Qingdao Metro's first soil pressure and small mud water dual mode shield machine successfully rolled off the assembly line

Recently, Qingdao Metro's first soil pressure and small mud water dual-mode shield machine "China Railway 1348" successfully passed the offline acceptance.

The "China Railway 1348" soil pressure and small mud and water dual-mode shield machine will be used for the first shield section tunnel of Qingdao Metro Line 6 phase II, the equipment excavation diameter of 6.5 meters, the total length of about 109 meters, the total weight of about 500 tons, the maximum propulsion speed of 80 mm per minute, the maximum thrust of 3700 tons, can be easily operated. Two modes of soil pressure and mud film retaining pressure driving can be converted quickly.

It is reported that the geological conditions of the two sections of the project are complex. In order to solve the problems of rich water, soft and hard composite strata on the upper side and ground settlement that is not easy to control, the design and development team of China Railway Equipment Group Tianjin Company tailor-made shield equipment for the construction section. The conversion of the two modes of earth pressure and mud film pressure holding tunneling can meet the complex construction environment of the tunnel through the Haihe river, the power tunnel, and the side through the high voltage tower, and has good formation adaptability, which is also another successful exploration of the new technology and new construction method of the shield tunneling machine in China.