Subway station structure

Abstract

The utility model discloses a metro station structure, which relates to the field of metro design and construction, and comprises an open excavation area of a metro station and an underground excavation area horizontally expanded at the bottom of the open excavation area. The problems that the construction risk is high, the construction period is long and the economic benefit is low due to the fact that an underground excavation method is adopted for construction under the condition that open excavation construction conditions are insufficient in an existing subway station are effectively solved, the influence on the surrounding environment in the construction process is reduced, and the utilization rate of underground space is increased.

Description

Technical Field

[0001] The utility model relates to the field of subway design and construction, in particular to a subway station structure. Background Art

[0002] The construction methods of subway stations include the open cut method and the cut-and-cover method. Under the condition of open cut construction, the open cut method with low construction difficulty, fast construction speed and high economic benefit is generally adopted for subway station construction. However, with the rapid development of cities, the construction environment around subway stations is becoming more and more complex, and the open cut construction conditions are becoming more and more insufficient. Under this premise, if all subway stations are constructed by the cut-and-cover method, there will be disadvantages such as high construction risk, long construction period and low economic benefit.

[0003] Therefore, how to provide a subway station structure suitable for the combination of open cut and cut-and-cover construction, and realize the rapid, low-risk and high-economic-benefit construction of subway stations under the condition of insufficient open cut construction conditions has become a difficult problem to be solved by those skilled in the art. Summary of the Invention

[0004] The purpose of the utility model is to provide a subway station structure to solve the problems of high construction risk, long construction period and low economic benefit caused by the cut-and-cover method in the case of insufficient open cut construction conditions for existing subway stations.

[0005] To solve the above technical problems, the utility model adopts the following technical solutions:

[0006] The utility model provides a subway station structure, which includes an open cut area and a cut-and-cover area communicated with the open cut area; the cut-and-cover area is located under a ground building; there is a hierarchically arranged open cut main body in the open cut area, and a cut-and-cover interface underpinning beam is arranged on the open cut main body with three underground floors, and the cut-and-cover section of the cut-and-cover area is rectangular.

[0007] Preferably, the opening of the cut-and-cover area is located at the position of the station track area inside the open cut area.

[0008] Preferably, the top of the cut-and-cover area is provided with horizontally arranged advanced small pipes, and the side walls of the cut-and-cover area are internally provided with obliquely arranged advanced small pipes.

[0009] Preferably, the length of the advanced small pipe is 5m.

[0010] Compared with the prior art, the beneficial technical effects of the utility model are:

[0011] The utility model horizontally expands an adit-excavated area at the bottom of an open-cut structure of a subway station. The above-mentioned subway station structure is suitable for construction by a combined open-cut and adit-excavation method, effectively solving the problems of high construction risk, long construction period and low economic benefit caused by adit-excavation construction under insufficient open-cut construction conditions of existing subway stations, reducing the impact on the surrounding environment during the construction process, and increasing the utilization rate of underground space. Brief Description of the Drawings

[0012] The present utility model will be further described below in conjunction with the drawings.

[0013] Figure 1 It is a schematic cross-section diagram at the joint of open-cut and adit-excavation of the present utility model Figure 1 ;

[0014] Figure 2 It is a schematic cross-section diagram at the joint of open-cut and adit-excavation of the present utility model Figure 2 ;

[0015] Figure 3 It is a schematic diagram of the construction area division by the alternate bay construction method of the present utility model;

[0016] Figure 4 It is a schematic diagram of the construction sequence of the bench cut method in a single bay passage of the present utility model.

[0017] Description of the reference numerals: 1. Open-cut area; 2. Adit-excavated area; 3. Single bay passage; 11. Open-cut main body; 12. Open-cut and adit-excavation interface supporting beam; 21. Adit-excavated cross-section; 22. Advanced small ducts; 23. Temporary columns; 31. Upper bench; 32. End section steel sealing end; 33. Middle bench; 34. Lower bench; 35. Cross bracing; 36. Core soil. Detailed Description of the Preferred Embodiments

[0018] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer, the present utility model will be further described in detail below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0019] As Figures 1-4 shown, the present utility model provides a subway station structure, including an open-cut area 1 and an adit-excavated area 2 communicating with the open-cut area 1; the adit-excavated area 2 is located below a ground building; the open-cut area 1 has a hierarchically arranged open-cut main body 11, and an open-cut and adit-excavation interface supporting beam 12 is arranged on the open-cut main body 11 with three underground floors, and the adit-excavated cross-section 21 of the adit-excavated area 2 is rectangular.

[0020] Specifically, the opening of the adit-excavated area is located at the position of the station track area within the open-cut area.

[0021] Specifically, the top of the mined - out area is provided with advanced small pipes 22 arranged horizontally, and the inside of the side wall of the mined - out area is provided with advanced small pipes 22 arranged obliquely.

[0022] Specifically, the length of the advanced small pipe 22 is 5m. Among them, the advanced small pipes 22 arranged horizontally are arranged in two rows.

[0023] The above - mentioned subway station structure is constructed by the following construction method:

[0024] Step 1: Complete the construction of the open - cut structure of the subway station according to the open - cut construction technology of the subway.

[0025] Specifically, Step 1 includes the following sub - steps:

[0026] Step 1.1: Construct the open - cut foundation pit.

[0027] Step 1.2: Construct the station floor slab at the bottom of the open - cut foundation pit.

[0028] Step 1.3: Erect temporary columns 23 on the station floor slab.

[0029] Step 1.4: Construct the interface support beam 12 for the open - cut and mined - out sections on the temporary columns 23.

[0030] Step 1.5: Construct the side walls and each floor slab in the open - cut foundation pit.

[0031] Step 1.6: Construct the mined - out retaining piles inside the open - cut foundation pit.

[0032] Among them, each floor slab constructed in Step 1.5 is the middle slab in the open - cut main structure.

[0033] Step 2: Horizontally expand the mined - out area at the bottom of the open - cut structure by the skip - jack method to complete the construction of the mined - out structure of the subway station.

[0034] Specifically, Step 2 includes the following sub - steps:

[0035] Step 2.1: After the open - cut structure reaches the design strength, construct the advanced support for the cross - head at the position of the station track area inside the open - cut structure.

[0036] Step 2.2: Use the skip - jack method to break through the cross - head, and use the bench method to excavate the upper bench 31 of the mined - out tunnel in the single - chamber passage 3 opened by the skip - jack method until reaching the end - section steel sealing end 32. Specifically, the bench method includes:

[0037] Step 2.21: Erect steel frames.

[0038] Step 2.22: Install locking feet.

[0039] Step 2.23: Erect a cross brace 35 at the top of the passageways of the upper step 31, middle step 33, and lower step 34.

[0040] Step 2.24: Excavate the passageways of the upper step 31, middle step 33, and lower step 34 to the end section steel sealing end 32.

[0041] When specifically excavating the lower step 34 of the single - chamber passageway, in addition to erecting a cross brace 35 at the top of the passageway of the lower step 34, an initial lining bottom slab is also provided at the bottom of the lower step 34.

[0042] Step 2.3: Use the bench method to separately excavate the middle step 33 and lower step 34 of the mined - out passageway within the single - chamber passageway, excavating to the end section steel sealing end 32, so that the upper step section, middle step section, and lower step section of the mined - out passageway are closed in a loop.

[0043] Step 2.4: After the mined - out structure excavated by the skip - jack method and bench method reaches the design strength, repeat Step 2.1 to Step 2.3 to horizontally expand the unexcavated part of the mined - out area.

[0044] Specifically, when using the bench method to excavate the mined - out passageway, a core soil 36 is reserved in front of the middle wall of the construction cross - passage.

[0045] Specifically, when using the skip - jack method to mine the single - chamber passageway, 25# I - shaped steel is used to support the single - chamber passageway.

[0046] Taking a subway station constructed in a one - loop line as an example:

[0047] The total length of this station is 217 m, the width is 25.3 m, and the bottom slab is deeply buried at 27.2 m. The station is laid out in the north - south direction. On the west side of the station is the city wall site (cultural relic), and on the east side is the above - ground parking lot of the property unit. It is impossible to construct the whole station by the open - cut method. After completing the construction of the open - cut structure of the subway station by the open - cut method, the mined - out area is horizontally expanded by the skip - jack method at the bottom of the open - cut structure. Among them, the mined - out section is a flat - top straight - wall, with a net width of 3.3 m, a height of 10 m, and a length of 50 m. When using the skip - jack method for construction, the width of each excavated section is 3.7 m, and the construction is carried out at intervals.

[0048] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "including", "comprising" or any other variant thereof is intended to cover non - exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0049] The embodiments described above are only descriptions of the preferred embodiments of the present invention, not limitations on the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A subway station structure, characterized in that: The invention comprises an open cut area (1) and a dark cut area (2) connected to the open cut area (1); the dark cut area (2) is located below a ground building; the open cut area (1) has a layered open cut body (11), and an open-dark cut interface underpinning beam (12) is arranged on the open cut body (11) of the third underground floor; the dark cut section (21) of the dark cut area (2) is rectangular.

2. The subway station structure according to claim 1, characterized in that: The opening of the dark excavation area is located in the station track area within the open excavation area.

3. The subway station structure according to claim 1, characterized in that: The top of the dark excavation area is provided with a transversely arranged small leading conduit (22), and the inside of the side wall of the dark excavation area is provided with an obliquely arranged small leading conduit (22).

4. The subway station structure according to claim 3, characterized in that: The length of the leading small conduit (22) is 5m.

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