Research Article
Research on the Prediction Model of Shield Advancement Rate in Sandy Cobble Ground of Beijing
Table 2
Physical and mechanical indicators of main crossing soil layer in test section.
| | Soil layer | Buried (m) | γ (kN/m³) | c (kPa) | φ (°) | K0 |
| | Plain fill ①1 | 0.70 | 18.00 | 0.00 | 10.00 | 0.00 | | Silt-fine sand ②3 | 3.80 | 19.00 | 0.00 | 20.00 | 0.40 | | Silt ② | 1.50 | 19.30 | 10.00 | 20.00 | 0.35 | | Silt-fine sand ②3 | 6.10 | 19.00 | 0.00 | 20.00 | 0.40 | | Silt ③ | 4.80 | 19.80 | 22.00 | 21.90 | 0.34 | | Fine sand-sand ④3 | 10.70 | 20.30 | 0.00 | 28.00 | 0.35 | | Medium sand-fine sand ④2 | 7.40 | 20.50 | 0.00 | 32.00 | 0.33 | | Boulders-pebbles ⑤ | 14.60 | 21.00 | 0.00 | 36.00 | 0.28 | | Pebble-round gravel ⑦ | 16.60 | 21.20 | 0.00 | 38.00 | 0.26 |
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