Optimization Method of Reducing the Differential Settlements of Piled Raft Foundations Based on Pile-to-Pile Interaction Theory

Table 5

Empirical parameters of the soil used in equation (13).

Soil layer i	Soil types	qsik (kPa)	qpk (MPa)			li (m)
						Test pile	Simulated piles
1	Fine sand	70	—	(0.8/1.5)^1/3	(0.8/1.5)^1/3	9	3
2	Medium-coarse gravel	110	—	(0.8/1.5)^1/3	(0.8/1.5)^1/3	12	2
3	Medium-coarse sand	100	2.1	(0.8/1.5)^1/3	(0.8/1.5)^1/3	9	11
4	Medium-coarse gravel	120	2.2	(0.8/1.5)^1/3	(0.8/1.5)^1/3	10	6
5	Fine sand	80	1.5	(0.8/1.5)^1/3	(0.8/1.5)^1/3	16	13
6	Medium-coarse gravel	120	2.6	(0.8/1.5)^1/3	(0.8/1.5)^1/3	—	2

Note. The tip resistances (q_pk) of the soil take the lower limit of the given range in the Chinese code [35].