CN107605526B - Highway tunnel segmentation key smoke discharging system and smoke discharging method - Google Patents
Highway tunnel segmentation key smoke discharging system and smoke discharging method Download PDFInfo
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- CN107605526B CN107605526B CN201711020305.9A CN201711020305A CN107605526B CN 107605526 B CN107605526 B CN 107605526B CN 201711020305 A CN201711020305 A CN 201711020305A CN 107605526 B CN107605526 B CN 107605526B
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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
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
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Abstract
The invention provides a highway tunnel sectional key smoke discharging system and a smoke discharging method, wherein the system comprises the following steps: at the top of 1 st row owner hole, set up a plurality of furred ceiling wind channel along vertically according to certain interval, the service tunnel top sets up main discharge flue, and every furred ceiling wind channel all corresponds and sets up a horizontal communication flue, one end and furred ceiling wind channel intercommunication, the other end and main discharge flue intercommunication. The advantages are that: because the invention is provided with the plurality of independent suspended ceiling air channels at the top of the main hole, the suspended ceiling air channels have stronger bearing capacity, and the area of the electric smoke outlet arranged at the bottom can be enlarged to 50m 2 The longitudinal distance can reach 1000m, the number of electric smoke outlets is reduced, and a smoke discharging control plan is simplified. The main exhaust flue serves the left tunnel and the right tunnel, and one main exhaust flue is reduced. The main exhaust flue does not occupy the space of the main tunnel, reduces the wind speed of the tunnel and improves the operation economy. Therefore, the invention simplifies the traditional key smoke discharging scheme, and has lower engineering cost, simpler system operation and smaller post maintenance.
Description
Technical Field
The invention belongs to the technical field of transportation and equipment, and particularly relates to a highway tunnel segmentation key smoke discharging system and a smoke discharging method.
Background
For underwater tunnels and urban tunnelsBecause of considering the smoke control requirement under the fire working condition, a key smoke discharging system is generally adopted, as shown in fig. 1, which is a schematic diagram of a traditional key smoke discharging system, the scheme adopted by the key smoke discharging system is as follows: a main exhaust flue is arranged at the top of a main hole of the travelling crane along the longitudinal direction, and smoke exhaust fans 6 are respectively arranged at two ends of the main exhaust flue, wherein the longitudinal direction is the travelling crane direction; in order to achieve a certain smoke discharging effect, a dense electric smoke outlet 1 is required to be arranged on the main smoke discharging flue, and is generally arranged at a position of about 60 m; in addition, the size of the smoke outlet is small, and the area of the electric smoke outlet is about 6m 2 . Therefore, under the fire working condition, the electric smoke outlet at the corresponding position is opened, so that key smoke discharge of the fire area is realized. Compared with a longitudinal ventilation system, the smoke spreading area can be effectively controlled, and the personnel evacuation safety is greatly improved.
However, the key smoke evacuation system described above has the following disadvantages:
(1) Because a plurality of electric smoke outlets are arranged, the system is complex to control, and the later maintenance workload is increased;
(2) Because the main exhaust flue is arranged at the top of the main hole of the traveling crane, the main exhaust flue occupies the space of the main hole of the traveling crane, so that the space of the main hole of the traveling crane is reduced, the wind speed is increased under the condition that the wind quantity is unchanged, and the energy consumption of the fan is increased under the normal operation ventilation working condition. If the wind speed is increased by 1.2 times, the power consumption is increased by 72.8%, and the power consumption is remarkable;
(3) For the main exhaust flue arranged at the top of the main hole of the traveling crane, the length of the main exhaust flue along the longitudinal direction is generally similar to that of the main hole of the traveling crane, so that the length of the main exhaust flue is longer, and the integral stability of a building structure is ensured, thereby the area of a single electric exhaust port is limited, and the smoke discharging capacity of the single electric exhaust port is limited; therefore, when a fire disaster occurs in a certain position of a main hole of a traveling vehicle, a plurality of groups of electric smoke outlets adjacent to a fire source point are required to be opened, usually 4-5 groups, because the area of a single electric smoke outlet is limited, and because the distances from a fan are different, the smoke discharging amount of the single electric smoke outlet is difficult to control, for example, the smoke discharging amount of the electric smoke outlet close to the fan is larger, and the smoke discharging amount of the electric smoke outlet far from the fan is smaller, so that the smoke discharging effect and the smoke discharging efficiency of the whole system are reduced; in addition, the quantity of the electric smoke outlets is large, so that the air leakage quantity of the electric smoke outlets along the journey is not easy to control, and the later maintenance quantity of the system is large; only when the system is well maintained and the operation level of operators is very high, a good smoke discharging effect can be realized.
Therefore, how to study a ventilation and smoke discharging scheme which can meet the smoke discharging requirement, has simple system, small maintenance and simplified control scheme is a requirement for industry development.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention provides a highway tunnel segmentation key smoke discharging system and a smoke discharging method, which can effectively solve the problems.
The technical scheme adopted by the invention is as follows:
the invention provides a highway tunnel sectional key smoke discharging system, wherein a plurality of suspended ceiling air channels (9) are arranged at the top of a main hole (5) of a 1 st row at certain intervals along the longitudinal direction, each suspended ceiling air channel (9) is of an independent structure, an electric smoke outlet (1) is formed in the bottom of each suspended ceiling air channel (9), and when the electric smoke outlet (1) is opened, air flow in the main hole (5) of the 1 st row enters the suspended ceiling air channels (9) through the electric smoke outlet (1);
a service tunnel (3) parallel to a main hole (5) of the 1 st row is arranged, a main exhaust flue (4) is arranged at the top of the service tunnel (3), the length of the main exhaust flue (4) is the same as that of the service tunnel (3), and smoke exhaust fans (6) are respectively arranged at the front end and the rear end of the main exhaust flue (4);
every furred ceiling wind channel (9) all corresponds and sets up a horizontal communication flue (2), the one end of horizontal communication flue (2) with furred ceiling wind channel (9) intercommunication, the other end of horizontal communication flue (2) with main discharge flue (4) intercommunication.
Preferably, the exhaust port area of the electric exhaust port (1) is 40m 2 ～60m 2 The method comprises the steps of carrying out a first treatment on the surface of the The longitudinal distance between the adjacent electric smoke outlets (1) is 1000 m-2000 m.
Preferably, the number of the electric smoke outlets (1) formed in the bottom of each suspended ceiling air duct (9) is 1 group.
Preferably, the height of the main exhaust flue (4) is lower than the height of the suspended ceiling air duct (9); the transverse connecting flue (2) is of a tetrahedral structure and comprises: top, bottom, front and back sides; two ends of the top surface are respectively connected with the top of the suspended ceiling air duct (9) and the top of the main exhaust flue (4); the two ends of the bottom surface are respectively connected with the bottom of the suspended ceiling air duct (9) and the bottom of the main exhaust flue (4), so that the transverse connecting flue (2) forms a structure with the cross section area gradually enlarged from the suspended ceiling air duct (9) to the main exhaust flue (4).
Preferably, for the case of arranging an escape channel communicating the main hole (5) of the 1 st row with the service tunnel (3), the transverse connecting flue (2) is arranged right above the escape channel and is combined, and unified treatment is performed structurally.
Preferably, a plurality of fire detectors, wind speed and direction detectors and a plurality of reversible rotating jet fans (7) are longitudinally arranged in the main hole (5) of the 1 st row; the fire detector, the jet fan (7), the electric smoke outlet (1), the wind speed and direction detector and the smoke exhaust fan (6) are all connected with a control center.
Preferably, the vehicle further comprises a main hole (8) of the 2 nd row; the 2 nd traveling main hole (8) and the 1 st traveling main hole (5) are respectively arranged at two sides of the service tunnel (3); the 2 nd main driving hole (8) is provided with a highway tunnel sectional key smoke discharging system symmetrical to the 1 st main driving hole (5).
The invention also provides a highway tunnel sectional key smoke discharging method based on the highway tunnel sectional key smoke discharging system, which comprises the following steps:
step 1, fire detectors at different positions in a main hole (5) of a 1 st traveling vehicle detect whether fire occurs at corresponding positions in real time, and when the fire is detected, the fire source position information and the fire disaster information are sent to a control center;
step 2, the control center positions a group of electric smoke outlets (1) closest to the fire source position according to the fire source position; and simultaneously performs the following three operations:
operation 1, opening the positioned electric smoke outlet (1);
2, starting a jet fan (7) positioned at the upstream of the positioned electric smoke outlet (1) and in an upstream section beyond a fire point 200m, and adjusting the number of the jet fans (7) to be started according to wind speed and wind direction detection data of a wind speed and wind direction detector of the upstream section so as to adjust the longitudinal wind speed of the upstream section, so that the upstream jet fan (7) blows air towards the direction of the fire point to blow air towards the longitudinal wind speed of the fire point, and preventing smoke from flowing backwards;
starting a jet fan (7) positioned at the downstream of the positioned electric smoke outlet (1) and at a downstream section except a fire source point 200m, reversely running, adjusting the number of the jet fans (7) to be started according to wind speed and wind direction detection data of a wind speed and wind direction detector at the downstream section, further adjusting the longitudinal wind speed of the downstream section, enabling the downstream jet fan (7) to reversely rotate, controlling smoke within a certain distance from the fire source point, and limiting the spreading range of the smoke;
3, judging whether the fire source point is positioned at the longitudinal center of the main hole (5) of the 1 st row, and if so, starting the smoke exhaust fans (6) at the two ends to perform concentrated smoke exhaust at the two ends; otherwise, starting a smoke exhaust fan close to the fire source point to exhaust smoke on one side;
and 3, enabling the smoke at the upstream of the fire source point position and the smoke at the downstream of the fire source point position to flow and gather towards the fire source point position, discharging the smoke into a corresponding suspended ceiling air duct (9) through the positioned electric smoke outlet (1), discharging the smoke into a main discharge flue (4) through a corresponding transverse connecting flue (2), and finally discharging the smoke to the external environment under the action of a smoke discharging fan (6).
The highway tunnel segmentation key smoke discharging system and the smoke discharging method provided by the invention have the following advantages:
because the suspended ceiling air duct with a plurality of independent structures is arranged at the top of the main hole of the traveling crane, the suspended ceiling air duct has stronger bearing capacity, and the area of the electric smoke outlet arranged at the bottom of the suspended ceiling air duct can be enlarged to 50m 2 (left and right)The longitudinal distance between the electric smoke outlets can reach about 1000m, so that the number of the electric smoke outlets is obviously reduced, and the invention simplifies the traditional key smoke discharging scheme, and has lower engineering cost, simpler system operation and smaller post maintenance.
Drawings
FIG. 1 is a schematic diagram of a prior art highway tunnel focused smoke evacuation system;
FIG. 2 is a three-dimensional schematic diagram of a highway tunnel segmentation focus smoke evacuation system provided by the invention;
FIG. 3 is a front view of a highway tunnel segmentation focus smoke evacuation system provided by the invention;
FIG. 4 is a schematic illustration of the addition of the source point locations and airflow direction to FIG. 3;
wherein:
1-electric smoke outlet, 2-transverse connecting flue, 3-service tunnel, 4-main smoke outlet, 5-1 st row main hole, 6-smoke exhaust fan, 7-jet fan, 8-2 nd row main hole, 9-suspended ceiling air duct and 10-fire source point.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects solved by the invention more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The invention provides a highway tunnel sectional key smoke discharging system which mainly comprises a main smoke discharging flue longitudinally arranged at the top of a service tunnel and a transverse connecting flue arranged between the main smoke discharging flue and a suspended ceiling air duct at the top of a driving main tunnel, wherein an electric smoke discharging port is formed at the bottom of each suspended ceiling air duct; therefore, under the fire working condition, the sectional key smoke discharge of the fire area is realized by opening the smoke discharge fans at the two ends of the main smoke discharge duct and the electric smoke discharge ports corresponding to the transverse connecting smoke ducts of the fire area, and the personnel evacuation safety is ensured. In traditional key smoke discharging scheme, electric smoke discharging port is arranged on main smoke discharging flue at top of main hole of travelling vehicle, and ruler of electric smoke discharging port is used for guaranteeing ventilation effect and stability of building structure of main smoke discharging flueSmaller size, typically 6m 2 Further, the electric smoke outlets are densely arranged, and one electric smoke outlet is generally arranged at a pitch of about 60m, thereby having various disadvantages. In the invention, the ceiling air duct with a plurality of independent structures is arranged at the top of the main hole of the traveling crane, and the ceiling air duct is shorter in longitudinal length, so that the bearing capacity is stronger, and the area of the electric smoke outlet arranged at the bottom of the ceiling air duct can be enlarged to 50m 2 The longitudinal distance between the electric smoke outlets can reach about 1000m, and the smoke discharging effect is basically similar. The scheme has the outstanding advantages of low engineering cost, simple system constitution, flexible control, small post maintenance amount and the like. The scheme can effectively control the smoke diffusion distance, improves the capability of the tunnel smoke exhaust system for coping with accidents, and can be applied to highway tunnel engineering with higher requirements on tunnel operation safety, such as urban tunnels, underwater tunnels and the like.
In combination with fig. 2 and 3, the invention provides a highway tunnel sectional key smoke discharging system, a plurality of suspended ceiling air channels 9 are arranged at the top of a main hole 5 of a 1 st row of vehicles at certain intervals along the longitudinal direction, each suspended ceiling air channel 9 is of an independent structure, and the suspended ceiling air channels are shorter along the longitudinal length, so that the bearing capacity of the suspended ceiling air channels is stronger, the bottom of each suspended ceiling air channel 9 is provided with an electric smoke outlet 1, and the invention adopts the suspended ceiling air channels, and the bearing capacity of the suspended ceiling air channels is strong, so that the smoke outlet area of the electric smoke outlet 1 can be increased to 40m 2 ～60m 2 The method comprises the steps of carrying out a first treatment on the surface of the The longitudinal distance between adjacent electric smoke outlets 1 is 1000 m-2000 m, so that the arrangement number of the electric smoke outlets is far lower than that of the traditional arrangement scheme, the control complexity of the system is reduced, and the system is convenient for later maintenance. When the electric smoke outlet 1 is opened, air flow in the main hole 5 of the 1 st row enters the suspended ceiling air duct 9 through the electric smoke outlet 1;
the service tunnel 3 parallel to the main tunnel 5 of the 1 st row is arranged, the main exhaust flue 4 is arranged at the top of the service tunnel 3, the area of the main exhaust flue is calculated according to the concentrated smoke exhaust amount and the smoke exhaust wind speed, the smoke exhaust wind speed of the main exhaust flue is generally not more than 15m/s, and the smoke exhaust amount can be calculated according to different smoke diffusion models. The length of the main exhaust flue 4 is the same as that of the service tunnel 3, one or more smoke exhaust fans 6 are respectively arranged at the front end and the rear end of the main exhaust flue 4, and the smoke exhaust fans 6 can be axial flow smoke exhaust fans.
Each suspended ceiling air duct 9 is correspondingly provided with a transverse connecting flue 2, one end of the transverse connecting flue 2 is communicated with the suspended ceiling air duct 9, and the other end of the transverse connecting flue 2 is communicated with the main exhaust flue 4. The transverse connecting air channels are connected with the main exhaust flue at regular intervals, and the common interval is about 1000 m. Can be adjusted according to the evaluation conclusion of the personnel evacuation safety. In practical engineering, since a plurality of escape passages, such as a pedestrian crossing or a vehicular crossing, are generally required to be arranged between the main tunnel and the service tunnel, at this time, a transverse connecting flue can be arranged in combination with the escape passages, namely: the transverse connecting flue is arranged right above the escape passage and is combined, so that unified treatment is carried out structurally, the construction difficulty is reduced, and the civil construction cost is further reduced.
In practical application, the height of the main exhaust flue 4 is lower than that of the suspended ceiling air duct 9; the transverse connecting flue 2 is of a tetrahedral structure and comprises: top, bottom, front and back sides; two ends of the top surface are respectively connected with the top of the suspended ceiling air duct 9 and the top of the main exhaust flue 4; the two ends of the bottom surface are respectively connected with the bottom of the suspended ceiling air duct 9 and the bottom of the main exhaust flue 4, so that the transverse connecting flue 2 forms a structure with the cross section area gradually enlarged from the suspended ceiling air duct 9 to the main exhaust flue 4. The transverse connecting flue with the structural form is adopted, so that the maximum area of the transverse air channel of the connecting flue is realized, the wind speed is minimum, and the energy consumption is minimum.
A plurality of fire detectors, wind speed and direction detectors and a plurality of jet fans 7 which can bidirectionally and reversibly rotate are arranged in the main hole 5 of the 1 st row along the longitudinal direction; the fire detector, the jet fan 7, the electric smoke outlet 1, the wind speed and direction detector and the smoke exhaust fan 6 are all connected to a control center, so that remote control is realized. Under the fire working condition, the electric smoke outlet of the fire disaster area is opened through the schemes such as PLC, hard wire connection and the like, so that the area can be subjected to key smoke discharging. The area of the electric smoke outlet is determined according to the smoke discharge amount and the smoke discharge wind speed. The exhaust wind speed of the electric smoke outlet is generally not more than 15m/s. Because the number of the electric smoke outlets is greatly reduced, the adverse region of the structure can be well avoided.
The meaning of setting up the efflux fan is: and under the fire working condition, the jet fans at the upper and lower streams of the fire source point are required to be controlled simultaneously, so that the longitudinal wind speed of the tunnel is controlled. In the stage of personnel evacuation, the upstream wind speed is generally 1.5m/s, the downstream reverse wind speed is 0.5-1 m/s, and specific numerical values need to be calculated and analyzed.
The highway tunnel segmentation key smoke discharging system is applied to an arrangement mode related to a main driving tunnel and 1 service tunnel. In implementation application, two main driving holes are generally arranged in parallel, and a service tunnel is arranged between the two main driving holes, namely: the vehicle further comprises a main hole 8 of the 2 nd row; the 2 nd row main hole 8 and the 1 st row main hole 5 are respectively arranged at two sides of the service tunnel 3; the main hole 8 of the 2 nd row is provided with a highway tunnel segmentation key smoke discharging system symmetrical to the main hole 5 of the 1 st row. At this time, two driving main holes share the same main discharge flue arranged in the service tunnel, so that the number of the main discharge flues is reduced, and the manufacturing cost of the system is reduced. When the traditional smoke exhaust system is adopted, when two main holes of the pedestrians are arranged, the top of each main hole of the pedestrians is required to be provided with a main smoke exhaust channel. Thereby also embodying the innovations of the present invention.
As shown in fig. 4, the invention further provides a highway tunnel sectional key smoke discharging method based on a highway tunnel sectional key smoke discharging system, which comprises the following steps:
step 1, fire detectors at different positions in a main hole 5 of a 1 st traveling vehicle detect whether fire occurs at corresponding positions in real time, and when the fire is detected to occur, the fire source position information and the fire disaster information are sent to a control center;
step 2, the control center positions a group of electric smoke outlets 1 closest to the fire source position according to the fire source position; and simultaneously performs the following three operations:
operation 1, opening the positioned electric smoke outlet 1;
2, starting a jet fan 7 positioned at the upstream of the positioned electric smoke outlet 1 and in an upstream section beyond a fire point 200m, adjusting the number of opening jet fans according to wind speed and wind direction detection data fed back by a wind speed and wind direction detector of the upstream section, and further adjusting the longitudinal wind speed of the upstream section to enable the upstream jet fan to blow towards the direction of the fire point, so as to blow towards the longitudinal wind speed of the fire point, prevent smoke from flowing reversely, and ensure the safety of personnel behind the fire point;
starting a jet fan 7 positioned at the downstream of the positioned electric smoke outlet 1 and at a downstream section except a fire point 200m, reversely running, adjusting the number of the jet fan 7 to be started according to wind speed and wind direction detection data of a wind speed and wind direction detector at the downstream section, further adjusting the longitudinal wind speed of the downstream section, reversely rotating the downstream jet fan 7, controlling smoke within a certain distance from the fire point, limiting the spreading range of the smoke to the downstream, and improving the key smoke discharging effect;
3, judging whether the fire source point is positioned at the longitudinal center position of the 1 st running main hole 5, if so, starting the smoke exhaust fans 6 at the two ends at the same time to perform concentrated smoke exhaust at the two ends; otherwise, starting a smoke exhaust fan close to the fire source point to exhaust smoke on one side;
and 3, the smoke at the upstream of the fire source position and the smoke at the downstream of the fire source position flow and gather towards the fire source position, are discharged into the corresponding suspended ceiling air duct 9 through the positioned electric smoke outlet 1, are further discharged into the main smoke outlet 4 through the corresponding transverse connecting smoke channel 2, and are finally discharged to the external environment under the action of the smoke exhaust fan 6.
Therefore, under the fire disaster working condition, only one electric smoke outlet closest to the fire source position is opened, the electric smoke outlets in other areas are kept in a closed state, meanwhile, the downstream jet fan is reversely rotated by opening the upstream jet fan and the downstream jet fan of the fire source, smoke in the main hole of the traveling vehicle is gathered to the electric smoke outlet closest to the fire source position, the smoke flue is discharged to the main smoke flue through the transverse connecting flue, and the smoke is discharged to the outside in a concentrated mode, so that the smoke discharging effect is improved. Because the area of the electric smoke outlet is large, the invention can meet the smoke discharging requirement of the main hole of the walker by only opening one electric smoke outlet, solves the adverse effect caused by the fact that a plurality of electric smoke outlets are required to be opened in the traditional scheme, solves the problem of complex control scheme, and simplifies the control flow.
Therefore, the highway tunnel segmentation key smoke discharging system and the smoke discharging method provided by the invention have the following advantages:
(1) Because the suspended ceiling air duct with a plurality of independent structures is arranged at the top of the main hole of the traveling crane, the suspended ceiling air duct has stronger bearing capacity, and the area of the electric smoke outlet arranged at the bottom of the suspended ceiling air duct can be enlarged to 50m 2 The longitudinal distance between the electric smoke outlets can reach about 1000m, so that the number of the electric smoke outlets and the number of control points are obviously reduced, and the traditional key smoke discharging scheme is simplified, the engineering cost is lower, the system operation is simpler, and the later maintenance amount is smaller;
(2) The main exhaust flue is arranged at the top of the service tunnel, so that the main exhaust flue does not occupy the space of the main tunnel of the travelling crane, and compared with the traditional scheme, the wind speed is reduced under the condition that the wind quantity is unchanged, so that the energy consumption of the fan is obviously reduced;
(3) The fire disaster working condition of the invention only needs to open a final group of electric smoke outlets at fire source points to discharge smoke, and compared with the traditional key smoke discharging scheme, 4-5 groups of electric smoke outlets at fire source points are opened (the number of the opening groups at the upstream and downstream of the fire source points can be changed according to different tunnel gradients), the control scheme is simple and clear, and the reaction speed of operators and the requirements of professional literacy are improved.
(4) The main exhaust flue can be shared by left and right lines, so that one main exhaust flue is reduced, and the construction cost and the later maintenance amount are reduced; for tunnels of about 3000m, the cost is reduced by about 2000 ten thousand.
(5) Because the area of the electric smoke outlet is larger, the invention can meet the smoke discharging requirement of a main hole of a traveling vehicle by only opening one electric smoke outlet, and solves the problem of low smoke discharging efficiency caused by different smoke discharging amounts of the electric smoke outlets at different positions due to different longitudinal distances from a fire source point in the traditional scheme;
(6) The invention improves the smoke discharging capability of a single electric smoke outlet, and has stronger smoke discharging capability under the condition of larger longitudinal wind speed and the condition of out-of-control fire.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which is also intended to be covered by the present invention.
Claims (6)
1. A highway tunnel sectional key smoke discharging method based on a highway tunnel sectional key smoke discharging system is characterized in that the highway tunnel sectional key smoke discharging system is as follows: a plurality of suspended ceiling air channels (9) are arranged at the top of a main hole (5) of the 1 st row at certain intervals along the longitudinal direction, each suspended ceiling air channel (9) is of an independent structure, an electric smoke outlet (1) is formed in the bottom of each suspended ceiling air channel (9), and when the electric smoke outlet (1) is opened, air flow in the main hole (5) of the 1 st row enters the interior of the suspended ceiling air channel (9) through the electric smoke outlet (1);
a service tunnel (3) parallel to a main hole (5) of the 1 st row is arranged, a main exhaust flue (4) is arranged at the top of the service tunnel (3), the length of the main exhaust flue (4) is the same as that of the service tunnel (3), and smoke exhaust fans (6) are respectively arranged at the front end and the rear end of the main exhaust flue (4);
each suspended ceiling air duct (9) is correspondingly provided with a transverse connecting flue (2), one end of each transverse connecting flue (2) is communicated with each suspended ceiling air duct (9), and the other end of each transverse connecting flue (2) is communicated with the main exhaust flue (4);
the height of the main exhaust flue (4) is lower than that of the suspended ceiling air duct (9); the transverse connecting flue (2) is of a tetrahedral structure and comprises: top, bottom, front and back sides; two ends of the top surface are respectively connected with the top of the suspended ceiling air duct (9) and the top of the main exhaust flue (4); the two ends of the bottom surface are respectively connected with the bottom of the suspended ceiling air duct (9) and the bottom of the main exhaust flue (4), so that the transverse connecting flue (2) forms a structure with the cross section area gradually enlarged from the suspended ceiling air duct (9) to the main exhaust flue (4);
the highway tunnel segmentation key smoke discharging method comprises the following steps:
step 1, fire detectors at different positions in a main hole (5) of a 1 st traveling vehicle detect whether fire occurs at corresponding positions in real time, and when the fire is detected, the fire source position information and the fire disaster information are sent to a control center;
step 2, the control center positions a group of electric smoke outlets (1) closest to the fire source position according to the fire source position; and simultaneously performs the following three operations:
operation 1, opening the positioned electric smoke outlet (1);
2, starting a jet fan (7) positioned at the upstream of the positioned electric smoke outlet (1) and in an upstream section beyond a fire point 200m, and adjusting the number of the jet fans (7) to be started according to wind speed and wind direction detection data of a wind speed and wind direction detector of the upstream section so as to adjust the longitudinal wind speed of the upstream section, so that the upstream jet fan (7) blows air towards the direction of the fire point to blow air towards the longitudinal wind speed of the fire point, and preventing smoke from flowing backwards;
starting a jet fan (7) positioned at the downstream of the positioned electric smoke outlet (1) and at a downstream section except a fire source point 200m, reversely running, adjusting the number of the jet fans (7) to be started according to wind speed and wind direction detection data of a wind speed and wind direction detector at the downstream section, further adjusting the longitudinal wind speed of the downstream section, enabling the downstream jet fan (7) to reversely rotate, controlling smoke within a certain distance from the fire source point, and limiting the spreading range of the smoke;
3, judging whether the fire source point is positioned at the longitudinal center of the main hole (5) of the 1 st row, and if so, starting the smoke exhaust fans (6) at the two ends to perform concentrated smoke exhaust at the two ends; otherwise, starting a smoke exhaust fan close to the fire source point to exhaust smoke on one side;
and 3, enabling the smoke at the upstream of the fire source point position and the smoke at the downstream of the fire source point position to flow and gather towards the fire source point position, discharging the smoke into a corresponding suspended ceiling air duct (9) through the positioned electric smoke outlet (1), discharging the smoke into a main discharge flue (4) through a corresponding transverse connecting flue (2), and finally discharging the smoke to the external environment under the action of a smoke discharging fan (6).
2. The highway tunnel sectional key smoke discharging method based on the highway tunnel sectional key smoke discharging system according to claim 1, wherein the smoke discharging opening area of the electric smoke discharging opening (1) is 40m 2 ～60m 2 The method comprises the steps of carrying out a first treatment on the surface of the The longitudinal distance between the adjacent electric smoke outlets (1) is 1000 m-2000 m.
3. The highway tunnel sectional key smoke exhaust method based on the highway tunnel sectional key smoke exhaust system according to claim 1, wherein the number of electric smoke exhaust ports (1) formed at the bottom of each suspended ceiling air duct (9) is 1 group.
4. The highway tunnel sectional key smoke evacuation method based on the highway tunnel sectional key smoke evacuation system according to claim 1, wherein for the case of arranging an escape passage communicating the 1 st row main hole (5) and the service tunnel (3), the transverse connecting flue (2) is arranged right above the escape passage and is combined and arranged, and structurally unified processing is performed.
5. The highway tunnel sectional key smoke discharging method based on the highway tunnel sectional key smoke discharging system according to claim 1, wherein a plurality of fire detectors, wind speed and direction detectors and a plurality of reversible rotary jet fans (7) are longitudinally arranged in the main tunnel (5) of the 1 st row; the fire detector, the jet fan (7), the electric smoke outlet (1), the wind speed and direction detector and the smoke exhaust fan (6) are all connected with a control center.
6. The highway tunnel segmentation focus smoke evacuation method based on the highway tunnel segmentation focus smoke evacuation system according to claim 1, further comprising a 2 nd row main hole (8); the 2 nd traveling main hole (8) and the 1 st traveling main hole (5) are respectively arranged at two sides of the service tunnel (3); the 2 nd main driving hole (8) is provided with a highway tunnel sectional key smoke discharging system symmetrical to the 1 st main driving hole (5).
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| CN201711020305.9A CN107605526B (en) | 2017-10-27 | 2017-10-27 | Highway tunnel segmentation key smoke discharging system and smoke discharging method |
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| CN201711020305.9A CN107605526B (en) | 2017-10-27 | 2017-10-27 | Highway tunnel segmentation key smoke discharging system and smoke discharging method |
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| CN107605526B true CN107605526B (en) | 2023-08-22 |
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| CN109707395B (en) * | 2019-01-17 | 2024-01-16 | 中铁第四勘察设计院集团有限公司 | Double-layer shield tunnel with upper and lower layer discharge flues and discharge flue setting method |
| CN110778351B (en) * | 2019-11-27 | 2021-12-31 | 武汉中交交通工程有限责任公司 | Combined ventilation and smoke exhaust method for urban underground intercommunication tunnel |
| CN111720153B (en) * | 2020-06-10 | 2021-11-16 | 中铁第五勘察设计院集团有限公司 | Tunnel smoke exhaust system |
| CN111720151B (en) * | 2020-06-10 | 2021-10-22 | 中铁第五勘察设计院集团有限公司 | Tunnel structure with rectangular cross section |
| CN111720152B (en) * | 2020-06-10 | 2022-02-01 | 中铁第五勘察设计院集团有限公司 | Tunnel smoke exhaust system and tunnel smoke exhaust control method |
| CN112802389A (en) * | 2021-01-15 | 2021-05-14 | 武汉科技大学 | Multifunctional tunnel fire test platform with communication flue |
| CN114333189A (en) * | 2021-12-08 | 2022-04-12 | 湛江市珠江电力设备安装有限公司 | Emergent evacuation passageway of electric power engineering fire control based on big data |
| CN116229659B (en) * | 2023-05-08 | 2023-09-12 | 四川省交通勘察设计研究院有限公司 | Tunnel traffic control system and traffic control method suitable for low-grade highway |
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