Method and device for in-situ utilization of TBM rock ballast in tunnel

• Main Authors: FAN JIANSHENG, LI CHAOYI, ZHOU JUNBO, QIN PENGXIANG, PAN CHANGCHENG, ZHOU HU, NIE JIANGUO, JIN FENG
• Format: Patent
• Language: Chinese; English
• Published: 03.12.2021
• Subjects: EARTH DRILLING; FIXED CONSTRUCTIONS; GALLERIES; LARGE UNDERGROUND CHAMBERS; MINING; SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, ORDRAINING IN OR OF MINES OR TUNNELS; SHAFTS; TUNNELS

The invention discloses a method and device for in-situ utilization of TBM rock ballast in a tunnel. The method comprises the steps that rock ballast during excavation of a TBM is collected, rock ballast with the particle size larger than a preset particle size is screened out, the screened rock ballast is stored in an in-tunnel stock bin, and the residual rock ballast is transported out of the tunnel; in the excavation and tunneling process, a lining formwork is synchronously installed behind a main machine of the TBM, a stone conveyor is used to backfill the rock ballast in the stock bin into a gap between the surrounding rock and the lining formwork, and a rock block framework for supporting the surrounding rock is formed; and the residual rock ballast is screened into coarse aggregate, fine aggregate and stone powder admixture according to the particle size to serve as a concrete raw material to prepare tunnel ballast self-compacting concrete, the tunnel ballast self-compacting concrete is pumped into a l