Date: June 2022

Location: Qingdao, Shandong Province

Equipment: Tangxing RPB 4200*6900mm rectangular pipe jacking machine

Type: rail transit

Geology: silty, clay, complex geology

Significance: Qingdao Metro Line 4, as one of the major projects in Shandong Province in 2022, will play an important role in the city's rail transit network. The completion of Qingdao Metro Line 4 will greatly ease the traffic congestion in the main urban area and improve the functional quality of Qingdao.