Combined group hole type station built through full-mechanical method and building method of combined group hole type station

Abstract

The invention discloses a combined group hole type station built through a full-mechanical method and a building method thereof. The station comprises rail-mounted areas located on the two sides, an island type pedestrian area is arranged between the rail-mounted areas, the island type pedestrian area is communicated with the rail-mounted areas through a platform connecting channel, a working vertical shaft is arranged outside the rail-mounted area on one side, and the working vertical shaft is communicated with the island type pedestrian area; the construction method comprises the following steps: open excavation and construction of the working shaft; the working vertical shaft serves as shield launching, and a rail-mounted area and an island-type pedestrian area are constructed; a platform connecting channel is constructed between the rail-mounted area and the island-type pedestrian area; performing function division on the working shaft; and construction of the whole station is completed. Only a small ground space needs to be occupied for construction of the working vertical shaft, the traffic pressure caused by subway construction on urban busy sections can be effectively relieved, and citizens can go out conveniently. The method is high in mechanization degree and small in influence on ground traffic, the construction efficiency can be greatly improved, the subway project construction period is shortened, and the project cost is reduced.

Description

Technical Field

[0001] The invention belongs to the field of urban underground facility construction, and in particular relates to a fully mechanically constructed combined tunnel-type station and a construction method thereof. Background Art

[0002] With the rapid development of urban economy and the increasing population mobility in today's society, the demand for urban rail transit construction, mainly represented by subways, is gradually expanding. In terms of the impact of subway construction on the surrounding environment, at present, subway construction is usually based on open excavation and covered excavation, and there is a certain degree of road occupation demand during construction. For busy areas in the city, subway construction is bound to cause the phenomenon of "construction siege" of subways, exacerbating the conflict between citizens' daily convenient travel needs and urban renewal development.

[0003] In order to minimize the impact of subway construction on citizens, subway design often uses zoning construction and multi-phase traffic diversion to divert people and vehicles, but this measure will inevitably cause waste of manpower, materials and other resources, and requires a more generous construction schedule. In terms of the development and utilization of underground space, due to the complex boundary conditions around the station, conventional standard station design is often unable to be effectively implemented. In order to meet the basic functions and regulatory requirements of station buildings, it is often necessary to split and reorganize various components of the station to form an atypical station design with high space utilization and complete basic functions.

[0004] The atypical station design has a considerable degree of breakthrough and novelty in terms of architecture and structural form, and is highly compatible with the surrounding complex environment, and has high research value. To solve the above problems, the current mainstream design principle is to set up a separated island platform to adapt to the surrounding complex boundary conditions, but engineers and scholars from various countries have not yet reached a relatively consistent consensus on the choice of station construction methods.

[0005] Therefore, exploring a construction method for combined tunnel-type subway stations based mainly on non-open-cut means to achieve "harmonious coexistence" of subway construction at the social level and efficient use of underground space has extremely important research significance and reference value. Summary of the invention

[0006] The present invention is proposed to solve the problems existing in the prior art, and its purpose is to provide a fully mechanical method for constructing a combined tunnel-type station and a construction method thereof.

[0007] The technical solution of the present invention is: a combined group tunnel type station built by a fully mechanical method, including track areas on both sides, an island pedestrian area is arranged between the track areas, the island pedestrian area is connected to the track area through a platform connecting channel, and a working shaft is arranged outside the track area on one side, and the working shaft is connected to the island pedestrian area.

[0008] Furthermore, the track area, the island pedestrian area, and the platform connecting passage are connected to form a platform layer, and there are one or more island pedestrian areas.

[0009] Furthermore, a subway line track is arranged in the track area, and a platform plate is formed on one side of the subway line track close to the island pedestrian area, and the platform plate is flush with the platform connecting passage.

[0010] Furthermore, the bottom of the platform connecting passage passes through the island-type pedestrian area, and a backfill area for supporting the bottom is provided in the island-type pedestrian area.

[0011] Furthermore, the island-type pedestrian area includes a pedestrian area shield segment, and the pedestrian area shield segment includes an arc area and a straight area.

[0012] Furthermore, the straight area of ​​the shield segment in the pedestrian area is connected to the platform connecting channel.

[0013] Furthermore, the arc area of ​​the pedestrian area shield segment is in the shape of a spatial arc and is connected to the working shaft.

[0014] Furthermore, the arc-shaped area of ​​the pedestrian area shield segment spatially avoids the track area shield segment of the side track area.

[0015] A fully mechanical method for constructing a combined tunnel-type station and a construction method thereof, comprising the following steps: A. Open excavation to construct the working shaft; B. Use the working shaft as the starting point of the shield machine to construct the track area and the island pedestrian area; C. Construct a platform connecting passage between the track area and the island pedestrian area; D. Functional division of the working shaft; E. Complete the construction of the entire station.

[0016] The beneficial effects of the present invention are as follows: The present invention is mainly based on non-open-cut means to build subway stations. Compared with the existing technology, it only needs to occupy a smaller area of ​​ground space to construct the working shaft, which can effectively alleviate the traffic pressure caused by subway construction on busy areas in the city and facilitate citizens' travel.

[0017] The working shaft of the present invention is used for hanging mechanical equipment in the early stage, and a central island pedestrian area and track areas on both sides are formed by excavating with shield machines of different diameters, so as to realize the orderly division of functional areas; the central island pedestrian area and the track areas on both sides are connected by platform connecting channels, so as to realize the organic combination of functional areas.

[0018] The present invention has a high degree of mechanization and has little impact on ground traffic. The platform and the track area are connected by several connecting channels, and parallel operation is highly feasible. While avoiding large-scale excavation of the road surface and reducing pipeline relocation, it can greatly improve construction efficiency, shorten the construction period of the subway project, and reduce the project cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the platform layer plane in the present invention; Figure 2 It is a schematic diagram of the station hall floor plan in the present invention; Figure 3 is a schematic cross-sectional view of the platform structure in the present invention; Figure 4 is a schematic cross-sectional view of a station structure in the present invention; Figure 5 It is a schematic diagram of the platform connection channel structure in the present invention; in: 1. Track area; 11. Shield segments for track area; 12. Air duct on top of track; 13. Platform slab; 14. Metro line track; 2. Island pedestrian area; 21. Shield segments for pedestrian area; 22. Backfill area; 3. Platform connecting passage; 31. Initial support; 32. Secondary lining; 311. Large pipe shed; 312. Sprayed concrete + steel support; 313. Small duct; 4. Working shaft; 41. Entrance and exit passage; 42. Fire pump room; 43. Environmental control room; 44. Platform payment area; 45. Air duct mezzanine; 46. Wind chamber; 47. Lighting and power distribution room. DETAILED DESCRIPTION

[0020] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and embodiments: like Figures 1 to 5 As shown, a combined group tunnel station constructed by a fully mechanical method includes track areas 1 located on both sides, an island pedestrian area 2 is arranged between the track areas 1, and the island pedestrian area 2 is connected to the track area 1 through a platform connecting channel 3. A working shaft 4 is arranged outside the track area 1 on one side, and the working shaft 4 is connected to the island pedestrian area 2.

[0021] The track area 1, the island pedestrian area 2, and the platform connecting passage 3 are connected to form a platform layer, and there are one or more island pedestrian areas 2.

[0022] A subway track 14 is arranged in the track area 1 , and a platform slab 13 is formed on one side of the subway track 14 close to the island pedestrian area 2 . The platform slab 13 is flush with the platform connecting passage 3 .

[0023] The bottom of the platform connecting passage 3 passes through the island-type pedestrian area 2 , and a backfill area 22 is provided in the island-type pedestrian area 2 to support the bottom thereof.

[0024] The island-type pedestrian area 2 includes a pedestrian area shield segment 21, and the pedestrian area shield segment 21 includes an arc area and a straight area.

[0025] The straight area of ​​the pedestrian area shield segment 21 is connected to the platform connecting channel 3.

[0026] The arc-shaped area of ​​the pedestrian shield segment 21 is in a spatial arc shape and is connected to the working shaft 4.

[0027] The arc-shaped area of ​​the pedestrian area shield segment 21 spatially avoids the track area shield segment 11 of the side track area 1.

[0028] Specifically, the track area 1 is located on both sides and is parallel. The track area 1 includes a track area shield segment 11. The track area shield segment 11 encloses a main space. The subway line track 14 is arranged at the bottom of the track area shield segment 11. The platform plate 13 is horizontal. A track top air duct 12 is arranged above the subway line track 14.

[0029] Specifically, the island pedestrian area 2 includes a pedestrian area shield segment 21, and a backfill area 22 is also provided in the straight area, and the backfill area 22 is opposite to the platform connection channel 3. In order to ensure that the platform layer structure has a consistent height, the over-excavation part of the platform connection channel 3 is backfilled.

[0030] As an implementation manner, the backfill area 22 may be, but is not limited to, backfilled with concrete.

[0031] Specifically, the platform connection passage 3 connects the island pedestrian area 2 and the rail area 1. The platform connection passage 3 is constructed by dark excavation. The platform connection passage 3 includes initial support 31 and secondary lining 32. The initial support 31 includes a large pipe shed 311 and shotcrete + steel support 312. Small guide tubes 313 are used between the large pipe sheds 311 for grouting reinforcement of the stratum.

[0032] Specifically, the fully mechanical combined tunnel station includes track areas 1 on both sides, a central island pedestrian area 2, and a working shaft 4. The functional divisions within the working shaft 4 include entrance and exit passages 41, a fire pump room 42, an environmental control room 43, a platform payment area 44, an air duct mezzanine 45, a wind chamber 46, and a lighting distribution room 47.

[0033] Specifically, the cross-section of the working shaft 4 is rectangular. The working shaft 4 includes an entrance and exit passage 41 and a fire pump room 42 on the top floor. An environmental control room 43 and a platform payment area 44 are arranged in the middle floor of the working shaft 4. The layers where the environmental control room 43 and the platform payment area 44 are located are connected to the pedestrian area shield segment 21. An air duct interlayer 45 and an air chamber 46 are arranged in the middle floor of the working shaft 4. A lighting distribution room 47 is arranged on the bottom floor of the working shaft 4.

[0034] Specifically, the fully mechanical method combines the station hall layer of the group-tunnel station, including the central island pedestrian area 2 and the working shaft 4. The shield machine is lowered into the working shaft 4, and then the shield machine starts from the working shaft 4, and after excavating through a small turning radius, it reaches the station hall layer and excavates in a straight line to form the central island pedestrian area 2.

[0035] Specifically, the track area shield segment 11 is made of reinforced concrete segment, and the reinforced concrete part is provided with glass fiber reinforcement for cutting after molding to form a connection port with the platform connection channel 3.

[0036] Specifically, the central island pedestrian area 2 is excavated by a large-diameter shield machine, and its structure includes reinforced concrete segments. The reinforced concrete part is provided with glass fiber reinforcement, which is arranged opposite to the cutting edge of the reinforced concrete segment of the track area 1 and is used for cutting after forming. Together with the cutting edge of the reinforced concrete segment of the track area 1, it constitutes the two ends of the platform connecting channel 3.

[0037] A fully mechanical method for constructing a combined tunnel-type station and a construction method thereof, comprising the following steps: A. Open excavation and construction of working shaft 4; B. Use working shaft 4 as the starting point for shield tunneling to construct track area 1 and island pedestrian area 2; C. Construct platform connecting passage 3 between track area 1 and island pedestrian area 2; D. Functionally partition the working shaft 4; E. Complete the construction of the entire station.

[0038] Specifically, step A is to open-cut and construct the working shaft 4, and the specific process is as follows: First, a working shaft 4 is constructed by open excavation; Then, the construction equipment is hoisted and lowered into the working shaft 4 .

[0039] Specifically, step B uses the working shaft 4 as the shield starting point to construct the track area 1 and the island pedestrian area 2. The specific process is as follows: First, shield equipment with different diameters was used to start from the working shaft 4; Then, the shield equipment is transferred to the platform level via a small radius; Afterwards, the shield equipment excavates to form a central island pedestrian area 2 and two side track areas 1; Finally, the shield equipment is transferred into the working shaft 4 via a small radius and is hoisted out after being disassembled.

[0040] Specifically, step C constructs the platform connecting passage 3 between the track area 1 and the island pedestrian area 2. The specific process is as follows: First, cut the special ring shield segments in the central island pedestrian area 2 and the track areas 1 on both sides; Then, the platform connecting passage 3 is constructed by dark excavation.

[0041] Specifically, step D performs functional partitioning on the working shaft 4, and the specific process is as follows: Carry out the functional divisions in the working shaft 4, integrate the functional divisions in the station, and realize the final connection.

[0042] The present invention is mainly based on non-open-cut means to build subway stations. Compared with the existing technology, it only needs to occupy a smaller area of ​​ground space to construct the working shaft, which can effectively alleviate the traffic pressure caused by subway construction on busy areas in the city and facilitate citizens' travel.

[0043] The working shaft of the present invention is used for hanging mechanical equipment in the early stage, and a central island pedestrian area and track areas on both sides are formed by excavating with shield machines of different diameters, so as to realize the orderly division of functional areas; the central island pedestrian area and the track areas on both sides are connected by platform connecting channels, so as to realize the organic combination of functional areas.

[0044] The present invention has a high degree of mechanization and has little impact on ground traffic. The platform and the track area are connected by several connecting channels, and parallel operation is highly feasible. While avoiding large-scale excavation of the road surface and reducing pipeline relocation, it can greatly improve construction efficiency, shorten the construction period of the subway project, and reduce the project cost.

Claims

1. A fully mechanical method for building a combined tunnel-type station, characterized in that: The invention comprises track areas (1) located on both sides, an island-type pedestrian area (2) is arranged between the track areas (1), the island-type pedestrian area (2) is connected to the track area (1) through a platform connecting passage (3), and a working shaft (4) is arranged outside the track area (1) on one side, and the working shaft (4) is connected to the island-type pedestrian area (2).

2. The fully mechanical construction combined tunnel-type station according to claim 1 is characterized by: The track area (1), the island-type pedestrian area (2), and the platform connection passage (3) are connected to form a platform layer, and there are one or more island-type pedestrian areas (2).

3. The fully mechanical construction combined tunnel-type station according to claim 2 is characterized by: A subway line track (14) is arranged in the track area (1), and a platform plate (13) is formed on one side of the subway line track (14) close to the island-type pedestrian area (2), and the platform plate (13) is flush with the platform connecting passage (3).

4. The fully mechanically constructed combined tunnel-type station according to claim 3 is characterized by: The bottom of the platform connecting passage (3) passes through the island-type pedestrian area (2), and a backfill area (22) is provided in the island-type pedestrian area (2) to support the bottom of the platform connecting passage (3).

5. The fully mechanical construction combined tunnel-type station according to claim 1 is characterized by: The island-type pedestrian area (2) comprises a pedestrian area shield segment (21), and the pedestrian area shield segment (21) comprises an arc-shaped area and a straight area.

6. The fully mechanically constructed combined tunnel-type station according to claim 5 is characterized by: The straight area of ​​the pedestrian area shield segment (21) is connected to the platform connecting passage (3).

7. The fully mechanically constructed combined tunnel-type station according to claim 5 is characterized by: The arc-shaped area of ​​the pedestrian area shield segment (21) is in the shape of a spatial arc and is connected to the working shaft (4).

8. The fully mechanically constructed combined tunnel-type station according to claim 7 is characterized in that: The arc-shaped area of ​​the pedestrian area shield segment (21) spatially avoids the track area shield segment (11) of the side track area (1).

9. A fully mechanically constructed combined tunnel-type station and its construction method, characterized in that: The following steps are involved: A. Open excavation of the working shaft (4); B. Using the working shaft (4) as the starting point of the shield machine, construct the track area (1) and the island pedestrian area (2); C. constructing a platform connecting passage (3) between the track area (1) and the island pedestrian area (2); D. Functional division of the working shaft (4); E. Complete the construction of the entire station.

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