Table 3 Geotechnical parameters used in the coupled numerical model
From: Integrated method for fragility assessment of railway embankments under rainfall-induced landslides
Category | Parameter | Silty sand | Clayey sand | Bedrock | |
|---|---|---|---|---|---|
Groundwater model | \(K_{s} \)(m/s) | 3.639 × 10–6 | 7.222 × 10–7 | 4.977 × 10–6 | |
\(\theta_{s}\) | 0.39 | 0.41 | 0.40 | ||
\(\theta_{r}\) | 0.1000 | 0.0010 | – | ||
\(\alpha \)(kPa−1) | 0.6014 | 1.1940 | – | ||
\(n\) | 1.4800 | 1.3100 | – | ||
Slope stability model | Unit weight (kPa) | Mean | 18 | 16 | – |
COV | 0.1 | – | – | ||
Friction angle (°) | Mean | 27 | 25 | – | |
COV | 0.05 | – | – | ||
Effective cohesion (kPa) | Mean | 3 | 5 | – | |
COV | 0.33 | – | – | ||