The pile-soil shear modes have significant influences on the displacement of pile-soil shear and the development of pile side resistance. Field experiments and long-term monitoring were carried out to study shear properties of six bored piles under three modes: bearing pile type

uplift pile type and negative friction pile type. The curve of side resistance versus displacement was established by systematically analyzing the pile strain

displacement of the top pile

and pile-soil layered subsidence of different pile types. The established curve was further used to determine the displacement of pile-soil shear in different modes and the ultimate lateral resistance at different depths. According to the characteristics of the ultimate lateral resistance in different modes

its five influence factors were analyzed

including the relative motion direction of pile-soil

shearing boundary constraint

shear displacement

loading rate and shear duration. Meanwhile

we discussed the feasibility of using the in situ testing results of uplift pile to predict the ultimate lateral resistance of negative friction pile in the increasing stage. This study provides useful references for similar projects.