Directly hit the submarine steel giant beast to change the "teeth" reporter to enter the country's largest diameter of the seabed shield tunnel project

Mother Bay Sea Tunnel under construction

Text/Yangcheng Evening News all -media reporter Song Wangqun

Figure/Yangcheng Evening News all -media reporter Wang Lei

At 11:18 on August 30th, the Shenzhen Mom Bay Cross -Sea Channel Project faced the "Pengcheng" shield machine on the left of the submarine tunnel on the left line of the submarine tunnel. The meeting office is located in the hard rock of the full section of 30 meters below the sea level. This meeting means that the shield machine has overcome the biggest risk of the submarine excavation, laying the foundation for the successful digging of the shield machine.

Recently, a reporter from Yangcheng Evening News walked into the "Mom Bay" shield machine construction on the bottom of the sea. He interviewed the 25 -player team responsible for controlling this "underwater beast" and directly hit the engineering and technical personnel on the bottom of the sea. The process of normal pressing knife. After a few months, after the completion of the Moman Crossing Channel of Shenzhen's first submarine tunnel, Shenzhen citizens can drive directly on the bottom of the sea.

The staff works inside the shield machine knife plate

Dig the edge of the shield machine and lay on the side

The 2000 -meter submarine tunnel has been completed 1300 meters

On the afternoon of August 31, the reporter of Yangcheng Evening News entered the work process of this "Underwater Steel Giant" at a distance of 30 meters from the sea floor tunnel at the sea floor.

The "Mom Bay" shield machine started from the Dajowan Wharf and digs from the north to south. The reporter entered the underwater tunnel from the Greater Shijo Bay Tunnel. At this time, the "Mama Bay" shield machine was fighting at the bottom of the sea about 1300 meters from the tunnel. The lights inside the tunnel were bright. The reporter saw that the road base of the middle car in the tunnel was basically completed, and the engineers were laying on both sides of the road. On the walls on both sides of the tunnel, two pipes with a diameter of about 30 cm are extended from the tunnel entrance to the tunnel, divided into "pulp pipes" and "pulp pipes". "". "The shield machine crushes the bottom of the sea to a 10 cm -sized stone, and uses the pipeline to discharge outside the tunnel." The engineers introduced that the total length of the Mom Bay Underwater Tunnel was about 2000 meters, and the left and right tunnels were laid 3 lanes. Essence On the west side of the "Mom Bay" shield machine, another "Pengcheng" shield machine is digging from south to north.

After a few minutes of drive, the huge "Mom Bay" shield machine came into view. The reporter walked from the tail along the passage to the interior of the shield machine. In order, various systems were distributed around the shield body, such as ventilation and refrigeration system, sewage system, ventilation system, pressure preservation system, pussy soil system, material lifting system, electrical electricity, electrical electricity Systems and so on. Later, the reporter came to the front end of the shield machine. This is also the core of the shield machine. It is distributed with a central control room, assembly machine and blade.

Li Haolei on site engineers introduced to reporters that the knife is responsible for digging, and the assembly machine in the shield is responsible for the laid concrete pipes of the inner wall of the tunnel. Every time the shield machine is excavated, the assembly machine will install the concrete tube to the specified location. At the same time, vehicles and institutions that specialize in transport tube films will continue to provide new pipes to the assembly machine. With the precision coordination of each system, the shield machine is excavated and scum, while laid concrete tubes for the inner wall of the tunnel. In this way, the tunnel is excavated one meter and one meter. "The total length of the Mom Bay Sea Tunnel is about 2000 meters. At present, the" Mama Bay "shield machine has been excavated from north to south of 1,300 meters. It is expected to cut through the end of this year and early next year." Li Haolei said.

The staff conducts a normal pressure change in the interior of the knife plate

From "post -70s" to "post -00"

25 -person team controls 300 million "Underwater Beasts"

In the central control room, three young engineers are always watching the parameters on the dashboard. "I was born in 1999. I just graduated from the engineering major of the engineering of Xihua University in Sichuan this year." Engineers Xiaohu told reporters that he entered the underwater tunnel for 12 hours every day. It is a challenge for him who has just joined the job.

Li Haolei told reporters that he has been working in the shield machine for more than ten years and has dug tunnels in many major cities in China. Two shifts, 12 hours per shift, are divided into multiple teams, including the central control room, the ground monitoring room, and the maintenance team responsible for the shield machine to change the knife. There are all 'after -00', the youngest was born in 2001. "

The reporter learned that the "Mama Bay" shield machine is worth 300 million yuan, which is currently the largest domestic mud water shield in China with a diameter of 15.53 meters and a height of more than 5 floors. The excavation surface is 6 times that of the conventional subway shield. The whole machine concentrates the integration of ultra -high pressure capacity systems, constant pressure sword replacement technology, real -time monitoring technology of knife status, large flow mud water circulation system, expansion swing -type main driver, four -round gas pressure control, high -efficiency slag screening system, etc. Innovative technology. In addition, the shield machine is equipped with a lounge, bathroom, and even air conditioning and WiFi. Staff can use mobile phones to access the Internet on the bottom of the sea.

Shield machine seabed normally pressing knife

The cost of the tunnel is only 30,000 to 40 million

"We are now about 30 meters away from the sea level, and the shield machine is on the rock layer of the bottom of the sea. Compared with the conventional underground shield machine, the requirements of the shield machine of the submarine tunnel are more stringent. For example, the seawater is soaked. Corrosive; and we need to be more pressure on the deeper underwater. The most critical point is that the conventional underground shield machine can open the door to change the knife to the knife. We are equipped with normally pressing knives. It is like forming a bubble on the bottom of the sea. Engineering and technical personnel can enter the bubbles to change the knife to the front -end knife. "Li Haolei introduced. The reporter learned that the technique of constant press knife has realized the knife replacement of the personnel in normal breathing environment. The tool is installed in the blade, and it is transported to the center cone with the help of a crane, a self -drive and a carrier beam. The crane that transports the car on the center cone and moves left and right back and forth to transport the blade to the replacement position. The internal design of the blade of the box -type structure is designed with attachments such as ladders and platforms to facilitate personnel operations. At this time, the knife -changing worker fix the blade. After the gate is opened and closed, the blade is slowly pushed to the palm surface to achieve the safe replacement of the tool. It is understood that the "Mama Bay" shield machine has 79 rolling knives and 145 scrapers on the knife tray with a diameter of 15.53 meters in diameter. The blade is driven by 28 groups of hydraulic oil driven by 100,000 volt high -voltage electricity. The thrust can reach 2700 tons and 27,000 N · m, which is equivalent to twice the time of the Long March 5 carrier rocket.

During the reporter's interview, the on -site engineering staff was pressing the knife at the front of the knife. I saw that the engineers removed a blade of about 50 cm diameter and more than 1 meter in length. The two rolling knives on it had been worn, and the rail vehicle was recovered from the rear side of the shield machine. Put the knife in the blade, and then send it to the inside of the knife, and the engineers are installed to the front -end knife plate. "The knife is responsible for breaking the entire large rock, and then the rock is crushed to a 10 cm -sized stone. The full section hard rock layer is severely worn on the shield machine tool. Rolling a knife, every 50 meters of excavation, you need to replace the scraper. The degree of loss of each knife can be viewed through the central control room. "Li Haolei introduced that the knife is made of high -strength steel, and a rolling knife is worth 60,000 yuan. The cost of only 30 million yuan to 40 million yuan for the 2000-meter submarine tunnel.

Engineering business card

The Momwan Cross -Sea Channel Project is currently the largest diameter of the sea shield tunnel project under construction in China. It starts at the intersection of Momwan Avenue and Moon Bay Avenue of the Qianhai Fine Arts Zone in Shenzhen. ——The cross port of Xixiang Avenue, 8.05 kilometers in length, is divided into two parts: ground road and underground roads. Momwan cross -sea channel is planned to be completed and opened to traffic in 2023. After the completion, it will improve the overseas road network structure of the "Special Economic Zone" in the "Special Economic Zone", linking the port freight transportation and transportation of Nanshan Port District, taking into account the Unicom Mom Bay, Chiwan area and large shovel Passenger transportation in the Bay and other districts realizes the separation and transit of passenger and cargo in the front sea area, the expansion and integration of urban development space, and promoting the connection between the traffic interconnection of the Guangdong -Hong Kong -Macao Greater Bay Area.

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