CN114135963A - New wind channel and urgent sparse mouthful co-construction structure for subway - Google Patents

New wind channel and urgent sparse mouthful co-construction structure for subway Download PDF

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Publication number
CN114135963A
CN114135963A CN202111359669.6A CN202111359669A CN114135963A CN 114135963 A CN114135963 A CN 114135963A CN 202111359669 A CN202111359669 A CN 202111359669A CN 114135963 A CN114135963 A CN 114135963A
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CN
China
Prior art keywords
fresh air
stair
emergency evacuation
air duct
subway
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202111359669.6A
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Chinese (zh)
Inventor
黄春晖
任磊
张珂
张雪
王晓睿
包宏涛
郭梦
卢晓禹
郑雨
张敏捷
石磊
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Zhengzhou Metro Group Co ltd
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Zhengzhou Metro Group Co ltd
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Publication date
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Priority to CN202111359669.6A priority Critical patent/CN114135963A/en
Publication of CN114135963A publication Critical patent/CN114135963A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
    • F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
    • E02D29/05—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them at least part of the cross-section being constructed in an open excavation or from the ground surface, e.g. assembled in a trench
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/0007—Base structures; Cellars
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
    • E04F11/02—Stairways; Layouts thereof
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
    • E04F11/02—Stairways; Layouts thereof
    • E04F11/104—Treads
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/02—Ducting arrangements

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • General Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Fluid Mechanics (AREA)
  • Electromagnetism (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)

Abstract

The invention discloses a combined construction structure of a fresh air duct and an emergency evacuation port for a subway, relates to the technical field of fresh air duct structures, and solves the technical problem that the floor area is large because the fresh air duct of the subway needs to be separately discharged from the ground in the prior art, including the structure that the fresh air duct is independently discharged from the groundAn emergency evacuation port, wherein an open staircase is arranged in the emergency evacuation port, the new air duct is adjacent to the open staircase and is arranged at one side close to the second stair, and the top plate of the new air duct is lower than the ground; a partition wall is arranged between the new air duct and the open stairwell; a fresh air opening is formed in the partition wall above the second stair, and a first safety protection net is arranged at the fresh air opening; the effective air inlet area of the fresh air inlet is at least 12m2The effective air inlet area of the open staircase is larger than or equal to that of the fresh air inlet; the co-building structure reduces the influence on the landscape around the urban main road and also reduces the land acquisition difficulty.

Description

New wind channel and urgent sparse mouthful co-construction structure for subway
Technical Field
The invention relates to the technical field of a fresh air duct structure, in particular to the technical field of a combined structure of a fresh air duct and an emergency evacuation port for a subway.
Background
The traditional new wind channel of subway is generally separately constructed with the emergency evacuation mouth, and the ground is independently ejected respectively, which can cause the following problems: 1. the peripheral landscape of the urban main road is damaged, and the urban space is cut; 2. the permanent land for the subway is required to be collected for the two land grounds respectively, so that the land collection area is large and the working difficulty is large; 3. in the urban space, the coordination of factors such as fire prevention, fire rescue and the like and the distance between other buildings in the city need to be considered, and the ground arrangement is greatly limited; 4. the decoration difficulty of the outer vertical surfaces is high, and the problem that the outer vertical surfaces and the urban peripheral area are fused needs to be considered respectively.
However, if the new air duct and the emergency evacuation port can be built together without the new air duct being pushed out of the ground independently, the above-mentioned problems can be largely avoided. Therefore, the existing new air duct structure and emergency evacuation port structure need to be improved, and a new air duct and emergency evacuation port combined construction structure for the subway is designed.
Disclosure of Invention
The invention aims to: in order to solve the technical problems, the invention provides a new air duct and emergency evacuation port combined construction structure for a subway.
The invention specifically adopts the following technical scheme for realizing the purpose:
a new air duct and emergency evacuation port combined construction structure for a subway is disclosed. The combined building structure comprises an emergency evacuation port which independently goes out of the ground, wherein an open staircase is arranged in the emergency evacuation port, and at least a first stair, a first rest platform, a second stair, a second rest platform and a third stair are arranged in the open staircase from top to bottom; a partition wall is arranged between the new air duct and the open stairwell; a fresh air opening is formed in the partition wall above the second stair, and a first safety protection net is arranged at the fresh air opening; the effective air inlet area of the fresh air inlet is at least 12m2And the effective air inlet area of the open staircase is more than or equal to that of the fresh air port.
Further, the bottom edge of the fresh air opening is obliquely and upwards arranged along the extending direction of the second stair, and the top edge of the fresh air opening is lower than the top plate and is horizontally arranged.
Furthermore, the bottom edge of the fresh air opening is obliquely and upwards arranged along the extending direction of the second stair and then horizontally arranged along the first resting platform.
Furthermore, the bottom edge of the fresh air inlet is horizontally arranged along the second rest platform, is obliquely and upwards arranged along the extending direction of the second stair, and is horizontally arranged along the first rest platform.
Further, the step width of the first running stair and the step width of the second running stair are 245-plus-255 mm, the step height is 170-plus-180 mm, and the step number is 18.
Further, the vertical height of the bottom edge of the fresh air inlet from the top surface of the second stair running step is not less than 1.5 m.
Furthermore, a top cover is arranged on the ground outlet part of the emergency dispersion outlet, and an outlet for entering and exiting the open stairwell is arranged right in front of the top cover.
Further, a second safety protection net is also arranged between the outlet and the second running stair.
Further, the outlet is provided with a door body with a through hole, and the inner side of the door body is provided with an opening button.
Further, the height of the top cover is 2.2-2.4 m.
The invention has the following beneficial effects:
(1) according to the invention, the fresh air port is arranged on the partition wall, the space above the stairs of the emergency evacuation port is utilized to complete the conversion of the fresh air duct, the space above the open stairwell is further utilized to form a fresh air shaft, the fresh air duct is cancelled to be singly taken out of the ground, and the fresh air duct is combined with the emergency evacuation port to be taken out of the ground, so that the sound of subway construction to urban ground landscape is reduced, and meanwhile, the land acquisition area can also be reduced;
(2) according to the invention, the fresh air duct is arranged at one side close to the second stair and the rest platform, so that the space utilization rate of the upper space of the open stairwell can be improved, the effective ventilation area of the fresh air opening is increased, and the requirement of the subway fresh air duct on the ventilation quantity is met;
(3) according to the invention, the first safety protection net is arranged at the fresh air inlet, so that the safety is ensured while the ventilation requirement is met.
Drawings
Fig. 1 is a perspective view of a combined structure of a new air duct and an emergency evacuation port for a subway according to the present invention;
FIG. 2 is a plan view above the ground of a combined structure of a new air duct and an emergency evacuation port for a subway according to the present invention;
FIG. 3 is a 3m depth plan view of a combined structure of a new air duct and an emergency evacuation port for a subway according to the present invention;
fig. 4 is a longitudinal sectional view of a combined structure of a new air duct and an emergency evacuation port for a subway according to the present invention;
FIG. 5 is a 3m depth plan view of a combined structure of a new air duct and an emergency evacuation port for a subway according to the present invention;
fig. 6 is a longitudinal sectional view of a combined structure of a new air duct and an emergency evacuation port for a subway according to the present invention;
FIG. 7 is a 3m depth plan view of a combined structure of a new air duct and an emergency evacuation port for a subway according to the present invention;
fig. 8 is a longitudinal sectional view of a combined structure of a new air duct and an emergency evacuation port for a subway according to the present invention;
fig. 9 is a 3m depth plan view of a combined structure of a new air duct and an emergency evacuation port for a subway according to the present invention;
fig. 10 is a longitudinal sectional view of a combined structure of a new air duct and an emergency evacuation port for a subway according to the present invention;
reference numerals: 1-emergency evacuation of the mouth; 2-open stairwell; 3-first run stairs; 4-a first resting platform; 5-second stair running; 6-a second resting platform; 7-the third flight stairs; 8-a fresh air duct; 9-a dividing wall; 10-fresh air port; 11-a first safety protection net; 12-a top cover; 13-a second safety protection net; 14-door body.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1 to 10, the present embodiment provides a new air duct and emergency evacuation opening combined structure for subway. The combined building structure comprises an emergency dispersing opening 1 which independently goes out of the ground, wherein an open staircase 2 is arranged in the emergency dispersing opening 1, and the open staircase 2 is at least provided with a first stair 3, a first rest platform 4, a second stair 5, a second rest platform 6 and a third stair 7 from top to bottom; a partition wall 9 is arranged between the fresh air duct 8 and the open stairwell 2, a fresh air port 10 is arranged on the partition wall 9 and above the second stairwell 5, and a first safety protection net 11 is arranged on the fresh air port 10; the effective air inlet area of the fresh air inlet 10 is at least 12m2And the effective air inlet area of the emergency scattering port 1 is more than or equal to that of the fresh air port 10.
By adopting the technical scheme, the invention is improved on the basis of the open stairwell 2 of the subway emergency dispersion opening 1, the new air duct 8 is arranged close to the open stairwell 2, and the new air opening 10 is arranged on the partition wall 9 between the new air duct 8 and the open stairwell 2, so that the new air duct 8 and the emergency dispersion opening 1 can be built together by utilizing the space above the open stairwell 2 of the emergency dispersion opening 1, namely, the new air duct 8 is taken out of the ground alone, and only the emergency dispersion opening 1 is exposed out of the ground. Therefore, the combined construction structure can reduce the sound of underground engineering construction to urban ground landscape and can also reduce the land acquisition area. In addition, according to the subway construction requirement, the effective air inlet area of the fresh air inlet 10 is at least 12m2Meanwhile, the effective air inlet area of the emergency scattering port 2 is required to be more than or equal to that of the fresh air port 10The ventilation requirement of the new air duct 8 can be met.
It should be noted that, in the open staircase 2, the first stair 3 and the second stair 5 need only be protected and secured by the handrail enclosure, and no wall isolation is required to be arranged between the first stair 3 and the second stair 5, and the first stair 3 and the second stair 5 cannot be isolated by the wall isolation due to the existence of the first resting platform 4. Therefore, the fresh air duct 8 completes the turning at the fresh air inlet 10 and then leads to the ground from the upper spaces of the first stair 3 and the second stair 5.
The new air duct 8 and the emergency dispersing opening 1 are built together, the new air duct 8 is not used for leaving the ground independently, the land acquisition area is reduced, and the work difficulty of land acquisition and migration is reduced; the new air duct 8 and the emergency dispersing opening 1 are combined above the ground, so that the influence of subway auxiliary facilities on the peripheral landscape of the urban main road is reduced, and the urban space is reduced; the emergency dispersing opening 1 and the emergency dispersing opening 1 are combined out of the ground, the problem of the distance between the fire prevention, the fire rescue and other urban building structures in the urban space is solved well, and the limited factors of ground arrangement are reduced; the emergency dispersing opening 1 and the emergency dispersing opening 1 are combined out of the ground, the decoration difficulty of the outer vertical surface is reduced, and the problem of fusion of the outer vertical surface of the separate building and the surrounding area of the city is only needed to be considered.
Example 2
Regarding the shape of the fresh air opening 10, in view of increasing the effective ventilation area of the fresh air opening 10, the following arrangement can be made with reference to fig. 3 and 4: the bottom edge of the fresh air opening 10 is obliquely and upwards arranged along the extending direction of the second stair 5, the top edge of the fresh air opening 10 is lower than the top plate and is horizontally arranged, and the structure enables the space in the height direction of the second stair 4 to be effectively utilized. Further, in view of increasing the safety at the fresh air opening 10, the vertical height of the bottom edge of the fresh air opening 10 from the top surface of the step of the second stair 5 is not less than 1.5m, preferably not less than 2 m.
Further, in order to enlarge the area of the fresh air opening 10 as much as possible, as shown in fig. 5 and 6, the bottom edge of the fresh air opening 10 is first obliquely and upwardly arranged along the extending direction of the second stair 5 and then horizontally arranged along the first landing 4, so that the space above the second stair 5 and the first landing 4 can be effectively utilized. Correspondingly, the vertical height of the bottom edge of the fresh air opening 10 from the top surface of the step of the second stair 5 and the first rest platform 4 is not less than 2 m.
Or, as shown in fig. 7 and 8, the bottom edge of the fresh air opening 10 is horizontally arranged along the second resting platform 6, and then is obliquely and upwardly arranged along the extending direction of the second stair 5, so that the space above the second resting platform 6 and the second stair 5 can be effectively utilized. Accordingly, the vertical height of the bottom edge of the fresh air opening 10 from the top surface of the step of the second stair 5 and the second resting platform 6 is not less than 1.5m, preferably not less than 2 m.
Furthermore, in order to enlarge the area of the fresh air opening 10 as much as possible, as shown in fig. 9 and 10, the bottom edge of the fresh air opening 10 may also be horizontally arranged along the second resting platform 6, then obliquely upwards arranged along the extending direction of the second stair 5, and then horizontally arranged along the first resting platform 4, so that the space above the first resting platform 4, the second stair 5, and the second resting platform 6 can be effectively utilized. Correspondingly, the vertical height of the bottom edge of the fresh air opening 10 from the top surface of the step of the second stair 5 and the first and second half- platforms 4 and 6 is not less than 1.5m, preferably not less than 2 m.
Example 3
In order to ensure the ventilation area of the fresh air inlet 10, the original stair steps need to be adaptively modified. Specifically, it is considered to extend the length and height of the open staircase 2 so as to increase the area of the fresh air opening 10, for example, to set the step width of the first running staircase 3 and the second running staircase 5 to 245-255mm, preferably 250 mm; the step height is set to be 170 and 180mm, preferably 175 mm; the number of the steps is set to be the highest number of the steps of the single-run stairs allowed by subway construction, namely 18.
Example 4
This embodiment relates to the case where the emergency evacuation port 1 exits the ground portion. Further, a top cover 12 is arranged on the part of the emergency dispersion opening 1, which is out of the ground, and an outlet for getting in and out of the open staircase 2 is arranged right in front of the top cover 12. The roof casing 12 is used to shelter the open staircase 2 from wind and rain. Further, the height of the top cover 12 is 2.2 to 2.4 m.
Further, in order to ensure the safety of personnel entering and exiting, a second safety protection net 13 is also arranged between the exit of the entrance and exit open staircase 2 and the second running staircase 5. In order to ensure the strength of the first and second safety nets 11, 13, it is preferable to manufacture the first and second safety nets using a stainless steel material. Further, the meshes of the first safety protection net 11 and the second safety protection net 13 are not larger than 50mm × 50mm, which prevents sundries from falling carelessly and ensures the safety of personnel.
Further, a door body 14 with a through hole is arranged at an outlet of the open staircase 2, and an opening button is arranged on the inner side of the door body 14. The door body 14 of the emergency scattering port 1 is closed and locked to be unused at ordinary times, and the ventilation is not influenced because the door body 14 is provided with a through hole; in case of fire, the door 14 can be opened at the inner side, and people can escape through the emergency dispersion opening 1.

Claims (10)

1. A new air duct and emergency evacuation port co-building structure for a subway comprises an emergency evacuation port which is independent of the ground, wherein an open staircase is arranged in the emergency evacuation port, and at least a first stair, a first rest platform, a second stair, a second rest platform and a third stair are arranged in the open staircase from top to bottom; a partition wall is arranged between the new air duct and the open stairwell; a fresh air opening is formed in the partition wall above the second stair, and a first safety protection net is arranged at the fresh air opening; the effective air inlet area of the fresh air inlet is at least 12m2And the effective air inlet area of the open staircase is more than or equal to that of the fresh air port.
2. The structure of claim 1, wherein the bottom edge of the fresh air opening is arranged obliquely upward along the extending direction of the second stair, and the top edge of the fresh air opening is lower than the top plate and is arranged horizontally.
3. The structure of claim 2, wherein the bottom edge of the fresh air opening is arranged obliquely upward along the extending direction of the second stair and then horizontally along the first landing.
4. A subway fresh air duct and emergency evacuation port combined structure as claimed in claim 2, wherein said fresh air opening bottom edge is horizontally disposed along said second rest platform, then obliquely upward along said second stairway extending direction, and then horizontally disposed along said first rest platform.
5. The structure as claimed in claim 1, wherein the first and second stairs have a step width of 245-.
6. The structure of claim 1, wherein the vertical height of the bottom edge of the fresh air opening from the top surface of the second stair tread is not less than 1.5 m.
7. A new air duct and emergency evacuation port co-building structure for subway according to claim 1, wherein said emergency evacuation port is provided with a top cover on the ground outlet, and an outlet for entering and exiting said open stairwell is provided right in front of said top cover.
8. A new wind channel and emergency evacuation mouth combined structure for subway according to claim 7, wherein a second safety protection net is also arranged between said exit and said second stairs.
9. A new wind channel and emergency evacuation mouth combined structure for subway according to claim 7, wherein said outlet is provided with a door body with through hole, and the inner side of said door body is provided with an opening button.
10. A new wind tunnel and emergency evacuation mouth combined structure for subway according to claim 7, wherein said top cover height is 2.2-2.4 m.
CN202111359669.6A 2021-11-18 2021-11-18 New wind channel and urgent sparse mouthful co-construction structure for subway Pending CN114135963A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111359669.6A CN114135963A (en) 2021-11-18 2021-11-18 New wind channel and urgent sparse mouthful co-construction structure for subway

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111359669.6A CN114135963A (en) 2021-11-18 2021-11-18 New wind channel and urgent sparse mouthful co-construction structure for subway

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CN114135963A true CN114135963A (en) 2022-03-04

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101763771B1 (en) * 2016-05-13 2017-08-02 대한기술단(주) Underground Drainage and Ventilation System of Underground Power Line
CN206646766U (en) * 2017-03-28 2017-11-17 启迪设计集团股份有限公司 Go out ground fresh air well construction for underground space dependent
CN209042677U (en) * 2018-09-28 2019-06-28 中铁第六勘察设计院集团有限公司 A kind of fire-fighting evacuation stair pressurization ventilating shaft and new ventilating shaft Striping
CN110004976A (en) * 2019-04-15 2019-07-12 中铁第四勘察设计院集团有限公司 A kind of subway underground station ventilating shaft and fire-fighting evacuation staircase build structure jointly
CN113251534A (en) * 2021-05-21 2021-08-13 中铁第六勘察设计院集团有限公司 Scissor stair pressurization air supply system for fire evacuation of subway station
CN113417687A (en) * 2021-08-11 2021-09-21 郑州地铁集团有限公司 Injection induced ventilation smoke exhaust system applied to subway entrance and exit line

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101763771B1 (en) * 2016-05-13 2017-08-02 대한기술단(주) Underground Drainage and Ventilation System of Underground Power Line
CN206646766U (en) * 2017-03-28 2017-11-17 启迪设计集团股份有限公司 Go out ground fresh air well construction for underground space dependent
CN209042677U (en) * 2018-09-28 2019-06-28 中铁第六勘察设计院集团有限公司 A kind of fire-fighting evacuation stair pressurization ventilating shaft and new ventilating shaft Striping
CN110004976A (en) * 2019-04-15 2019-07-12 中铁第四勘察设计院集团有限公司 A kind of subway underground station ventilating shaft and fire-fighting evacuation staircase build structure jointly
CN113251534A (en) * 2021-05-21 2021-08-13 中铁第六勘察设计院集团有限公司 Scissor stair pressurization air supply system for fire evacuation of subway station
CN113417687A (en) * 2021-08-11 2021-09-21 郑州地铁集团有限公司 Injection induced ventilation smoke exhaust system applied to subway entrance and exit line

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Application publication date: 20220304