A tunnel accident in Yunnan caused 3 deaths and 4 injuries.

On July 29, a tunnel of the Tunnel of the Crane Sword Lan Expressway project in Yunnan occurred. At present, the accident caused 3 people to be killed, 4 injuries, and one lost contact. Relevant departments were trying to organize rescue. Related information shows that there are more bridges and tunnels on the entire line of Crane Sword Lan Expressway, with a bridge tunnel ratio of 54.61%. Earlier, some experts published an article saying that the speed was particularly fast at the time of the outbreak of the mud, and the personnel had no time to evacuate. Therefore, the main prevention of Tuantu water was mainly prevention.

"Dali released" WeChat public account news, at 21:10 on July 29, a tunnel of the Tunnel of the Crane Sword Lan high -speed project occurred. After the initial nuclear, the location of the occurrence of the mud water was ZK3+814 at the left hole of the tunnel. At the time of the incident, there were 10 people in the tunnel, of which 2 were successful and 8 were trapped. After the on -site rescue and disposal, 7 people have been searched, two of them have no vital signs, and one person died after rescue. Four people were injured and were fully treated. One lost person is in search and rescue.

(Picture source: Dali Published)

After the incident, the relevant departments rushed to the scene in time. Government and enterprises jointly established the emergency rescue headquarters. Under the guidance of relevant provincial departments, they organized and commanded rescue disposal. At present, the headquarters set a total of 231 professional rescue forces, and invests in 24 sets of emergency rescue equipment such as satellite command vehicles, life detectors, geological radars, and pump pumps to organize rescue. The work of good after -treatment and order maintenance is carried out in an orderly manner.

What is a mud water? Several related articles reprinted by China Journal Network wrote that the fissure of the surrounding rock cracks caused by stress release was expanded, causing the sudden groundwater in the tunnel. Tunnuchiwater accumulates a certain energy in the rock layer. Because the advanced detection methods are not timely, the energy that is not effectively discharged and eliminateds the accumulated energy is not carried out. During the tunnel excavation process, because the hard water -transparent layer gradually decreases, it should be inherited by the impermeable water layer. When the pressure capacity is less than the pressure of the water head, the impermeable water layer is destroyed, and a large amount of water protrudes under the pressure of the pressure, which causes the water; when a large amount of weak filling in the water is mixed with a large amount of weak filling, the mud is formed. The speed of the tunnel burst water is particularly fast when the outbreak of the pouring water (its speed is 15m/s). Once the outbreak, the personnel can not evacuate at all, which will bring personnel damage and a lot of property losses.

According to experts from tunnels and Jingxiang, usually, the methods and measures for the prevention and control of the pouring water also include measures such as drying, lowering blood pressure, river diversion, and anti -seepage of water -containing layers; Anti -seepage walls, leaving water ore columns, use local grouting processing trees, filling collapse and other measures.

Jimu reporter noticed that before the official website of the Yunnan Provincial Department of Transportation published an article "Entering the Crane Sword Lan Expressway", it wrote: Crane Sword Lan Expressway is 100.839 kilometers in length. The speed is 80km/h, and the width of the roadbed is 25.5m. There are 47 bridges and 12 tunnels across the board, including 4 special tunnels and a bridge tunnel ratio of 54.61%.

Crane Sword Lan Expressway is an important channel for China Unicom Dali, Nujiang State and Heqing, Jianchuan and Lanping. It is an important channel to connect the two trunk roads of Dali and Shanghe, and it is also the economic life of the golden tourist area in northwestern Yunnan. The construction of the urban agglomeration of northwestern Yunnan, improve the structure of the highway road network of the province in Yunnan, enhance the level of the country's trunk road transportation services, alleviate regional traffic pressure, and promote the development of the economic and global tourism development in northwestern Yunnan.

Jimu Journalist Zhang Hao Du Guangran Comprehensive Dali Release, Science and Technology Daily, China Journal Network, Yunnan Provincial Department of Transportation, etc.

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