CN221144424U - Middle wind shaft structure of subway tunnel - Google Patents
Middle wind shaft structure of subway tunnel Download PDFInfo
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- CN221144424U CN221144424U CN202322711509.4U CN202322711509U CN221144424U CN 221144424 U CN221144424 U CN 221144424U CN 202322711509 U CN202322711509 U CN 202322711509U CN 221144424 U CN221144424 U CN 221144424U
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- 238000009423 ventilation Methods 0.000 claims abstract description 57
- 238000000034 method Methods 0.000 claims abstract description 8
- 230000008569 process Effects 0.000 claims abstract description 8
- 238000009933 burial Methods 0.000 claims description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 238000004088 simulation Methods 0.000 claims description 5
- 238000005399 mechanical ventilation Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 25
- 238000005516 engineering process Methods 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 3
- 238000010297 mechanical methods and process Methods 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
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Abstract
The utility model discloses a middle air shaft structure of a subway tunnel, which comprises a main body structure for placing a layer of underground air blower, a vertical air duct constructed by adopting a vertical jacking process or a vertical jacking process, and an auxiliary structure which is arranged right above the tunnel and laid along the central line of the tunnel, wherein the main body structure is a structure with a plurality of layers of underground air blower; the main body structure is positioned above the areas of the left line tunnel and the right line tunnel, and comprises a square body structure consisting of an interval air shaft top plate, an interval air shaft bottom plate and an interval air shaft side wall, wherein the inside of the main body structure is divided into a stair area and a ventilation area according to functions; the ventilation area comprises an equipment area and a ventilation channel, two piston air shafts are arranged in the ventilation channel, and the top ends of the piston air shafts are higher than the ground; the horizontal piston air duct and the horizontal mechanical air duct are vertically provided with a plurality of vertical air ducts, and the vertical air ducts are communicated with the left line tunnel and the right line tunnel. The utility model can achieve independent construction of the shield tunnel and the interval wind shaft and avoid delay of construction period.
Description
Technical Field
The utility model belongs to the technical field of subway ventilation and smoke discharge structures, and particularly relates to a middle air shaft structure of a subway tunnel.
Background
In urban subway construction, for the interval with longer tunnel and larger driving density between two stations, an intermediate air shaft is generally required to be arranged so as to meet the functions of ventilation and cooling, pressure relief and drag reduction of the interval tunnel and fire smoke discharge. In the prior art, an interval wind well is generally an underground two-layer or underground multi-layer structure, an enclosure structure is firstly constructed in engineering, and after a foundation pit is excavated to a designed elevation, main structures such as a bottom plate, a side wall, a middle plate, a top plate and the like of the interval wind well are poured. And after the construction of the main structure of the interval wind well is completed, shield starting or receiving construction is performed.
The prior art processes have several disadvantages: firstly, after the construction of the main structure of the section wind well is completed, the condition that the shield machine receives or starts in the wind well structure can be met, the shield construction period is limited by the construction progress of the section wind well, and the construction period is delayed; secondly, the wind well is usually of an underground two-layer or multi-layer structure, the engineering scale of the enclosure structure of the foundation pit, the excavation of the foundation pit and the main structure is large, and the engineering cost is high; thirdly, in order to reduce the section wind well burial depth as much as possible, the wind well is usually arranged at a position with shallower line burial depth, the line longitudinal slope scheme is influenced by the position of the wind well, an optimal scheme cannot be selected, and the energy conservation of the line is reduced.
Disclosure of utility model
Based on the problems, the utility model provides a middle wind well structure of a subway tunnel, so that the purposes of independently constructing a shield tunnel and an interval wind well, avoiding delay of construction period, reducing the structure scale of the wind well, reducing engineering investment and reducing construction difficulty are achieved.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
A middle wind shaft structure of a subway tunnel comprises a main body structure for placing a layer of underground wind driven generator, a vertical wind channel constructed by adopting a vertical jacking technology or a vertical jacking technology, and an auxiliary structure which is arranged right above the tunnel and laid along the central line of the tunnel;
The tunnel comprises a left line tunnel and a right line tunnel, wherein the left line tunnel and the right line tunnel are arranged in parallel left and right and extend horizontally at the front end and the rear end in the longitudinal direction; the directions of trains in the left line tunnel and the right line tunnel are opposite; the coming direction is the front, and the leaving direction is the rear;
The main body structure is positioned above the areas of the left line tunnel and the right line tunnel, and comprises a square body structure consisting of an interval air shaft top plate, an interval air shaft bottom plate and an interval air shaft side wall, wherein the inside of the main body structure is divided into a stair area and a ventilation area according to functions; the stair area is a working room in which stairs extend upwards from the bottom plate of the interval wind well to the ground;
The ventilation area comprises an equipment area and a ventilation channel, and the equipment area and the stair area are arranged in the middle area of the main body structure in parallel front and back; the ventilating channels are positioned in two side areas of the main body structure and comprise left line ventilating channels and right line ventilating channels;
Two fans are transversely arranged in the equipment area, the horizontal direction of the machine body of each fan is perpendicular to the central line of the tunnel, and two ends of each fan are communicated with the ventilating duct through a vertical air valve; two piston air shafts are arranged in the ventilating duct and are respectively positioned in the areas above the left line tunnel and the right line tunnel, and the top ends of the piston air shafts are higher than the ground;
The auxiliary structure comprises a horizontal piston air channel and a horizontal mechanical air channel, and the horizontal mechanical air channel and the horizontal piston air channel are respectively arranged at the front end and the rear end of the ventilating channel along the running direction of the train in the left line tunnel and the right line tunnel;
The horizontal piston air duct and the horizontal mechanical air duct are vertically provided with a plurality of vertical air ducts, and are communicated with the left line tunnel and the right line tunnel through the vertical air ducts, so that the ventilation and smoke discharge requirements of the tunnels are met.
Further, the horizontal piston air duct specifically comprises a right horizontal piston air duct positioned above the right tunnel and a left horizontal piston air duct positioned above the left tunnel, wherein the right horizontal piston air duct is communicated with the rear end side wall of the right air duct through a right horizontal piston air duct air valve, and the left horizontal piston air duct is communicated with the rear end side wall of the left air duct through a left horizontal piston air duct air valve;
The horizontal mechanical air duct specifically comprises a right horizontal mechanical air duct positioned above the right tunnel and a left horizontal mechanical air duct positioned above the left tunnel, wherein the right horizontal mechanical air duct is communicated with the front end side wall of the right air duct through a right horizontal mechanical air duct air valve, and the left horizontal mechanical air duct is communicated with the front end side wall of the left air duct through a left horizontal mechanical air duct air valve.
Further, a vertical air valve is transversely arranged in the ventilating duct, wherein a left line negative one-layer vertical air valve is arranged in the left line ventilating duct; and a right line negative one-layer vertical air valve is arranged in the right line ventilating duct.
Further, the two piston air shafts are respectively arranged in the rear section areas of the left line air channel and the right line air channel according to the driving direction.
Further, the top plate of the horizontal piston air duct is flush with the top plate of the interval air well, and the burial depth of the bottom plate of the horizontal piston air duct is smaller than that of the bottom plate of the interval air well; the top plate of the horizontal mechanical air duct is flush with the top plate of the interval air shaft, and the burial depth of the bottom plate of the horizontal mechanical air duct is smaller than the burial depths of the top plate of the interval air shaft and the bottom plate of the horizontal piston air duct.
Further, the bottom plate burial depth and the section size of the horizontal piston air duct are calculated according to ventilation requirements, the clearance size in the horizontal piston air duct is 6.5m multiplied by 3.2m, and the ventilation area is not less than 20 square meters; the bottom plate burial depth and the section size of the horizontal mechanical air duct are calculated according to the mechanical ventilation requirement, the clearance size in the horizontal mechanical air duct is 6.5m multiplied by 2.0m, and the ventilation area is not less than 12.5 square meters.
Further, the vertical air duct comprises a plurality of pipe sections, each pipe section is of a steel structure, the outer diameter D=2.3m and the inner diameter d=D-2 t of each pipe section are of steel pipe wall thickness, t=t0+t1, t0 is the calculated thickness required by structural bearing, t1 is the calculated thickness of the structure in the use life cycle, the length of each pipe section is 1m, and groove welding is adopted between the pipe sections.
Further, the number of vertical air channels of the horizontal piston air channel or the horizontal mechanical air channel = the total ventilation area of the required horizontal piston air channel or the horizontal mechanical air channel/the air channel cross-sectional area a of the single vertical air channel; wherein the sectional area A=pi x d 2/4 of the air duct, d is the inner diameter of the pipe joint; the total ventilation area of the horizontal piston air duct is obtained through simulation of a tunnel ventilation system; total ventilation area of the horizontal mechanical wind tunnel = total ventilation/wind speed of the horizontal mechanical wind tunnel, wherein the total ventilation of the horizontal mechanical wind tunnel is required to be no more than 60m 3/s and the wind speed is no more than 6m/s.
Compared with the prior art, the utility model has the beneficial effects that:
1) According to the utility model, a vertical jacking pipe or a vertical jacking process is adopted to form a vertical air duct, so that independent construction of the shield tunnel and the interval air shaft is realized, the construction period is not mutually limited, and the problem of limitation of the construction progress of the interval air shaft on the construction progress of the shield is solved;
2) The auxiliary structure of the underground one-layer wind well structure main body structure, the horizontal air channel and the vertical air channel reduces the excavation depth of the wind well foundation pit and the structure scale of the wind well in the traditional interval, and reduces the engineering investment;
3) The vertical pipe jacking air duct provided by the utility model has the advantages that the pipe jacking size of a single air duct is smaller, the construction difficulty is small, the ventilation requirement of an interval tunnel can be met, and the air duct is constructed by adopting a mechanical method, so that the construction is efficient and safe;
4) The technology of the utility model can solve the problem that the design of the longitudinal section of the line is limited by the site selection condition of the wind well, so that the longitudinal slope of the line can adopt the optimal scheme, the interval wind well can select the position with less influence on the surrounding environment and less engineering implementation difficulty, and the engineering implementation difficulty, construction risk and engineering investment are reduced.
Drawings
FIG. 1 is a plan view of a section wind well structure of the present utility model;
FIG. 2 is a cross-sectional view of the structure A-A of FIG. 1;
FIG. 3 is a cross-sectional view of the B-B structure of FIG. 1;
FIG. 4 is a cross-sectional view of the C-C structure of FIG. 1;
FIG. 5 is a cross-sectional view of the D-D structure of FIG. 1;
reference numerals:
1-1, side walls of interval wind wells; 1-2, a section wind well roof; 1-3, a section wind well bottom plate; 1-4, a right line piston wind shaft; 1-5, the side wall of a piston wind shaft; 1-6, left line horizontal mechanical wind channel mouth; 1-7, right horizontal piston air duct ports; 1-8, stairwells; 1-9, stairs; 1-10, workshops; 1-11, a wind pavilion;
2-1, a left line vertical mechanical air duct; 2-2, a left line vertical piston air duct; 2-3, a left line vertical air duct head section pipe joint; 2-4, a left line vertical air duct end section pipe joint; 2-5, a left line vertical air duct pipe joint; 2-6, a left line vertical air duct pipe joint seam;
3-1, a right line vertical piston air duct; 3-2, a right line vertical mechanical air duct; 3-3, a right line vertical air duct head section pipe joint; 3-4, a right line vertical air duct end section pipe joint; 3-5, right line vertical duct pipe sections; 3-6, right line vertical duct pipe joint joints;
4-1, a left line horizontal mechanical air duct; 4-2, a left horizontal piston air duct; 4-3, a left line horizontal mechanical air duct air valve; 4-4, a left horizontal piston air duct air valve; 4-5, a left line is provided with a layer of vertical air valve; 4-6, left line piston wind shaft holes;
5-1, a right line horizontal piston air duct; 5-2, a right line horizontal mechanical air duct; 5-3, a right line horizontal piston air duct air valve; 5-4, a right line horizontal mechanical air duct air valve; 5-5, a right line is provided with a layer of vertical air valve; 5-6, right line piston wind shaft holes;
6. A left tunnel; 7. a right-hand tunnel; 7-1, composite steel pipe sheets; 7-2, reinforced concrete segments; 8. a blower.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It will be understood that when an apparatus or element is referred to as being "connected to" another apparatus or element, it can be directly connected to the other apparatus or element or be indirectly connected to the other apparatus or element.
In the description of the present utility model, it should be noted that the terms "deep," "upper," "lower," "left," "right," "vertical," "horizontal," "transverse," "longitudinal," "top," "bottom," "inner," "outer," "front," "rear," and the like indicate an azimuth or a positional relationship based on that shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, but do not indicate or imply that the apparatus or elements referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present utility model.
In the embodiment, as shown in fig. 1-5, the utility model discloses a subway tunnel middle air shaft structure, which mainly comprises a main body structure for placing a layer of underground fans, a vertical air duct constructed by adopting a vertical jacking process or a vertical jacking process, and an auxiliary structure which is arranged right above the tunnel and laid along the central line of the tunnel;
The tunnel comprises a left line tunnel 6 and a right line tunnel 7, and then the left line tunnel 6 and the right line tunnel 7 are arranged in parallel left and right and extend horizontally at the front end and the rear end in the longitudinal direction; wherein the directions of trains in the left line tunnel 6 and the right line tunnel 7 are opposite; taking the coming direction as the front and taking the leaving direction as the rear;
The main structure of the interval wind-tunnel structure is positioned above the areas of the left line tunnel 6 and the right line tunnel 7, and comprises a square structure consisting of an interval wind-tunnel top plate 1-2, an interval wind-tunnel bottom plate 1-3 and an interval wind-tunnel side wall 1-1, wherein the inside of the structure is divided into a stair area and a ventilation area according to functions.
The stair area is a working room 1-10 in which stairs extend upwards from a zone wind shaft bottom plate 1-3 to the ground and mainly comprises stairs 1-9 positioned at a layer below the ground, and a stair well 1-8 arranged above the stairs;
The ventilation area comprises an equipment area and a ventilation channel, wherein the equipment area and the stair area are arranged in the middle area of the main body structure in parallel front and back; the ventilating channels are positioned in the two side areas of the main body structure and comprise left line ventilating channels and right line ventilating channels; the left line ventilation channel is above the area of the left line tunnel 6, and the right line ventilation channel is above the area of the right line tunnel 7.
Two fans 8 are transversely arranged in the equipment area, the horizontal direction of the machine body of each fan 8 is perpendicular to the central line of the tunnel, and two ends of each fan are communicated with ventilation channels positioned at two sides of the main body structure through vertical air valves; two piston air shafts are arranged in the ventilating duct and are respectively positioned in the areas above the left line tunnel and the right line tunnel, piston air shaft holes are formed in the top plate of the interval air shaft, the top end of the piston air shaft is higher than the ground, and air pavilions 1-11 are arranged at the top end of the piston air shaft;
The auxiliary structure comprises a horizontal piston air channel and a horizontal mechanical air channel which are laid along the central line of the tunnel, wherein the horizontal mechanical air channel and the horizontal piston air channel are respectively arranged at the front end and the rear end of the ventilating channel along the running direction of the trains in the left line tunnel 6 and the right line tunnel 7;
The bottom plates of the horizontal piston air channel and the horizontal mechanical air channel are vertically provided with a plurality of vertical air channels, the left line tunnel 6 and the right line tunnel 7 are communicated through the vertical air channels, the lower end of each vertical air channel is connected with a reserved hole at the top of the main tunnel, the upper end of each vertical air channel is connected with the bottom plate of the horizontal piston air channel or the bottom plate of the horizontal mechanical air channel, and the overall height of each vertical air channel is the vertical distance between the top of the tunnel and the bottom of the bottom plate of the horizontal piston air channel or the bottom plate of the horizontal mechanical air channel. According to the utility model, the vertical air duct is formed by adopting a vertical jacking pipe or vertical jacking technology, so that independent construction of the shield tunnel and the interval air shaft is realized, the construction period is not mutually limited, and the problem of limitation of the construction progress of the interval air shaft on the construction progress of the shield is solved.
The horizontal piston air channel specifically comprises a right horizontal piston air channel 5-1 positioned above a right tunnel 7 and a left horizontal piston air channel 4-2 positioned above a left tunnel 6, wherein the right horizontal piston air channel 5-1 is communicated with the rear end side wall of the right air channel through a right horizontal piston air channel air valve 5-3 and then is connected with a right horizontal piston air channel opening 1-7, and the left horizontal piston air channel 4-2 is communicated with the right horizontal piston air channel opening through a left horizontal piston air channel air valve 4-4 and the rear end side wall of the left air channel by taking the vehicle-leaving direction as the front;
The horizontal mechanical air channel specifically comprises a right horizontal mechanical air channel 5-2 positioned above a right tunnel 7 and a left horizontal mechanical air channel 4-1 positioned above a left tunnel 6, wherein the right horizontal mechanical air channel 5-2 is communicated with the front end side wall of the right air channel through a right horizontal mechanical air channel air valve 5-4, and the left horizontal mechanical air channel 4-1 is communicated with the left horizontal mechanical air channel 1-5 through a left horizontal mechanical air channel air valve 4-3.
The left horizontal piston air channel 4-2 is connected with the left tunnel 6, the left vertical piston air channel 2-2 is connected with the left horizontal mechanical air channel 4-1 and the left tunnel 6, and the left vertical mechanical air channel 2-1 is connected with the left horizontal mechanical air channel 6; the right horizontal piston air channel 5-1 is connected with the right vertical piston air channel 3-1 of the right tunnel 7, the right horizontal mechanical air channel 5-2 is connected with the right vertical mechanical air channel 3-2 of the right tunnel 7, and the vertical air channels are mainly used for meeting the ventilation and smoke discharge requirements of the tunnel.
A vertical air valve is transversely arranged in the ventilating duct, wherein a left line negative layer vertical air valve 4-5 is arranged in the left line ventilating duct; a right line negative one-layer vertical air valve 5-5 is arranged in the right line ventilating duct.
The two piston air shafts are respectively arranged in the rear section areas of the left line air channel and the right line air channel by taking the coming vehicle direction as the front and taking the leaving vehicle direction as the rear.
The top plate of the horizontal piston air duct is flush with the top plate 1-2 of the interval air shaft, and the burial depth of the bottom plate of the horizontal piston air duct is smaller than the burial depth of the bottom plate 1-3 of the interval air shaft; the top plate of the horizontal mechanical air duct is flush with the top plate 1-2 of the interval air shaft, and the burial depth of the bottom plate of the horizontal mechanical air duct is smaller than the burial depths of the bottom plates 1-2 of the interval air shaft and the bottom plate of the horizontal piston air duct. The bottom plate burial depth and the section size of the horizontal piston air duct are calculated according to ventilation requirements, the clearance size in the horizontal piston air duct is 6.5m multiplied by 3.2m, and the ventilation area is not less than 20 square meters; the bottom plate burial depth and the section size of the horizontal mechanical air duct are calculated according to the mechanical ventilation requirement, the clearance size in the horizontal mechanical air duct is 6.5m multiplied by 2.0m, and the ventilation area is not less than 12.5 square meters.
The number of the vertical air channels can be calculated and determined according to the air channel sectional area and the total ventilation volume requirement, specifically, the number of the horizontal piston air channels or the vertical air channels of the horizontal mechanical air channels=the total ventilation area of the required horizontal piston air channels or the horizontal mechanical air channels/the air channel sectional area of a single vertical air channel; wherein the air duct cross section area A=pi d 2/4, and the total ventilation area of the horizontal piston air duct is obtained through the simulation of a tunnel ventilation system; total ventilation area of the horizontal mechanical wind tunnel = total ventilation/wind speed of the horizontal mechanical wind tunnel, wherein the total ventilation of the horizontal mechanical wind tunnel is required to be no more than 60m 3/s and the wind speed is no more than 6m/s.
The present embodiment provides an example to facilitate better understanding of the present technical solution. The piston wind has no formula relation, and the required total ventilation area is obtained through software simulation, namely according to the simulation result of the tunnel ventilation system; the relation between the mechanical air ventilation quantity and the ventilation area is as follows: the total ventilation is required to be not more than 60m 3/s, the wind speed is calculated according to not more than 6m/s, and in the embodiment, the total ventilation area=60/6=10m 2 is calculated according to the maximum value.
In this embodiment, as an preference, 4 vertical air channels are provided below the horizontal piston air channel, and 3 vertical air channels are provided below the horizontal air channel.
The vertical air duct comprises a plurality of pipe sections, each pipe section adopts a steel structure, the outer diameter D=2.3 m of each pipe section is equal to D-2t, t is the wall thickness of the steel pipe, t=t0+t1, t0 is the calculated thickness required by structural bearing, t1 is the calculated thickness of the structure calculated by corrosion in the life cycle, the length of each pipe section is 1m, pipe section joints among the pipe sections adopt groove welding, in the embodiment, t=0.03 m, so d=2.3-2×0.03=2.24 m, and the air duct sectional area A=pi×d2/4×4m of each vertical air duct is equal to 4m.
In the horizontal piston air duct, according to the simulation result of the tunnel ventilation system, the total area required by the piston wind of the subway 6B type vehicle is 16m < 2 >, A=pi×d2/4 is approximately equal to 4m, and the number of the air ducts is calculated to be 16/4=4; in the horizontal mechanical air duct, the total area required by the mechanical air is 10m2, A=pi×d2/4 is approximately equal to 4m, and the number of the air ducts is calculated to be 10/4=2.5, and the number is rounded to be 3.
Two pipe joints can be occupied when the tail pipe joint of the vertical air duct is communicated with the main tunnel, namely a left-line tunnel and a right-line tunnel, the front pipe joint and the rear pipe joint of the tail pipe joint of the vertical air duct adopt steel pipe sheets, and the pipe sheets of the other section tunnels adopt reinforced concrete pipe sheets.
The single air duct jacking pipe is small in size and construction difficulty, not only can meet the ventilation requirement of an interval tunnel, but also the air duct is constructed by adopting a mechanical method, and the construction is efficient and safe. Secondly, the auxiliary structure of the underground one-layer wind well structure main body structure, the horizontal wind channel and the vertical wind channel reduces the excavation depth of the wind well foundation pit and the structure scale of the wind well in the traditional interval, reduces the engineering investment, and can solve the problem that the design of the longitudinal section of a line is limited by the site selection condition of the wind well, so that the longitudinal slope of the line can adopt the optimal scheme, the interval wind well can select the position with less influence on the surrounding environment and less engineering implementation difficulty, and reduces the engineering implementation difficulty, construction risk and engineering investment.
The above description is only a preferred embodiment of the present utility model, and the protection scope of the present utility model is not limited to the above examples, and all technical solutions belonging to the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that modifications and adaptations to the present utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.
Claims (8)
1. The middle wind shaft structure of the subway tunnel is characterized by comprising a main body structure for placing a layer of underground wind driven generator, a vertical wind channel constructed by adopting a vertical jacking process or a vertical jacking process, and an auxiliary structure which is arranged right above the tunnel and laid along the central line of the tunnel;
The tunnel comprises a left line tunnel (6) and a right line tunnel (7), wherein the left line tunnel (6) and the right line tunnel (7) are arranged in parallel left and right and both longitudinally extend horizontally at the front end and the rear end; the directions of trains in the left line tunnel (6) and the right line tunnel (7) are opposite; the directions of the left tunnel (6) and the right tunnel (7) are the front and the rear of the coming direction;
The main body structure is positioned above the areas of the left line tunnel (6) and the right line tunnel (7), and comprises a square structure consisting of an interval air shaft top plate (1-2), an interval air shaft bottom plate (1-3) and an interval air shaft side wall (1-1), wherein the inside of the square structure is divided into a stair (1-9) area and a ventilation area according to functions; the stair (1-9) area is a working room (1-10) in which the stair (1-9) extends upwards from the interval wind shaft bottom plate (1-3) to the ground;
The ventilation area comprises an equipment area and a ventilation channel, and the equipment area and the stair (1-9) areas are arranged in the middle area of the main body structure in parallel front and back; the ventilating channels are positioned in two side areas of the main body structure and comprise left line ventilating channels and right line ventilating channels;
Two fans are transversely arranged in the equipment area, the horizontal direction of the machine body of each fan is perpendicular to the central line of the tunnel, and two ends of each fan are communicated with the ventilating duct through a vertical air valve; two piston air shafts are arranged in the ventilating duct and are respectively positioned in the areas above the left line tunnel (6) and the right line tunnel (7), and the top end of each piston air shaft is higher than the ground;
The auxiliary structure comprises a horizontal piston air channel and a horizontal mechanical air channel, and the horizontal mechanical air channel and the horizontal piston air channel are respectively arranged at the front end and the rear end of the ventilating channel along the running direction of the train in the left line tunnel (6) and the right line tunnel (7);
The horizontal piston air duct and the horizontal mechanical air duct are vertically provided with a plurality of vertical air ducts, and are communicated with the left line tunnel (6) and the right line tunnel (7) through the vertical air ducts.
2. The middle air shaft structure of the subway tunnel according to claim 1, wherein the horizontal piston air channel specifically comprises a right horizontal piston air channel (5-1) positioned above a right tunnel (7) and a left horizontal piston air channel (4-2) positioned above a left tunnel (6), the right horizontal piston air channel (5-1) is communicated with the rear end side wall of the right air channel through a right horizontal piston air channel (5-1) air valve, and the left horizontal piston air channel (4-2) is communicated with the rear end side wall of the left air channel through a left horizontal piston air channel (4-2) air valve;
The horizontal mechanical air duct specifically comprises a right horizontal mechanical air duct (5-2) positioned above a right tunnel (7) and a left horizontal mechanical air duct (4-1) positioned above a left tunnel (6), wherein the right horizontal mechanical air duct (5-2) is communicated with the front end side wall of the right air duct through a right horizontal mechanical air duct (5-2) air valve, and the left horizontal mechanical air duct (4-1) is communicated with the front end side wall of the left air duct through a left horizontal mechanical air duct (4-1) air valve.
3. The middle air shaft structure of the subway tunnel according to claim 1, wherein a vertical air valve is transversely arranged in the air channel, and a left line negative one-layer vertical air valve (4-5) is arranged in the left line air channel; a right line negative one-layer vertical air valve (5-5) is arranged in the right line ventilating duct.
4. The structure of an intermediate wind shaft for a subway tunnel according to claim 1, wherein the two piston wind shafts are respectively disposed in rear sections of the left and right air passages according to driving directions.
5. A subway tunnel middle wind shaft structure according to claim 1, wherein the top plate of the horizontal piston wind channel is flush with the top plate (1-2) of the section wind shaft, and the bottom plate of the horizontal piston wind channel is buried with a depth smaller than that of the bottom plate (1-3) of the section wind shaft; the top plate of the horizontal mechanical air duct is flush with the top plate (1-2) of the interval air well, and the burial depth of the bottom plate of the horizontal mechanical air duct is smaller than the burial depths of the bottom plate (1-2) of the interval air well and the bottom plate of the horizontal piston air duct.
6. The middle wind shaft structure of a subway tunnel according to claim 1, wherein the bottom plate burial depth and the section size of the horizontal piston wind channel are calculated according to ventilation requirements, the clearance size in the horizontal piston wind channel is 6.5m multiplied by 3.2m, and the ventilation area is not less than 20 square meters; the bottom plate burial depth and the section size of the horizontal mechanical air duct are calculated according to the mechanical ventilation requirement, the clearance size in the horizontal mechanical air duct is 6.5m multiplied by 2.0m, and the ventilation area is not less than 12.5 square meters.
7. The subway tunnel middle wind shaft structure according to claim 1, wherein the vertical wind channel comprises a plurality of pipe sections, each pipe section adopts a steel structure, the outer diameter d=2.3m of the pipe section and the inner diameter d=d-2 t are steel pipe wall thicknesses, t=t0+t1, t0 is a calculated thickness required by structural bearing, t1 is a calculated thickness of the structure in a life cycle of corrosion, the length of each pipe section is 1m, and groove welding is adopted between the pipe sections.
8. A subway tunnel intermediate air shaft structure as in claim 1, 6 or 7, wherein the number of vertical air passages of the horizontal piston air passage or the horizontal mechanical air passage = the total ventilation area of the horizontal piston air passage or the horizontal mechanical air passage/the air passage cross-sectional area a of a single vertical air passage; wherein the sectional area A=pi x d 2/4 of the air duct, d is the inner diameter of the pipe joint; the total ventilation area of the horizontal piston air duct is obtained through simulation of a tunnel ventilation system; total ventilation area of the horizontal mechanical wind channel = total ventilation/wind speed of the horizontal mechanical wind channel, wherein the total ventilation of the horizontal mechanical wind channel is not more than 60m 3/s and the wind speed is not more than 6m/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322711509.4U CN221144424U (en) | 2023-10-09 | 2023-10-09 | Middle wind shaft structure of subway tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322711509.4U CN221144424U (en) | 2023-10-09 | 2023-10-09 | Middle wind shaft structure of subway tunnel |
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