original title:How to build the “underground kingdom” of the three subways in Wuhan that opened on the same day?
Xinhua News Agency, Wuhan, December 26 (Reporter Deng Nan) “The subway has no driver’s cab, unmanned, and full of science fiction.” On the morning of the 26th, the first fully autonomous subway line in Hubei-Wuhan Metro Line 5, citizens Sun Jingyue couldn’t help but sigh as he watched the scenery flying across the tunnel and on the ground through the huge glass at the head of the train. On the same day, Wuhan Metro Line 5, Line 6 Phase II, and Line 16 (Hannan Line) opened simultaneously. “City of Hundred Lakes” Wuhan has added 75.2 kilometers of subway lines and 42 stations at one time, realizing full coverage of the urban area of rail transit.
Once, building a subway in this city where the two rivers meet was affirmed by many as “impossible.” “There is a lot of water, sand, and silt. The construction is difficult and the risk is extremely high.” said Zhou Gejun, the first-level project manager of the Wuhan Metro Group Construction Business Headquarters. The Yangtze River and Han River pass through the urban area of Wuhan. Karst caves are interspersed among them, and the complex geological structure has brought a lot of obstacles to the construction of rail transit.
“When there is no subway, it takes more than 2 hours to cross the river from Hankou to Wuchang by bus. There are more and more private cars, and it is common for the water to be blocked.” Aunt Xie, a 65-year-old Wuhan resident, said that repairing bridges and roads is far from possible. Meet the travel needs of more than 10 million citizens in the three towns of Jiangcheng.
In 2004, the entire elevated light rail line No. 1 started operating in Wuhan, making Wuhan the seventh city in mainland my country to open rail transit. From above ground to underground, there is always a threshold that is difficult to cross.
In order to traverse many barriers such as the hardest-hit areas of karst caves and the ultra-shallow buried sections of artificial miscellaneous fills, the Wuhan Metro Group construction team excavated interval tunnels, built pump room connection channels, and adopted shield tunneling and manual excavation according to different geological conditions. . It took 5 years. In 2012, the first phase of rail transit line 2 was opened, and the long-distance travel time across the river was shortened by half.
According to the fourth-phase rail transit construction plan approved by the state, by 2024, the mileage of Wuhan Metro will reach 606 kilometers.
“The 17-year construction of the rail transit network has made the three towns of Wuhan beaded and made an important contribution to the acceleration of Wuhan’s move to a national central city.” said Sun Xiaoli, an expert from Wuhan Transportation Development Strategy Research Institute. “With increasing growth, more residents will share the dividends of urban development.
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