Reliability Assessment on Pile Foundation Bearing Capacity Based on the First Four Moments in High-Order Moment Method

Table 3

Probability model and statistical parameters of basic random variables.

Random variance	Probability distribution	Mean	COV (%)
Ultimate lateral resistance of miscellaneous fill, qs1	Normal	22 (kPa)	30
Ultimate lateral resistance of gravel with cohesive soil, qs2	Normal	100 (kPa)	30
Ultimate lateral resistance of strongly-weathered granite, qs3	Normal	120 (kPa)	30
Ultimate tip resistance of strongly-weathered granite, qp	Lognormal	1,800 (kPa)	30
Vertical loads on tip of the pile of no. 6, Fk6	Lognormal	3,200 (kN)	7
Vertical loads on tip of the pile of no. 9, Fk9	Lognormal	4,600 (kN)	7
Vertical loads on tip of the pile of no. 87, Fk87	Lognormal	1,750 (kN)	7
Vertical loads on tip of the pile of no. 156, Fk156	Lognormal	4,000 (kN)	7
Weight of bearing platform and soil,	Lognormal	30 (kN)	2