CN216277968U - Ventilation system for urban underground loop - Google Patents
Ventilation system for urban underground loop Download PDFInfo
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- CN216277968U CN216277968U CN202122741258.5U CN202122741258U CN216277968U CN 216277968 U CN216277968 U CN 216277968U CN 202122741258 U CN202122741258 U CN 202122741258U CN 216277968 U CN216277968 U CN 216277968U
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Abstract
The utility model provides a ventilation system for an urban underground loop, which comprises a semi-transverse air supply system and a key smoke exhaust system, wherein the semi-transverse air supply system comprises an air supply duct and an air supply fan room, the air supply duct is laid along the top of the urban underground loop and is divided into a plurality of sections of ducts by partition plates, the air supply fan room is respectively arranged corresponding to each section of air supply duct and is communicated with the corresponding air supply duct, and air supply ports are arranged on the air supply duct at intervals; the utility model adopts a tunnel ventilation mode of tunnel semi-transverse air supply and key smoke discharge, can improve the air quality in the tunnel under normal working conditions, and can discharge smoke nearby under the working condition of fire, thereby avoiding the spread of smoke in the tunnel.
Description
Technical Field
The utility model belongs to the technical field of ventilation and smoke exhaust of underground loops, and particularly relates to a ventilation system for an urban underground loop.
Background
In recent years, underground loops (also called underground garage connecting roads) have raised a construction heat tide in order to expand road capacity, relieve traffic pressure and share parking space resources of surrounding plots. The design of ventilation schemes for underground loops, which is one of the important design contents for underground tunnel design, often has a significant impact on the design of tunnel schemes. However, there is currently no detailed design specification and uniform design methodology for ventilation systems for underground loops. The underground loop is usually in an annular or more complex annular network structure, and the conventional longitudinal ventilation design method of the highway tunnel is difficult to effectively organize airflow to remove harmful gas or high-temperature smoke in the tunnel, even the ventilation direction is opposite to the driving direction, so that the fire hazard is aggravated; and the underground loop is often built in a busy commercial district of residential areas, and the adoption of the concentrated discharge method of the semi-transverse exhaust and smoke exhaust system needs to consider the high-altitude discharge, so that the influence on the manufacturing cost and the surrounding landscape is large. Therefore, how to design an economical and reasonable underground loop ventilation system is a major problem faced by the current underground loop engineering.
Disclosure of Invention
The utility model aims to solve the technical problems and provides a ventilation system for an urban underground loop, which has good economic benefit and small influence on the surrounding environment.
The technical scheme adopted by the utility model for solving the technical problems is as follows: a ventilation system for an urban underground loop is characterized by comprising a semi-transverse air supply system and a key smoke exhaust system, wherein each section of the urban underground loop is provided with a vehicle access and an underground garage access; the key smoke exhaust system comprises a smoke exhaust duct and a smoke exhaust machine room, wherein the smoke exhaust duct is laid along the top of the urban underground loop, the smoke exhaust machine room is arranged on two sides of the smoke exhaust duct and communicated with the smoke exhaust duct, and smoke exhaust ports are arranged on the smoke exhaust duct at intervals.
According to the scheme, the blower is arranged in the blower room, and the two smoke exhaust fans are arranged in the smoke exhaust machine room and are used for one purpose.
According to the scheme, the interval between two adjacent air supply openings is 25-35m, and the interval between two adjacent smoke exhaust openings is 55-65 m.
According to the scheme, the air supply opening is a single-layer shutter air opening, and the smoke exhaust opening is a normally closed air opening.
The utility model has the beneficial effects that: the ventilation system for the urban underground loop is provided, a semi-transverse air supply mode is adopted under the ordinary working condition, the near scattered pollution discharge of the entrances and exits of all vehicles and the connecting channel with the underground garage is fully utilized, the pollutant concentration of each discharge port is low, and the influence on the surrounding environment is small; meanwhile, the influence of high tower exhaust air required by centralized exhaust air on peripheral buildings and construction cost can be effectively solved by adopting a semi-transverse air supply mode, and the economic benefit is good.
Drawings
FIG. 1 is a plan view of one embodiment of the present invention.
FIG. 2 is a cross-sectional view of one embodiment of the present invention.
Wherein: the method comprises the following steps of 1-vehicle entrance and exit, 2-underground garage entrance and exit, 3-air supply duct, 4-air supply fan room, 5-partition plate, 6-air supply outlet, 7-smoke exhaust duct, 8-smoke exhaust machine room, 9-smoke exhaust outlet, 10-air supply fan and 11-smoke exhaust fan.
Detailed Description
For a better understanding of the present invention, reference is made to the following description taken in conjunction with the accompanying drawings and examples.
As shown in fig. 1 and 2, a ventilation system for an urban underground loop, wherein each section of the urban underground loop is provided with a vehicle access 1 and an underground garage access 2, the ventilation system comprises a semi-transverse air supply system and a key smoke exhaust system, the semi-transverse air supply system comprises an air supply duct 3 and an air feeder room 4, the air supply duct is laid along the top of the urban underground loop, the air supply duct is divided into a plurality of sections of ducts by partition plates 5, the air feeder rooms are respectively arranged corresponding to each section of air supply duct and communicated with the corresponding air supply duct, and air supply ports 6 are arranged on the air supply duct at intervals; the key smoke exhaust system comprises a smoke exhaust duct 7 and a smoke exhaust machine room 8, wherein the smoke exhaust duct is laid along the top of the urban underground loop, the smoke exhaust machine room is arranged on two sides of the smoke exhaust duct and communicated with the smoke exhaust duct, and smoke exhaust ports 9 are arranged on the smoke exhaust duct at intervals.
The blower room is internally provided with a blower 10, and the smoke exhaust machine room is internally provided with two smoke exhaust fans 11 which are used and prepared.
The interval between two adjacent air supply openings is 25-35m, and the interval between two adjacent smoke exhaust openings is 55-65 m.
The air supply opening is a single-layer shutter air opening, and the smoke outlet is a normally closed air opening.
Example one
The urban underground loop ventilation system adopts a scheme of semi-transverse air supply and key smoke exhaust, an air supply and smoke exhaust duct is arranged at the top of a tunnel along the urban underground loop, and two air supply machine rooms and two smoke exhaust machine rooms are arranged at two ends of the urban underground loop. In normal times, a semi-transverse air supply mode is adopted, and exhaust air is exhausted to the outside from an underground garage or an inlet and an outlet of a loop by means of positive pressure of an urban underground loop. The semi-transverse air supply system is provided with two ventilation sections according to the length of the tunnel, each ventilation section is provided with one set of air supply system and one air supply fan room, and one air supply fan is arranged in each air supply fan room. The air output of the semi-transverse air supply system is a large value according to the air demand for diluting CO and diluting smoke according to the design rules of highway tunnel ventilation (JTGT D702-02-2014). The wind pressure of the semi-transverse air supply system is calculated according to a full pressure calculation formula of the semi-transverse air supply system of the Highway tunnel Ventilation design rules (JTGT D702-02-2014). The key smoke exhaust system is provided with two smoke exhaust machine rooms at two ends of an underground loop. Two smoke exhaust fans are respectively arranged in the two smoke exhaust machine rooms, and one fan is used and the other fan is equipped. And in case of fire, the machine rooms at two ends are respectively provided with one smoke exhaust fan. Maximum fire heat release power is according to the design Specification of urban underground road engineering
(CJJ 221-2015). The air quantity required for fire smoke discharge of key smoke discharge is calculated according to the maximum fire heat release power, and the air pressure is calculated according to the total pressure calculation principle of the exhaust type fan.
A single-layer shutter air supply opening is arranged at each 30m of semi-transverse air supply, and a high-closed type smoke exhaust opening is arranged at each 60m of key smoke exhaust. And under the normal operation condition, the blower of the corresponding ventilation section is controlled to operate in an interlocking manner according to the CO value and the VI value. The underground loop and the fireproof roller shutters in front of the garages are opened, and the tunnel can exhaust air through the entrances and exits of the loop and the garages. Under the working condition of fire, the underground loop and the fireproof roller shutters in front of each garage are closed, the smoke exhaust system opens six high-closed type air ports near a fire point, and two smoke exhaust fans are respectively opened at two ends of the smoke exhaust system to exhaust smoke through a smoke exhaust channel. The air supplement is naturally performed through three inlets and outlets which are directly communicated with the outside.
The embodiment can effectively organize the air flow in the tunnel and improve the air quality in the tunnel under the normal operation working condition. Under the normal working condition, a semi-transverse air supply scheme is adopted, so that the nearby scattered pollution discharge of the passageway of each vehicle and the connecting channel of the underground garage is fully utilized, the pollutant concentration of each discharge port is low, and the influence on the surrounding environment is small; and the influence of high tower exhaust air required by centralized exhaust air on peripheral buildings and construction cost can be effectively solved by adopting a semi-transverse air supply scheme, and the economic benefit is good. Under the fire working condition, the underground loop adopts a key smoke exhaust scheme, smoke is exhausted into a smoke exhaust duct nearby, the smoke is prevented from spreading in the tunnel, and the smoke exhaust effect is good.
The ventilation system of the utility model is suitable for urban underground loops (also called underground garage connecting channels) which are only limited to pass cars and small trucks; the system is suitable for the condition that the length of the main loop of the underground loop is less than 1.5km, and when the length of the main loop is more than 1.5km, the system can be adopted, and an air exhaust fan room and a corresponding ventilation section are correspondingly added.
Although the present invention has been described in detail with reference to the embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the utility model.
Claims (4)
1. A ventilation system for an urban underground loop is characterized by comprising a semi-transverse air supply system and a key smoke exhaust system, wherein each section of the urban underground loop is provided with a vehicle access and an underground garage access; the key smoke exhaust system comprises a smoke exhaust duct and a smoke exhaust machine room, wherein the smoke exhaust duct is laid along the top of the urban underground loop, the smoke exhaust machine room is arranged on two sides of the smoke exhaust duct and communicated with the smoke exhaust duct, and smoke exhaust ports are arranged on the smoke exhaust duct at intervals.
2. A ventilation system for an urban underground loop according to claim 1, wherein a blower is provided in the blower room, and two smoke exhaust fans are provided in the smoke exhaust room, one for each other.
3. A ventilation system for an urban underground loop according to claim 2, wherein the interval between two adjacent air supply ports is 25-35m, and the interval between two adjacent smoke exhaust ports is 55-65 m.
4. The ventilation system for the urban underground loop according to claim 3, wherein the air supply opening is a single-layer louver opening, and the smoke exhaust opening is a normally closed type opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122741258.5U CN216277968U (en) | 2021-11-10 | 2021-11-10 | Ventilation system for urban underground loop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122741258.5U CN216277968U (en) | 2021-11-10 | 2021-11-10 | Ventilation system for urban underground loop |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216277968U true CN216277968U (en) | 2022-04-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122741258.5U Active CN216277968U (en) | 2021-11-10 | 2021-11-10 | Ventilation system for urban underground loop |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216277968U (en) |
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2021
- 2021-11-10 CN CN202122741258.5U patent/CN216277968U/en active Active
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