| 摘要 |
A grouting apparatus comprises a perforated tube assembly (4) insertable into earth and a grout injection feed system receivable in a cavity of the perforated tube assembly, the grout feed system comprising a grout injection head (12) connected to an expansible conduit (11) for feeding grout to the injection head, whereby the expansible conduit is adapted to expand sufficiently within the perforated tube assembly to block the cavity of the tube assembly above the grout injection head at a grout injection pressure. |
