Today, with the "pioneer" shield machine cutting through piles, it marks the smooth opening of the shield tunnel from xianglong station to xingsha station in line 3 of changsha metro line 14, and it also declares that all the tunnels in the xingsha area of line 3 of changsha metro line are through. It is reported that this is the first time for zeng to run a medium-high speed railway tunnel in China.

On September 8, the "communist youth league" shield machine of nanchang metro line 4 from anfeng station to dongxin station successfully started from the wind shaft on the east bank, marking the official departure of two mud-water shield machines "shuanglong crossing the river" by the project department.

On September 2, according to the official website of hefei rail transit, recently, the shield tunnel construction of hefei rail transit line 5 has been successful, and several shield tunnel sections have been successfully completed, the total amount of shield construction has been completed more than 60%.

On August 28, the last shield tunneling machine in shenmei section of shenzhen metro line 6 went out successfully, marking the successful completion of the tunnel.

Shanghai, Aug. 24 (xinhua) -- the first domestically made large-diameter mud and water balance shield machine "jiangpu" entered Shanghai on Aug. 24 and started its construction smoothly. This equipment is jointly developed by China railway construction heavy industry and Shanghai foundation company, and has completely independent intellectual property rights. The excavation diameter of the equipment reaches 11.63m, the total weight is about 1900t, and the installed power is 3661kW.

On the afternoon of August 21, the reporter learned from kunming railway company that the left line of shield tunnel between the north railway station and bailong road station was successfully completed yesterday. This marks the successful reception of the shield of the first deep buried overlapping tunnel of line 4, and the successful completion of the 58th single line section of line 4 project.