Patent ID: 7455480
Filing Date: 2008-11-25
Classification: E02D,E21B

Abstract:
1. Method for the construction of drainage works to stabilize ground which is unstable and/or liable to landslides, for the drainage of percolates in contaminated areas, to increase the uptake capacity of groundwater to be conveyed to aqueducts, or as a drilling system for the injection of grout and other mixtures for the purpose of consolidation with the jet-grouting or conventional grouting technique, the method comprising the steps of: constructing a shaft in a position which the ground is stable; inserting an automated drilling unit ( drilling and inserting one or more drainage pipes ( pick-up of a drilling rod ( drilling the concrete shaft wall by core boring; pick-up of a rod fitted with a disposable bit ( rotating and simultaneous advancing of the head, with drilling of the soil and pressurised insertion of the preventer in the concrete wall of the shaft; pick-up of a second rod ( repetition of the last stage until the required depth is reached; and returning the machine to the starting position for loading of a new set of rods into the magazine, and advance of the machine to the point at which the next drainage pipe is to be inserted.