[0013] Figure 3 It is a construction sequence diagram of longitudinal excavation during the expansion construction of the mined - out area;
[0014] Figure 4 - Figure 6 It is a construction sequence diagram of the secondary lining;
[0015] In the figure: 1. Open - cut main structure; 2. Temporary concrete wall; 3. First steel - reinforced concrete corbel; 4. Longitudinal beam under the wall; 5. Second steel - reinforced concrete corbel; 6. Transverse beam on the top plate; 7. Upper bench; 8. Steel frame; 9. Temporary cross - brace; 10. Middle bench; 11. Lower bench. Specific embodiments
[0016] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.
[0017] The present utility model provides a local horizontal expansion structure for an open - cut subway station, including: an open - cut area and a mined - out expansion area located on one side of the open - cut area; the open - cut area is provided with an open - cut main structure 1; at the interface between the open - cut area and the mined - out expansion area, there are a temporary concrete wall 2 and temporary columns; at the top of the temporary concrete wall 2, there is a first steel - reinforced concrete corbel 3; the first steel - reinforced concrete corbel 3 is connected to the open - cut main structure 1 in the open - cut area; by setting a temporary concrete wall 2, temporary columns and a first steel - reinforced concrete corbel 3 at the interface between the open - cut area and the mined - out expansion area, the structural force conversion during subsequent horizontal expansion can be realized.
[0018] In this embodiment, at the top of the first steel - reinforced concrete corbel 3, there is a longitudinal beam 4 under the wall.
[0019] In this embodiment, at the top of the longitudinal beam 4 under the wall, there is a transverse beam 6 on the top plate.
[0020] In this embodiment, the first steel - reinforced concrete corbel 3 is connected to the open - cut main structure 1 through a second steel - reinforced concrete corbel 5.
[0021] In this embodiment, the mined - out expansion area is provided with a temporary cross - brace 9 and a steel frame 8 for temporarily supporting the mined - out expansion area.
[0022] The utility model discloses a construction method for a local horizontal expansion structure of an open-cut subway station, comprising the following steps:
[0023] S1: Complete the construction of the open-cut main structure 1 of the station according to the open-cut construction process of the station;
[0024] S2: During the construction of the open-cut main structure 1, temporary columns, temporary concrete walls 2 and the first steel-concrete joist 3 are set at the interface between the preset dark-cut expansion area and the open-cut main structure 1 to achieve structural force conversion during horizontal expansion;
[0025] S3: When the open-cut main structure 1 of the station reaches the design strength and the advanced reinforcement measures are completed, the door openings are removed at both ends of the dark excavation expansion area, excavation is carried out in opposite directions and a certain length of one-way penetration is reserved in the middle to complete the construction of the dark excavation expansion area;
[0026] S4: Carry out secondary lining construction in the dark excavation expansion area.
[0027] In this embodiment, the specific construction method of S2 is: construct open excavation foundation pit - construct station floor - construct temporary columns and temporary concrete wall 2 - construct open and dark excavation interface support beam - construct side walls and each floor slab - remove the retaining piles at the open and dark excavation interface.
[0028] In this embodiment, the open-cut interface replacement beam includes a first steel concrete support beam 3 and a second steel concrete support beam 5; the first steel concrete support beam 3 is arranged at the top of the temporary concrete wall 2; the first steel concrete support beam 3 is connected to the open-cut main structure 1 through the second steel concrete detachment.
[0029] In this embodiment, the specific construction method of S3 is: excavating the upper step 7 at the horse head gate (reserving core soil for circular excavation) - erecting a steel frame 8 - setting up locking feet - erecting temporary cross braces 9 - longitudinally excavating from one end of the dark excavation expansion area to a certain distance, and temporarily closing the heading face - excavating the middle step 10 according to the excavation sequence of the upper step 7 - excavating to the end and sealing the end - then excavating the lower step 11 until the entire section is closed into a ring, and the remaining area to be expanded is excavated from the other end of the dark excavation expansion area until it is connected.
[0030] In this embodiment, in S4, the secondary lining construction includes the following steps: S41, cutting off the lower temporary concrete wall 2 and the steel frame 8, and constructing the bottom plate; S42, gradually removing the temporary cross braces 9, and constructing the inner wall and top plate of the passage to form a whole; S43, removing the temporary columns and the temporary concrete wall 2.
[0031] In this embodiment, the dark excavation section is a flat-top straight wall with a net width of 3.3m, a height of 10m, and a length of 50m, and a longitudinal excavation method is adopted.
[0032] The utility model can reduce the impact on the surrounding environment, increase the utilization rate of underground space, and create a new local horizontal expansion longitudinal excavation construction method for subsequent new construction projects and renovation and expansion projects with increased usage functions.
[0033] The above are only the preferred embodiments of the utility model, and do not limit the technical scope of the utility model. Therefore, any minor modifications, equivalent changes and decorations made to the above embodiments based on the technical essence of the utility model still fall within the scope of the technical solution of the utility model.
Claims
1. A partial horizontal expansion structure of an open-cut subway station, characterized in that: include: An open cut area and a dark cut extension area located on one side of the open cut area; the open cut area is provided with an open cut main structure (1); a temporary concrete wall (2) and temporary columns are provided at the interface between the open cut area and the dark cut extension area; a first steel concrete joist (3) is provided at the top of the temporary concrete wall (2); the first steel concrete joist (3) is connected to the open cut main structure (1) of the open cut area.
2. The open-cut subway station partial horizontal expansion structure according to claim 1, characterized in that: A wall longitudinal beam (4) is provided at the top end of the first steel-concrete supporting beam (3).
3. The open-cut subway station partial horizontal expansion structure according to claim 2, characterized in that: A top plate transverse beam (6) is provided at the top end of the longitudinal beam (4) under the wall.
4. The open-cut subway station partial horizontal expansion structure according to claim 1, characterized in that: The first steel concrete support beam (3) is connected to the open cut main structure (1) via a second steel concrete support beam (5).