CN113833292A - Reconstruction method of station canopy - Google Patents
Reconstruction method of station canopy Download PDFInfo
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- CN113833292A CN113833292A CN202110592064.5A CN202110592064A CN113833292A CN 113833292 A CN113833292 A CN 113833292A CN 202110592064 A CN202110592064 A CN 202110592064A CN 113833292 A CN113833292 A CN 113833292A
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000010276 construction Methods 0.000 claims abstract description 32
- 230000001681 protective effect Effects 0.000 claims abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 19
- 239000010959 steel Substances 0.000 claims description 19
- 238000009434 installation Methods 0.000 claims description 18
- 238000005192 partition Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000011900 installation process Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 description 5
- 230000032258 transport Effects 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0266—Enlarging
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Abstract
The invention discloses a reconstruction method of a station canopy, which comprises the steps of constructing trolley tracks on two sides of an old canopy and assembling module trolleys, carrying a newly-built canopy unit on the top of each module trolley and then walking to a preset position for fixing, enabling the newly-built canopy unit on each module trolley to be supported by a support upright post, splicing a plurality of module trolleys into a tunnel type protective structure, disassembling the old canopy after the newly-built canopy is installed, and transporting the disassembled old canopy unit out of the range of the newly-built canopy one by using the module trolleys. According to the invention, when the canopy is newly built, the old canopy is not removed, the original normal use of a station is not influenced, and the protection structure of the old canopy is formed by splicing a plurality of module trolleys, so that the construction safety is ensured.
Description
Technical Field
The invention relates to a method for reconstructing a canopy of an existing station.
Background
With the expansion and development of cities, some originally built rail platforms cannot meet the requirements of passenger flow or modernization, and original stations need to be reconstructed. The existing platform canopy structure is generally arranged along a tunnel type track, the tracks on two sides of the platform and the platform are arranged below the canopy, along with reconstruction of the station, the canopy needs to be reconstructed into a larger and more attractive structure, and the existing canopy needs to be dismantled.
The reconstruction construction needs to ensure the normal operation of the existing subway line and the normal operation of ground traffic at the same time. In order to ensure that construction is carried out close to a business line, construction of the upper part of a rail walking area and construction of a side type platform are carried out in a skylight point, construction of a newly-built steel structure net rack needs to be carried out on the existing line in a large amount of high-altitude assembly and welding, and the high-quality and safety risks exist; meanwhile, the smooth operation of the dismantling of the old rainshed is ensured. The operation field and the storage yard are small, the field operation area and the material storage yard are compact to meet the requirement of smooth traffic as far as possible, and the situation of material transfer for many times is formed.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the problems of narrow construction time window, narrow site and high safety risk existing in the reconstruction of the existing station are solved.
The technical scheme of the invention is as follows:
a reconstruction method of a station canopy comprises the following steps: set up the platform truck track and assemble the module platform truck in old canopy both sides, it is fixed to walk to preset position after carrying on newly-built canopy unit at every module platform truck top, changes the newly-built canopy unit on the module platform truck and supports by the support post, and a plurality of module platform trucks splice is the protective structure of a tunnel type, and the old canopy of new canopy installation partition after finishing, utilizes the module platform truck to transport the old canopy unit of partition one by one outside newly-built canopy scope.
And (3) building extension platforms at two ends of the old canopy as the areas for assembling and hoisting the module trolleys and hoisting new and old canopy units, and connecting the two extension platforms by trolley tracks arranged on two sides of the old canopy.
The newly-built canopy is in a cross star shape and is divided into five parts, namely a left part, a middle part, a right part, an upper part and a lower part, wherein the canopy parts at two ends of the track are firstly installed, the canopy at the middle part is installed, and finally the canopy at two sides of the track is installed.
Adopting a large crawler crane to install the extension platform, and the installation steps are as follows: the method comprises the following steps of strip foundation construction, hoisting and mounting of the steel pipe column, the longitudinal beam and the connecting system, mounting of the Bailey beam, and mounting of the distribution beam and the track.
And after the installation of the extension platform and the trolley track is finished, the module trolley with the assembled main body structure is hung to the extension platform, and the installation of the panel and the protective structure of the trolley is finished on the extension platform.
After the installation of the extension platform and the trolley track is finished, the installation of the newly-built canopy column and the support is carried out, and the installation process is as follows: binding and hoisting the steel column, temporarily aligning and fixing the steel column, and formally installing the steel beam.
The method comprises the steps of firstly installing a framework structure of a new canopy, firstly installing a canopy framework in the middle according to the framework structures of the new canopy at two ends of a rail, and finally installing the canopy frameworks at two sides of the rail in a retreating mode from one side close to the rail to the direction far away from the rail.
And after the new canopy framework is installed, installing a panel and a decorative part of the new canopy.
After the new canopy is installed, the old canopy is disassembled by using the skylight time, the disassembled old canopy unit is hung below the module trolley, and the old canopy unit travels along with the module trolley to the extension platform to be hung away
When the old rainshed is dismantled, the rainshed plates are firstly dismantled, the rainshed plates are placed to the side face of the platform or the top of the module trolley through transmission, then steel beams of the old rainshed units to be dismantled are fixed on the electric hoists of the corresponding module trolley, finally the connection relations of the old rainshed units to be dismantled are cut, and the old rainshed units are conveyed to the extension platform by the module trolley and are lifted away together.
The invention has the beneficial effects that:
(1) the modular trolley is used for supporting the newly-built canopy unit blocks in the rail-mounted area, the newly-built canopy unit blocks can be directly transported to positions required by design through longitudinal movement of the modular trolley, necessary support of the canopy unit in the rail-mounted area and the top of the transportation channel modular trolley are fully closed, and necessary protection measures of an existing platform and a rail area are formed during construction of the newly-built canopy unit blocks. After a plurality of module trolleys are connected into a whole, necessary means and passages for hoisting and transporting the existing canopy in blocks are formed by the aid of the lower hanging type rails attached to the module trolleys. The modular trolley integrates the functions of bearing, supporting, transporting and protecting shed units of new and old canopy units, avoids the repeated investment and the workload of mounting and dismounting of the supporting structure, saves the material and labor cost, and effectively saves the construction time.
(2) Set up the transfer platform of extension platform as various machinery and material at old canopy both ends to the solution is smooth and easy and the narrow and small problem of construction space that leads to for satisfying the traffic, and module platform truck and new, old canopy all transport the hoist and mount on extending the platform, have reduced the material and have stacked the place.
(3) Old canopy is not demolishd when newly-built canopy, does not influence the normal use originally of station, and the protective structure for old canopy through the concatenation of a plurality of module platform trucks guarantees construction safety. And after the new canopy is installed, the old canopy is dismantled, so that seamless connection of the new canopy and the old canopy is realized. The construction can be synchronously carried out at the two ends of the track, and the construction period is saved.
Drawings
Fig. 1 is a schematic structural diagram of the trolley for starting to hoist the module after the extension platform is set up.
Fig. 2 is a schematic view of the transport of a newly built canopy unit over an old canopy using a modular trolley.
Fig. 3 is a schematic structural view of splicing of the module trolley on the old canopy.
Fig. 4 is a schematic view of the modular trolleys after they have been spliced into a complete protective structure.
Fig. 5 is a schematic cross-sectional view of the platform when the canopy is newly constructed.
Fig. 6 is a schematic diagram of the construction sequence division of the newly-built canopy.
Fig. 7 is a sectional split schematic view of an old canopy.
Fig. 8 is a schematic view of an old canopy removal section hoisted by a module trolley, and a newly-built canopy is hidden in the diagram.
Detailed Description
Example (b): this embodiment is the transformation of a certain subway station of Shenzhen. The improved station roof structure is high in installation height and large in longitudinal and transverse span. The structure of the grid structure is relatively complex, the grid structure is a nonstandard component, and the number of rod types is large. The reconstruction construction needs to ensure the normal operation of the existing subway and the normal operation of ground traffic at the same time. Meanwhile, the project has extremely high construction period pressure. The construction of the roof structure crossing the existing track running area is the construction of crossing a normal operation track line, the construction can be only carried out at a skylight point, and the construction of newly-built steel structure net racks needs to carry out a large amount of high-altitude assembly and welding on the existing line, so that the construction has larger quality and safety risk; meanwhile, the removal work of the old canopy of the existing line is ensured to be smoothly carried out. The construction risk is extremely high, and the construction organization degree of difficulty is huge. In view of the above, a professional technical team of our company organizes the technical attack of the deployment of the new canopy construction and the existing canopy dismantling work for crossing the existing part, and provides a rail-mounted area canopy module trolley frame transportation construction technology. Referring to fig. 1-4, the module trolley 1 takes 12m as a module, and 16 truss trolley modules are arranged in the cross-track area. According to the structural arrangement characteristics of the canopy in the rail running area, the module trolley 1 and the new canopy are hoisted within the range of the extension platform, and the new canopy unit block 2 is transported in place through the module trolley 1, so that the hoisting influence range and the hoisting scale are effectively reduced. The new canopy unit block 2 is hoisted to the module table top 1 and supported by an assembling jig frame 12 arranged on the module table top. The top of the module trolley is totally closed and is used as the isolation protection of the station layer. The old canopy dismantling unit block is hoisted to the hanging walkway beam of the module trolley 1 through the electric hoist 11.
The structural form of the door type module trolley is shown in figure 8:
(1) panel: 6mm steel plate with patterns.
(2) A distribution beam: i20a I-steel is adopted, and the distance is 1000 mm.
(3) Crossbeam, stand: 2HN 900X 300 hot-rolled H-shaped steel (Q345B) is adopted.
(4) Bracing: h-section steel (Q345B) was hot-rolled at 2HM 588X 300.
(5) Hanging a walkway: 2HN 400X 200 hot-rolled H-section steel (Q345B) was used.
The construction steps of adopting the module trolley to reconstruct the canopy are as follows:
(1) an extension platform and a module trolley track are installed.
(2) And hoisting the module trolleys to the extension platform one by utilizing the skylight points.
(3) The newly-built canopy of the track area is divided into unit blocks and hoisted to the module table roof, and is supported on an assembling jig frame of the module table roof.
(4) And (3) transporting the newly-built canopy unit to a design position by the module trolley, and after the system is converted, converting the newly-built canopy unit into a platform upright post support.
(5) After the newly-built canopy unit is installed, the attached longitudinal rails of the module trolley are connected into a whole to form a longitudinal transportation channel of the existing wire old canopy.
(6) After the existing rainshed is cut off in blocks, the electric block on the longitudinal rail of the module trolley is used for conveying the rainshed to the outside of the range of a newly-built rainshed one by one, and the electric block is lifted to the outside of a rail-mounted area along with the module trolley.
Further detailed construction steps:
the method comprises the following steps: building an extension platform:
at night (22: 00-6: 00), building an extension platform foundation by using a 300t truck crane, a 200t crawler crane and the like in a matching manner, building extension platform columns, beams and panels, completing construction of four extension platforms according to the procedures, and building a temporary support frame of the rain shed in the rail traffic region on a platform;
step two: building a module trolley:
truss vehicle unit groups are respectively built in the installation and dismantling areas of the module trolleys at the north and south sides, canopy blocks are assembled, and the module trolleys at the middle 4 sections are directly hoisted to the installation position by using 400t crawler cranes in skylights (01: 30-4: 30). Then synchronously installing the east-west area platform main pipe support and the main horizontal, and symmetrically installing the rest module trolleys at two sides. The component of the part of newly-built canopy unit is hung to the module platform truck top to along with the module platform truck transports to the track district top, splice 16 module platform trucks into complete support and protective structure.
Step three: installing the vertical columns and the horizontal pipes of the canopy in the rail traveling area:
in the skylight (1: 30-4: 30), a 400t crawler crane is used for hanging, a temporary support of the canopy in the rail-mounted area is arranged on the side type platform, and a vertical column of the canopy and a horizontal connecting main pipe are arranged.
Step four: installing 1 and 2 sections of rainsheds:
in the skylight (1: 30-4: 30), a 400t crawler crane is used for hoisting blocks and a middle connecting rod from two ends to the middle, and the blocks and the middle connecting rod are effectively connected with the vertical columns and the horizontal pipes of the canopy in the rail-mounted area.
Step five: installing a 3 rd section of canopy:
and (4) hoisting the main pipe unit in the middle of the rail traveling area by using a 400t crawler crane, and connecting the main pipe unit with the rest units. Meanwhile, another transverse connecting rod for hoisting the main pipe by using another 400t crawler crane is connected with the C1 unit and the main pipe on the platform. And effectively welding and fixing the loose hook of the rear crane, and then hoisting the A9 connecting rod. And after all the sections are welded, symmetrically hoisting each section unit in the middle of the rail traveling area by using two 400t crawler cranes.
Step six: installing 1 and 2 sections of rainshed cornices:
a400 t crawler crane is used for sequentially mounting a canopy roof in the west 1 area and a canopy roof in the east 1 area in the east west area respectively. And then the cornice structures on the east and west sides of the rail area are sequentially arranged.
Step seven: the construction of the canopy column and the 4 th and 5 th sections of the canopy in the mounting platform region:
and (3) installing canopy columns in east and west platform areas, and installing a canopy supporting jig frame and a canopy structure by using a 300t truck crane, a 400t crawler crane and the like in a matching manner. The installation sequence is sequential installation.
Step eight: demolish canopy construction bed-jig and interim support:
after the whole erection welding of roofing structure is accomplished, demolish canopy installation bed-jig, demolish the order: from the trackside area to the east-west side.
Step nine: build the lighting fixture and support, excessive existing lighting fixture:
in a skylight point (1: 30-4: 30), a lamp bracket support is built on an existing platform, and equipment such as a dynamic lighting lamp, a guide mark, weak current system terminal equipment and a power distribution line pipe thereof are moved to a newly-built support through an existing canopy steel truss.
Step ten: dismantling the existing canopy and the module trolley:
in the skylight point (1: 30-4: 30), roof tiles and connection rods between canopy hoisting sections are manually dismantled, the sections are hoisted by using a module trolley and run to an extension platform, and then the sections are hoisted to the ground by using a 400t crawler crane for disassembly. Steel canopy demolition schedule 45 d.
Claims (10)
1. A reconstruction method of a station canopy is characterized by comprising the following steps: set up the platform truck track and assemble the module platform truck in old canopy both sides, it is fixed to walk to preset position after carrying on newly-built canopy unit at every module platform truck top, changes the newly-built canopy unit on the module platform truck and supports by the support post, and a plurality of module platform trucks splice is the protective structure of a tunnel type, and the old canopy of new canopy installation partition after finishing, utilizes the module platform truck to transport the old canopy unit of partition one by one outside newly-built canopy scope.
2. A reconstruction method of a station canopy according to claim 1, characterized in that: and (3) building extension platforms at two ends of the old canopy as the areas for assembling and hoisting the module trolleys and hoisting new and old canopy units, and connecting the two extension platforms by trolley tracks arranged on two sides of the old canopy.
3. A reconstruction method of a station canopy according to claim 2, characterized in that: the newly-built canopy is in a cross star shape and is divided into five parts, namely a left part, a middle part, a right part, an upper part and a lower part, wherein the canopy parts at two ends of the track are firstly installed, the canopy at the middle part is installed, and finally the canopy at two sides of the track is installed.
4. A reconstruction method of a station canopy according to claim 3, characterized in that: adopting a large crawler crane to install the extension platform, and the installation steps are as follows: the method comprises the following steps of strip foundation construction, hoisting and mounting of the steel pipe column, the longitudinal beam and the connecting system, mounting of the Bailey beam, and mounting of the distribution beam and the track.
5. A reconstruction method of a station canopy according to claim 4, characterized in that: and after the installation of the extension platform and the trolley track is finished, the module trolley with the assembled main body structure is hung to the extension platform, and the installation of the panel and the protective structure of the trolley is finished on the extension platform.
6. A reconstruction method of a station canopy according to claim 5, characterized in that: after the installation of the extension platform and the trolley track is finished, the installation of the newly-built canopy column and the support is carried out, and the installation process is as follows: binding and hoisting the steel column, temporarily aligning and fixing the steel column, and formally installing the steel beam.
7. A reconstruction method of a station canopy according to claim 6, characterized in that: the method comprises the steps of firstly installing a framework structure of a new canopy, firstly installing a canopy framework in the middle according to the framework structures of the new canopy at two ends of a rail, and finally installing the canopy frameworks at two sides of the rail in a retreating mode from one side close to the rail to the direction far away from the rail.
8. A reconstruction method of a station canopy according to claim 7, characterized in that: and after the new canopy framework is installed, installing a panel and a decorative part of the new canopy.
9. A reconstruction method of a station canopy according to claim 8, characterized in that: and after the new canopy is installed, the old canopy is disassembled by using the skylight time, the disassembled old canopy unit is hung below the module trolley, and the old canopy unit travels together with the module trolley to the extension platform to be hung away.
10. A reconstruction method of a station canopy according to claim 9, characterized in that: when the old rainshed is dismantled, the rainshed plates are firstly dismantled, the rainshed plates are placed to the side face of the platform or the top of the module trolley through transmission, then steel beams of the old rainshed units to be dismantled are fixed on the electric hoists of the corresponding module trolley, finally the connection relations of the old rainshed units to be dismantled are cut, and the old rainshed units are conveyed to the extension platform by the module trolley and are lifted away together.
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| CN202110592064.5A CN113833292A (en) | 2021-05-28 | 2021-05-28 | Reconstruction method of station canopy |
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| CN202110592064.5A CN113833292A (en) | 2021-05-28 | 2021-05-28 | Reconstruction method of station canopy |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114250997A (en) * | 2021-12-31 | 2022-03-29 | 中铁五局集团有限公司 | Construction method of platform steel structure main body of traffic junction |
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| CN112727134A (en) * | 2020-12-10 | 2021-04-30 | 中铁五局集团建筑工程有限责任公司 | Construction method for rebuilding and expanding main structure of existing overhead operation subway station building |
| CN112727132A (en) * | 2020-12-10 | 2021-04-30 | 中铁五局集团建筑工程有限责任公司 | Method for dismantling existing canopy of overhead operation subway station |
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2021
- 2021-05-28 CN CN202110592064.5A patent/CN113833292A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060180799A1 (en) * | 2004-09-30 | 2006-08-17 | John Rannikko | Carpet removal system and method |
| CN206591862U (en) * | 2017-03-03 | 2017-10-27 | 广东省重工建筑设计院有限公司 | A kind of subway overhead station construction protecting platform car |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114250997A (en) * | 2021-12-31 | 2022-03-29 | 中铁五局集团有限公司 | Construction method of platform steel structure main body of traffic junction |
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Application publication date: 20211224 |