Research Article
Tunnel Probabilistic Structural Analysis Using the FORM
Table 1
Properties of the circular tunnel.
| Deterministic parameters | Probabilistic parameters | Parameter | Value | Parameter | Distribution |
| | 0°, 0° | /° | Normal (μ = 30, σ = 5) | | 2.5 m | /° | Normal (μ = 25, σ = 3) | | 0 KPa | /° | Normal (μ = 55, σ = 7) | | 2.7 | /° | Normal (μ = 110, σ = 5) | | 0 | /° | Normal (μ = 70, σ = 4) | Support | No support | /° | Normal (μ = 240, σ = 7) | /KPa | Truncated normal (μ = 20, σ = 11) ≥0 | /° | Log-normal (μ = 30, CoV = 0.07) | Ten/KPa | Uniform (0–8) |
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: dip of th joint set; : dip direction of th joint set.
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