The hottest Jiaozhou Bay Tunnel has the highest fi

2022-09-19
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On June 28, the Jiaozhou Bay Tunnel accepted the final acceptance of fire protection. After the joint inspection of the provincial fire brigade and the Municipal Public Security Fire Bureau, the tunnel fire protection acceptance was passed. Whether it is civil engineering or decoration, the fire rating of the tunnel is the highest, and the fire resistance limit of the fire retardant coating is not less than two hours. On the wall on the right side of each tunnel and ramp, a set of fire boxes are set every 50 meters to meet the fire protection requirements. The tunnel is also equipped with fiber Bragg grating temperature sensing fire detector, which can monitor the temperature change in the tunnel with high sensitivity. After the operation of the tunnel, vehicles with dangerous goods are forbidden to pass through, and it is forbidden to carry inflammables and explosives through the tunnel in various ways

the fire resistance limit of the fire-proof coating is not less than two hours

the tunnel has fully and comprehensively considered the requirements of tunnel fire protection during the construction process and the later ancillary installation works, and has put forward strict requirements and standards for the quality of all fire-fighting materials and facilities. In the aspect of tunnel civil engineering fire prevention. The fire rating of the subsea tunnel is class I. the tunnel construction adopts a composite lining structure, and the thickness of the reinforcement protective layer is 7 cm, which is higher than the fire rating of ordinary buildings

according to the needs of fire prevention and aesthetics, fire prevention is also considered in tunnel decoration. Among them, the wall and vault of the main tunnel are sprayed with fire-proof coating, which has a high bonding strength with concrete, a fire rating of class A, a fire endurance of no less than two hours, and has the characteristics of anti-aging, corrosion resistance, non-toxic and flame retardant. The toxicity test has reached the safety level. The tunnel side wall adopts dry hanging enamel steel plate, which has good fire prevention function and will not release toxic and harmful gases in the fire environment. The pavement is also made of flame retardant asphalt

fire fighting facilities are equipped with a group of fire boxes every 50 meters

in terms of tunnel electromechanical fire fighting system facilities, full consideration has also been made. The single systems that have been debugged include: broadcast and emergency system, fiber Bragg grating alarm system, fire shutter system, jet fan system, fire extinguishing system, and water-borne film foam fire extinguishing system. Fire hydrants and fire extinguishers have been equipped in place, and the fire pump has been installed and commissioned. It is learned that the fire extinguishers equipped in the tunnel are ammonium phosphate dry powder fire extinguishers and light water foam fire extinguishers. The fire extinguishers are staggered on both sides of the left and right tunnels and ramps. A group of fire extinguisher boxes are set at a distance of 100 meters on one side, and 335 groups of dry powder fire extinguishers are set in the whole tunnel. Each box is equipped with 2 bottles of 5kg ammonium phosphate dry powder fire extinguishers and 2 bottles of 9L light water foam fire extinguishers. The RS232 port can also accept the instructions of other equipment. The tunnel is staggered on both sides. A group of fire extinguisher boxes are set at a distance of 100 meters on one side. The whole tunnel is equipped with 123 groups of dry powder fire extinguishers. Each box is equipped with 4 bottles of 5kg ammonium phosphate dry powder fire extinguishers

on the wall on the right side of each tunnel and ramp, a group of fire boxes are set every 50 meters. Each fire box is equipped with a single head and single valve fire hydrant, 2 sets of water hoses, 1 multi-function water gun, a fire hydrant start button and a set of self-help small caliber hose reels; There are 333 sets of fire hydrant boxes

safety management inflammables and explosives are prohibited from entering the tunnel

the tunnel is a closed space, and inflammables and explosives are very easy to explode once they encounter friction. For the safety of the traffic environment, it is strictly forbidden to carry inflammables and explosives through the tunnel in various ways. "According to the tunnel management measures, dangerous goods vehicles are prohibited from passing, so the possibility of fire in the tunnel is very small." The relevant person in charge of Guoxin transportation company said that even in the event of a fire, the water-based film-forming foam fire extinguishing system, fire hydrants and fire extinguishers installed in the tunnel can meet the requirements of fire control, which need to investigate and collect public opinions; Please. In addition, the tunnel is equipped with fiber Bragg grating temperature sensing fire detector, which can monitor the temperature change in the tunnel with high sensitivity

in the tunnel, fiber Bragg grating temperature sensing fire detectors are laid longitudinally on the top of the tunnel, and the detector links are arranged in double rows in the tunnel, with the spacing between adjacent detectors not more than 10 meters. When a fire occurs in the tunnel, the system will directly output the alarm signal, and the host will send an audible and visual alarm at the same time. The fire alarm controller will transmit the signal to the computer in the control center through the communication port. The computer can display a visual alarm interface. After manual confirmation, the system will output the alarm and use a square level with a precision of 0.05/1000 to correct other control signals respectively

fire escape when escaping, the car key is left in the car

if there is a fire in the tunnel, how to escape? The tunnel operation unit has prepared emergency plans for various accidents that may occur. When there is a fire in the tunnel, the management personnel of the tunnel management unit can find it through video, notify professional firefighters to deal with it, and carry out evacuation and rescue at the same time. When the driver and passengers find a fire, they should timely use the manual alarm button, the innovative design of emergency but parts and the promise of technology to help solve these problems. The rescue workers will rush to help put out the fire at the first time. The fire rescue vehicle can also arrive within 5 minutes

in case of fire, the vehicle in front of the fire point will continue to drive out of the tunnel, and the personnel behind the fire point will stop the car to the right as far as possible, and the car key will be left in the car for the convenience of tunnel personnel to deal with. Then, in an orderly manner, according to the guidance of the radio and tunnel staff, they will quickly leave the scene of the accident and enter the pedestrian cross hole, vehicle cross hole and emergency exit set between the tunnels to escape. The fire fighting work will be carried out by the professionals of the Municipal Public Security Fire Bureau. After the accident, the tunnel staff will contact the owner in time. In the sea area section, a crosswalk is set every 250 ~ 300 meters, and a crosswalk is set every 750 meters; At the terminal of Qingdao, due to the long distance between the two main tunnels, emergency exits leading directly to the ground are set at an interval of about 250 ~ 300 meters

in order to ensure driving safety in the tunnel and prevent accidental traffic accidents in the case of sudden loss of external power supply, a special uninterruptible power supply is set in the tunnel lighting system, and the power supply duration is more than 90 minutes

note: the reprinted content is indicated with the source. The reprint is for the purpose of transmitting more information, and does not mean to agree with its views or confirm the authenticity of its content

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