Table 3.
Statistical comparison of theoretical and load-test capacities for Project 1.
| Method | Soil type | Cum. skin friction ( ) |
Skin friction, Qs ( ) |
End bearing, Qb ( ) |
Allowable capacity ( ) |
Difference with load test (666.9  ) |
Bias factor, λ = Pred/Test | Statistical summary |
|---|---|---|---|---|---|---|---|---|
| SPT-based BNBC 2020 | Clay | 71.82 | 203.1 | 861 | 371.4 | – 44.31% | 0.56 |
MAPE = 38.54%, Mean bias, λ̄ = 0.61 & COV = 0.31 |
| Sand | 131.28 | |||||||
| SPT-based Other | Clay | 399 | 530.3 | 836.4 | 581.3 | – 12.82% | 0.87 | |
| Sand | 131.31 | |||||||
| BCE BNBC 2020 | Clay | 197.35 | 223.37 | 537.27 | 277.0 | – 58.46% | 0.42 | |
| Sand | 26.02 |
Pred Predicted capacity, Test Actual capacity from load test.