Test No. | Tunnel depth, H: m | |
---|---|---|
1 | Pile length, Lp = 18 m Pile diameter, d= 0.8 m | 15 |
2 | EI= 1400 MN m2 Tunnel diameter, D= 6 m Stiff kaolin clay, ~75 kPa | 18 |
3 | 21 |
Single pile | Pile group (3×3) | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
C/D | 0.16 | 0.16 | 0.16 | 0.16 | 0.16 | 0.16 | 0.16 | 0.16 | 0.16 | 0.16 |
E/D | 0 | 0.5 | 1.0 | 1.5 | 2.0 | 0 | 0.5 | 1.0 | 1.5 | 2.0 |
Soil Parameters HS model | ||
---|---|---|
Parameters | values | units |
Friction angle, φ | 35 | |
Dilatancy angle, Ψ | 5 | |
Cohesion, c | 10 | [kN/m2] |
Secant stiffness in the standard drained triaxial test, | 35000 | [kN/m2] |
Tangent stiffness for primary oedometer loading, | 35000 | [kN/m2] |
Unloading and reloading stiffness, | 100000 | [kN/m2] |
Reference pressure, pref | 100 | [kN/m2] |
Power for stress-level dependency of stiffness, m | 0.7 | [-] |
Failure ratio, Rf | 0.9 | [-] |
Poisson’s ratio for unloading-reloading,Ѵur | 0.2 | [-] |
Soil weight above phreatic level, γunsat | 17 | [kN/m3] |
Soil weight below phreatic level, γsat | 20 | [kN/m3] |
Strength reduction factor for interfaces in | 0.6 | [-] |
PLAXIS, Rinter |
Soil type | φ (degree) | c (kN/m2) |
---|---|---|
1* | 35 | 10 |
2 | 37 | 0 |
*Soil 1 has the same parameters as the soil used in ( |
Parameters | Values | Units | Model | |||
---|---|---|---|---|---|---|
Pile | Pile cap | Tunnel lining | TBM shield | |||
Diameter (D) | 1 | - | - | - | m | Linear |
Thickness (t) | - | 1 | 0.25 | 0.35 | m | elastic |
Elasticity modulus (E) | 30×106 | 30×106 | 30×106 | 210×106 | ||
Unit weight (γ) | 25 | 25 | 25 | 38 | ||
Possion’s ratio (ѵ) | 0.2 | 0.2 | 0.2 | 0.3 | - |