CN116658228A - Operation ventilation switching structure of two adjacent new and old subway stations and construction method thereof - Google Patents
Operation ventilation switching structure of two adjacent new and old subway stations and construction method thereof Download PDFInfo
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- CN116658228A CN116658228A CN202310510064.5A CN202310510064A CN116658228A CN 116658228 A CN116658228 A CN 116658228A CN 202310510064 A CN202310510064 A CN 202310510064A CN 116658228 A CN116658228 A CN 116658228A
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- 238000009423 ventilation Methods 0.000 title claims abstract description 55
- 238000010276 construction Methods 0.000 title claims abstract description 49
- 230000003584 silencer Effects 0.000 claims abstract description 19
- 210000001503 joint Anatomy 0.000 claims abstract description 9
- 238000006243 chemical reaction Methods 0.000 claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 283
- 239000010959 steel Substances 0.000 claims description 283
- 239000004567 concrete Substances 0.000 claims description 57
- 238000005096 rolling process Methods 0.000 claims description 29
- 238000003466 welding Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 10
- 238000009412 basement excavation Methods 0.000 claims description 8
- 230000005484 gravity Effects 0.000 claims description 8
- 239000010960 cold rolled steel Substances 0.000 claims description 6
- 239000000725 suspension Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000013461 design Methods 0.000 claims description 5
- 239000011150 reinforced concrete Substances 0.000 claims description 4
- 230000009466 transformation Effects 0.000 claims description 4
- 239000002699 waste material Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 238000009420 retrofitting Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/003—Ventilation of traffic tunnels
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/04—Air ducts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/08—Ventilation arrangements in connection with air ducts, e.g. arrangements for mounting ventilators
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
- Ventilation (AREA)
Abstract
The invention discloses an operation ventilation conversion structure of two adjacent new and old subway stations and a construction method thereof, which relate to the technical field of subway engineering and are applied to an air duct of an air pavilion, wherein the operation ventilation conversion structure of two adjacent new and old subway stations comprises an old station structure range ventilation structure and a new station structure range ventilation structure, and the operation ventilation conversion structure comprises the following steps: the ventilation structure of the old vehicle station structure range sequentially comprises a newly-built combined air valve, an air duct silencer and a fan according to the front-back direction of air flow of an air duct of the air booth; the novel vehicle station structure range ventilation structure comprises an L-shaped rectangular air pipe; one end of the L-shaped rectangular air pipe is in butt joint with the fan, and the upper part of the other end of the L-shaped rectangular air pipe is connected with the ground. The device provided by the invention reserves the ventilation function of the existing wind pavilion air duct of the old station, and solves the problem that the existing wind pavilion structure of the old station occupies the construction operation space of the new station, so that the construction difficulty of the new station in the section is high.
Description
Technical Field
The invention relates to the technical field of subway engineering, in particular to an operation ventilation switching structure of two adjacent new and old subway stations and a construction method thereof.
Background
The underground station is generally provided with a certain number of wind kiosks at two ends of the station, so that the air environment in the subway meets the psychological and physiological requirements of personnel and the normal running requirements of equipment, and the normal operation of the station is ensured; however, when a multi-line transfer station is built, particularly when a newly built station is adjacent to an existing old station, the problem that the existing old station wind pavilion structure occupies the construction operation space of the new station and the construction difficulty of the new station in the section is high inevitably occurs. The common method is to construct a temporary air duct, break and reconstruct the original structure bottom plate of the air duct of the existing air duct, and reserve the rest structures of the existing air duct, and construct a new car station structure under the bottom plate of the air duct by using a vertical column and a cover in the construction of the air duct. However, the existing wind pavilion structure needs to be protected in the construction process of the method, and the old vehicle station needs to be entered for a long time to break in the construction process, so that great construction influence can be generated on the operation of the old vehicle station. In addition, the method has the defects of long construction period, large potential safety hazards in construction, high cost and the like.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention provides an operation ventilation conversion structure of two adjacent new and old subway stations and a construction method thereof, which reserve the ventilation function of the existing wind pavilion air channel of the old station and overcome the problem that the existing wind pavilion structure of the old station occupies the construction operation space of the new station, so that the construction difficulty of the new station in the section is high.
In order to achieve the above object, the present invention has the following technical scheme:
two adjacent new old subway station operation ventilation conversion structures are applied to the wind pavilion wind channel, including old station structural range ventilation structure and new car station structural range ventilation structure, wherein:
the ventilation structure of the old vehicle station structure range sequentially comprises a newly-built combined air valve, an air duct silencer and a fan according to the front-back direction of air flow of an air duct of the air booth;
the novel vehicle station structure range ventilation structure comprises an L-shaped rectangular air pipe;
one end of the L-shaped rectangular air pipe is in butt joint with the fan, and the upper part of the other end of the L-shaped rectangular air pipe is connected with the ground.
Further, L type rectangle tuber pipe includes L type rectangle tuber pipe body and automatic drainage valve, wherein:
the top end of the L-shaped rectangular air pipe body is closed, and a through hole is formed in the side surface of the upper part of the L-shaped rectangular air pipe body;
the automatic drainage valve is arranged at the bottom of the L-shaped rectangular air pipe body.
Further, the L-shaped rectangular air pipe further comprises:
the automatic shutter is arranged on the outer side surface of the through hole of the L-shaped rectangular air pipe body;
the rainfall sensor is arranged on the outer side of the top end of the L-shaped rectangular air pipe body and is connected with the controller of the automatic shutter.
Further, the L-shaped rectangular air pipe body is made of cold-rolled steel plates prefabricated in a blocking mode, and the cold-rolled steel plates are spliced in an inner flange connection mode.
Further, the ventilation structure of the new vehicle station structure range further comprises a hoisting device and a concrete supporting beam, and the L-shaped rectangular air pipe is arranged on the concrete supporting beam through the hoisting device.
Further, the hoist device includes:
the middle structure comprises two sets of first double-spliced I-steel and two first I-steel, the two sets of first double-spliced I-steel are respectively arranged on the front side and the rear side of the L-shaped rectangular air pipe, and the two ends of the two first I-steel are arranged on the two sets of first double-spliced I-steel and are respectively arranged on the left side and the right side of the L-shaped rectangular air pipe;
the bottom structure comprises two sets of second double-spliced I-steel, a plurality of second I-steel and a steel plate hinged support table, wherein the two sets of second double-spliced I-steel are respectively arranged on the left side and the right side of the L-shaped rectangular air pipe along the longitudinal direction of the concrete supporting beam, the second I-steel is transversely arranged on the two sets of second double-spliced I-steel, the steel plate hinged support table is transversely arranged on an air duct port bottom plate of an existing air pavilion in the structural range of an old vehicle station, and one end of each of the two sets of second double-spliced I-steel is respectively hinged with the steel plate hinged support table;
the finish rolling deformed steel bar suspender is provided with a plurality of rows from front to back, and the lower end, the middle part and the upper end of the finish rolling deformed steel bar suspender are respectively fixedly connected with the second double-spliced I-steel, the first double-spliced I-steel and the concrete supporting beam through a steel base plate and a threaded sleeve.
Further, the lifting device further comprises:
the top structure comprises a set of third double-spliced I-steel which is transversely arranged on the two concrete supporting beams and is positioned at the rear side of the L-shaped rectangular air pipe;
the bottom structure is further provided with a set of second double-spliced I-steel in the middle of the two sets of second double-spliced I-steel, and the middle second double-spliced I-steel and the third double-spliced I-steel are fixedly connected with the finish rolling deformed steel bar suspender through a steel backing plate and a threaded sleeve respectively.
Further, the finish rolling deformed steel bar suspender is fixedly connected with the concrete supporting beam and the third double-spliced I-steel through two steel backing plates, and an annular dynamometer is arranged between the two steel backing plates.
Further, the air conditioner also comprises equilateral angle steel, wherein the equilateral angle steel is arranged at the left side, the right side and the rear side of the L-shaped rectangular air pipe and is sheared
The invention also provides a construction method of the operation ventilation switching structure of two adjacent new and old subway stations, which is characterized in that: the method comprises the following steps:
step 1, air duct equipment transformation and building envelope construction: constructing an enclosure structure of the foundation pit excavation of the new car station, reserving a fan, removing a fan silencer and an air duct waste pipe which are positioned in the structure range of the new car station, and moving the air duct silencer from the rear end of the fan to the front end of the fan; pouring a new reinforced concrete wall at the air inlet end of the air duct silencer, installing a fireproof door and a tunnel air valve to form a newly-built combined air valve, and removing the original combined air valve positioned in the structural range of the new station; the building method comprises the following steps of constructing an enclosure structure of foundation pit excavation of a new station, wherein the enclosure structure comprises a concrete supporting beam, brackets, temporary stand columns, underground continuous walls, connecting beams and crown beams;
step 2, forming a wind hole: slope excavation is carried out on the range of the top plate of the air duct of the existing air pavilion, a supporting system is erected in the air duct of the existing air pavilion, air holes are formed in the top plate of the air duct of the existing air pavilion in the structural range of the new vehicle station, and the number and the size of the air holes are determined according to the arrangement of the existing air pavilion groups;
step 3, installing a bottom structure of the lifting device: a steel plate hinged support table is transversely arranged on a top plate of an air duct port of an existing air duct in the structural range 200 of an old station, second double-spliced I-steel plates are longitudinally arranged at two ends and the middle part of the bottom of the air duct port along a concrete supporting beam and serve as main ribs of a bottom structure, one end of each main rib is hinged on the steel plate hinged support table through pins, the other parts of each main rib are welded on a steel base plate, a threaded sleeve is fixed below the main rib, the second I-steel plates are suspended through finish-rolled threaded steel suspenders, the second I-steel plates are transversely and equidistantly welded on the upper surfaces of the second double-spliced I-steel plates to serve as secondary ribs, loads applied by L-shaped rectangular air ducts are transmitted, and the bottom plate of the air duct needs to be perforated in advance before the second double-spliced I-steel plates are installed, so that construction of bottom hanging interfaces of the second double-spliced I-steel plates is facilitated;
step 4, installing a top structure of the lifting device: welding steel backing plates on the lower surfaces of two ends of a third double-spliced I-steel (63), welding steel backing plates on the upper surfaces of the middle parts, welding steel backing plates on pre-embedded steel plates on the surfaces of concrete supporting beams, transversely installing the third double-spliced I-steel on the two concrete supporting beams, aligning the steel backing plates welded on the lower surfaces of the two ends of the third double-spliced I-steel with the steel backing plates welded on the pre-embedded steel plates on the surfaces of the concrete supporting beams, and arranging an annular dynamometer between the aligned two steel backing plates;
step 5, connecting the bottom structure and the top of the hoisting device: finish rolling deformed steel bar suspender is worn down perpendicularly from top structure and concrete supporting beam, through steel backing plate and screw sleeve lower extreme and second double-spliced I-steel fixed connection, upper end and concrete supporting beam or third double-spliced I-steel fixed connection, wherein: before a suspension rod hole reserved by a finish rolling screw-thread steel suspension rod from a concrete supporting beam vertically passes through a gap of a second double-spliced I-steel at the bottom and a reserved hole of a steel base plate, a steel base plate and a screw-thread sleeve with middle structures are reserved; the finish rolling deformed steel bar suspender is fixedly connected with the third double-spliced I-steel or the concrete supporting beam through two steel backing plates, and an annular dynamometer is arranged between the two steel backing plates;
step 6, installing an L-shaped rectangular air pipe: after the horizontal section of the L-shaped rectangular air pipe is installed, a safety protection net is arranged in the L-shaped rectangular air pipe, and then the L-shaped air pipe of the vertical section is installed;
step 7, installing a middle structure of the lifting device: arranging the first double-spliced I-steel on the front and rear sides of the L-shaped rectangular air pipe along the transverse seam of the concrete supporting beam, welding the first double-spliced I-steel on the steel backing plate reserved in the step 5, fixing a hanging joint through a threaded sleeve, and simultaneously welding a single first I-steel (601) on the upper surfaces of the first double-spliced I-steel on the two sides of the L-shaped rectangular air pipe along the longitudinal direction of the concrete supporting beam respectively;
step 8, fixing equilateral angle steel: welding equilateral angle steel on I-steel of a middle structure and a bottom structure by adopting a scissors design at two sides and the rear side of the L-shaped rectangular air pipe, and sealing the top angle steel at the same time;
step 9, debugging an operation ventilation system;
step 10, dismantling the old station wind booth structure: excavating earthwork outside the range of the old station wind pavilion structure, and synchronously dismantling the old station wind pavilion structure;
step 11, adjusting the gravity center of the L-shaped rectangular air pipe: respectively arranging gate frame jacks at hanging joints at two ends of the third double-spliced I-steel, fixing top caps of the gate frame jacks at the heads of finish-rolling screw steel hanging rods, controlling the gate frame jacks to respectively lift or lower the heights of the finish-rolling screw steel hanging rods at the hanging joints at two ends of the third double-spliced I-steel through jack adjusting motors so as to adjust the gravity centers of L-shaped rectangular air pipes, and sequentially using the gate frame jacks to adjust the heights of other finish-rolling screw steel hanging rods 7 so that the structure reaches an optimal stable state;
and 12, constructing the rest main body structures of the new station structure range, and dismantling the hoisting device after the structure construction is finished.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention uses the L-shaped rectangular air pipe to replace the existing air pavilion air channel in the structure range of the new station, skillfully converts the operation ventilation structure of the old station, so that the influence on the existing ventilation structure of the old station can be reduced during the construction period of the new station, and meanwhile, the ventilation function of the existing air pavilion air channel of the old station can be successfully reserved without influencing the normal operation of the old station under the factors of small site, wide profession, multiple programs and the like in the construction process.
According to the invention, the L-shaped rectangular air pipe is used for replacing the existing air pavilion air channel positioned in the structural range of the new station, and after the existing air pavilion air channel is broken, a construction space is vacated for the new station, so that the construction difficulty of the new station in the section is greatly reduced, the construction cost is reduced, and the construction period is shortened.
The air duct hoisting device adopts a large number of assembly type components, and is directly assembled on site during construction, so that the construction efficiency is greatly improved, and the construction safety is ensured.
The air duct lifting device solves the technical problem of independent suspension of the L-shaped rectangular air duct device, adopts an independent suspension system to suspend the L-shaped rectangular air duct, and solves the problems of small occupied space and economical feasibility.
Drawings
Fig. 1 is a schematic plan view of a prior art station ventilation unit retrofit according to an embodiment of the present invention.
Fig. 2 is a schematic plan view of an operation ventilation switching structure according to an embodiment of the present invention.
Fig. 3 is a three-dimensional schematic diagram of an L-shaped rectangular duct according to an embodiment of the invention.
Fig. 4 is a schematic structural diagram of a middle part of a lifting device according to an embodiment of the invention.
Fig. 5 is a schematic structural diagram of a bottom structure of a lifting device according to an embodiment of the invention.
Fig. 6 is a schematic view of a bottom structure hinge opening of a lifting device according to an embodiment of the invention.
Fig. 7 is a schematic structural diagram of a top structure of a lifting device according to an embodiment of the invention.
Fig. 8 is a schematic plan view of an existing station ventilation device after retrofitting in accordance with an embodiment of the present invention.
Fig. 9 is a three-dimensional schematic diagram of a lifting L-shaped rectangular air duct according to an embodiment of the present invention.
FIG. 10 is a schematic cross-sectional view of an opening in a roof of an existing wind booth according to an embodiment of the invention.
FIG. 11 is a schematic plan view of an opening in a roof of an existing wind booth according to an embodiment of the present invention.
FIG. 12 is a schematic view of an embodiment of the present invention for installing a horizontal section L-shaped rectangular duct.
FIG. 13 is a schematic view of an embodiment of the present invention for installing a vertical section L-shaped rectangular duct.
Fig. 14 is a schematic cross-sectional view of an operation ventilation switching structure according to an embodiment of the present invention.
Fig. 15 is a flow chart of a ventilation converting structure according to an embodiment of the present invention.
In the figure, 100-new station structure range, 200-old station structure range, 201-old station main structure, 1-fan, 2-air duct silencer, 3-original combined air valve, 4-new combined air valve, 5-L-shaped rectangular air duct, 51-L-shaped rectangular air duct body, 52-automatic drain valve, 53-automatic shutter, 54-rain sensor, 61-first double-spliced I-steel, 601-first I-steel, 62-second double-spliced I-steel, 602-second I-steel, 63-third double-spliced I-steel, 64-bolt, 65-nut, 66-equilateral angle steel, 7-finish rolling screw steel suspender, 71-steel backing plate, 72-screw sleeve, 73-annular dynamometer, 8-steel plate hinged support table, 81-pin, 9-concrete support beam, 91-bracket, 92-temporary upright, 93-underground continuous wall, 94-connecting beam, 95-crown beam, 96-soil layer, 10-existing air duct, 101-jack motor, 11-top cap, 111-jack-top frame, and 112-jack-adjusting door.
Detailed Description
The present invention is described in further detail below with reference to examples to enable those skilled in the art to practice the same by referring to the description.
It should be noted that the experimental methods described in the following embodiments, unless otherwise specified, are all conventional methods, and the reagents and materials, unless otherwise specified, are all commercially available; in the description of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "disposed" are to be construed broadly, and may be fixedly connected, disposed, or detachably connected, disposed, or integrally connected, disposed, for example. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art. The terms "transverse," "longitudinal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used for convenience in describing and simplifying the description of the present invention based on the orientation or positional relationship shown in the drawings, and do not denote or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present invention.
To describe the technical contents, the achieved objects and effects of the present invention in detail, the following description is made with reference to the embodiments in conjunction with the accompanying drawings.
Examples
As shown in fig. 1, a schematic plan view of an existing old station ventilation device before transformation is shown, the existing old station wind pavilion wind channel structure device comprises a fan 1, a fan silencer 2 and an original combined wind valve 3, a new station needs to be newly built at the adjacent position of the existing old station, and a new station construction operation space is overlapped with the existing old station wind pavilion wind channel structure, namely a new station structure range 200, so that the problem of great construction difficulty of the new station in the section is caused. The following scheme is provided for not affecting the normal operation of the old station and the construction of the new station.
Two adjacent new and old subway station operation ventilation conversion structures are applied to the wind pavilion wind channel, including old car station structure scope 200 ventilation structure and new car station structure scope 100 ventilation structure, wherein:
the ventilation structure of the old vehicle station structure range 200 sequentially comprises a newly-built combined air valve 4, an air duct silencer 2 and a fan 1 according to the front-back direction of air flow of an air duct of the air booth;
the ventilation structure of the new station structure range 100 comprises an L-shaped rectangular air pipe 5;
one end of the L-shaped rectangular air pipe 5 is in butt joint with the fan 1, the upper part of the other end is connected with the ground, the rectangular air pipe 5 is used for replacing the existing new, row, piston and mechanical air channel of the new station structural range 200, and the guide is changed to be connected with the ground.
The construction principle of the invention is as follows:
the fan 1 is reserved in the old station structure range 200; removing the air duct silencer 2 and the air duct waste pipe which are positioned in the new station structure range 100, and moving the air duct silencer 2 from the rear end of the fan 1 to the front end of the fan 1; pouring a new reinforced concrete wall at the air inlet end of the air duct silencer 2, installing a fireproof door and a tunnel air valve to form a newly-built combined air valve 4, and then dismantling the original combined air valve 3 positioned in the structural range 100 of the new station; the air inlet end of the rectangular air pipe 5 is butted with the fan 1, and the air outlet end is butted with the ground. In this way, the newly-built combined air valve 4, the air duct silencer 2, the fan 1 and the rectangular air duct 5 form an air pavilion air duct.
In summary, the device provided by the invention uses the rectangular air pipe 5 to replace the existing air pavilion air channel in the new station structure range 100, skillfully converts the old station operation ventilation structure, so that the influence on the existing ventilation structure can be reduced during the construction period of the adjacent new station, and meanwhile, the ventilation function of the air pavilion can be successfully reserved under the factors of small site, wide profession, multiple programs and the like in the construction process, and the normal operation of the old station is not influenced; the rectangular air pipe is used for replacing the existing air pavilion air channel positioned in the structural range of the new vehicle station, and after the existing air pavilion air channel is broken, a construction space is vacated for the new vehicle station, so that the construction difficulty of the new vehicle station in the section is greatly reduced, the construction cost is reduced, and the construction period is shortened.
In this embodiment, as shown in fig. 3, the L-shaped rectangular air duct 5 includes an L-shaped rectangular air duct body 51 and an automatic water drain valve 52, wherein:
the L-shaped rectangular air duct body 51 is L-shaped, has a rectangular cross section, is closed at the top end, is provided with a through hole at the side surface of the upper part, is provided with a through hole at the rear side surface of the upper part in the embodiment, and can be provided with a through hole at other side surfaces of the upper part in other embodiments;
the automatic water drain valve 52 is arranged at the bottom of the L-shaped rectangular air pipe body 51, and can automatically open the valve to drain water when water enters the L-shaped rectangular air pipe body 51.
The L-shaped rectangular air pipe body 51 is made of cold-rolled steel plates prefabricated in a blocking mode, and the cold-rolled steel plates are spliced in an inner flange connection mode.
Further, the L-shaped rectangular air duct 5 further includes:
an automatic louver 53 disposed on the outer side surface of the through hole of the L-shaped rectangular air duct body 51;
a rainfall sensor 54 which is disposed outside the top end of the L-shaped rectangular duct body 51 and is connected to the controller of the automatic louver 53; the rain sensor 54 provides the rain information to the automatic shutter 53 controller, and the auxiliary automatic shutter 53 controller adjusts the shutter rotation angle of the automatic shutter 53 so as to adjust the shutter rotation angle according to the rain amount, thereby ensuring that the rainy season is not affected by the backward flow of rainwater.
In this embodiment, the ventilation structure of the new station structure range 100 further includes a lifting device and a concrete supporting beam 9, and the L-shaped rectangular air pipe 5 is disposed on the concrete supporting beam 9 through the lifting device.
The hoisting device comprises:
the middle structure comprises two sets of first double-spliced I-steel 61 and two first I-steel 601, wherein the two sets of first double-spliced I-steel 61 are respectively arranged on the front side and the rear side of the L-shaped rectangular air pipe 5, and two ends of the two first I-steel 601 are arranged on the two sets of first double-spliced I-steel 61 and are respectively positioned on the left side and the right side of the L-shaped rectangular air pipe 5, as shown in fig. 4. The middle part structure is responsible for restraining the L-shaped rectangular air pipe 5, and prevents the L-shaped rectangular air pipe 5 from generating larger displacement under the influence of external factors.
The bottom structure comprises two sets of second double-spliced I-steels 62, a plurality of second I-steels 602 and a steel plate hinged support table 8, wherein the two sets of second double-spliced I-steels 62 are respectively arranged on the left side and the right side of an L-shaped rectangular air pipe 5 along the longitudinal direction of a concrete supporting beam 9, the second I-steels 602 are transversely welded on the two sets of second double-spliced I-steels 62 at equal intervals and serve as secondary ribs and are responsible for transferring the load applied by the L-shaped rectangular air pipe 5, the steel plate hinged support table 8 is transversely arranged on an air duct port bottom plate of an existing air pavilion in the structural range 200 of an old vehicle station, the two sets of second double-spliced I-steels 62 are respectively hinged with the steel plate hinged support table 8, and the steel plate hinged support table 8 and the second double-spliced I-steels 62 are hinged together through pins 81 so as to prevent the steel plate hinged support table 8 from falling off on one hand; simultaneously, the second double-spliced I-steel 62 can rotate around the steel plate hinged support table 8 so as to facilitate the lifting of the finish rolling threaded steel suspender 7 by the portal frame jack and adjust the gravity center of the L-shaped rectangular air pipe 5. As shown in fig. 5 and 6.
The finish rolling deformed steel bar suspender 7 is provided with a plurality of rows from front to back, and the lower end, the middle part and the upper end of the finish rolling deformed steel bar suspender 7 are respectively fixedly connected with the second double-spliced I-steel 62, the first double-spliced I-steel 61 and the concrete supporting beam 9 through a steel base plate 71 and a threaded sleeve 72. The finish rolling deformed steel bar suspender 7 vertically penetrates through a suspender hole reserved by the concrete supporting beam 9 and a reserved hole of a steel backing plate 71 and passes through a gap of double-spliced I-steel, and the joint is fixed by a threaded sleeve 72; holes penetrated by the finish rolling deformed steel bar suspenders 7 are reserved in the middle of the steel backing plate 71, the holes are welded on the lower surfaces of the second double-spliced I-steel bars 62 and the first double-spliced I-steel bars 61 or the surface of the embedded steel plates at the hanging joint of the concrete supporting beam 9, the holes are responsible for bearing the vertical acting force exerted by the deformed steel bars 72, the stressed area of the I-steel bars and the concrete supporting beam 9 is increased, and the diameter and the strength of the deformed steel bars 72 are required to be obtained through simulation and inspection according to actual engineering requirements. The lifting device lifts and fixes the L-shaped rectangular air pipe 5 on the concrete supporting beam 9.
As a preferred scheme, the lifting device further comprises:
the top structure comprises a set of third double-spliced I-steel 63, wherein the third double-spliced I-steel 63 is transversely arranged on two concrete supporting beams 9 and is positioned at the rear side of the L-shaped rectangular air pipe 5, as shown in fig. 7.
The bottom structure is further provided with a set of second double-spliced I-steel 62 between the two sets of second double-spliced I-steel 62, the middle second double-spliced I-steel 62 and the third double-spliced I-steel 63 are fixedly connected with the finish-rolled threaded steel suspender 7 through a steel backing plate 71 and a threaded sleeve 72 respectively, as shown in fig. 7, so that the bottom structure is stressed more uniformly, and the load of the second double-spliced I-steel 62 on two sides is reduced.
The steel backing plates 71 are welded on the lower surfaces of two ends of the third double-spliced I-steel 63, and the steel backing plates 71 are welded on the upper surfaces of the I-steel in the middle part, so that the gravity load of the L-shaped rectangular air pipe 5 and the rest structures is transmitted to the concrete supporting beam 9 through the third double-spliced I-steel 63.
The I-steel webs of the first, second and third double-spliced I-steels are reserved with holes, the two I-steels are connected through bolts 64 and nuts 66, the reserved seam is used in double splicing, and the gap between the two double-spliced seams of the two I-steels is larger than the diameter of the finish-rolled deformed steel bar suspender 7.
As a preferable scheme, the finish rolling deformed steel bar suspender 7 is connected with the concrete supporting beam 9 and the third double-spliced I-steel 63 through two steel backing plates 71, and an annular dynamometer 73 is arranged between the two steel backing plates 71, and the annular dynamometer 73 provides axial force data for safety monitoring personnel, so that structural stress uniformity is ensured.
As the preferred scheme, still include equilateral angle steel 66, equilateral angle steel 66 is in L rectangle tuber pipe 5 left and right sides and rear side, adopts the scissors design to set up on hoist device middle part structure and bottom structure's I-steel, and top equilateral angle steel 66 seals simultaneously, reaches reinforced structure's purpose.
As shown in fig. 15, the invention further provides a construction method of the operation ventilation switching structure of two adjacent new and old subway stations, which comprises the following steps:
step 1, air duct equipment transformation and building envelope construction: constructing an enclosure structure of the foundation pit excavation of the new station, reserving a fan 1, removing a fan silencer 2 and an air duct waste pipe which are positioned in the structure range 100 of the new station, and moving the air duct silencer 2 from the rear end of the fan 1 to the front end of the fan 1; and pouring a new reinforced concrete wall at the air inlet end of the air duct silencer 2, installing a fireproof door and a tunnel air valve to form a new combined air valve 4, and removing the original combined air valve 3 positioned in the new station structure range 100, as shown in fig. 8. The building envelope for constructing the foundation pit excavation of the new station comprises a concrete supporting beam 9, a bracket 91, a temporary upright 92, a underground continuous wall 93, a connecting beam 94 and a crown beam 95, wherein the bracket 91 is arranged on an old station main body structure 201, as shown in fig. 9.
Step 2, starting a wind hole: the soil layer 37 is excavated in a slope falling way in the range of the top plate of the existing air pavilion air channel 10, a supporting system is erected in the existing air pavilion air channel 10, a certain number of air holes 101 are formed in the top plate of the existing air pavilion air channel 10 in the range of the new station structure 100 according to the air outlet setting of the existing air pavilion group, as shown in fig. 10, the number and the size of the air holes 101 are determined according to the setting of the existing air pavilion group, in this embodiment, the structure of the existing air pavilion group is provided with a piston air channel, two mechanical air channels, a new air channel and an exhaust air channel, 5 holes are formed in the top plate of the existing air pavilion air channel 10, and the size clearance of the single hole is enlarged by 20cm. After the hole opening of the single hole is finished, installing an L-shaped rectangular air pipe 5, and opening a next air hole 101 after the air pipe is installed, wherein the hole opening sequence is (1) (2) (3) (5) (4), and is shown in fig. 11.
The device for hoisting the air pipe at each air duct opening is the same independent system, and in order to more simply describe the composition and the installation steps of the hoisting device, the embodiment only uses the device for hoisting the air pipe at one air duct opening in the existing air booth group structure for description.
Step 3, installing a bottom structure of the lifting device: a steel plate hinged support table 8 is transversely arranged on a top plate of an air duct port of an existing air duct in the structural range 200 of an old station, second double-spliced I-steel 62 is longitudinally arranged at two ends and the middle part of the bottom of the air duct port along a concrete supporting beam 9 and is used as a main ridge of a bottom structure, one end of the main ridge is hinged on the steel plate hinged support table 8 through a pin 81, the rest of the main ridge is welded on a steel base plate 71, a lower threaded sleeve 72 is fixed, the main ridge is suspended through a finish-rolled threaded steel suspender 7, a certain number of second I-steel 602 are transversely and equidistantly welded on the upper surface of the second double-spliced I-steel 62 according to actual requirements to serve as secondary ridges, and loads applied by an L-shaped rectangular air duct 5 are transmitted, and the bottom plate of the second double-spliced I-steel 62 needs to be perforated in advance before being installed, so that the bottom hanging joint construction of the second double-spliced I-steel 62 is facilitated;
step 4, installing a top structure of the lifting device: the steel backing plates 71 are welded on the lower surfaces of the two ends of the third double-spliced I-steel 63, the steel backing plates 71 are welded on the upper surfaces of the middle parts, the steel backing plates 71 are welded on the embedded steel plates on the surfaces of the concrete supporting beams 9, the third double-spliced I-steel 63 is transversely arranged on the two concrete supporting beams 9, the steel backing plates 71 welded on the lower surfaces of the two ends of the third double-spliced I-steel 63 are aligned with the steel backing plates 71 welded on the embedded steel plates on the surfaces of the concrete supporting beams 9, and the annular dynamometer 73 is arranged between the aligned two steel backing plates 71;
step 5, connecting the bottom structure and the top of the hoisting device: finish rolling deformed steel bar suspender 7 is worn directly down from the third double-spliced I-steel 63 gap of the top structure and suspender Kong Chui reserved by steel backing plate 71 and concrete supporting beam 9, and fixedly connected with second double-spliced I-steel 62 through steel backing plate 71 and threaded sleeve 72, and fixedly connected with concrete supporting beam 9 or third double-spliced I-steel 63 at the upper end, wherein: the finish rolling threaded steel suspenders 7 positioned at four corners of the vertical section of the L-shaped rectangular air pipe are provided with suspender holes reserved from the concrete supporting beam (9), the steel backing plates 71 and the threaded sleeves 72 with middle structures are reserved before the finish rolling threaded steel suspenders 7 vertically penetrate through the gaps of the bottom second double-spliced I-steel 62 and the reserved holes of the steel backing plates 71, and after the finish rolling threaded steel suspenders 7 penetrate into the gaps of the bottom second double-spliced I-steel 62 and the reserved holes of the steel backing plates 71, the suspended joints are fixed through the threaded sleeves 72; the finish rolling screw steel suspender 7 is connected with the concrete supporting beam 9 through two steel backing plates 71, and an annular dynamometer 73 is arranged between the two steel backing plates 71.
Step 6, installing an L-shaped rectangular air pipe: after the horizontal section of the L-shaped rectangular air pipe 5 is installed, a safety protection net is arranged in the L-shaped rectangular air pipe 5, and then the L-shaped rectangular air pipe of the vertical section is installed, as shown in fig. 12 and 13;
step 7, installing a middle structure of the lifting device: arranging the first double-spliced I-steel 61 along the transverse seam of the concrete supporting beam 9 at the front and rear of the L-shaped rectangular air pipe 5, welding the first double-spliced I-steel 61 on a steel backing plate 71 reserved in the step 5, fixing a hanging joint through a threaded sleeve 72, and simultaneously welding a single first I-steel 601 on the upper surfaces of the first double-spliced I-steel 6 at the two sides of the L-shaped rectangular air pipe 5 along the longitudinal direction of the concrete supporting beam 9 respectively to fix the L-shaped rectangular air pipe 5;
step 8, fixing equilateral angle steel: welding equilateral angle steel 7 on I-steel of a middle structure and a bottom structure by adopting a scissors design at two sides and the rear side of the L-shaped rectangular air pipe 5, and sealing and reinforcing the top angle steel;
step 9, debugging an operation ventilation system;
step 10, dismantling the old station wind booth structure: excavating earthwork outside the range of the old station wind pavilion structure, and synchronously dismantling the old station wind pavilion structure;
step 11, adjusting the gravity center of the L-shaped rectangular air pipe: respectively arranging gate frame jacks 11 at hanging interfaces at two ends of the third double-spliced I-steel 63, fixing top caps 111 of the gate frame jacks 11 at the heads of the finish-rolled screw steel hanging rods 7, controlling the gate frame jacks 11 to respectively lift or lower the heights of the finish-rolled screw steel hanging rods 7 at the hanging interfaces at the left end and the right end of the third double-spliced I-steel 63 through jack adjusting motors 112, so as to adjust the gravity centers of the L-shaped rectangular air pipes 5, and sequentially using the gate frame jacks 11 to adjust the heights of other finish-rolled screw steel hanging rods 7 to ensure that the structure reaches an optimal stable state;
and 12, constructing the rest main body structures of the new station structure range 100, and dismantling the hoisting device after the structure construction is finished. The result of the engineering construction is shown in fig. 14.
While the invention has been described in detail with respect to specific embodiments thereof, it will be apparent to those skilled in the art that various modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the invention and are intended to be within the scope of the invention as claimed.
Claims (10)
1. Two adjacent new old subway station operation ventilation conversion structures are applied to the wind pavilion wind channel, its characterized in that includes old station structure scope (200) ventilation structure and new car station structure scope (100) ventilation structure, wherein:
the ventilation structure of the old vehicle station structure range (200) sequentially comprises a newly-built combined air valve (4), an air duct silencer (2) and a fan (1) according to the front-back direction of air flow of an air duct of the air booth;
the ventilation structure of the new vehicle station structure range (100) comprises an L-shaped rectangular air pipe (5);
one end of the L-shaped rectangular air pipe (5) is in butt joint with the fan (1), and the upper part of the other end of the L-shaped rectangular air pipe is connected with the ground.
2. The structure for switching between operation ventilation of two new and old subway stations according to claim 1, wherein the L-shaped rectangular air duct (5) comprises an L-shaped rectangular air duct body (51) and an automatic water drain valve (52), wherein:
the L-shaped rectangular air pipe body (51) is closed at the top end, and a through hole is formed in the side face of the upper part of the L-shaped rectangular air pipe body;
and the automatic water draining valve (52) is arranged at the bottom of the L-shaped rectangular air pipe body (51).
3. The structure according to claim 2, wherein the L-shaped rectangular duct (5) further comprises:
the automatic shutter (53) is arranged on the outer side surface of the through hole of the L-shaped rectangular air pipe body (51);
and a rainfall sensor (54) which is arranged outside the top end of the L-shaped rectangular air pipe body (51) and is connected with a controller of the automatic shutter (53).
4. The ventilation switching structure for operation of two adjacent new and old subway stations according to claim 2, wherein the L-shaped rectangular air pipe body (51) is made of cold-rolled steel plates prefabricated in a partitioned mode, and the cold-rolled steel plates are spliced in an inner flange connection mode.
5. The operation ventilation switching structure of two adjacent new and old subway stations according to claim 1, wherein the ventilation structure of the new station structure range (100) further comprises a hoisting device and a concrete support beam (9), and the L-shaped rectangular air pipe (5) is arranged on the concrete support beam (9) through the hoisting device.
6. The structure for switching operation ventilation of two adjacent new and old subway stations according to claim 5, wherein the hoisting device comprises:
the middle structure comprises two sets of first double-spliced I-steel (61) and two first I-steel (601), wherein the two sets of first double-spliced I-steel (61) are respectively arranged on the front side and the rear side of the L-shaped rectangular air pipe (5), and two ends of the two first I-steel (601) are arranged on the two sets of first double-spliced I-steel (61) and are respectively positioned on the left side and the right side of the L-shaped rectangular air pipe (5);
the bottom structure comprises two sets of second double-spliced I-steels (62), a plurality of second I-steels (602) and a steel plate hinged support table (8), wherein the two sets of second double-spliced I-steels (62) are respectively arranged on the left side and the right side of an L-shaped rectangular air pipe (5) along the longitudinal direction of a concrete supporting beam (9), the second I-steels (602) are transversely arranged on the two sets of second double-spliced I-steels (62), the steel plate hinged support table (8) is transversely arranged on an air duct port bottom plate of an existing air pavilion in the old vehicle station structure range (200), and one ends of the two sets of second double-spliced I-steels (62) are respectively hinged with the steel plate hinged support table (8);
the finish rolling deformed steel bar suspender (7) is provided with a plurality of rows from front to back, and the lower end, the middle part and the upper end of the finish rolling deformed steel bar suspender (7) are respectively fixedly connected with the second double-spliced I-steel bar (62), the first double-spliced I-steel bar (61) and the concrete supporting beam (9) through a steel base plate (71) and a threaded sleeve (72).
7. The structure according to claim 6, wherein the hoisting device further comprises:
the top structure comprises a set of third double-spliced I-steel (63), and the third double-spliced I-steel (63) is transversely arranged on two concrete supporting beams (9) and is positioned at the rear side of the L-shaped rectangular air pipe (5);
the bottom structure is characterized in that a set of second double-spliced I-steel (62) is further arranged between the two sets of second double-spliced I-steel (62), and the middle second double-spliced I-steel (62) and the third double-spliced I-steel (63) are fixedly connected with the finish-rolled threaded steel suspender (7) through a steel base plate (71) and a threaded sleeve (72) respectively.
8. The operation ventilation switching structure of two adjacent new and old subway stations according to claim 6 or 7, characterized in that the finish rolling threaded steel suspender (7) is fixedly connected with the concrete supporting beam (9) and the third double-spliced I-steel (63) through two steel backing plates (71), and an annular dynamometer (73) is arranged between the two steel backing plates (71).
9. The operation ventilation switching structure of two adjacent new and old subway stations according to claim 6, further comprising equilateral angle steel (66), wherein the equilateral angle steel (66) is arranged on the I-steel of the middle structure and the bottom structure of the lifting device in a scissor design on the left side, the right side and the rear side of the L-shaped rectangular air pipe (5), and the top equilateral angle steel (66) is sealed.
10. A construction method of an operation ventilation switching structure of two adjacent new and old subway stations according to any one of claims 1 to 9, which is characterized in that: the method comprises the following steps:
step 1, air duct equipment transformation and building envelope construction: constructing an enclosure structure of the foundation pit excavation of the new station, reserving a fan (1), removing a fan silencer (2) and an air duct waste pipe which are positioned in the structure range (100) of the new station, and moving the air duct silencer (2) from the rear end of the fan (1) to the front end of the fan (1); pouring a new reinforced concrete wall at the air inlet end of the air duct silencer (2), installing a fireproof door and a tunnel air valve to form a new combined air valve (4), and removing the original combined air valve (3) positioned in the structural range (100) of the new station; the building support structure for constructing the foundation pit excavation of the new station comprises a concrete support beam (9), brackets (91), temporary stand columns (92), underground continuous walls (93), connecting beams (94) and crown beams (95);
step 2, forming a wind hole: slope excavation is carried out in the range of the top plate of the existing air pavilion air channel (10), a supporting system is erected in the existing air pavilion air channel (10), air holes (101) are formed in the top plate of the existing air pavilion air channel (10) in the new station structure range (100), and the number and the size of the air holes (101) are set according to the arrangement of the existing air pavilion groups;
step 3, installing a bottom structure of the lifting device: a steel plate hinged support table (8) is transversely arranged on an air duct port top plate of an existing air duct in the old station structural range 200, second double-spliced I-steel (62) is longitudinally arranged at two ends and the middle part of the bottom of the air duct port along a concrete supporting beam (9) and is used as a main ridge of a bottom structure, one end of the main ridge is hinged on the steel plate hinged support table (8) through a pin (81), the rest is welded on a steel base plate (71), a lower threaded sleeve (72) is fixed, the main ridge is suspended through a finish rolling threaded steel suspender (7), second I-steel (602) is transversely and equidistantly welded on the upper surface of the second double-spliced I-steel (62) to serve as secondary ridges, and loads applied by an L-shaped rectangular air duct (5) are transmitted, and the bottom plate of the second double-spliced I-steel (62) needs to be perforated in advance before being installed, so that the construction of a bottom hanging interface of the second double-spliced I-steel (62) is facilitated;
step 4, installing a top structure of the lifting device: welding steel backing plates (71) on the lower surfaces of two ends of the third double-spliced I-steel (63), welding steel backing plates (71) on the upper surface of the middle part, welding steel backing plates (71) on the embedded steel plates on the surfaces of the concrete supporting beams (9), transversely installing the third double-spliced I-steel (63) on the two concrete supporting beams (9), welding the steel backing plates (71) on the lower surfaces of two ends of the third double-spliced I-steel (63) to be aligned with the steel backing plates (71) on the embedded steel plates on the surfaces of the concrete supporting beams (9), and arranging an annular dynamometer (73) between the aligned two steel backing plates (71);
step 5, connecting the bottom structure and the top of the hoisting device: finish rolling screw steel jib (7) are worn down perpendicularly from top structure and concrete supporting beam (9), through steel backing plate (71) and screw sleeve (72) lower extreme and second double-spliced I-steel (62) fixed connection, upper end and concrete supporting beam (9) or third double-spliced I-steel (63) fixed connection, wherein: before a suspension rod hole reserved by a finish rolling screw-thread steel suspension rod (7) from a concrete supporting beam (9) vertically passes through a gap of a bottom second double-spliced I-steel (62) and a reserved hole of a steel base plate (71), a steel base plate (71) with a middle structure and a screw sleeve (72) are reserved; the finish rolling screw thread steel suspender (7) is fixedly connected with the third double-spliced I-steel (63) or the concrete supporting beam (9) through two steel backing plates (71), and an annular dynamometer (73) is arranged between the two steel backing plates (71);
step 6, installing an L-shaped rectangular air pipe: after the horizontal section of the L-shaped rectangular air pipe (5) is installed, a safety protection net is arranged in the L-shaped rectangular air pipe (5), and then the L-shaped rectangular air pipe of the vertical section is installed (5);
step 7, installing a middle structure of the lifting device: arranging the first double-spliced I-steel (61) along the transverse seam of the concrete supporting beam (9) on the front and rear sides of the L-shaped rectangular air pipe (5), welding the first double-spliced I-steel on a steel backing plate (71) reserved in the step 5, fixing a hanging joint through a threaded sleeve (72), and simultaneously welding a single first I-steel (601) on the upper surfaces of the first double-spliced I-steel (61) on the two sides of the L-shaped rectangular air pipe (5) along the longitudinal direction of the concrete supporting beam (9) respectively;
step 8, fixing equilateral angle steel: welding equilateral angle steel (7) on I-steel of a middle structure and a bottom structure by adopting a scissors design at two sides and the rear side of the L-shaped rectangular air pipe (5), and sealing the top angle steel at the same time;
step 9, debugging an operation ventilation system;
step 10, dismantling the old station wind booth structure: excavating earthwork outside the range of the old station wind pavilion structure, and synchronously dismantling the old station wind pavilion structure;
step 11, adjusting the gravity center of the L-shaped rectangular air pipe: respectively arranging gate frame jacks (11) at hanging joints at two ends of the third double-spliced I-steel (63), fixing top caps (111) of the gate frame jacks (11) at the heads of the finish-rolled screw steel hanging rods (7), controlling the gate frame jacks (11) to respectively lift or lower the heights of the finish-rolled screw steel hanging rods (7) at hanging joints at two ends of the third double-spliced I-steel (63) through jack adjusting motors (112), so as to adjust the gravity centers of the L-shaped rectangular air pipes (5), and sequentially adjusting the heights of other finish-rolled screw steel hanging rods (7) through the gate frame jacks (11), so that the structure reaches an optimal stable state;
and 12, constructing the rest main body structures of the new station structure range (100), and dismantling the hoisting device after the structure construction is finished.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN213016423U (en) * | 2020-03-04 | 2021-04-20 | 广州地铁设计研究院股份有限公司 | Subway station rail top air duct combined with middle plate |
| CN112880089A (en) * | 2021-01-15 | 2021-06-01 | 郑州地铁集团有限公司 | Subway station ground wind pavilion for rail transit |
| CN114908799A (en) * | 2022-05-11 | 2022-08-16 | 广州地铁设计研究院股份有限公司 | Be applicable to newly-built or rebuild rail top wind channel assembled structure of subway station |
| CN115059998A (en) * | 2022-07-11 | 2022-09-16 | 青岛市地铁规划设计院有限公司 | Adjustable platform door ventilation air-conditioning system of subway station no-piston air shaft |
| CN115560407A (en) * | 2022-10-14 | 2023-01-03 | 中铁第六勘察设计院集团有限公司 | Public area ventilation air-conditioning system with machine room arranged in middle of subway station |
-
2023
- 2023-05-08 CN CN202310510064.5A patent/CN116658228B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN213016423U (en) * | 2020-03-04 | 2021-04-20 | 广州地铁设计研究院股份有限公司 | Subway station rail top air duct combined with middle plate |
| CN112880089A (en) * | 2021-01-15 | 2021-06-01 | 郑州地铁集团有限公司 | Subway station ground wind pavilion for rail transit |
| CN114908799A (en) * | 2022-05-11 | 2022-08-16 | 广州地铁设计研究院股份有限公司 | Be applicable to newly-built or rebuild rail top wind channel assembled structure of subway station |
| CN115059998A (en) * | 2022-07-11 | 2022-09-16 | 青岛市地铁规划设计院有限公司 | Adjustable platform door ventilation air-conditioning system of subway station no-piston air shaft |
| CN115560407A (en) * | 2022-10-14 | 2023-01-03 | 中铁第六勘察设计院集团有限公司 | Public area ventilation air-conditioning system with machine room arranged in middle of subway station |
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