Patent ID: 6234719
Filing Date: 2001-05-22
Classification: E02D,E21B

Abstract:
A method for making a tubular foundation comprising the steps of:drilling a substantially vertical bore hole in soil stratum in ground by a drilling and piling rig comprising a bit and a drilling hammer and being disposed on a pivotable support arm mounted on a motor vehicle, said bit being attached to a lower end of said drilling hammer;lowering said tubular foundation into said vertical bore hole;removing said drilling and piling rig from said substantially vertical bore hole, taking temporarily a position away from an upward imaginary extension of the bore hole;lowering a pile down into said substantially verticle bore hole until a lower end comes to rest against the bottom of said substantially vertical bore hole;placing a chisel collar on said bit, said chisel collar has a coaxial guide pin for cooperation with an upper end of said pile; andramming said pile deeper down into the ground by said drilling and piling rig using said drilling hammer,wherein said ramming step is performed without rotation.