Table 4 Stratum redefinition results of the tunnel project from Qian-Zhuang to Ke-Ning Road.
From: A multistage model for rapid identification of geological features in shield tunnelling
Redefined stratum | Ordinary stratum number | Ordinary stratum name |
---|---|---|
1 | K2c-2 | Strong-weathered argillaceous siltstone |
K2c-3 | Medium-weathered argillaceous siltstone | |
2 | â‘¡-1c-d2-3 | Sandy silt |
â‘¡-2c-d2-3 | Sandy silt | |
â‘¢-2c-d2-3 | Sandy silt | |
â‘¢-3d-c1-2 | Sandy silt | |
â‘¢-4e | Sandy gravel soil | |
3 | â‘¡-1b2-3 | Silty clay |
â‘¡-2b4 | Muddy silty clay | |
â‘¡-3b2-3 | Silty clay | |
â‘¢-2b2-3 | Silty clay | |
â‘¢-3b1-2 | Silty clay | |
â‘¢-1b1-2 | Silty clay |