| 摘要 |
<p>The invention relates to an installation to be used with a device for treating the ground using rotating jet(s) comprising a string of tubes (2) at the base of which is mounted at least one ejection nozzle, this nozzle being supplied with substance to be ejected by means of the string of tubes (2) or of flexible pipes (hoses) (3a, 3b), characterised in that it comprises an enclosure (chamber) (4), provided with at least one orifice (6, 7, 8) fitted with a seal (9, 10, 11) for the passage of the string of tubes and/or of the flexible pipes; a shut-off valve (12) making it possible to close off the borehole, and a pipe (13) for evacuating the substances leaving the borehole, this pipe being coupled up to the said enclosure and provided with an adjustable valve (14) making it possible to alter the flowrate of the said substances. <IMAGE></p> |
