| 摘要 |
<p>A rotating column (10) equipped with nozzles (11, 13) at its lower end and having a reduced diameter as compared with that of the pillar to be built, sends, as it penetrates the ground, a powerful pressurized fluid jet (16); in this way a wide cavity is formed, which is filled during the same excavation with selected aggregates; finally a binding mixture is injected as the excavating tool is extracted. </p> |
