involving penetration of the soil, e.g. vibroflotation

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Improving or preserving soil or rock, e.g. preserving permafrost soil (securing of slopes or inclines E02D17/20; damming or interrupting passage of underground water E02D19/12; improving soil for agricultural purposes A01; soil stabilisation for road building or like purposes E01C21/00, E01C23/10; setting rock anchoring bolts E21D) > Improving by compacting (E02D3/11 takes precedence; compacting soil locally before or while forming foundations E02D27/26, E02D27/28) > by tamping or vibrating, e.g. with auxiliary watering of the soil (E02D3/026, E02D3/08 take precedence; generating or transmitting mechanical vibrations for performing mechanical work in general B06B; tamping or vibrating apparatus for working ballast or railways E01B27/00, for consolidating paving materials E01C19/30, for consolidating concrete in general E04G21/06) > involving penetration of the soil, e.g. vibroflotation