Protective enclosure for in-station reconstruction construction of existing subway station

Abstract

The utility model discloses a protective fence for reconstruction construction in an existing subway station, which comprises a plurality of upright posts arranged in a rectangular array, top protective blocks are arranged at the upper parts of two adjacent columns or two rows of upright posts, and vertical protective blocks are arranged between two adjacent upright posts in one column or one row of upright posts adjacent to the existing subway station; the top protection block or the vertical protection block comprises a plurality of pairs of keels vertically arranged between every two adjacent stand columns at intervals and a panel fixed in a gap between every two keels in each pair of keels. According to the protective fence, the totally-closed isolation of the existing subway station demolition and transformation construction range can be realized, the operation safety of the existing line during construction is effectively guaranteed, and the risk that falling objects, smoke dust and construction water enter the existing line in the construction range is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of underground engineering, in particular to a protective enclosure for renovation construction in an existing subway station. Background Art

[0002] With the large-scale construction of urban rail transit, the rail transit network is rapidly formed. More and more new subway stations need to realize cross-transfer with existing lines. Constrained by the spatial planning and layout of new lines, during the construction of new subways, some structures of existing operating line stations may face demolition and reconstruction, and the reconstruction of station structures will have an impact on the operation of existing lines. In order to facilitate construction and ensure the safe operation of existing lines during construction, it is necessary to fully enclose and isolate the demolition and reconstruction scope of existing stations. The demolition and reconstruction of existing stations involves concrete cutting, steel welding, etc. The construction process will generate a large amount of smoke, construction water, etc., so the requirements for construction protection measures are relatively high. It is necessary not only to ensure the spatial isolation between the construction area and the station operation area, but also to prevent smoke, construction water and other fluids from entering the station operation area. When the demolition and reconstruction range enters the track area, the wind resistance of the enclosure must also be considered. At the same time, the construction enclosure cannot affect the train driver's line of sight.

[0003] Therefore, when the construction of a new subway requires the demolition and reconstruction of the existing subway station, the above factors need to be taken into consideration and targeted design of fully enclosed construction protection fences should be carried out. Utility Model Content

[0004] In order to address the deficiencies in the prior art, the utility model provides a protective enclosure for the renovation construction within an existing subway station, which can achieve fully enclosed isolation of the demolition and renovation construction range of the existing subway station, effectively ensuring the operational safety of the existing line during the construction period, and avoiding the risk of falling objects, smoke and dust, and construction water entering the existing line within the construction range.

[0005] In order to achieve the above purpose, the specific scheme adopted by the utility model is:

[0006] A protective enclosure for renovation construction in an existing subway station, comprising a plurality of columns arranged in a rectangular array, top protective blocks being provided on the upper parts of two adjacent columns or rows of columns, and vertical protective blocks being provided between two adjacent columns in a column or row of columns adjacent to the existing subway station;

[0007] The top protection block or the vertical protection block includes a plurality of pairs of keels vertically spaced between two adjacent columns and a panel fixed in the gap between two keels in each pair of keels.

[0008] Furthermore, flanges are welded at both ends of the column and fixed to the existing structure by expansion bolts.

[0009] Furthermore, at least one top protection block constitutes a top protection structure, and at least one vertical protection block constitutes a vertical protection structure. The protection enclosure also includes a frame ring beam, and the frame ring beam is respectively connected to the outer columns, the exposed outer side of the top protection structure, and the walls inside the existing subway station.

[0010] Furthermore, the frame ring beam is made of square steel pipe.

[0011] Furthermore, each pair of keels and panels are fixed with colored steel nails.

[0012] Furthermore, the keel is made of square steel pipe.

[0013] Furthermore, the panel is made of galvanized steel plate.

[0014] Furthermore, the connection between the protective enclosure and the existing subway station structure is provided with a sealing structure formed by sealant, and the connection between the keel and the column, and the connection between the keel and the panel are provided with a sealing structure formed by sealant.

[0015] Furthermore, the reserved distance between the protective enclosure and the edge of the existing platform slab is not less than 50 cm.

[0016] Beneficial effects:

[0017] 1) The protective enclosure in the utility model can achieve full enclosure and isolation of the demolition and reconstruction construction scope of the existing subway station, effectively ensuring the operational safety of the existing line during the construction period, and avoiding the risk of falling objects, smoke and dust, and construction water entering the existing line within the construction scope.

[0018] 2) The utility model adopts paired keels to limit the two sides of the panel, thereby enhancing the stability and bearing capacity of the panel and improving the ability of the protective enclosure to resist the wind load of the train and the impact load of falling objects.

[0019] 3) When the protective fence is close to the platform, the distance between the protective fence and the edge of the platform should be reasonably set to avoid affecting the train driver's line of sight. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an overall schematic diagram of the protective enclosure.

[0021] Figure 2 It is a structural diagram of the upper end of the column.

[0022] Figure 3 It is a schematic diagram of the connection between the keel, column and panel.

[0023] Figure 4 It is a schematic diagram of the position relationship between the protective enclosure and the edge of the platform slab.

[0024] Graphic markings: 1. Column, 2. Panel, 3. Purlin, 4. Frame ring beam, 5. Flange, 6. Expansion bolt, 7. Colored steel nail, 8. Platform board. DETAILED DESCRIPTION

[0025] The technical solution of the utility model will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0026] The utility model provides a protective enclosure for renovation construction inside an existing subway station, comprising a plurality of columns 1 arranged in a rectangular array, flanges 5 welded at both ends of the columns 1, and fixed to the existing structure by expansion bolts 6. Top protective blocks are provided on the upper parts of two adjacent columns or rows of columns 1, and a vertical protective block is provided between two adjacent columns 1 in a column or row of columns 1 adjacent to the existing subway station; the top protective blocks or vertical protective blocks each include a plurality of pairs of keels 3 vertically spaced between two adjacent columns 1 and a panel 2 fixed in the gap between two keels 3 in each pair of keels 3, and each pair of keels 3 and the panel 2 are fixed with colored steel nails 7. At least one top protective block constitutes a top protective structure, and at least one vertical protective block constitutes a vertical protective structure, and both the top protective structure and the vertical protective structure are supported by the columns 1.

[0027] Vertical protection blocks are used to separate the normal traffic area from the construction area of ​​the subway station. Top protection blocks are used to eliminate the risk of debris falling within the scope of station renovation, such as the gaps or cavities surrounded by staircase side walls and load-bearing walls in the station. Debris generated by demolition and renovation construction may fall through these gaps, threatening the safety of personnel in the station and train driving.

[0028] It should be noted that the thickness of the top protection block and the panel 2 in the vertical protection block, the size of the pores in each pair of keels 3, and the spacing between two adjacent pairs of keels 3 can be the same or different.

[0029] Preferably, the protective enclosure also includes a frame ring beam 4, which is respectively connected to the outer column 1, the exposed outer side surface of the top protective structure, and the existing subway station interior wall, thereby enhancing the ability of the top protective structure to resist the impact load of falling objects.

[0030] The connection between the protective enclosure and the existing subway station structure is provided with a sealing structure formed by sealant. The connection between the keel 3 and the column 2, and the connection between the keel 3 and the panel 2 are provided with a sealing structure formed by sealant to prevent smoke and dust generated by the construction from entering the existing line.

[0031] Specifically, the frame ring beam 4 and the keel 3 are made of square steel tubes of the same type, and the panel 2 is made of galvanized steel plate, so the strength is guaranteed and the materials are easy to obtain.

[0032] When the protective enclosure is close to the platform, in order to ensure that the protective enclosure does not block the train driver's view, the reserved distance between the protective enclosure and the edge of the existing platform plate 8 is not less than 50 cm.

[0033] The wind resistance and stability of the protective enclosure as a whole should be calculated for the wind load generated by the subway train, and the model of the keel 3 and the column 1 and the design of their spacing should be carried out based on the calculation results.

[0034] The layout method of the protective enclosure is as follows:

[0035] (1) First, remove the floor tiles within the scope of the water retaining sill to expose the existing concrete surface of the structure; remove the existing station decoration layer within the scope of construction protection to expose the existing concrete surface of the structure, so as to facilitate the installation and fixation of the protective enclosure;

[0036] (2) Build a water retaining sill on the concrete surface inside the protective enclosure and apply waterproof mortar to the surface;

[0037] (3) Erect the column 1, weld the flange 5 at the top and bottom of the column 1 outside the station in advance, and then fix it to the existing station structure through expansion bolts 6;

[0038] (4) Set up the keel 3 and the panel 2. The keel 3 is first overlapped with the column 1 through the preset connection hole on the column 1, and then fixed with bolts. The keels 3 are arranged in pairs on both sides. After the keel 3 is installed, the panel 2 is inserted into the gap formed by the two side-by-side keels 3 and fixed with the keel 3 by colored steel nails 7. The top protection structure and the vertical protection structure are installed according to this method;

[0039] (5) After the erection is completed, a circle of frame ring beam 4 is connected to the exposed outer side of the outer column 1 and the top protective structure, and the frame ring beam 4 is fixed to the existing structure by expansion bolts;

[0040] (6) After the erection of the protective fence is completed, polyurethane sealant shall be used to seal the joints between the protective fence and the existing structure and the connection nodes of the components on the protective fence.

[0041] Example 1

[0042] A new subway station is built vertically across the existing operating line station and section. The crossing position is located at the connection between the end wall of the existing station and the section. The existing station is a two-story rectangular frame structure, the first underground floor is the station hall floor, the second underground floor is the platform floor and the existing line track area. There is a position conflict between the track area of ​​the new station and the end of the first underground floor of the existing station. The top plate, side wall, middle plate, part of the platform plate on the second underground floor and other structures at the corresponding positions of the first underground floor of the existing station need to be demolished and reconstructed to facilitate the construction of the new structure. The entire demolition and reconstruction process cannot affect the operation of the existing line. There is a cavity surrounded by three stair side walls and one load-bearing wall in the station within the demolition and reconstruction scope. The existence of the cavity connects the demolition and reconstruction area of ​​the first underground floor with the existing platform position on the second underground floor that does not need to be reconstructed. There is a risk of falling debris, so a top protective structure needs to be set up.

[0043] To this end, it is necessary to set up a fully enclosed protective enclosure at the end of the platform slab on the second floor below ground in the existing station. For the specific structure, please refer to Figures 1 to 4 The vertical protection structure is overlapped with the existing platform slab 8 structure that does not need to be removed, and the horizontal distance from the edge of the existing platform slab 8 is 50cm to avoid obstruction of the train driver's vision. After removing the floor tiles to the concrete surface on the inside of the vertical protection structure, a 20cm high water retaining sill is built and the surface is plastered with waterproof mortar to prevent construction water from entering the track area. The top decorative layer within the construction range is removed to facilitate the subsequent fixation of the vertical protection structure.

[0044] The wind load calculation is carried out according to the wind pressure value of 3.5kPa when the train enters and leaves the station to determine the selection of the protective enclosure structure. After calculation, the parameters of the protective enclosure structure are as follows:

[0045] 1) Column 1: Column 1 is made of 100mm×100mm square steel pipe, the distance between adjacent columns 1 is about 1~1.2m, 15mm×200mm×200mm flanges 5 are welded at both ends, and fixed to the existing structural concrete at the bottom and top through expansion bolts 6;

[0046] 2) Top protection block: Panel 2 is made of 2.0mm thick galvanized steel plate; frame ring beam 4 is made of 100mm×100mm square steel pipe, keel 3 is made of 40mm×40mm×3mm square steel pipe, double-sided arrangement, side-by-side center distance is 44mm, adjacent keels 3 center distance is 0.6m; panel 2 is inserted into the gap formed between two rows of keels 3, and fixed to keels 3 with colored steel nails 7; after the top protection structure is erected, expansion bolts are used to fix the frame ring beam 4 to the four walls surrounding the cavity.

[0047] 3) Vertical protective block: Panel 2 is made of 2.0mm thick galvanized steel plate; keel 3 is made of 40mm×40mm×3mm square steel tube, double-sided arrangement, side-by-side center distance is 44mm, and the center distance between adjacent keels 3 is 1m; panel 2 is inserted into the gap formed between two rows of keels 3 and fixed to keels 3 with colored steel nails 7.

[0048] After the protective fence is erected, polyurethane sealant is used to seal the joints between the protective fence and the existing structure and the connection nodes of the components on the protective fence.

[0049] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Any equivalent changes or modifications made according to the essence of the utility model should be included in the protection scope of the utility model.

Claims

1. A protective enclosure for renovation construction in an existing subway station, characterized in that: It comprises a plurality of columns arranged in a rectangular array, wherein top protective blocks are provided on the upper parts of two adjacent columns or rows of columns, and a vertical protective block is provided between two adjacent columns in a column or row of columns adjacent to an existing subway station; The top protection block or the vertical protection block includes a plurality of pairs of keels vertically spaced between two adjacent columns and a panel fixed in the gap between two keels in each pair of keels.

2. According to claim 1, a protective enclosure for renovation construction in an existing subway station is characterized in that: Flanges are welded at both ends of the column and fixed to the existing structure by expansion bolts.

3. The protective enclosure for renovation construction in an existing subway station according to claim 1 is characterized in that: At least one top protection block constitutes a top protection structure, and at least one vertical protection block constitutes a vertical protection structure. The protection enclosure also includes a frame ring beam, which is respectively connected to the outer columns, the exposed outer side of the top protection structure, and the walls inside the existing subway station.

4. The protective enclosure for renovation construction in an existing subway station according to claim 3 is characterized in that: The frame ring beam is made of square steel pipe.

5. The protective enclosure for renovation construction in an existing subway station according to claim 1 is characterized in that: Each pair of keels and panels are fixed with colored steel nails.

6. The protective enclosure for renovation construction in an existing subway station according to claim 1 is characterized in that: The keel is made of square steel pipe.

7. The protective enclosure for renovation construction in an existing subway station according to claim 1 is characterized in that: The panel is made of galvanized steel plate.

8. The protective enclosure for renovation construction in an existing subway station according to claim 1 is characterized in that: The connection between the protective enclosure and the existing subway station structure is provided with a sealing structure formed by sealant, and the connection between the keel and the column and the connection between the keel and the panel are provided with a sealing structure formed by sealant.

9. The protective enclosure for renovation construction in an existing subway station according to claim 1 is characterized in that: The reserved distance between the protective enclosure and the edge of the existing platform slab shall not be less than 50cm.

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