Research on the design method for uniform wear of shield cutters in sand–pebble strata

Highlights

• A uniform wear design method of all cutters on the cutterhead for shield tunneling in sandy–pebble stratum was established, that is, the uniform wear of all the cutters can be achieved by installing a certain number of cutters on different trajectory radii of the cutterhead and designing the curved spoke with a certain arch height.

• Based on Beijing Metro Line 19, an engineering discrete element method simulation model of shield tunneling in sandy–pebble stratum was established to study the cutters’ wear combined with engineering observations, and the rationality of the uniform wear design method was verified by comparing with the original engineering scheme.

• The long-distance shield driving was predicted by the Japanese Tunnelling Society model, and the calculation result of the uniform wear scheme was 47% higher than that of the engineering scheme, which showed the superiority of the uniform wear design method.

Keywords

cutter wear / EDEM model / long-distance shield driving / sand–pebble stratum / shield tunnel / uniform wear design method

RIGHTS & PERMISSIONS

2023 2023 The Authors. Deep Underground Science and Engineering published by John Wiley & Sons Australia, Ltd on behalf of China University of Mining and Technology.