Yesterday morning, one Taiwan "Citroen 5" Shield quietly stopped at the Chengdu Metro Line 2 ginkgo forest station, which has just crossed the Shu Victory Road - ginkgo forest left lane of the 26 range old-intensive construction Group, to break down the "scourge of Chengdu subway", and "Shu white" shield wire through interval, the highest number of Chengdu Metro through the building the most.
Known as the "world-class problem"
It is understood that extend the length of 2002 meters, "Lin Shu Road Station to Station ginkgo" Shield Zone, following the high water-rich sandy gravel stratum, the above is old and dense buildings. November, according to Bureau of China Railway Group Ltd. and deputy general manager of Chengdu City, Metro Rail Project Manager Lee introduced proper way, the range of gravel content of up to 60% -80%, the maximum diameter of 50 cm gravel about subway construction extremely difficult and was construction unit known as the shield of the "world-class problem."
After the construction is more firmly through the
According to construction units introduced through the shield, the "Shield of housing construction after the foundations more solid than before, overall more good." Why? It turned out across the road in order to ensure the housing subway safety, through the former, the construction personnel will be pre-grouting of the housing, the construction unit to be set to play through the building housing reinforced holes in the shield across the front, first hit the note reinforcement pulp pre-hole, so that through the period, the residents do not feel a strong shield in the shield construction, the construction side but also to synchronize grouting and again after the passage of the shield to fill grouting for construction and observation, until the building stable.
The end of May the first phase across the board "hole through"
Currently, the 2nd line a project has been driving about 3.2 meters, accounting for 96% of the total length of tunneling is expected to achieve by the end of May this year across the board "hole through." Line 2 Line 3 sets the West Extension was boring machine began to go down April 4 driving, and has completed about 9% of the driving task.
In addition, 2 Line of the West has now entered the extension phase of mechanical and electrical installation of Line 2 has already begun laying some interval, is expected to be opened next October; extension with the West line with the second phase of 2 East extension will also strive to commence in May this year, the fastest opened to traffic in 2013. Source: Chengdu Evening News
