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US 3,992,890 AGranted
Method of forming foundations
AssigneePynford Limited
InventorDavid S. Pryke
Life of this patent
Estimating the term…
Abstract
The invention is concerned with a method of constructing or stabilizing an open site foundation wherein a series of slender piles each having a width of no more than 100mm. are driven into the ground and the tops of the piles are united with a thin concrete slab.
Claims12
A method of constructing an open site foundation in clay, comprising the steps of:
- providing a plurality of slender piles each having a width in the range of 25 to 100 mm.;
- pre-boring a starter hole for each pile of a size larger than the pile;
- inserting a pile through each hole and into the clay until a predetermined reaction is obtained;
- filling the holes with a fluent material which gives under movement of the clay to prevent lateral pressures on the piles;
- and
- thereafter uniting the tops of the piles with a thin concrete slab.
3 more elements
A method of constructing an open site foundation in clay, comprising the steps of:
- forming a thin concrete slab with a plurality of closely spaced tubular holes extending downwardly therethrough;
- providing a plurality of slender piles each having a width in the range of 25 to 100 mm.;
- pre-boring a starter hole for each pile of a size larger than the pile;
- positioning a jacking unit adjacent one of the tubular holes and anchoring the unit to the concrete slab
- inserting a pile through said one tubular hole;
- jacking the pile into the ground until a pre-determined reaction is reached;
- repositioning the jacking unit and jacking succesive closely spaced piles until a desired number of piles have been jacked;
- and
- filling the tubular holes in the concrete slab with a grout to unite the tops of the piles with the slab, while leaving the upper portions of the piles, beneath the slab, in an unsupported condition.
6 more elements
A method of constructing an open site foundation in clay, comprising the steps of:
- providing a plurality of slender piles each made of concrete and each having a width in the range of 25 to 65 mm.;
- pre-boring a plurality of closely spaced starter holes, one for each pile, of a size larger than the pile;
- inserting a pile through each hole and into the clay until a predetermined reaction is obtained;
- and
- uniting the tops of the piles with a thin concrete slab while leaving the pre-bored holes void, and leaving the upper portion of the concrete piles below the slab laterally unsupported.
2 more elements
A method of constructing an open site foundation in clay, comprising the steps of:
- providing a plurality of slender piles each having a width in the range of 25 to 100 mm.;
- pre-boring a starter hole for each pile of a size larger than the pile;
- inserting a pile through each hole and into the clay until a predetermined reaction is obtained;
- filling the holes with a crushable material which gives under movement of the soil to prevent lateral pressures on the piles;
- and
- thereafter uniting the tops of the piles with a thin concrete slab.
3 more elements
Dependencies are inferred from the claim text.