A rail well support structure with prefabricated steel buttress columns and a construction method thereof

Abstract

The present invention relates to the field of urban rail transit building technology, and discloses a track well support structure of prefabricated steel buttress columns and a construction method. The support structure comprises a station top plate, a station middle plate, a station bottom plate, a side wall, a first prefabricated steel buttress column and a second prefabricated steel buttress column. The first prefabricated steel buttress column and the second prefabricated steel buttress column are both arranged on the side wall. The two ends of the first prefabricated steel buttress column are respectively connected to the station middle plate and the station bottom plate, and the two ends of the second prefabricated steel buttress column are respectively connected to the station middle plate and the station top plate. The overall structure is simple. By arranging steel buttress columns inside the station, the structural strength of the track well is enhanced, and the need for external expansion support on the outer wall of the station is avoided. At the same time, the construction method of the support structure will not cause waste of space used in the later stage, save investment, and improve the construction speed.

Description

Technical Field

[0001] The invention relates to the technical field of urban rail transit construction, and in particular to a rail well supporting structure of a prefabricated steel buttress column and a construction method. Background Art

[0002] With the rapid development of urban rail transit, urban rail transit lines have gradually formed a network. Urban rail transit lines are densely laid in the central area of ​​the city, so the environment around the subway station is poor and the construction site is small. Under the condition of a certain construction period, if the civil engineering project provides conditions for the later track laying, it is necessary to set up track wells as much as possible. However, due to the influence of the subway station location environment, construction site and early construction project planning, some stations did not consider track wells in the early stage of civil construction or the station construction site was limited, and there was no ability to set up pile anchor support or buttress column wall structure support (traditional support requires the station's outer wall to be expanded to a certain range).

[0003] At present, the existing track well support technologies mainly include: pile + anchor cable support scheme, buttress column + ring frame beam structure support scheme, etc. Pile + anchor cable support scheme: When the station is constructing the main retaining piles, the track well range of the station is partially expanded, and anchor cables are installed during the excavation of the foundation pit. After the main structure of the station is completed, the pile + anchor cable support scheme is used to resist water and soil pressure, and avoid the main structure of the track well range from being subjected to lateral water and soil pressure during track laying, thereby achieving structural safety. Buttress column wall structure support: When the station is constructing the retaining piles, the track well range of the station is partially expanded. When constructing the main structure of the station, the structure is built according to the expanded outline, and buttress columns and ring frame beams are constructed simultaneously, so as to resist the lateral water and soil pressure through the buttress column + ring frame beam structure system, and ensure the force requirements of the main structure of the station during the track laying process. The pile + anchor cable solution needs to expand the rail well range to install anchor cables, which has high requirements on the surrounding environment and requires a site for anchor cable installation. In addition, there are many inconveniences in the use of surrounding underground space in the later stage. The buttress column + ring frame beam structural support solution needs to expand the rail well range to install buttress columns and ring frame beams. Buttress columns and ring frame beams not only increase investment, but also have no use in the later stage. Summary of the invention

[0004] The present invention provides a track well support structure of prefabricated steel buttress columns and a construction method to solve the problems in the prior art that anchor cables cannot be set or the structure is partially laid out due to the poor construction environment of the subway station, the early stage engineering planning is not fully considered and additional track wells need to be set up, and the like.

[0005] In order to solve the above technical problems, the present invention provides a track well support structure of prefabricated steel buttress columns, which includes a station top plate, a station middle plate, a station bottom plate, a side wall, a first prefabricated steel buttress column and a second prefabricated steel buttress column, the two ends of the station top plate are connected to the side walls, the two ends of the station middle plate are connected to the side walls, and the two ends of the station bottom plate are connected to the side walls; the first prefabricated steel buttress column and the second prefabricated steel buttress column are both arranged on the side walls, the two ends of the first prefabricated steel buttress column are respectively connected to the station middle plate and the station bottom plate, the two ends of the second prefabricated steel buttress column are respectively connected to the station middle plate and the station top plate, and the first prefabricated steel buttress column and the second prefabricated steel buttress column are correspondingly arranged.

[0006] As a preferred solution, the station roof is provided with a first rail drain well, and the station floor is provided with a second rail drain well, and the first rail drain well and the second rail drain well are arranged correspondingly.

[0007] As a preferred solution, there are multiple first prefabricated steel buttress columns, which are equidistantly arranged, and multiple first prefabricated steel buttress columns are arranged corresponding to the first rail row well and the second rail row well; there are multiple second prefabricated steel buttress columns, which are equidistantly arranged, and multiple second prefabricated steel buttress columns are arranged corresponding to the first rail row well and the second rail row well.

[0008] As a preferred embodiment, the rail well support structure of the prefabricated steel buttress columns also includes steel plates and anchor bolts, which are evenly embedded in the side walls, the station top plate, the station middle plate and the station bottom plate, and are connected to the prefabricated steel buttress columns.

[0009] The present invention also provides a construction method of a rail well support structure based on the above-mentioned prefabricated steel buttress column, the construction method comprising:

[0010] S1, excavate the foundation pit, set up supports in sequence, and excavate earth in sequence until the foundation pit excavation is completed;

[0011] S2, pouring the station floor, and pre-embedding the steel plates and anchor bolts on the station floor at equal intervals at the connection between the station floor and the first prefabricated steel buttress column;

[0012] S3, casting the side wall to the height of the subway middle plate, and pre-embedding the steel plate and anchor bolts on the side wall at equal intervals at the connection between the side wall and the first prefabricated steel buttress column;

[0013] S4, connecting the first prefabricated steel buttress column to the station floor and the side wall using bolts;

[0014] S5, casting the station middle plate, and pre-embedding the steel plates and anchor bolts on the station middle plate at equal intervals at the connection between the station middle plate and the first prefabricated steel buttress column, and pre-embedding the steel plates and anchor bolts on the station middle plate at equal intervals at the connection between the station middle plate and the second prefabricated steel buttress column;

[0015] S6, continue pouring the side wall to the height of the subway roof, and pre-embed the steel plates and anchor bolts on the side wall at equal intervals at the connection between the side wall and the second prefabricated steel buttress column;

[0016] S7, connecting the second prefabricated steel buttress column to the station middle plate and the side wall using bolts;

[0017] S8, pouring the station roof, and pre-embedding the steel plates and anchor bolts on the station roof at equal intervals at the connection between the station roof and the second prefabricated steel buttress columns;

[0018] S9, using bolts to connect the first prefabricated steel buttress column to the station middle plate, and to connect the second prefabricated steel buttress column to the station top plate;

[0019] S10, after the track is laid, the first rail well and the second rail well are poured with micro-expansive concrete to complete the post-pouring process of the station middle plate and the station top plate;

[0020] S11, after the strength of the rail well supporting structure of the prefabricated steel buttress column reaches a certain level, dismantling the first prefabricated steel buttress column and the second prefabricated steel buttress column.

[0021] The present invention provides a track well support structure and construction method of prefabricated steel buttress columns, the support structure includes a station roof, a station middle plate, a station bottom plate, side walls, a first prefabricated steel buttress column and a second prefabricated steel buttress column, the first prefabricated steel buttress column and the second prefabricated steel buttress column are both arranged on the side walls, the two ends of the first prefabricated steel buttress column are respectively connected to the station middle plate and the station bottom plate, the two ends of the second prefabricated steel buttress column are respectively connected to the station middle plate and the station roof plate, the overall structure is simple, and the steel buttress columns are arranged inside the station, thereby enhancing the structural strength of the track well, avoiding the need for outward expansion support on the outer wall of the station, and at the same time, through the construction method of the support structure, no waste of space for later use will be caused, investment will be saved, and the construction speed will be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is one of the structural schematic diagrams of a rail well support structure of a prefabricated steel buttress column according to an embodiment of the present invention;

[0023] Figure 2This is one of the structural schematic diagrams of a rail well support structure of a prefabricated steel buttress column according to an embodiment of the present invention;

[0024] Figure 3 It is one of the structural schematic diagrams of a rail well support structure of a prefabricated steel buttress column in an embodiment of the present invention.

[0025] In the figure,

[0026] 1. Station roof;

[0027] 2. Station middle plate;

[0028] 3. Station floor;

[0029] 4. Side wall;

[0030] 51. a first prefabricated steel buttress column; 52. a second prefabricated steel buttress column;

[0031] 6. Steel plates and anchor bolts;

[0032] 71. First track drainage well; 72. Second track drainage well. DETAILED DESCRIPTION

[0033] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0034] like Figure 1 As shown, a track well support structure of a prefabricated steel buttress column of a preferred embodiment of the present invention comprises a station top plate 1, a station middle plate 2, a station bottom plate 3, a side wall 4, a first prefabricated steel buttress column 51 and a second prefabricated steel buttress column 52. The two ends of the station top plate 1 are connected to the side wall 4, the two ends of the station middle plate 2 are connected to the side wall 4, and the two ends of the station bottom plate 3 are connected to the side wall 4. The first prefabricated steel buttress column 51 and the second prefabricated steel buttress column 52 are both arranged on the side wall 4, the two ends of the first prefabricated steel buttress column 51 are respectively connected to the station middle plate 2 and the station bottom plate 3, the two ends of the second prefabricated steel buttress column are respectively connected to the station middle plate 2 and the station top plate 1, and the first prefabricated steel buttress column 51 and the second prefabricated steel buttress column 52 are arranged correspondingly. The overall structure is simple. By arranging steel buttress columns inside the station, the structural strength of the track well is enhanced, and the need for external expansion support on the station outer wall is avoided.

[0035] like Figure 2 As shown, the station roof 1 is provided with a first rail drain well 71, and the station floor 3 is provided with a second rail drain well 72, and the first rail drain well 71 and the second rail drain well 72 are arranged correspondingly.

[0036] It should be noted here that the provision of the first rail shaft 71 and the second rail shaft 72 facilitates the transportation of the rails into the station. At the same time, after the station track is laid, the first rail shaft 71 and the second rail shaft 72 are cast and closed, and then the station top plate 1 and the station bottom plate 3 are cast and completed, thus avoiding waste of space.

[0037] like Figure 3 As shown, there are multiple first prefabricated steel buttress columns 51, which are equidistantly arranged, and the multiple first prefabricated steel buttress columns 51 are arranged corresponding to the first rail row well 71 and the second rail row well 72; there are multiple second prefabricated steel buttress columns 52, which are equidistantly arranged, and the multiple second prefabricated steel buttress columns 52 are arranged corresponding to the first rail row well 71 and the second rail row well 72.

[0038] It should be noted here that steel buttress columns are set inside the station corresponding to the track shaft, which enhances the overall strength of the station when transporting rails into the station. After the track laying is completed, the steel buttress columns can be dismantled and reused, saving materials and reducing station construction investment.

[0039] Preferably, the track well support structure of the prefabricated steel buttress columns also includes steel plates and anchor bolts 6, which are evenly embedded in the side walls 4, the station top plate 1, the station middle plate 2 and the station bottom plate 3, and the steel plates and anchor bolts 6 are connected to the prefabricated steel buttress columns.

[0040] It should be noted that bolts are used to connect the structural plates (walls) of each layer, the force is clear, the overall rigidity is large, and the overall strength of the station during construction is enhanced. The construction operation is simple and the later disassembly is convenient.

[0041] The present invention also provides a preferred embodiment of a construction method of a rail well support structure of a prefabricated steel buttress column, the construction method comprising:

[0042] S1, excavate the foundation pit, set up supports in sequence, and excavate earth in sequence until the foundation pit excavation is completed;

[0043] S2, pouring the station floor 3, and pre-embedding steel plates and anchor bolts 6 on the station floor 3 at equal intervals at the connection between the station floor 3 and the first prefabricated steel buttress column 51;

[0044] S3, pouring the side wall 4 to the height of the subway middle plate, and pre-embedding steel plates and anchor bolts 6 on the side wall 4 at equal intervals at the connection between the side wall 4 and the first prefabricated steel buttress column 51;

[0045] S4, using bolts to connect the first prefabricated steel buttress column 51 to the station floor 3 and the side wall 4;

[0046] S5, pouring the station middle plate 2, and pre-embedding steel plates and anchor bolts 6 on the station middle plate 2 at equal intervals at the connection between the station middle plate 2 and the first prefabricated steel buttress column 51, and pre-embedding steel plates and anchor bolts 6 on the station middle plate 2 at equal intervals at the connection between the station middle plate 2 and the second prefabricated steel buttress column 52;

[0047] S6, continue pouring the side wall 4 to the height of the subway roof, and pre-embed steel plates and anchor bolts 6 on the side wall 4 at equal intervals at the connection between the side wall 4 and the second prefabricated steel buttress column 52;

[0048] S7, connecting the second prefabricated steel buttress column 52 to the station middle plate 2 and the side wall 4 using bolts;

[0049] S8, pouring the station roof 1, and pre-embedding steel plates and anchor bolts 6 on the station roof 1 at equal intervals at the connection between the station roof 1 and the second prefabricated steel buttress column 52;

[0050] S9, use bolts to connect the first prefabricated steel buttress column 51 to the station middle plate 2, and connect the second prefabricated steel buttress column 52 to the station top plate 1;

[0051] S10, after the track is laid, the first rail well 71 and the second rail well 72 are poured using micro-expansive concrete to complete the post-pouring process of the station middle plate 2 and the station top plate 1;

[0052] S11, after the strength of the rail shaft supporting structure of the prefabricated steel buttress column reaches a certain level, the first prefabricated steel buttress column 51 and the second prefabricated steel buttress column 52 are dismantled.

[0053] It should be noted here that the above construction method does not require the setting of anchor cables or the setting of reinforced concrete buttress columns + ring frame beam structures, which saves materials, reduces costs and improves construction efficiency. At the same time, the support structure is constructed inside the station, and the station structure does not need to be expanded outward, which reduces the construction space of the station and optimizes the construction environment.

[0054] In summary, the embodiments of the present invention provide a track well support structure and construction method of prefabricated steel buttress columns, the support structure comprising a station top plate, a station middle plate, a station bottom plate, side walls, a first prefabricated steel buttress column and a second prefabricated steel buttress column, the first prefabricated steel buttress column and the second prefabricated steel buttress column are both arranged on the side walls, the two ends of the first prefabricated steel buttress column are respectively connected to the station middle plate and the station bottom plate, the two ends of the second prefabricated steel buttress column are respectively connected to the station middle plate and the station top plate, the overall structure is simple, and the steel buttress columns are arranged inside the station, thereby enhancing the structural strength of the track well, avoiding the need for outward expansion support on the outer wall of the station, and at the same time, through the construction method of the support structure, there will be no waste of space for later use, saving investment and increasing the construction speed.

[0055] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary counting personnel in this technical field, several improvements and substitutions can be made without departing from the counting principle of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A rail well support structure with prefabricated steel buttress columns, characterized in that: It includes a station top plate, a station middle plate, a station bottom plate, a side wall, a first prefabricated steel buttress column and a second prefabricated steel buttress column, wherein both ends of the station top plate are connected to the side wall, both ends of the station middle plate are connected to the side wall, and both ends of the station bottom plate are connected to the side wall; The first prefabricated steel buttress column and the second prefabricated steel buttress column are both arranged on the side wall, the two ends of the first prefabricated steel buttress column are respectively connected to the station middle plate and the station bottom plate, the two ends of the second prefabricated steel buttress column are respectively connected to the station middle plate and the station top plate, and the first prefabricated steel buttress column and the second prefabricated steel buttress column are arranged correspondingly; The rail well support structure further includes steel plates and anchor bolts, which are evenly embedded in the side walls, the station top plate, the station middle plate and the station bottom plate, and are connected to the first prefabricated steel buttress column and the second prefabricated steel buttress column; the first prefabricated steel buttress column and the second prefabricated steel buttress column can be dismantled and reused; The station roof is provided with a first rail well, and the station floor is provided with a second rail well, and the first rail well and the second rail well are arranged correspondingly; the first prefabricated steel buttress column and the second prefabricated steel buttress column are evenly arranged along the length direction of the first rail well and the second rail well, and are respectively arranged at the front end and the rear end of the length direction of the first rail well and the second rail well.

2. The rail well support structure of the prefabricated steel buttress column according to claim 1, characterized in that: There are multiple first prefabricated steel buttress columns, which are equidistantly arranged and arranged corresponding to the first rail row well and the second rail row well. There are multiple second prefabricated steel buttress columns, which are equidistantly arranged and arranged corresponding to the first rail row well and the second rail row well.

3. A construction method for a rail well support structure based on the prefabricated steel buttress columns according to claims 1 to 2, characterized in that: The construction method comprises: S1, excavate the foundation pit, set up supports in sequence, and excavate earth in sequence until the foundation pit excavation is completed; S2, pouring the station floor, and pre-embedding the steel plates and anchor bolts on the station floor at equal intervals at the connection between the station floor and the first prefabricated steel buttress column; S3, casting the side wall to the height of the station middle plate, and pre-embedding the steel plate and anchor bolts on the side wall at equal intervals at the connection between the side wall and the first prefabricated steel buttress column; S4, connecting the first prefabricated steel buttress column to the station floor and the side wall using bolts; S5, casting the station middle plate, and pre-embedding the steel plates and anchor bolts on the station middle plate at equal intervals at the connection between the station middle plate and the first prefabricated steel buttress column, and pre-embedding the steel plates and anchor bolts on the station middle plate at equal intervals at the connection between the station middle plate and the second prefabricated steel buttress column; S6, continue pouring the side wall to the height of the station roof, and pre-embed the steel plates and anchor bolts on the side wall at equal intervals at the connection between the side wall and the second prefabricated steel buttress column; S7, connecting the second prefabricated steel buttress column to the station middle plate and the side wall using bolts; S8, pouring the station roof, and pre-embedding the steel plates and anchor bolts on the station roof at equal intervals at the connection between the station roof and the second prefabricated steel buttress columns; S9, using bolts to connect the first prefabricated steel buttress column to the station middle plate, and connect the second prefabricated steel buttress column to the station top plate; S10, after the track is laid, the first rail well and the second rail well are poured with micro-expansive concrete to complete the post-pouring process of the station middle plate and the station top plate; S11, after the strength of the rail well supporting structure of the prefabricated steel buttress column reaches a certain level, dismantling the first prefabricated steel buttress column and the second prefabricated steel buttress column.

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