Procedure and means for creating a vertical drain
OwnerMauno O. Juholainventor
Life of this patent
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Abstract
A procedure for creating a vertical drain by pushing into the ground an insertion tube (7) housing within itself a so-called prefabricated drain (9), by pulling out the insertion tube and cutting off the prefabricated drain. The prefabricated drain is cut off with a cross-cutting means located within the insertion tube (7) at such height, or in such a layer as for instance a sand stratum (3) which accepts the water conveyed by the prefabricated drain.
Claims5
A method of creating a vertical drain in a first layer of soil located below a second layer of soil, comprising:
- pushing into the first layer an insertion tube carrying therewithin a prefabricated drain and cross-cutting means located within said tube adjacent its lower end, securing the lower end of the drain in the soil, raising the insertion tube to a height such that said cross-cutting means is in a location in said second layer, actuating said cross-cutting means at said location to cut-off the lower end of said drain, and pulling out said insertion tube from said second layer.
An apparatus for installing a vertical drain in a first layer of soil located below a second layer of soil, comprising:
- an insertion tube for receiving therein a prefabricated drain, means for pushing said insertion tube into said first layer of soil, cross-cutting means located within said insertion tube adjacent its lower end, said cross-cutting means including a cutting blade movable transverse to the tube, and a counter blade located opposite said cutting blade.
Dependencies are inferred from the claim text.