Survey and Investigation

Qingdao Metro Line 1

Located in the entrance of Jiaozhou Bay, the project connects Tuandao he Xuejia Island, showing a basically consistent direction with Jiaozhou Bay Tunnel. The shortest distance is only 145m while the longest distance is 245m. Therefore, the drilling must be précised. Meanwhile, Jiaozhou Bay is an international waterway that leads to great difficulty in construction.