CREG’s φ10.9m Slurry TBM was launched for Beijing-Shenyang High Speed Railway Wangjing Tunnel on March 16, 2017 in Chaoyang District, Beijing.
The project contracted by CRTG has the deepest excavation trench in Beijing. The Slurry TBM is to drive beneath the Airport Expressway, high speed road and several residential areas on its way. Moreover, the tunnel either crosses or runs in parallel to such important urban facilities as electricity, communication, sewage water, gas, and oil pipelines. The complicated geotechnical conditions makes the Wangjing tunnel a critical part of the overall Beijing-Shenyang High Speed Railway Project and for that reason, CREG’s TBM is required to negotiate a series of demanding jobs. For example, the machine has to run for 3,680m continuously due to the absence of maintenance stops in between. That means each system and component of the machine must be fairly enduring and reliable. The overburden at the launching section is only 10.5m, smaller than the diameter of the machine itself. The anticipated stagnant water at the receiving end adds more difficulty to the machine operation.
Beijing-Shenyang High Speed Railway Project is around 700km and shall significantly enhance the connection between Beijing and Shenyang once completed.