Open-type TBM produced by CRCHI creates a new record in China

Project: Transferring water from Songhua river into central Jilin province
Location: Yongji County, Jilin City, Jilin Province, China
Customer: China Railway 18 Bureau Group Company

Open-type TBM produced by CRCHI

Project overview
Being the longest water delivery line in the history of Jilin province, transferring water from Songhua River into Central Jilin Province will transfer the largest capacity of water and cover the largest areas. The water diversion line is 371.54 km long and the total period of construction is 6 years. An open-type TBM produced by CRCHI is used to excavate a tunnel from the Fengman Reservoir to the left bank of Wende River.

The tunnel is 19797 meters long. The first construction phase is 8298 meters and the second construction phase is 11499 meters. The tunnel slope is 1/4300. The maximum depth is 536.8 meters.

Open-type TBM produced by CRCHI

Among the surrounding rocks, II surrounding rock accounts for 32.8%, III surrounding rock accounts for 56%, IV and V surrounding rock accounts for 11.2%. Tuff and granite are the main rocks. Compressive strength was measured to be within 74-169 MPa initially, while the maximum compressive strength during the construction reached 200 MPa.

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NBM&CW June 2020

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