An underground fan room system shared by double-track tunnels

Abstract

The present invention discloses an underground fan room system shared by a double-track tunnel, comprising a double-track tunnel and an underground fan room arranged outside the double-track tunnel; the underground fan room is provided with an air supply duct, an exhaust duct and a natural wind duct; the wind ducts all pass through the underground fan room, an axial flow fan is arranged at the intersection of the air supply duct, the exhaust duct and the fan room, and the end of the wind duct away from the tunnel is connected with the ventilation cross tunnel; the other end of the air supply duct is connected to the right-track tunnel through a right-line air supply port, and a left-line air supply port is arranged in the middle of the part of the air supply duct connecting the underground fan room and the right-line air supply port to connect to the left-track tunnel; the other end of the exhaust duct is connected to the right-track tunnel through a right-line exhaust port, and a left-line exhaust port is arranged in the middle of the part of the exhaust duct connecting the underground fan room and the right-line exhaust port to connect to the left-track tunnel; the natural wind duct comprises a natural wind duct and a transportation channel; the double-track tunnel shared ventilation system of the present invention reduces the number of lanes, improves the utilization rate of fans, can effectively reduce the complexity of the project, reduce the project cost, and shorten the construction period.

Description

Technical Field

[0001] The invention relates to the field of highway tunnels, and in particular to an underground fan room system shared by a double-track tunnel. Background Art

[0002] When cars pass through a tunnel, they will continuously emit exhaust gas into the tunnel. When the tunnel is relatively short, the exhaust gas will not accumulate too high in the tunnel due to the influence of natural wind and traffic wind; when the tunnel is long, the exhaust gas will accumulate in the tunnel. When the exhaust gas concentration reaches a certain level, it will affect people's comfort and reduce visibility in the tunnel.

[0003] Longitudinal segmented mechanical ventilation, which uses fan rooms to supply and exhaust air in segments, is currently a common way to solve the above problems in long and large highway tunnels. Underground and above-ground fan rooms can be set up according to ground geological conditions. For difficult and complex mountainous areas, there are often no conditions for setting up above-ground fan rooms. Although underground fan rooms are large in scale, have high construction risks, and high investment costs, they have become a last resort for long and large highway tunnels.

[0004] At present, most underground fan rooms are set up in the form of underground fan rooms. Taking the shared ventilation tunnel as an example, the ventilation system includes the ventilation tunnel and the underground fan room, where the ventilation tunnel is connected to the ground, and the underground fan room and the laneway are connected to the ventilation tunnel and the left and right main tunnels. The fan room system includes four items: left-line exhaust, left-line air supply, right-line exhaust, and right-line air supply. Each item includes a supply (exhaust) air outlet, a supply (exhaust) air connection duct, a supply (exhaust) air fan room, and a supply (exhaust) air duct. The fan room system also includes equipment rooms, equipment transportation channels, pedestrian crossways, etc. At present, fan rooms are set up in different locations to solve the exhaust or air supply of the corresponding tunnels respectively, and they are not shared with each other (that is, if the left-line air supply fan is damaged, the right-line air supply fan cannot be used, even if the fan may be idle). At present, underground fan rooms are large in scale, with a large number of lanes, complex spatial relationships, numerous intersections, and various constructions such as overpasses and underpasses have a great impact and are difficult to construct. According to a survey of currently operating tunnels, since most fan rooms are set up to consider future traffic volumes, the utilization rate of underground fan rooms is not high and the idle rate of fans is relatively high. Summary of the invention

[0005] The purpose of the present invention is to provide an underground fan room shared by a double-track tunnel. The double-track tunnels share exhaust ducts, exhaust fan rooms, supply ducts and supply fan rooms to achieve fan sharing and mutual backup, thereby improving fan utilization, reducing the scale of the underground fan room, reducing the number of lanes of the fan room system, and reducing spatial complexity. In addition, by setting up natural air ducts to ventilate the tunnel when the underground fan room is operating normally, the project cost is effectively reduced and the construction period is shortened.

[0006] The present invention is achieved through the following technical solutions:

[0007] The present invention provides an underground fan room system shared by a double-track tunnel, comprising a double-track tunnel, an underground fan room arranged outside the double-track tunnel, an air supply duct, an exhaust duct and a natural wind duct; the double-track tunnel comprises a left-track tunnel and a right-track tunnel; the wind ducts all vertically pass through the underground fan room, and the ends of the wind ducts away from the tunnels are connected to ventilation cross tunnels; an air supply room is arranged at the intersection of the air supply duct and the underground fan room; the end of the air supply duct close to the tunnel is connected to the right-track tunnel through the right-track air supply port; the middle part of the air supply duct is connected to the left-track tunnel through the left-track air supply port; an exhaust fan room is arranged at the intersection of the exhaust duct and the underground fan room; the end of the exhaust duct close to the tunnel is connected to the right-track tunnel through the right-track exhaust port; the middle part of the exhaust duct is connected to the left-track tunnel through the left-track exhaust port; the end of the natural wind duct close to the tunnel is connected to the left-track tunnel.

[0008] The design principle of the present invention is as follows: the current fan room system includes four items: left-line exhaust, left-line air supply, right-line exhaust and right-line air supply. Each item includes a supply (exhaust) air outlet, a supply (exhaust) air connecting air duct, a supply (exhaust) air fan room and a supply (exhaust) air duct. Fan rooms at different positions respectively solve the exhaust or air supply of the corresponding tunnels and are not shared with each other, which makes the current fan room have the disadvantages of large scale, large number of lanes, complex spatial relationship, numerous intersections and low fan utilization rate. The present invention realizes fan sharing by sharing exhaust ducts, exhaust fan rooms, supply ducts and supply fan rooms in double-line tunnels, which serve as backup for each other, improves fan utilization rate, reduces the scale of underground fan rooms, reduces the number of lanes of the fan room system, reduces spatial complexity, and sets natural air ducts to ventilate the tunnel when the underground fan room is in normal operation, effectively reducing engineering costs and shortening construction period.

[0009] Preferably, the air supply duct includes a double-line air supply duct, a double-line air supply connecting duct and a right-line air supply connecting duct; one end of the double-line air supply duct is connected to the ventilation cross tunnel, and the other end is connected to the underground fan room; one end of the double-line air supply connecting duct is connected to the underground fan room, and the other end is connected to the right-line air supply connecting duct; one end of the right-line air supply connecting duct is connected to the double-line air supply connecting duct, and the other end is connected to the right-line tunnel. In the current fan room system, the left-line tunnel and the right-line tunnel each correspond to an air supply machine room and an air supply duct, which are not shared with each other, and there are many lanes and a complex structure. The present invention combines the two air supply ducts into one, and sets two air supply outlets at the intersection of the air supply duct and the tunnel to supply air to the two tunnels respectively, thereby realizing the sharing of the air supply duct, reducing the number of lanes, and reducing the complexity of the project.

[0010] Preferably, a flow fan is arranged in the air supply room. According to the ventilation demand of the tunnel, 2 to 3 fans are arranged. In addition, when air is supplied to both the left-line tunnel and the right-line tunnel at the same time, a spare flow fan is arranged. The left-line tunnel and the right-line tunnel share the air supply room, which improves the utilization rate of the flow fan. In addition, a spare flow fan is arranged to ensure that the air supply room can still operate normally when a running flow fan fails, thereby improving the fault tolerance rate.

[0011] Preferably, a flow fan is installed in the exhaust fan room. According to the ventilation requirements of the tunnel, 2 to 3 fans are installed. In addition, a spare flow fan is installed to exhaust the left-line tunnel and the right-line tunnel at the same time. The left-line tunnel and the right-line tunnel share the exhaust fan room, which improves the utilization rate of the flow fan. A spare flow fan is installed to ensure that the exhaust fan room can still operate normally when the running flow fan fails, thereby improving the fault tolerance rate.

[0012] Preferably, a partition wall is provided in the double-line air supply connection duct, the partition wall is parallel to the central axis of the double-line air supply connection duct, and two air supply doors are provided at the starting point of the partition wall, and the area of ​​the air supply door is 5 to 15 square meters. Two tunnels share one air supply duct. In order to control the air supply volume of the two tunnels separately, a partition wall is provided in the double-line air supply connection duct to divide the tunnel into left and right parts, and two left and right air supply doors are provided at the starting point of the partition wall to control the air supply volume of the two tunnels respectively. The opening size of the air supply door can be controlled, and the design is ingenious, and the air supply volume of the system can be flexibly controlled according to the air quality in the tunnel.

[0013] Preferably, the exhaust duct is in a double-line shared form, the right-line exhaust duct crosses over the left-line tunnel, the exhaust duct is raised at the crossing position, and a middle partition is provided, an isolation door is provided at one end of the middle partition away from the fan room, and two exhaust doors are provided at the other end. The function of sharing one exhaust duct to exhaust air for two tunnels is achieved through the middle partition, the isolation door and the two exhaust doors. By closing the isolation door and then controlling the opening and closing of the two exhaust doors respectively, the effect of controlling the air supply volume for the two tunnels can be achieved. The design is ingenious, and the system exhaust volume can be flexibly controlled according to the air quality in the tunnel.

[0014] Preferably, the natural wind channel and the transport channel are connected through a channel in the underground fan room, so that energy can be saved for the operation of the system through the natural wind channel when the system is operating normally.

[0015] Preferably, pedestrian passages are provided at both ends of the underground fan room to facilitate staff to enter the fan room to carry out related work and to enable timely evacuation in case of emergency.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0017] 1. The present invention provides an underground fan room system shared by double-track tunnels, and the double tunnels share a common air supply system and exhaust system, which improves the utilization rate of the fan, reduces the number of tunnels in the project, reduces the scale of the project, can effectively save construction costs, and shorten the construction period;

[0018] 2. The present invention provides an underground fan room system shared by a double-track tunnel, in which the natural wind duct and the transportation channel are connected, and energy can be saved for the operation of the system through the natural wind duct when the system is operating normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0020] Figure 1 It is a schematic diagram of the plan layout of the underground fan room system of the present invention.

[0021] Figure 2 It is a schematic diagram of the longitudinal section of the exhaust duct of the underground fan room system of the present invention.

[0022] Names in the attached drawings:

[0023] 1-underground fan room, 2-ventilation tunnel, 3-double-line supply air duct, 4-double-line exhaust duct, 5-natural air duct, 6-supply fan room, 7-exhaust fan room, 8-equipment room, 9-double-line supply air connecting air duct, 10-double-line exhaust air connecting air duct, 11-first air supply door, 12-second air supply door, 13-isolation wall, 14-left-line supply air outlet, 15-right-line supply air outlet, 16-left-line exhaust outlet, 17-transportation passage, 18-left-line tunnel, 19-right-line tunnel, 20-pedestrian passage, 21-pedestrian passage, 22-right-line supply air connecting air duct, 23-right-line exhaust connecting air duct, 24-right-line exhaust outlet, 25-isolation door, 26-middle partition, 27-exhaust door, 28-exhaust door. DETAILED DESCRIPTION

[0024] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0025] Example

[0026] like Figure 1As shown, the present invention provides an underground fan room system shared by a double-track tunnel, comprising a double-track tunnel, an underground fan room 1 arranged outside the double-track tunnel, an air supply duct, an exhaust duct and a natural air duct; the double-track tunnel comprises a left-track tunnel 18 and a right-track tunnel 19, the air ducts all vertically pass through the underground fan room, and the ends of the air ducts away from the tunnels are connected to the ventilation cross tunnel 2; an air supply room 6 is arranged at the intersection of the air supply duct and the underground fan room 1; the end of the air supply duct close to the tunnel is connected to the right-track tunnel 19 through the right-track air supply port 15; the middle part of the air supply duct is connected to the left-track tunnel 18 through the left-track air supply port 14; an exhaust fan room 7 is arranged at the intersection of the exhaust duct and the underground fan room 1; the end of the exhaust duct close to the tunnel is connected to the right-track tunnel 19 through the right-track exhaust port 24; the middle part of the exhaust duct is connected to the left-track tunnel 18 through the left-track exhaust port 16; the end of the natural air duct close to the tunnel is connected to the left-track tunnel.

[0027] The design principle of the present invention is as follows: the current fan room system includes four items: left-line exhaust, left-line air supply, right-line exhaust and right-line air supply. Each item includes a supply (exhaust) air outlet, a supply (exhaust) air connecting air duct, a supply (exhaust) air fan room and a supply (exhaust) air duct. Fan rooms at different positions respectively solve the exhaust or air supply of the corresponding tunnels and are not shared with each other, which makes the current fan room have the disadvantages of large scale, large number of lanes, complex spatial relationship, numerous intersections and low fan utilization rate. The present invention realizes fan sharing through the double-line tunnel by sharing the exhaust duct and the exhaust fan room, and the air supply duct and the air supply fan room, which serve as backup for each other, thereby improving the fan utilization rate, reducing the scale of the underground fan room, reducing the number of lanes of the fan room system, reducing the spatial complexity, and arranging a natural air duct to ventilate the tunnel when the underground fan room is in normal operation, effectively reducing the project cost and shortening the construction period.

[0028] Preferably, the air supply duct includes a double-line air supply duct 3, a double-line air supply connecting duct 9 and a right-line air supply connecting duct 22; one end of the double-line air supply duct 3 is connected to the ventilation cross tunnel 2, and the other end is connected to the underground fan room 1; one end of the double-line air supply connecting duct 9 is connected to the underground fan room 1, and the other end is connected to the right-line air supply connecting duct 22; one end of the right-line air supply connecting duct 22 is connected to the double-line air supply connecting duct 9, and the other end is connected to the right-line tunnel 19. In the current fan room system, the left-line tunnel and the right-line tunnel each correspond to an air supply machine room and an air supply duct, which are not shared with each other, and there are many lanes and a complex structure. The present invention combines the two air supply ducts into one, and sets two air supply ports at the intersection of the air supply duct and the tunnel, respectively supplying air to the two tunnels, thereby realizing the sharing of the air supply duct, reducing the number of lanes, and reducing the complexity of the project.

[0029] Preferably, a flow fan is provided in the air supply room 6. According to the ventilation demand of the tunnel, 2 to 3 fans are provided. In addition, a backup fan is provided to supply air to both the left-line tunnel and the right-line tunnel. The left-line tunnel 18 and the right-line tunnel 19 share the air supply room 6, thereby improving the utilization rate of the flow fan. In addition, a backup flow fan is provided to ensure that the air supply room 6 can still operate normally when a running flow fan fails, thereby improving the fault tolerance rate.

[0030] Preferably, a flow fan is provided in the exhaust fan room 7. According to the ventilation requirements of the tunnel, 2 to 3 fans are provided. In addition, a backup fan is provided to exhaust the left-line tunnel and the right-line tunnel at the same time. The left-line tunnel 18 and the right-line tunnel 19 share the exhaust fan room 7, thereby improving the utilization rate of the flow fan. In addition, a backup flow fan is provided to ensure that the supply fan room 7 can still operate normally when a running flow fan fails, thereby improving the fault tolerance rate.

[0031] Preferably, an isolation wall 13 is provided in the double-line air supply connecting air duct 9, the isolation wall 13 is parallel to the central axis of the double-line air supply connecting air duct, and a first air supply door 11 and a second air supply door 12 are provided at the starting point of the isolation wall. The area of ​​the first air supply door 11 and the second air supply door 12 is 5 to 15 square meters. By controlling the opening size of the first air supply door 11 and the second air supply door 12, the air supply volume of the left-line tunnel and the right-line tunnel can be controlled respectively.

[0032] Preferably, Figure 2 The exhaust duct shown is of a double-line shared type. The right-line exhaust duct 26 crosses over the left-line tunnel 18. The exhaust duct is raised at the crossing position and a middle partition 26 is provided. An isolation door 25 is provided at one end of the middle partition 26 away from the fan room, and exhaust doors 27 and exhaust doors 28 are provided at the other end. By closing the isolation door 25, the exhaust volume of the left-line tunnel 18 and the right-line tunnel 19 can be controlled respectively by controlling the opening size of the exhaust doors 27 and the exhaust doors 28. In special circumstances, such as an accident in the right-line tunnel, the isolation door 25 and the exhaust door 28 can also be opened at the same time, and the channel can be used for rescue on the scene.

[0033] Preferably, the natural wind channel 5 and the transport channel 17 are connected through a channel in the underground fan room 1, so that energy can be saved for the operation of the system through the natural wind channel when the system is operating normally.

[0034] Preferably, pedestrian passages 20 and 21 are respectively provided at both ends of the underground fan room 1, and the pedestrian passages 20 and 21 are connected to the left-line tunnel, so that the staff can enter the fan room to carry out related work conveniently and evacuate in time when an emergency occurs.

[0035] This implementation method reduces the scale of project development and saves project costs by sharing air supply ducts, exhaust ducts, air supply machine rooms and exhaust machine rooms. At the same time, it greatly reduces the difficulty of the project by reducing the number of machine rooms and lanes. In addition, natural air ducts are set up to flexibly utilize natural resources and save project costs.

[0036] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An underground fan room system shared by a double-track tunnel, comprising a double-track tunnel and an underground fan room (1) arranged outside the double-track tunnel, wherein the double-track tunnel comprises a left-track tunnel (18) and a right-track tunnel (19), characterized in that: It also includes an air duct, which passes through the underground fan room longitudinally, and the ends of the air duct away from the tunnel are connected to the ventilation tunnel (2); the air duct includes an air supply duct, an exhaust duct and a natural air duct; An air supply room (6) is provided at the intersection of the air supply duct and the underground fan room (1); the end of the air supply duct close to the tunnel is connected to the right-line tunnel (19) through the right-line air supply port (15); the middle part of the air supply duct is connected to the left-line tunnel (18) through the left-line air supply port (14); An exhaust fan room (7) is provided at the intersection of the exhaust duct and the underground fan room (1); the end of the exhaust duct close to the tunnel is connected to the right-line tunnel (19) through the right-line exhaust port (24); the middle of the exhaust duct is connected to the left-line tunnel (18) through the left-line exhaust port (16); One end of the natural wind channel close to the tunnel is connected to the left-line tunnel (18); The air supply duct comprises a double-line air supply duct (3), a double-line air supply connecting duct (9) and a right-line air supply connecting duct (22); one end of the double-line air supply duct (3) is connected to the ventilation cross tunnel (2), and the other end is connected to the underground fan room (1); one end of the double-line air supply connecting duct (9) is connected to the underground fan room (1), and the other end is connected to the right-line air supply connecting duct (22); one end of the right-line air supply connecting duct (22) is connected to the double-line air supply connecting duct (9), and the other end is connected to the right-line tunnel (19).

2. The underground fan room system shared by double-track tunnels according to claim 1 is characterized in that: A partition wall (13) is provided in the middle of the double-line air supply connecting air duct (9), and the partition wall (13) is parallel to the central axis of the double-line air supply connecting air duct (9); a first air supply door (11) and a second air supply door (12) are provided at one end of the partition wall (13) close to the underground fan room.

3. The underground fan room system shared by double-track tunnels according to claim 2 is characterized in that: The first air supply door (11) and the second air supply door (12) have an area of ​​5 to 15 square meters, and the opening size is adjustable.

4. The underground fan room system shared by double-track tunnels according to claim 1 is characterized in that: The exhaust duct comprises a double-line exhaust duct (4), a double-line exhaust connecting duct (10) and a right-line exhaust connecting duct (23); one end of the double-line exhaust duct (4) is connected to the ventilation cross tunnel (2), and the other end is connected to the underground fan room (1); one end of the double-line exhaust connecting duct (10) is connected to the underground fan room (1), and the other end is connected to the right-line exhaust connecting duct (23); one end of the right-line exhaust connecting duct (23) is connected to the double-line exhaust connecting duct (10), and the other end is connected to the right-line tunnel (19).

5. The underground fan room system shared by double-track tunnels according to claim 4 is characterized in that: A middle partition (26) is provided at the connection between the right-line exhaust connection air duct (23) and the double-line exhaust connection air duct (10), and the middle partition (26) is parallel to the central axis of the right-line exhaust connection air duct (23); an isolation door (25) is provided at one end of the middle partition (26) close to the tunnel, and an exhaust door (27) and an exhaust door (28) are provided at one end of the middle partition (26) close to the underground fan room (1).

6. The underground fan room system shared by double-track tunnels according to claim 5 is characterized in that: The opening sizes of the exhaust door (27) and the exhaust door (28) are adjustable.

7. The underground fan room system shared by double-track tunnels according to claim 1 is characterized in that: The natural wind channel comprises a natural wind channel (5) connecting the ventilation cross tunnel (2) and the underground fan room (1), and a transportation channel connecting the underground fan room (1) and the left-line tunnel (18).

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