The first shield machine on the west extension line of nanjing metro line 2 started off

As one of the most dense subway lines in nanjing, the construction of the 5.6-kilometer west extension of line 2 is under way. Reporters learned from the relevant departments, just last week, with the "pioneer 1" shield machine cutter slowly rotating, the line's first shield machine officially began underground shield work, which also represents the whole line 2 west extension line into the new stage of engineering construction.

According to the introduction, "xianfeng no. 1" shield machine is earth-pressure balanced shield machine, with the diameter of 6.868m and the total length of the main engine 9.3m. The shield tunneling started from d2w-ta04 standard tianbaojie station to qinglian street station. The total length of the right line in this area is 1054.5 meters, and the outer diameter of the pipe segments is 6.6 meters. The installation of ring 871 needs to be completed in the shield tunneling project. The shield section of the whole d2w-ta04 standard section is 7.23m at the shallowest overburden of soil layer, which is mainly composed of layers of miscellaneous filling soil layer, silty clay and silt silty clay, which is difficult to construct. Among them, the "tianbaojie section" shield shield out of the tianbaojie station along qinxin road east, down through the luotang rain water tank culver, the upper trans-ning and inter-city, down through longwang street, side through luneng mansion, arrived at qinglian street station.

According to previously published content, line 2 west extension line from the current line 2 terminal oil mill bridge station derivation, using big downhill after the outbound pingliang street wear, southwest lotus road south, along the river through the city after the highway into Qin Xinlu, towards the west, along Qin Xinlu respectively at the beginning of the permanent road intersection set screw pond street station and line 7, transfer, in the violet violet street station, set up in the street intersection in tianbao street intersection set tianbao street station, fish mouth in head off street intersection set the terminal station and transfer to line 9. At the end of the line, there will be a fish mouth parking lot on the south side of xinhe road and the north bank of qinhuai xinhe river.

The project is expected to be completed and open to traffic in 2021 at the soonest. In terms of vehicle selection and marshalling, the project is in line with the existing line 2. The maximum speed of the train is 80 km/h, and the operation time is 5-30 -- 23-30, with a full day operation time of 18 hours. After completion and opening to traffic, it will become the second subway line in aonan district after ning and inter-city.