Research Article
Displacement and Stress Characteristics of Tunnel Foundation in Collapsible Loess Ground Reinforced by Jet Grouting Columns
Table 1
Parameters used for numerical simulations [
52].
| | Types | Elastic modulus /MPa | Poisson’s ratio | Volumetric weight (kN/m3) | Cohesion (kPa) | Angle of internal friction (°) | Permeability coefficient (cm/s) |
| | Eolian loess (Q3eol) | 27 | 0.35 | 13.8 | 22 | 28 | 0.16 × 10−4 | | Alluvial loess-like soil (Q3al) | 60 | 0.3 | 15.2 | 27 | 30 | 0.11 × 10−4 | | Fine sand layer | 180 | 0.3 | 18 | 2 | 32 | 0.32 × 10−2 | | Concrete backfill | 120 | 0.2 | 19 | — | — | 0.1 × 10−4 | | Primary support | 23000 | 0.2 | 23 | — | — | 0.39 × 10−7 | | Secondary liner | 25000 | 0.2 | 25 | — | — | 0.13 × 10−8 | | Bolts | 200000 | 0.3 | 78.5 | — | — | — | | Vertical jet grouting piles | 1200 | 0.2 | 21 | — | — | — |
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