Research conclusions: It is known by comparison that the maximum settlement of cover plate occurs in the circular pile，followed by the square and Y － section piles; the settlement of soil between piles for circular pile is largest，while that for square pile firstly greater and then less than Y － section pile; the different settlement between cover plate and inter － pile soil for circular pile is of maximum，followed by Y － section and square piles; the pile － top and pile － end average stress for square pile is greater than circular and Y － section piles in turn．