Research Article
Deformation Characteristics and Safety Evaluation of the Throw Filling Soft Clay Cofferdam under Super-Historical Flood Conditions
Table 1
Properties of soils/rocks of the cofferdam and foundation.
| | Cofferdam material | Cohesion (kPa) | Internal friction angle (°) | Permeability coefficient (cm·s−1) | Natural bulk density (kN·m−3) | Saturated bulk density (kN·m−3) | Elastic modulus (kPa) | Poisson’s ratio | Thickness (m) |
| | Outsourcing soil | 34.1 | 13.4 | 6.17 × 10−5 | 18.40 | 19.30 | 11260 | 0.30 | 6.0∼8.0 | | Outsourcing soil soaked in flood (upstream face) | 30.1 | 13.4 | 6.17 × 10−5 | 18.40 | 19.30 | 11260 | 0.30 | 6.0∼8.0 | | Open channel backfill (upstream face) | 19.0 | 9.0 | 6.17 × 10−5 | 18.00 | 18.30 | 10580 | 0.35 | 13.0∼15.0 | | Open channel backfill (downstream face) | 12.5 | 7.0 | 6.17 × 10−5 | 18.00 | 18.30 | 10580 | 0.35 | 13.0∼15.0 | | Silty clay | 20.0 | 13.0 | 7.0 × 10−5 | 18.80 | 20.00 | 8840 | 0.30 | 1.5 | | Medium sand | 0.0 | 28.0 | 1.0 × 10−3 | 18.00 | 19.00 | 12000 | 0.30 | 0.5 | | Strongly weathered argillaceous siltstone | 100.0 | 35.0 | 1.0 × 10−4 | 20.00 | 21.00 | 300000 | 0.30 | — | | Impermeable wall | — | — | 5.0 × 10−6 | 22.00 | 23.00 | 300000 | 0.20 | — |
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