First

a new pile type-prestressed concrete solid pile with snap-in mechanical connection was introduced in this paper.Then

numerical simulation was carried out to analyze some casual factors

unconsidered in previous experiments

on the mechanical behavior of cap-pile joints

including stirrup ratio

steel reinforcement ratio

and effective prestress.Results showed that stirrup spacing had limited influence on the horizontal maximum bearing capacity of nodes.However

a smaller stirrup spacing imposed a greater constraint on the concrete

and also resulted in a gentler decline curve of horizontal bearing capacity.For a larger stirrup spacing

the decline curve of horizontal bearing capacity would be steeper.The following results were also obtained:（1）increasing the effective prestress increased the horizontal bearing capacity of nodes;（2）a higher effective prestress corresponded to greater damage to the pile body

while a lower effective prestress to the pile caps;（3）the ductility and horizontal bearing capacity were improved by using steel reinforcements;and（4）the use of large-diameter steel bars improved the anchorage performance of nodes

causing more damage to the pile body.The simulation results should provide a reliable basis for improvement and application of this type of pile.