Optimization Method for Irregular Piled Raft Foundation on Layered Soil Media

Table 9

Comparison of settlements and stresses on top of piles between different schemes.

Model	Diff. settlement (m)	Diff. stress (MPa)	Average settlement (m)	Average stress (MPa)
Initial design	0.014	2.4	0.043	−6
Different diameters (F)	0.005 (64%)	0.8 (67%)	0.042 (2%)	−5.8 (3%)
Different spacing (F)	0.005 (64%)	0.9 (63%)	0.042 (2%)	−5.7 (4%)

Note. “Diff.” is short for differential.