Highway tunnel exhaust port opening method

A technology for road tunnels and smoke exhaust outlets, which is applied in mine/tunnel ventilation, earthwork drilling, mining equipment, etc. It can solve the problem that there is no effective technical solution for the start-up method of smoke exhaust outlets, and achieve good smoke layer maintenance, Good safety space and optimized smoke exhaust effect

CN101509392AInactive Publication Date: 2009-08-19SHANGHAI TUNNEL ENGINEERING RAILWAY TRANSPORTATION DESIGN INSTITUTE
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2009-08-19
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to ventilation and fire control of road tunnels, in particular to a method for initiating a smoke outlet of the road tunnel. The method comprises a smoke vent arranged along the length direction of tunnel and a plurality of smoke outlets arranged at the top of the tunnel, wherein, the smoke vent is internally provided with a smoke exhaust blower, the smoke outlets are communicated by the smoke vent; the method is characterized in that the initiating method is : when a fire source appears, after the fire source position is fixed, two smoke outlets at the lower reaches of a fire source point and a smoke outlet at the upper reaches of the fire source point are initiated; the method has the advantages of optimizing smoke exhaust effect of the road tunnel, improving smoke control capacity, reducing influence range thereof on the basis of the same smoke exhaust configuration, effectively controlling proliferation of smoke within the range of 150m, maintaining fine smoke layering and providing relatively good safe space for the specialized personnel.
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Description

technical field

[0001] The invention relates to ventilation and fire protection of road tunnels, in particular to a method for starting a smoke outlet of a road tunnel. Background technique

[0002] The road tunnel is a semi-enclosed space, and the burning materials are mostly gasoline and diesel oil. Once a fire breaks out, the high temperature and toxic smoke generated are extremely difficult to get rid of in time, which will cause great harm to the facilities and personnel in the underground space, and easily cause vicious accident. Therefore, ventilation and smoke exhaust are the most important measures for tunnel fire protection. In road tunnels, suitable smoke control systems must be in place. It is an effective tunnel smoke control technology to set up smoke exhaust ducts at the top or other parts along the length of the tunnel, and to open a series of smoke exhaust outlets at the top of the tunnel. However, when the location of the fire source is determined, which...

Examples

Embodiment 1

[0018] Embodiment 1: This embodiment is a scheme for starting the smoke outlet of a one-way road tunnel. In the single-lane tunnel 1, the tunnel air is affected by the piston action of the vehicle and flows from the entrance of the tunnel 1 to the exit. Therefore, in this embodiment 1, considering the flow direction of the tunnel air, the entrance of the single-lane tunnel 1 is called the upstream direction 4 , and the exit is called the downstream direction 5 .

[0019] The specific values ​​of the parameters of each device are as follows: the cross-section of the smoke exhaust port is a square of 2m×2m; the distance between adjacent smoke exhaust ports is 60m; the air volume of the smoke exhaust fan 3 is 100m 3 / s.

[0020] like figure 1 As shown, a flue exhaust duct 2 is arranged on the top of the single-row tunnel 1 along the length direction of the single-row tunnel 1 . The smoke exhaust duct 2 is connected with a smoke exhaust fan 3 . There are evenly and continuousl...

Embodiment 2

[0027] Embodiment 2: This embodiment is the start-up scheme of the smoke outlet of the single-hole double-lane tunnel 7. In the double-lane tunnel 7, the tunnel air is simultaneously affected by the uplink vehicle and the downlink vehicle, and the influence of the air flow on the smoke exhaust can be ignored, but To simplify the description, in this embodiment, one opening of the single-hole double-row tunnel 7 is still referred to as the upstream direction, and the other opening is referred to as the downstream direction. Although the tunnels are different, the principle of smoke extraction is the same, and the parameters of the equipment can also adopt the same configuration. Therefore, in this embodiment, the configuration of other devices is the same as that of Embodiment 1 except that the smoke exhaust port activation mode is different.

[0028] The present embodiment 2 starts the exhaust port according to the following operating procedure:

[0029] Before the fire sourc...