Guangzhou metro line 7 shunde duan midea avenue station right line shield machine "city rail youth" started smoothly

At 8:58 am on June 12, the shield machine "city rail youth" on the right line of beijiao new town station from midea avenue station of guangzhou metro line 7 section 04 to beijiao new town station started off smoothly at midea avenue station, and the roar of the shield machine set off the climax of the shield construction of this project.

The shield tunneling machine of "city rail youth", which started this time, mainly undertakes the task of the shield tunneling construction of the right line of the avenue station of beauty. The total length of this area is 1923.95m. The main route is to cross beijiao shahe river and then linxi river. The length of crossing linxi river is 590m, among which the minimum radius of the tunnel is 450m. While crossing linxi river, shangchuang beijiao xincheng station to gaocun station is the right line tunnel. The total length of the overlapping section of the two lines is 110m, and the minimum spacing of the overlapping section is only 3.98m.

In the interval from midea avenue station to beijiao new town station, the geology is mostly silty soil. The low strength of silty soil leads to the increased difficulty in controlling the driving attitude of shield tunneling machine. In addition, rain or shine uncertain weather is encountered during the construction, which brings great difficulties and challenges to the shield construction.

Faced with these complicated problems, the guangzhou metro line 7 04 bid project department planned ahead and made "three early" plans in advance -- early planning, early investigation and early deployment. Through continuous optimization of shield tunneling construction scheme, experts were invited to carry out on-site demonstration and review of major hazard sources and risk points for many times. The thorough analysis and full demonstration of experts provided reliable technical guarantee for the smooth starting tunneling of shield tunneling machine.

Next, the guangzhou metro line 7 04 standard project department will continue under the leadership of shunguang company, under the premise of ensuring the quality and safety of the project, complete the construction task seriously.