The tunnel of the first section of Guangzhou Line 18 has been completed

Recently, Guangzhou Metro Line 18, under construction, has welcomed the construction of a major project node, with the smooth completion of the underground tunnel between Modiesha and Xian Village, marking the completion of the first section of Line 18 (Wanqingsha to Xian Village) tunnel.

According to the introduction, the first section of Metro Line 18 starts from Wanqingsha Town in Nansha District in the south, runs north-south through Nansha District, Panyu District and Haizhu District, and reaches Xian Village in Tianhe District, with a total length of 58.3 kilometers, which is an underground line.

The first section of the whole line is divided into 21 shield sections. Large diameter shield machines with a diameter of 8.8 meters are used for tunneling. A total of 42 shield machines are put into the construction operation. Due to line interval geological structure is complex, shield construction successively, 11 times in river system, nine times under the existing subway lines, construction difficulty and risk control pressure is very big, the construction, the subway builders construction technique innovation research, auxiliary air pressure is applied by the positive, "advance grouting + pneumatic auxiliary", It can effectively solve various problems such as mud cake, gushing, excavation of upper soft and lower hard strata to ensure excavation efficiency, and apply new technologies such as two-dimensional micro-motion and geological radar scanning to resolve construction risks in complex geological conditions in advance.

Up to now, 95% of the civil works of the first section of Metro Line 18 have been completed. 8 stations have been roofed, station decoration and mechanical and electrical installation construction; 7 sections have been fully connected, track, power supply and other professional construction. Wanqing sand depot, long pillow parking lot for mechanical and electrical installation construction.