초록 ▼

A method in or relating to piling of e.g. tubular bases which are placed and, possibly, casted within a hole drilled out in earth mass in ground or the like is described. One uses a generally known drilling rig, in which a bit is assigned a drilling hammer, and drills a hold having a depth approxima

A method in or relating to piling of e.g. tubular bases which are placed and, possibly, casted within a hole drilled out in earth mass in ground or the like is described. One uses a generally known drilling rig, in which a bit is assigned a drilling hammer, and drills a hold having a depth approximately corresponding to the base pipe. If there exists a need for piling, the drill string is swung aside, away from the hole, after having been pulled up, and one or, possibly, a plurality of piles is/are rammed down with a starting point at the bottom level of the bore hole. In order to drive the pile(s) down, the drilling hammer of the drilling rig is used.

대표청구항 ▼

[ What is claimed is:] [1.]1. 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 ve

[ What is claimed is:] [1.]1. 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.