Research Article
Monitoring and Analysis of Ground Settlement Induced by Tunnelling with Slurry Pressure-Balanced Tunnel Boring Machine
Table 1
Geotechnical design parameters of the ground.
| | Ground type | Unit weight (kN/m3) | NSPT (down-track) | NSPT (up-track) | Young’s modulus (MPa) | Friction angle (°) | Ko | Permeability, k (m/sec) |
| | Fill | 19 | <10 | <10 | 1.5 × NSPT | 35 | 0.4 | 1 × 10−7 to 4 × 10−4 | | Alluvium | 19 | 30∼35 | 24∼30 | 35 | 0.4 | 1 × 10−8 to 4 × 10−5 | | CDG | 19 | 40∼60 | 35∼41 | 35 | 0.4 | 1 × 10−7 to 4 × 10−5 | | HDG | 19 | 200 | 300 | 40 | 0.4 | | MDG | 22 | UCS = 30∼200 MPa | >1,000 | 45 | 0.4 | 1 × 10−7 |
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UCS: unconfined compressive strength. |
