Chengdu Metro Line 2 of the most advanced TBM excavation tazishan
Use the "Pioneer" shield machine, Metro Line 2 Tower Hill Park Station to Station Fort River tunnel excavation began yesterday
"I declare, 'Pioneer' shield tunneling machine was officially launched!" Yesterday 11:00, deputy general manager of the company 肖中平 in Chengdu Metro Line 2 subway tazishan Park Station press the start button, announced that Metro Line 2 standard civil 15 Engineering tower Hill Park station - Fort River station tunnel shield construction began. "Pioneer" shield machine to go down as the year of the first TBM will arrive destination in eight months.
From tazishan "eat" to shahepu
Tazishan from the ground station to park underground layer 2, one wearing a red "coat" the big guy is banking on the opposite side of the earth opening the mouth, dragged behind a propped up by steel "tail", "tail "followed by a pit next to the shelving of several containers. "This is the Chengdu subway construction in the 'hero' - 'Pioneer' shield machine, which weighs 500 tons, is a big eaters have 'eat' the mud several Metro Line 1 of the tunnel." Railway Baju Chengdu Metro line 2 standard 15 civil engineering project manager assistant Guo Qiang joked.
11:16, deputy general manager of Chengdu Metro Company announced the launch of Xiao Zhongping heading and press the button, suddenly, surrounded by the roar sounded, cutting blade under piles of mud and stones were Shield "swallowed" . Shield of the fuselage after the "tail" also began to run, the long conveyor belt to transport all the muck out. "As long as the middle is not faulty, this 'big eaters' would have to eat eight months, eat destination River Fort, it 'pull' out of the muck on to the back of the container, the gantry crane to the ground." Guo Qiang said.
Tunneling time "clothes"
In the "tail" Here there lap steel, the steel frame wrapped in a curved precast concrete segments. "The steel segment erector called after sending out the soil, put the tube segment erector sent into pieces installed in the tunnels hollowed out, which is equivalent to just dig a tunnel dressed this way not only to ensure that the driving speed , but also to ensure the safety of the rear of the tunnel will not collapse. "Guo Qiang said.
According to reports, the entire Tower Hill Park Station to Station range two-way from Fort River reached 1,803.26 meters, the final tunnel through, at least 7,212 1.5-meter-wide "clothes."
Two heads together and shield machine will "eat"
China Railway construction of eight innings Chengdu Metro Line 2 standard civil engineering include a cut and cover 15 stations and two paragraphs Shield Zone, namely Tower Hill Park station, steel plant station to Tower Hill Park station interval, Tower Hill Park Station to shahepu range. To ensure the shield construction schedule, construction will go down 2 15 standard shield machine, "Pioneer" go down since yesterday, heading towards the direction of Fort River, is expected to arrive by the end of August shahepu then turn into the left lane of tazishan boring; another shield machine in late February originating from tower Hill Park, to the left lane heading steel Plant, steel Plant station arrived at the end of June, the U-turn from the right lane of tazishan boring. Eventually, at the confluence of two TBM tazishan Park Station.
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