Guangzhou metro line 18 shield machine S bend how to pass

At the construction site of pazhou west section of guangzhou metro line 18, the cutter began to dig slowly, marking the first time that the fastest subway tunnel in China will cross the pearl river for a long distance. This shield tunneling machine will propel more than 1600 meters under the pearl river in an s-shaped manner, which will be the first time to challenge the long distance and small radius crossing the pearl river system in the field of underwater tunnel construction in China.

The shield tunneling machine needs to go down about 1600 meters (long distance) through the main channel of the pearl river, and it also needs to go down through the liade bridge, with two turns at a radius of about 600 meters (small radius) (type S). Engineering geology is complicated, technical difficulty, construction level requirements, construction risk coefficient, sensitivity of external environment are very rare in the same type of construction in China.

In view of the complex underwater strata structure of the pearl river, the technical team gives play to the leading technical advantages of crossing the "river, lake and sea city" for many times, and makes full use of the technical force of qian qihu academician workstation to carry out scientific and technological breakthroughs with a number of domestic universities. When crossing the main channel of the pearl river, because it is impossible to monitor the ground subsidence, the builders strengthen the monitoring measurement by means of tunnel fluctuation and horizontal displacement monitoring, strictly control the tunneling parameters, and at the same time, make synchronous grouting reinforcement to ensure the construction safety. In addition, they have deployed high-definition cameras at the front and back of the pearl river embankment and the liede bridge, and used boat patrols to monitor the river for anomalies to better monitor the river from multiple angles.

Guangzhou metro line 18 has a designed top speed of 160 km/h, which is the fastest high standard metro urban express in China. Line of about 62 km, bear the connected, white sand, guangzhou east station, radiation pazhou, guangzhou railway station, baiyun airport hub of the three important tasks, after opened, will implement the downtown guangzhou and nansha new city fast orbit transportation links, strong support of guangzhou "southern extension" strategy, promote the implementation of the strategy of nansha district country. In the future, guangzhou metro line 18 is expected to extend to zhuhai, zhongshan and qingyuan, becoming an important traffic artery for the construction of the guangdong-hong kong-macao greater bay area.