EXPERIMENTAL STUDY ON PRECAST SELF-DRAINING PILE

The design guiding ideology of precast self-draining pile was proposed，and the pile-sinking drainage effectof precast self-draining pile was examined through the indoor test and field test，and then the pile body bearingcapacity and vertical bearing capacity of a single pile of precast self-draining pile were experimentally studied． Theresults showed that as compared with an ordinary square pile，precast self-draining pile had good drainage properties，and its pile-side sand channel could play the role in vertical offset well，especially the precast self-draining pile withthe ＜ -shaped side channel． At the same time，from the perspective of pile body bearing capacity and its liftingsecurity，precast self-draining pile could meet the operating requirements better using side channel and angular pointto control protective layer． The vertical bearing capacity of a single pile of precast self-draining pile was slightlyhigher than that of the ordinary square pile，due to the faster consolidation speed of the soil around the pile．