【 Weak current College 】 transportation of fire---tunnel and subway fire-Power By 【 China power house network 】

With the development of the society, all kinds of transport facilities, tunnels and subway (Metro) is one of the two. Tunnel including rail, road and underwater tunnels. Metro is constructing the underground mass transit system, by stations, tunnels, passenger facilities, passenger cars, power transformation and distribution facilities, traffic signals, ventilation and drainage equipment and component dispatching agencies, mainly for urban transport, urban traffic is an important symbol of modernization. As the tunnel and underground railway building complex structures, environment confined, plus staff-intensive, in the event of fire, fighting quite difficult, often causing significant casualties and property damage. Therefore, the need to strengthen the fire protection of tunnels and underground work. A £ ® 1 £ ® tunnel fire risk assessment (1) vehicle electrical circuit, vaporizer malfunction, truck pneumatic system failure, fire, etc. (2) a narrow tunnel road, visibility is poor, the situation is more complicated, susceptible to vehicle crash, may also cause tunnel fire. (3) tunnel passage of vehicles, goods may be flammable or explosive substances, in case of fire (or heat) or spontaneous combustion occurs. (4) the failure of railway track, train Subversion (in particular oil tank cars) cause a fire. 2. Metro (1) subway station as the decoration, equipment, Office, life there is a certain quantity of combustibles that if electrical equipment failure, staff regulations, production of life use of fire power accidentally, which may cause a fire. (2) cited car tunnel construction maintenance for welding, cutting, smoking staff, as well as with fire accidentally train arcing can ignite combustible materials inside the tunnel fire. Tunnel installation of cables, electrical equipment because of humidity, improper use of rodent, repair fails, it will easily cause road tunnel fire. (3) a passenger who fails to comply with the safe rides, unauthorized carry inflammable rides in the car with fire, smoke or car electrical equipment failure, ballasts reduce fouling oxidation conductive properties, as well as bad, Pocket hanging run line conductors caused a short circuit on the arc, which may cause a fire. (4) substations of working conditions, humidity, dust, bad ventilation, also lead to equipment failure and fire incident
It. 2. fire prevention measures 1. tunnel (1) the material used in tunnel fire resistance should 1.5 ~ 2/hour. Ventilation system should use of combustible materials as gloss asbestos lining made of a class. Tunnel lighting, telephone box and fire extinguisher box application also noncombustible materials. Cable fire-retardant cables or applied cable, various electrical circuits should wear protective tube. (2) a long tunnel fire partitions should be divided. Air shaft and tunnel communicating door between all should be made into class a fire doors, fire resistance 1.2 hours. Common use of noncombustible materials plug holes. Cable tunnel fire resistance 1.5 hours of asbestos plate, calcium silicate Board and other horizontal dividers (spacing 1OO m). Double hole tunnel between two hole should be used in the passage of fire door panel. (3) tunnel should have a fixed water spraying fire extinguishing systems and fire alarm system, and equipped with all types of portable fire extinguishers. (4) tunnels TV monitoring system should be able to observe the tunnel ends near the entrance to the ground and tunnel all or any part of the situation. Monitor screen position and the tunnel profile — a corresponding. At the same time, you should set the alarm display board, convenient driver handling emergencies. (5) sets the evacuation shelter facilities, such as the asylum channel, tunnel on either side of the road, induced by site-directed emergency shelter, etc., for a two-hole tunnel, you can contact the channel as a refuge facilities. At the same time, it should also be set with a battery of lighting, emergency broadcast, lightbox-type induction logo, evacuation, etc. (6) tunnel should be horizontal and vertical two ventilation mode. If necessary, adopt-a-half transverse and longitudinal ventilation mode, a short distance of tunnel ventilation with natural or mechanical ventilation, natural air, air, natural or mechanical ventilation. (7) it should also be set other fire fighting facilities, such as fire attack road design, intercepting Groove or combustible liquids grooming Groove settings, etc. (8) strengthening tunnel fire management and traffic management, such as not free parking passes, restrictions contained flammable or explosive and other dangerous goods, vehicle, etc.; and regular checks of tunnel fire safety work. 2. Metro (1) subway station layout should be reasonable, a firewall, the water curtain or fireproof roller doors, make the necessary fire smoke. Building and decoration of the exposed part of the station facilities, equipment, Office supplies should be non-combustible or nonflammable, strictly limit the use of various plastic products, limit the number of electrical appliances in use. In the intra-site prohibit the storage or carry flammable, non-smoking, and periodically clean the combustible waste. In the station's security export, channel crossing, near the stairs, while settings such as parts of the emergency lighting and evacuation guidance signs. Site of the substation, wind room, communicating rooms, dispatching, and other important equipment, should install automatic fire alarm and automatic fire extinguishing systems. The establishment of the entire station, wind, water, electricity and broadcasting communication centralized control of disaster prevention and control center, and with superior's disaster prevention Center and fire departments constitute information network, as well as finding and dealing with fire. (2) subway tunnels should strengthen the fire protection management, maintenance and construction of oil and other flammable materials should be properly safeguarded and strict restrictions on the use of quantity. Welding gas cutting jobs to take strict security measures, the job is finished do work Dude, preventing the left from the fire. Prohibit the storage of combustible substances inside the tunnel, the laying of cables, wires should be non-combustible, flame retardant, non-toxic, resistant to moisture and rodents, laying in special fireproof or grooved. To periodically clean the road tunnels of combustible waste and train line conductors. All electrical equipment, moisture-proof measures should be taken. (3) Metro buses should use non-combustible material manufacturing. Strictly forbidden to carry inflammable, explosive and other dangerous goods car, not smoking in cars with fire, prohibition of storage of fuel on board. Repair of cotton yarn and other fuel should be properly addressed. Marshalling of the train, running the car for passenger should be located between the movement ofConnecting door, door lights should be installed in the vicinity of the accident, at the same time strengthening the ballast, cables and wires connectors check maintenance. Train Depot, the remnants of passengers should be cleaned up in the guest room of fuel and power off the vehicle. (4) Metro substation, high-voltage cables should be laid in the floor construction, variable electrical substations and other important equipment room, room should be separated by a fire, and install automatic fire alarm and automatic fire extinguishing equipment. All levels of power distribution equipment (tractors, power lighting levels and distribution screen), you should install the perfect overload, leakage, undervoltage, overvoltage protection circuit and alarm device. Underground electrical device should use non-oil-type, on the existing oil-immersed transformer substation equipment should be taken to set the drainage basin, oil, prevent the dykes of oil spills. (5) of the Metro of ventilating equipment selection in the design must take into account when the smoke of a fire, with instantaneous inverse wind function, high-temperature conditions to maintain the work and start the long distance remote control. Fans should be important load power supply, two on each end of an alternate power source, should be able to automatically switch. Duct should consider in the event of a fire and evacuation channels use, do not hold any incidentals. (6) communication equipment and dispatching agencies fire requirements can reference language "electronic computer centres and facilities of fire".