Composite pile

The utility model discloses a composite pile, composite pile includes that precast pile core and parcel are in the outer calculus body of precast pile core, precast pile core form by a plurality of precast pile piggy -back connectors and stake end, the pile bolck of precast pile core and piggy -back connector department all are provided with the rigid connection board, and the precast pile has bigcross -section end, and the end graduallys change to the small bore end and reduces and the stake cross sectional area of precast pile is along the axis from big cross -section with the small bore end. The utility model discloses a composite pile structure is favorable to precast pile and inseparable bonding of the calculus body to form whole and prevent that the two contact surface from sliding,can also enlarge effective footpath, and bearing capacity of the single pile increases for ordinary precast pile by a wide margin, in addition, can pass through experimental estimation bearing capacity of the single pile thro