CN110529167B - Pressure relief and ventilation device and method for highway-railway tunnel group - Google Patents
Pressure relief and ventilation device and method for highway-railway tunnel group Download PDFInfo
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- CN110529167B CN110529167B CN201910745617.9A CN201910745617A CN110529167B CN 110529167 B CN110529167 B CN 110529167B CN 201910745617 A CN201910745617 A CN 201910745617A CN 110529167 B CN110529167 B CN 110529167B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/003—Ventilation of traffic tunnels
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
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Abstract
The invention relates to the technical field of tunnel construction, in particular to a pressure relief and ventilation device and method for a highway-railway tunnel group. The tunnel ventilation and pressure relief device comprises a railway tunnel and a highway tunnel, wherein a ventilation and pressure relief pipe is arranged between the railway tunnel and the highway tunnel, one end of the ventilation and pressure relief pipe is communicated with the railway tunnel, and the other end of the ventilation and pressure relief pipe is communicated with the highway tunnel; a one-way valve is arranged in the ventilation pressure relief pipe. The highway tunnel can provide the pressure release space for the railway tunnel, reduces the windage that the train operation piston wind of railway tunnel caused, and the extruded air in train the place ahead passes through the ventilation pressure release pipe and discharges into the highway tunnel when the train operation. The invention supplies air for the highway tunnel through the piston wind effect of the high-speed railway tunnel train, provides pressure relief space for the high-speed railway tunnel by utilizing the large-section highway tunnel, forms a mutual ventilation and pressure relief system, can further reduce the section of the railway tunnel, reduces the engineering investment, reduces the ventilation cost and the operation cost of the highway tunnel, and has important significance for the construction of the cross-sea tunnel.
Description
Technical Field
The invention relates to the technical field of tunnel construction, in particular to a pressure relief and ventilation device and method for a highway-railway tunnel group.
Background
In recent years, the traffic industry of railways and highways in China is rapidly developed, more and more long and large tunnels are provided, and in the construction of the long and large tunnels, the advantages and disadvantages of a ventilation scheme and the quality of an operation effect directly relate to the disaster relief engineering, the operation environment, the disaster relief function, the operation benefit and the like of the tunnels.
The foreign research on the tunnel ventilation problem is started earlier, the problem appears in railway tunnels at the earliest time, and the technical problem of the tunnel ventilation of the highway is researched along with the appearance of the tunnel of the highway. In 1919, when a dutch tunnel in new york city is built in the united states, the U.S. mining administration is mainly used, and with the assistance of some universities and research institutes, the allowable values of the emission amount of the CO of the automobile and the concentration of the CO by the human body are researched and used as the basis for calculating the ventilation of the tunnel, which is the historical first research on the ventilation of the highway tunnel, and the research result determines that 400ppm is used as the design concentration of the CO, and the required ventilation is calculated according to the design concentration. The international seminar of aerodynamics and tunnel ventilation established in 1973 is held once every 3 years, and tunnel ventilation experts in various countries show own research results, thereby greatly promoting the development of tunnel ventilation technology. In 1985, longitudinal ventilation is applied to road tunnels with the length of more than 10km for the first time in Japan, and the ventilation system of the tunnel is simulated through a set of compiled programs, so that the reliability and the practicability of the ventilation system are verified. In addition, a number of studies have been conducted by foreign researchers such as Bring A, Chen T Y, Jang H M, Guian S K, Miroslav Sambolek and Jaroslav Katolick et al in the field of highway tunnel ventilation.
The construction of the road tunnel in China starts late, and the research on the ventilation of the road tunnel lags behind Europe, America and Japan. The 1994 Lanzhou railway academy completes the simulation test research of the long tunnel longitudinal ventilation model of the highway depending on the tunnel of the Chinese traditional beam mountain and the tunnel of the Jinyun mountain; corresponding researches have been made in the aspect of tunnel ventilation by Chongqing road scientific research institute in 1999, and on the basis of the existing experiences in China, the ventilation and lighting design specification JTJ 026.1-1999 of the road tunnel is written under the supervision of the successful experiences and the advanced technologies of foreign road tunnels, so that the tunnel ventilation design has an updated reference basis.
The length of the tunnel of the sea channel in the Johnson state in China is expected to reach 23km, the length of the tunnel of the Bohai sea channel exceeds 48km, and the ventilation problem influences the key technology of the construction of the ultra-long tunnels. In addition, high-speed railway tunnel, single hole single track tunnel especially, the section is less, and the air resistance that the train piston effect arouses is great, needs to set up pressure relief system and reduces air resistance.
Disclosure of Invention
The invention provides a pressure relief and ventilation device and method for a highway-railway tunnel group, aiming at the problems that in the prior art, a super-long railway tunnel needs pressure relief due to a train piston effect, and the super-long highway tunnel cannot be ventilated effectively at low cost.
In order to solve the technical problems, the invention adopts the technical scheme that:
a pressure relief and ventilation device for a highway-railway tunnel group comprises a railway tunnel and a highway tunnel which are arranged in parallel, wherein a plurality of ventilation and pressure relief pipes are arranged between the railway tunnel and the highway tunnel, one end of each ventilation and pressure relief pipe is communicated with the railway tunnel, and the other end of each ventilation and pressure relief pipe is communicated with the highway tunnel; and a one-way valve for preventing air in the road tunnel from flowing to the railway tunnel is arranged in the ventilation pressure relief pipe. The highway tunnel can provide the pressure release space for the railway tunnel, reduces the windage that the train operation piston wind of railway tunnel caused, and the extruded air in train the place ahead passes through the ventilation pressure release pipe and discharges into the highway tunnel when the train operation.
Furthermore, a fire automatic closing valve which is automatically closed when a fire breaks out is arranged in the ventilation pressure relief pipe.
Furthermore, the included angle of the extension line of the advancing direction of the train in the ventilation pressure relief pipe and the railway tunnel is 45 degrees, so that the ventilation effect and the pressure relief effect of the ventilation pressure relief pipe can be improved, and the wind resistance is reduced.
Furthermore, the plurality of ventilation pressure relief pipes are uniformly arranged, and the distance between two adjacent ventilation pressure relief pipes is 200-400 m.
Furthermore, a normally closed communication transverse channel is arranged between the railway tunnel and the highway tunnel.
Further, the railway tunnel comprises a first railway tunnel and a second railway tunnel, the highway tunnel comprises a first highway tunnel and a second highway tunnel, the ventilation pressure relief pipe comprises a first ventilation pressure relief pipe and a second ventilation pressure relief pipe, the first ventilation pressure relief pipe is arranged between the first railway tunnel and the first highway tunnel, and the second ventilation pressure relief pipe (31) is arranged between the second railway tunnel and the second highway tunnel; the first road tunnel and the second road tunnel are arranged between the first railway tunnel and the second railway tunnel, and a third communication transverse channel is arranged between the first road tunnel and the second road tunnel.
Furthermore, a first check valve and a first automatic fire hazard closing valve are arranged in the first ventilation and pressure relief pipe; and a second one-way valve and a second automatic fire hazard closing valve (52) are arranged in the second ventilating pressure relief pipe.
The invention also discloses a pressure relief and ventilation method for the highway-railway tunnel group, which comprises the following steps:
arranging a railway tunnel and a highway tunnel in parallel;
arranging a plurality of ventilation pressure relief pipes between the railway tunnel and the highway tunnel, and communicating the railway tunnel with the highway tunnel;
the ventilation pressure relief pipe is internally provided with a one-way valve, so that air in the railway tunnel can flow to the highway tunnel, and the air in the highway tunnel is prevented from flowing to the railway tunnel.
Furthermore, the included angle between the ventilation pressure relief pipe and the extension line of the advancing direction of the train in the railway tunnel is 45 degrees.
Furthermore, the plurality of ventilation pressure relief pipes are arranged in parallel, and the distance between two adjacent ventilation pressure relief pipes is 200-400 m.
Compared with the prior art, the road-rail tunnel group pressure relief and ventilation device and the method have the beneficial effects that:
the invention supplies air for the highway tunnel through the piston wind effect of the high-speed railway tunnel train, provides pressure relief space for the high-speed railway tunnel by utilizing the large-section highway tunnel, forms a mutual ventilation and pressure relief system, can further reduce the section of the railway tunnel, reduces the engineering investment, reduces the ventilation cost and the operation cost of the highway tunnel, and has important significance for the construction of the cross-sea tunnel.
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FIG. 1 is a schematic structural view of example 1 of the present invention;
FIG. 2 is a schematic structural diagram of embodiment 2 of the present invention;
fig. 3 is a schematic top view of the structure of embodiment 2 of the present invention.
The labels in the figure are: 1. a railway tunnel; 2. a road tunnel; 3. a ventilation pressure relief pipe; 4. automatic fire shut-off valve; 5. a one-way valve; 6. a communication cross channel; 7. an exhaust fan; 11. a first railway tunnel; 12. a second railway tunnel; 21. a first highway tunnel; 22. a second highway tunnel; 31. a first ventilation pressure relief pipe; 32. a second ventilating pressure relief pipe; 41. a first fire automatic shutoff valve; 42. a second fire automatic shutoff valve; 51. a first check valve; 52. a second one-way valve; 61. a first cross-connect channel; 62. a second cross-channel junction; 71. a first exhaust fan; 72. a second exhaust fan; 8. a third cross-channel; 9. a train; 10. an automobile.
Detailed Description
The invention will be further illustrated with reference to specific examples. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. Specific structural and functional details disclosed herein are merely illustrative of example embodiments of the invention. This invention may, however, be embodied in many alternate forms and should not be construed as limited to the embodiments set forth herein.
It should be understood that the terms first, second, etc. are used merely for distinguishing between descriptions and are not intended to indicate or imply relative importance. Although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of example embodiments of the present invention.
It should be understood that the term "and/or" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, B exists alone, and A and B exist at the same time, and the term "/and" is used herein to describe another association object relationship, which means that two relationships may exist, for example, A/and B, may mean: a alone, and both a and B alone, and further, the character "/" in this document generally means that the former and latter associated objects are in an "or" relationship.
It is to be understood that in the description of the present invention, the terms "upper", "vertical", "inside", "outside", and the like, refer to an orientation or positional relationship that is conventionally used for placing the product of the present invention, or that is conventionally understood by those skilled in the art, and are used merely for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be considered as limiting the present invention.
It will be understood that when an element is referred to as being "connected," "connected," or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may be present. In contrast, when an element is referred to as being "directly adjacent" or "directly coupled" to another element, there are no intervening elements present. Other words used to describe the relationship between elements should be interpreted in a similar manner (e.g., "between … …" versus "directly between … …", "adjacent" versus "directly adjacent", etc.).
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes," and/or "including," when used herein, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, elements, components, and/or groups thereof.
It should also be noted that, in some alternative implementations, the functions/acts noted may occur out of the order. For example, depending on the functionality/acts involved, they may in fact be performed substantially concurrently, or may sometimes be performed in the reverse order.
In the following description, specific details are provided to facilitate a thorough understanding of example embodiments. However, it will be understood by those of ordinary skill in the art that the example embodiments may be practiced without these specific details. In other instances, well-known processes, structures and techniques may be shown without unnecessary detail in order to avoid obscuring example embodiments.
Example 1
As shown in fig. 1, the invention discloses a pressure relief and ventilation device for a highway-railway tunnel group, which comprises a railway tunnel 1 and a highway tunnel 2 which are arranged in parallel, wherein a plurality of pressure relief and ventilation pipes 3 are arranged between the railway tunnel 1 and the highway tunnel 2, one end of each pressure relief and ventilation pipe 3 is communicated with the railway tunnel 1, and the other end of each pressure relief and ventilation pipe 3 is communicated with the highway tunnel 2; and a one-way valve 5 for preventing the air in the highway tunnel 2 from flowing to the railway tunnel 1 is arranged in the pressure relief vent pipe 3. And a fire automatic closing valve 4 which is automatically closed when a fire breaks out is also arranged in the pressure relief vent pipe 3. The included angle between the pressure-relief vent pipe 3 and the extension line of the advancing direction of the train 9 in the railway tunnel 1 is 45 degrees. The plurality of pressure relief ventilation pipes 3 are uniformly arranged, and the distance between two adjacent pressure relief ventilation pipes 3 is 200-400 m. A normally closed communication transverse passage 6 is also arranged between the railway tunnel 1 and the highway tunnel 2. And an exhaust fan 7 is also arranged at the top of the road tunnel 2.
Example 2
As shown in fig. 2 and 3, the invention discloses a pressure relief and ventilation device for a highway-railway tunnel group, which is particularly applied to an ultra-long sea-crossing highway-railway tunnel group. This embodiment includes four parallel tunnels, and wherein two tunnels of both sides are railway tunnel 1, and two tunnels in the middle are highway tunnel 2. A first railway tunnel 11, a first road tunnel 21, a second road tunnel 22 and a second railway tunnel 12 are arranged from left to right in sequence; the highway tunnel 2 can be set as a three-lane highway tunnel, the clearance is 13.8m, the railway tunnel 1 is a single-track railway tunnel, the inner diameter is 8.9m, the large-section highway tunnel 2 can provide a pressure relief space for the railway tunnel 1, in order to reduce the wind resistance caused by the wind of a train 9 running piston in the railway tunnel 1, a transverse ventilation pressure relief pipe 3 is arranged between the highway tunnel 2 and the railway tunnel 1 at intervals of 200 and 400m, and the extruded air in front of the train 9 during the running of the train 9 is discharged into the highway tunnel 2 through the ventilation pressure relief pipe 3.
A first ventilation and pressure relief pipe 31 is provided between the first road tunnel 21 and the first railway tunnel 11 to communicate the first road tunnel 21 with the first railway tunnel 11, and a second ventilation and pressure relief pipe 32 is provided between the second road tunnel 22 and the second railway tunnel 12 to communicate the second road tunnel 22 with the second railway tunnel 12. The highway tunnel 2 has a large ventilation demand due to automobile exhaust, tire friction and the like, and the longer the tunnel is, the larger the ventilation cost is. And the railway tunnel 1 can provide supplementary ventilation for the highway tunnel 2 due to the piston wind effect of the train 9, particularly the high-speed railway train, electric traction, wheel-rail contact and relatively fresh air in the tunnel.
The anti-pollution air in the road tunnel 2 is prevented from reversely flowing into the railway tunnel 1, and the one-way valve 5 is arranged in the middle of the ventilation and pressure relief pipe 3, so that the air in the railway tunnel 1 can be allowed to flow to the road tunnel 2, but the air in the road tunnel 2 cannot reversely flow into the railway tunnel 1. A first check valve 51 is arranged in the first ventilation pressure relief pipe 31, and a second check valve 52 is arranged in the second ventilation pressure relief pipe 32.
In order to improve the ventilation effect and the pressure relief effect of the ventilation pressure relief pipe 3 and reduce the wind resistance, the ventilation pressure relief pipe 3 and the axis of the railway tunnel 1 are in 45-degree oblique crossing. The running directions of the automobile 10 in the highway tunnel 2 and the train 9 in the railway tunnel 1 which are connected by the ventilation and pressure relief pipe 3 are kept consistent.
The ventilation pressure relief pipe 3 is provided with a fire automatic closing valve 4, and when a fire working condition occurs, the ventilation pressure relief pipe 3 is automatically closed, so that smoke emitted by the fire is prevented from influencing each other between the highway tunnel 2 and the railway tunnel 1. A first automatic fire shut-off valve 41 is provided in the first ventilation and pressure relief pipe 31, and a second automatic fire shut-off valve 42 is provided in the second ventilation and pressure relief pipe 32.
A third connecting cross passage 8 is arranged between the first road tunnel 21 and the second road tunnel 22, a first connecting cross passage 61 is arranged between the first road tunnel 21 and the first railway tunnel 11, and a second connecting cross passage 62 is arranged between the second road tunnel 22 and the second railway tunnel 12. The first communication cross passage 61, the second communication cross passage 62 and the third communication cross passage 8 are all in a normally closed state. The first exhaust fan 71 is further provided on the top of the first road tunnel 21, and the second exhaust fan is further provided on the top of the second road tunnel 22.
Example 3
The embodiment 3 discloses a pressure relief and ventilation method for a highway-railway tunnel group, which comprises the following steps:
arranging a railway tunnel 1 and a highway tunnel 2 in parallel;
arranging a plurality of pressure relief ventilation pipes 3 between the railway tunnel 1 and the highway tunnel 2, and communicating the railway tunnel 1 with the highway tunnel 2;
a check valve 5 is arranged in the pressure relief vent pipe 3, so that air in the railway tunnel 1 can flow to the highway tunnel 2, and the air in the highway tunnel 2 is prevented from flowing to the railway tunnel 1.
The included angle between the pressure-relief vent pipe 3 and the extension line of the advancing direction of the train 9 in the railway tunnel 1 is 45 degrees.
The plurality of pressure relief ventilation pipes 3 are arranged in parallel, and the distance between two adjacent pressure relief ventilation pipes 3 is 200-400 m.
The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the scope of the present invention is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present invention, and such modifications and equivalents should also be considered as falling within the scope of the present invention.
Claims (10)
1. The utility model provides a public railway tunnel crowd pressure release ventilation unit which characterized in that: the tunnel ventilation and pressure relief device comprises a railway tunnel (1) and a highway tunnel (2) which are arranged in parallel, wherein a plurality of ventilation and pressure relief pipes (3) are arranged between the railway tunnel (1) and the highway tunnel (2), one end of each ventilation and pressure relief pipe (3) is communicated with the railway tunnel (1), and the other end of each ventilation and pressure relief pipe is communicated with the highway tunnel (2); a one-way valve (5) for preventing air in the highway tunnel (2) from flowing to the railway tunnel (1) is arranged in the ventilation pressure relief pipe (3);
the running directions of the automobiles (10) in the highway tunnel (2) and the trains (9) in the railway tunnel (1) which are connected by the ventilation and pressure relief pipe (3) are kept consistent.
2. The road-rail tunnel group pressure relief ventilation device of claim 1, wherein: and a fire automatic closing valve (4) which is automatically closed when a fire occurs is also arranged in the ventilation pressure relief pipe (3).
3. The road-rail tunnel group pressure relief ventilation device of claim 1, wherein: the included angle between the ventilation pressure relief pipe (3) and the extension line of the advancing direction of the train (9) in the railway tunnel (1) is 45 degrees.
4. The road-rail tunnel group pressure relief ventilation device of claim 1, wherein: the plurality of ventilation and pressure relief pipes (3) are uniformly arranged, and the distance between two adjacent ventilation and pressure relief pipes (3) is 200-400 m.
5. The road-rail tunnel group pressure relief ventilation device of claim 1, wherein: a normally closed communication transverse passage (6) is also arranged between the railway tunnel (1) and the highway tunnel (2).
6. The road-rail tunnel group pressure relief ventilation device of claim 1, wherein: the railway tunnel (1) comprises a first railway tunnel (11) and a second railway tunnel (12), the highway tunnel comprises a first highway tunnel (21) and a second highway tunnel (22), the ventilation pressure relief pipe (3) comprises a first ventilation pressure relief pipe (31) and a second ventilation pressure relief pipe (32), the first ventilation pressure relief pipe (31) is arranged between the first railway tunnel (11) and the first highway tunnel (21), and the second ventilation pressure relief pipe (31) is arranged between the second railway tunnel (12) and the second highway tunnel (22); the first road tunnel (21) and the second road tunnel (22) are arranged between the first railway tunnel (11) and the second railway tunnel (12), and a third communication transverse channel (8) is arranged between the first road tunnel (21) and the second road tunnel (22).
7. The road-rail tunnel group pressure relief ventilation device of claim 6, wherein: a first check valve (51) and a first automatic fire hazard closing valve (41) are arranged in the first ventilation pressure relief pipe (31); and a second one-way valve (52) and a second automatic fire hazard closing valve (52) are arranged in the second ventilating pressure-relief pipe (32).
8. A pressure relief and ventilation method for a highway-railway tunnel group is characterized by comprising the following steps:
arranging a railway tunnel (1) and a highway tunnel (2) in parallel;
arranging a plurality of ventilation pressure relief pipes (3) between the railway tunnel (1) and the highway tunnel (2), and communicating the railway tunnel (1) and the highway tunnel (2);
a one-way valve (5) is arranged in the ventilation and pressure relief pipe (3), so that the air in the railway tunnel (1) can flow to the highway tunnel (2), and the air in the highway tunnel (2) is prevented from flowing to the railway tunnel (1);
the running directions of the automobiles (10) in the highway tunnel (2) and the trains (9) in the railway tunnel (1) which are connected by the ventilation and pressure relief pipe (3) are kept consistent.
9. The highway-railway tunnel group pressure relief and ventilation method according to claim 8, wherein: the included angle between the ventilation pressure relief pipe (3) and the extension line of the advancing direction of the train (9) in the railway tunnel (1) is 45 degrees.
10. The highway-railway tunnel group pressure relief and ventilation method according to claim 8, wherein: the plurality of ventilation and pressure relief pipes (3) are arranged in parallel, and the distance between two adjacent ventilation and pressure relief pipes (3) is 200-400 m.
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| CN201910745617.9A CN110529167B (en) | 2019-08-13 | 2019-08-13 | Pressure relief and ventilation device and method for highway-railway tunnel group |
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| CN111894646B (en) * | 2020-06-29 | 2022-08-02 | 中铁第一勘察设计院集团有限公司 | Ventilating system and ventilating method for natural ventilation of ultra-long electrified railway |
| CN111828441B (en) * | 2020-07-28 | 2021-11-19 | 温州泰乐维工程设计有限公司 | Air oscillation controller for railway tunnel |
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| CN101655012A (en) * | 2009-07-03 | 2010-02-24 | 中交第二公路勘察设计研究院有限公司 | Method for ventilating double-hole tunnel network |
| CN205955764U (en) * | 2016-07-07 | 2017-02-15 | 长安大学 | Two complementary vertical strokes in hole in highway tunnel / inclined shaft ventilation system |
| CN207144991U (en) * | 2017-08-21 | 2018-03-27 | 中铁第四勘察设计院集团有限公司 | A kind of service channel pressure relief |
| CN208456612U (en) * | 2018-06-27 | 2019-02-01 | 曹传喜 | Sealed circulated air traffic tunnel |
| KR102006770B1 (en) * | 2018-12-27 | 2019-10-01 | 주식회사 태영티에스 | Road tunnel fire suppression and rescue system |
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