Assessment of Ultimate Bearing Capacity of Static Loading Pile Based on Cusp Catastrophe Theory

Table 3

State and ultimate bearing capacity of 10 cast-in-place piles at Jinqiao-Meiya and Jinqiao-Chunyu sites.

Pile number	Qu (JGJ 106-2014) (kN)	Qu (Proposed) (kN)	Rebound rate	Final stability	Mechanical state
87#	7,680	7,680	27.0%	Unstable	Plastic
147#	9,320	≥9,600	55.5%	Stable	Elastic–plastic
274#	9,270	≥9,600	61.8%	Stable	Elastic
399#	≥9,600	≥9,600	83.7%	Stable	Elastic
SZ1#	17,500	17,500	21.1%	Unstable	Failed
SZ5#	15,280	≥16,000	59.2%	Stable	Elastic–plastic
SZ6#	9,600	9,600	11.0%	Stable	Failed
SZ7#	14,710	≥16,000	55.8%	Stable	Elastic–plastic
SZ8#	14,930	≥16,000	43.2%	Stable	Elastic–plastic
SZ9#	≥16,000	≥16,000	45.2%	Stable	Elastic–plastic

Pile SZ6# was unstable under the load previous to the final load.