Lanzhou Metro 1 Line

The route map of Lanzhou Metro 1 line is as follows:

Lanzhou Rail Transit 1 Line is the first rail transit line in Lanzhou City, Gansu Province, China, and the first rail transit line under the Yellow River in China. The whole line was started on March 28th, 20 14, and put into operation on June 23rd, 20 19, with blue logo color.

Lanzhou Rail Transit 1 Line starts from Chenguanying Station in Xigu District in the west, passes through Anning District and Qilihe District, reaches Donggang Station in Chengguan District in the east, and crosses the downtown area of Lanzhou from east to west.

As of September 2020, the total length of Lanzhou Rail Transit 1 line is 25.909 kilometers, all of which are underground, including 20 * * * * stations, all of which are underground stations, and the trains are grouped into 6 A-type trains.

Main projects:

The geological environment of Lanzhou rail transit 1 line is extremely complicated, especially the shield section between the two spans of the Yellow River is a long-distance gravel stratum with a large number of boulders. Due to the stratum and hydrological conditions, the risk of water gushing and sand gushing in the tunnel, the shield construction is prone to collapse. Lanzhou Rail Transit 1 Line initiated the domestic precedent of shield crossing the Yellow River safely.

The pebble content and timely content in the Yellow River section are extremely high, the water pressure is high, the uncertainty of sand mining area and geological exploration hole is high, and the risk of crossing the Yellow River section is high. Therefore, it is necessary to replace the shield machine tool under the high pressure of the Yellow River bed to solve the technical problems such as poor geological stability of red sandstone and difficult foundation pit construction.

After overcoming several major engineering difficulties, such as crossing the Yellow River four times, crossing Xiaoxihu overpass sideways and crossing Zhangye Road pedestrian street, the tunnel is fully connected.