Explore the "Life Channel" of the Shantou Bay Tunnel

The Shantou Bay Tunnel is the first sea tunnel in our city. From the main urban area to the south bank, the citizens have a more convenient and fast travel option. How is the tunnel guaranteed in terms of escape, fire protection, drainage, communication, etc.? Today, let's walk into the tunnel together to explore the "life channel" in the tunnel to understand how the mechanical and electrical facilities of the tunnel escort the citizens.

If an emergency occurs in the tunnel, it can be evacuated from the evacuation channel

There are 38 escape ports each for the submarine shield structure, every 80 meters every 80 meters

The one -way internal structure of the Shantou Bay Tunnel is divided into three layers. The upper layer is an exhaust ventilation channel. The middle layer is a driving channel for three lanes. In the past two years, the China Railway Tunnel Bureau Group Co., Ltd. Shantou Bay Tunnel Engineering Project Manager Shi Weilong, the chief engineer of the Mechanical and Electrical Industry Zone of the Ministry of Mechanical and Electrical Industry Zone, led more than 300 participants in the engineering electromechanical team to install drainage, lighting, fire protection, ventilation, ventilation, ventilation, ventilation, ventilation, ventilation, ventilation, ventilation, ventilation, ventilation, ventilation, ventilation, ventilation, ventilation, ventilation, ventilation, ventilation, ventilation, ventilation, ventilation Various electromechanical facilities such as monitoring.

The Shantou Bay Tunnel route is more than 6 kilometers in length and the length of the tunnel is 5,300 meters. It belongs to the special tunnel. Under emergency situations such as fire, how to quickly and safely carry out personnel evacuation and rescue is a major challenge.

During the "business", the reporter learned that the traditional tunnel rescue generally adopted a horizontal rescue method. When a fire occurred on a tunnel on one side, the personnel entered the evacuation of the tunnel on the other side through the horizontal tunnel. The Shantou Bay Tunnel is located in the octa -degree earthquake intensity area, and the seabed shield section is 3074 meters long. The horizontal connection channel is set up. There is a large difficulty in terms of structural design and construction. The internal vertical channels of the structure are evacuated, and the evacuation methods combined with the horizontal evacuation of the non -shield sections on both sides.

The reporter saw in the tunnel that on the left side of the driving direction, there was a rectangular black cover every 80 meters. Instructions for the use of tunnel escape evacuation channels, a total of 4 steps: the operation control box opens the cover, prepares down, downlinks, safe evacuation.

According to Shi Weilong, the safety fire system of Shantou Bay Tunnel is very complete. The main tunnel driving lane layer has a fire alarm comprehensive disk every 40 meters for manual fire alarm and sound and light alarm; a set of fire hydrant boxes and a fire extinguisher box are set up every 40 meters to provide fire fire extinguishing water sources and fire extinguishing facilities. A fire extinguishing nozzle connecting a foam water spray box every 5 meters of the tunnel driving road layer. Once the fire occurs in the tunnel, the fire location will be automatically sprayed on the fire location to "add" to the safety. There are 106 electric smoke exhaust air outlets in the driving lane of the Double Line Main Tunnel, which is 60 meters.

Shi Weilong said that when the fire occurred, the temperature -sensitive optical cable and fire detector in the tunnel automatically detected the fire source of the fire as soon as possible, and fed back the fire signal to the monitoring center. , Linking lighting, smoking, automatic fire extinguishing, ventilation, and broadcasting facilities. At the same time, the vehicle drivers are notified and guided the vehicle drivers of the road through information publishing facilities to stay away from the fire area; Covering, entering the tunnel rescue channel, you can walk or wait for the rescue vehicle to withdraw the tunnel according to instructions to ensure the safety of personnel in the tunnel.

When the fire occurred in the open section of the north and south sides, the personnel were evacuated from the nearby horizontal channel to another tunnel from the fire tunnel, and then evacuated the tunnel from the entrance. There are three horizontal channels for the open sections of the north and south sides of the strait, respectively, with a interval of 100 meters, and a traversal channel of a car dealer and pedestrian.

When the fire occurs in the east -west shield tunnel section, the space below the lane in the tunnel is used as the vertical escape channel. "There are 38 escape ports on the east and west of the tunnel, with a distance of about 80 meters. There are stairwells, front rooms, and wind chambers under the escape port. In emergency situations, personnel should keep calm and according to the obvious indication sign in the tunnel. , Press the evacuation button, you can open the escape cover, and the escape channel through the evacuation stairs to the third floor. After entering the escape channel, you can walk or take the rescue car to the north -north shield shield work well lane rescue layer. The North Bank personnel escaped directly through the shield work well to evacuate the stairs to the ground. The people on the south bank took the rescue vehicle from the shield well to enter the middle rescue lane of the south bank to reach the upper driving lane. Transfer to the ground to ensure the safety of the personnel in the tunnel.

"There are evacuation stairs and front rooms in the lower part of the escape cover of the runway, and the configuration of the pressure of the aircraft is configured to press the front room to press the front room to reach about 30 MPa positive pressure to ensure that the flue gas above will not spread to the evacuation channel. Fire -resistant coatings are performed on the top and side of the driving trail. When a fire accident occurs in the tunnel, the tunnel structure can be protected. "Shi Weilong said.

The standards of electromechanical facilities are high and complete, and the flood prevention standards at the entrance of the hole are met in 50 years.

The reporter noticed in an interview that various types of indicators in the tunnel were very complete, clear, and eye -catching. "There are 544 sets of electricity signs set up by the main tunnel driving channel layer. This is a type of traffic safety facilities that indicate the passage of the tunnel." Shi Weilong told reporters that there is one in the fire facility indication sign. Set at each evacuation staircase, and at the same time, the indicator of the indicator of the staircase is posted at the front of the staircase.

In addition to the various indications, the main tunnel driving lane layer has 62 information release systems, which are variable information logos, variable speed limit signs, lane indicators, and are distributed in the entrance and exit of the tunnel and the midline of the tunnel. The role is to guide the vehicle safely. In addition, the Lighting of the Gulf Tunnel has two power supply. When foreign power supply and power outage, the emergency power device installed by the tunnel itself can meet the 90 -minute tunnel emergency lighting. The tunnel route is more than 6 kilometers in length and deep in the bottom of the sea. During the experience process, the mobile phone signal was rarely affected. It is understood that in addition to the three -network mobile phone signal coverage, there is also an emergency phone. Once an emergency occurs, the residence personnel can directly contact the central control room of the tunnel management center as long as they click on the green button. Shi Weilong introduced that the emergency telephone and wired broadcast subsystem in the tunnel were used to use the 316 speakers in the tunnel or 68 indoor types and 14 outdoor emergency telephone separators to achieve real -time live and monitoring center personnel on the spot and monitoring center personnel Call, speaker also has a partitioned broadcast function.

How does the bay tunnel deep below the sea give water drainage? The tunnel is introduced by the neighboring municipal water pipeline; the entrances of the tunnel are set up with rainwater pump rooms, with a total of 5 rainwater pump rooms, 4 wastewater pump rooms, and 2 fire pump rooms. In order to cope with precipitation during the flood season, the drainage system of "cutting from the cave and low -point drawing" was set up in the tunnel, and the drainage design standards that encountered 50 years were used.

At the entrance and exit of the south bank of the Shantou Bay Tunnel, a reporter saw that each side of the tunnel cave was set up with two intercept bands, which can drain the rainwater to a rain well with a capacity of 500 cubic meters. In order to intercept most of the rainwater, so that it does not enter the inside of the tunnel. There are 4 110 -kilowatt submersible pumps on each hole at the north and south banks of the Gulf Tunnel. There is another drainage ditch in the tunnel, and the water on the road surface is brought to the wastewater pump room in time to discharge the tunnel through the submersible pump mechanical.

Shi Weilong said that the electromechanical engineering of the Shantou Bay Tunnel is a system engineering with many professional subsystems, high equipment configuration standards, and many functional requirements, mainly including tunnel ventilation, tunnel power distribution and lighting, tunnel displacement and fire protection, tunnel monitoring, etc. system. In order to achieve fast and effective management and use of various subsystems, set up integrated platforms for comprehensive monitoring, collecting, analyzing and issuing instructions on the data of electromechanical equipment to achieve overall monitoring of the operation of the tunnel. , Ensure driving safety in the tunnel.

(Source: Shantou Daily)

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