Research Article
Determination of the Installation Time of Secondary Liner during Excavation of Large Cross-Section Double-Arch Tunnels
| | Stratum | H (m) | Ρ (g/cm3) | K (cm/s) | E (MPa) | K0 (-) | C (kPa) | Φ (°) | µ (-) |
| | 1 | 2.0 | 1.95 | 2.31 e − 2 | 24.3 | 0.50 | 10.0 | 27.0 | 0.30 | | 2 B | 9.0 | 2.00 | 5.79 e − 3 | 9.1 | 0.55 | 20.0 | 27.4 | 0.30 | | 2 A | | 2.21 | 1.38 e − 5 | 13.0 | 0.60 | 28.2 | 31.2 | 0.24 | | 5–1 B | 4.0 | 2.64 | 9.26 e − 3 | 3.3 e3 | 0.58 | 3.4 e4 | 35.0 | 0.27 | | 5–1 A | | 2.69 | 5.56 e − 5 | 4.9 e3 | 0.63 | 3.7 e4 | 38.6 | 0.24 | | 5–2 B | 3.6 | 2.68 | 2.36 e − 4 | 8.7 e3 | 0.64 | 4.1 e4 | 39.3 | 0.25 | | 5–2 A | | 2.70 | 3.81 e − 5 | 1.2 e4 | 0.68 | 4.5 e4 | 42.7 | 0.23 | | 5–3 | 41.4 | 2.71 | 1.16 e − 5 | 4.4 e4 | 1.00 | 5.5 e4 | 51.8 | 0.23 |
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h: thickness; ρ: density; K: permeability coefficient; E: elastic modulus; K0: at-rest earth pressure coefficient; c: cohesion; φ: frictional angle; μ: Poisson’s ratio; B: before grouting; and A: after grouting.
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