Research Article
The Influence of Water-Level Fluctuation on the Instability and Seepage Failure of Dump-Fill Cofferdam
Table 1
Basic physical and mechanical parameters of cofferdam, rock, and soil.
| | Cofferdam materials | Cohesion (kPa) | Angle of internal friction (°) | Coefficient of permeability (cm/s) | Natural gravity (kN/m3) | Saturated bulk weight (kN/m3) | Modulus of elasticity (kPa) | Poisson's ratio |
| | Outsourced soil | 21.23 | 10.03 | 6.63 × 10−5 | 18.40 | 19.30 | 10240 | 0.3 | | Fill material | 13.47 | 7.40 | 9.27 × 10−8 | 19.70 | 19.70 | 8820 | 0.3 | | Powdery clay | 20.00 | 13.00 | 7.0 × 10−5 | 18.80 | 20.00 | 8640 | 0.3 | | Medium sand | 0.00 | 28.00 | 1.0 × 10−3 | 18.00 | 19.00 | 12000 | 0.3 | | Round gravel | 0.00 | 35.00 | 1.0 × 10−2 | 18.60 | 19.60 | 36000 | 0.3 | | Impregnating wall | / | / | 5.0 × 10−9 | 22.00 | 23.00 | 300000 | 0.2 | | Strongly weathered rock | 100.00 | 35.00 | 1.0 × 10−4 | 20.00 | 21.00 | 300000 | 0.3 |
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