Drilling-into-pile techniques by the Short Spiral Drill
long spiral mixing pile
long-spiral-compacted-concrete pile
spiral-weld steel pipe pile
antiskid pile；anti-slide pile；counter-sliding pile
cast in place pile model pile
CFG pile(cement fly-ash gravel pile)
combination pile of big pipe pile
coordinate of pile by pile
distance between the anchor pile and the test pile
end-bearing pile and friction pile