A Calculation Method of Bearing Capacity of Single Squeezed Branch Pile Based on Load Transfer Method

Table 2

Suggested value of the friction angle of pile-soil interface δ.

Working conditions	δ (°)	Data provider
Pipe piles in dense sand	29.4	Neill [24]
Concrete piles in muddy soil or clay	21.3 to 31.6	Liu [25]
Driven piles in sand	28.0 to 30.0	Jardine [26]