DRILLING COLUMN FOR JET-GROUTING AND MONITOR OF SAID DRILLING COLUMN

摘要

The present invention relates to a Drilling column (1), in particular for jet-grouting, comprising one or more rods (2), coupled each other in series, each one of said rods (2) being hollow such that, when said rods are coupled each other, they form a channel (C) for the passage of a cement mixture, a monitor (3), fixed to one end of said rods series (2), said monitor laterally comprising at least one nozzle (32), through which said cement mixture can outflow, and a chisel (4), for drilling the ground, fixed to said monitor (3), said drilling column (1) being characterized in that said monitor (3) internally comprises a slider (33), having a detection surface (331'), on which said cement mixture interferes, when passed through said channel (C) formed by said rods (2), before outflowing from said at least one nozzle (32), and in that it comprises a measuring device (6) for the measurement of the mechanical stress on said slider (33) caused by the pressure exerted on said detection surface (331') from said cement mixture. The present invention also relates to a monitor (3) for a drilling column (1), in particular for jet-grouting.