Method and a device for introducing a tubular assembly into the soil
AssigneeIngenieursbureau A.P. van den Berg B.V.
InventorArie P. VAN DEN Berg
Life of this patent
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Abstract
A method and a device for introducing a tubular assembly into the soil, which assembly consists of two or more elongated strips with a curved cross-section, made of an elastically flexible material, which strips are unwound from corresponding drums and are being united at adjacent edges when being unwound, and are separated again when being rewound on said drums. The driving force is derived from the rotational movement of said drums. The assembly can be used for introducing drainage tape into the soil, for introducing a sounding probe into the soil, for cutting soil samples and for similar purposes.
Claims21
The method of driving a tube into the soil and pulling the tube from the soil comprising the steps of,
- forming a tube from a plurality of strips of longitudinally flexible material each of which strips is separately coiled and is characterized by assuming a bowed cross section when relaxed and has substantial rigidity when under tension or compression and its longitudinal edges restrained,
- releasably connecting the adjacent edges of said strips,
- forcing the tube through a rigid guide to the soil by application of axial force on the tube,
- the soil serving to laterally support the tube below grade,
- and withdrawing the tube from the soil while disconnecting the edges of the strips and winding the strips back on their respective coils.
Apparatus for forming a tubular assembly and driving the assembly into soil, comprising.
- a frame
- a plurality of separate coils mounted on the frame and each being a strip material having a bowed cross-section when unrestrained and which can be coiled flat and which is substantially rigid when under tension or compression with its longitudinal edges restrained,
- guide means mounted on the frame for movement to a position engaging the soil,
- means for driving the strips from each coil through said guide means to position the material to form a tubular assembly,
- means for interconnecting the adjacent longitudinal edges of the strips to form a tubular assembly,
- said driving means applying axial force to the strips and the tubular assembly,
- said guide means restraining the tubular assembly against buckling above grade and the soil acting to prevent buckling of the assembly below grade, and
- means for winding the strips back onto the coils.
Dependencies are inferred from the claim text.