Shanghai chengtou group said that after successfully crossing line 11, Shanghai's largest diameter shield, zongheng, was successfully pushed to the 600 ring road, completing the annual construction node of beiheng tunnel seven days ahead of schedule. "Zongheng no." started from the working well of zhongshan park of the north horizontal tunnel project in June 2018, and began the tunneling task of the eastern section of the western line. Let's review its history
In June 2018, Shanghai's largest diameter shield, "zongheng no.," started to work in the zhongshan park working well of the beiheng tunnel project, and began the tunneling task of the eastern section of the western line. The project was invested and constructed by Shanghai chengtou highway group, and Shanghai tunnel shares participated in the construction of the tunnel. Compared with the western section of the western line, which has been promoted and completed before, the eastern section will pass through all kinds of structures on a large scale, including 5 pieces of rail transit (3 in operation state and 2 in construction state).
An important task of the crossbar shield this year is to go through the operating tunnel of the subway line 11, longde road station to jiangsu road station. It is the first time that a shield with a diameter of 15 meters undergoes a subway tunnel in China, and the minimum net distance between the two is 7.06 meters.
November 16, 10 o 'clock in the morning, "and" the knife dish formally entered the 11th line tunnel directly, from the shield cutter head into the 11th line below the plane left illustrating the scope to shield tail, a total of 22, 44 meters long, "and" at the rate of average 7 ring every day with all its strength, and the construction of the online manned 24 hours a day, after 70 hours of intensive work, 9 o 'clock in the morning on November 19th completed the crossing on metro line 11. Through monitoring, the tunnel deformation of line 11 is controlled within the prescribed range, and the subway operation is not affected.
In the more than six months of the tunnel's advance on the eastern section of the western line, the crossbar shield successfully advanced to the 600 ring road on December 23, completing the annual engineering node of the north cross tunnel seven days ahead of schedule.