Recently, the China Railway 18th Bureau Consortium successfully won the bid to expand the EPC general contracting project for the design, procurement and construction of the southern section of the South-North Line Project of the follow-up west channel of the Hangjia South Row, marking the first deep tunnel drainage project implemented in China and the largest diameter double-shield TBM in China The construction project officially landed.

The first deep tunnel drainage project in China

According to reports, the EPC general contracting project for the design, procurement and construction of the southern section of the south-north line project of the follow-up west channel of the Hangjia South Row is located in Yuhang District and Xihu District of Hangzhou City. Water intake and connecting tunnel engineering, river channel compensation engineering, environmental protection, water and soil conservation engineering, pipeline relocation engineering, etc.

Among them, the construction content of China Railway 18th Bureau mainly includes: the depth of the Gujiaqiao Port water intake shaft is 62 meters, and the diameter after lining is 22 meters; the tunnel is 12.28 kilometers, of which the mechanical method excavates the stepping hole 0.15 kilometers, and the construction length of the double shield TBM method 12.13 kilometers, the excavation diameter of this TBM is 12.5 meters, which is the professional double-shield TBM equipment with the largest designed excavation section and the deepest excavation depth in domestic drainage projects. The innovative design of this project adopts TBM deep well assembly stepping, continuous belt conveyor and vertical belt conveyor for muck transportation.

Project diagram

At present, this project has been included in Zhejiang Province's thousands of trillion projects. It is one of the backbone projects to improve the layout of the Qiantang River in the south of the Taihu Lake Basin and improve the flood control and disaster reduction capabilities of the Hangjiahu Plain. It is a major livelihood project to ensure the safety of flood control and drainage in the west of Hangzhou. , The project is currently the deep tunnel drainage system project with the largest drainage scale, the largest diameter and the largest buried depth in China. After the project is fully completed, it will play a major role in improving the regional water environment and preventing urban waterlogging.

As the only water conservancy and hydropower super-qualified enterprise outside the domestic hydropower system, China Railway 18th Bureau gives full play to its unique advantages in the field of water conservancy and hydropower, the advantages of the entire industrial chain and its own integration of investment, construction and operation, and continues to provide high-quality railway construction solutions for local economic and social development. . The successful implementation of this project has created a new situation for China Railway Construction to participate in the construction of large-scale flood control and drainage projects in Zhejiang Province, further enriched the performance of China Railway 18th Bureau in the construction of long-distance TBM water diversion tunnels, and effectively improved the group's water conservancy market in Zhejiang Province influence. Editor/He Yuting