Device and Method for Improved Pile Casting

a technology of improved pile casting and casting device, which is applied in the direction of bulkheads/piles, construction, foundation engineering, etc., can solve the problems of soil shrinkage, unevenness, and cracks that can be several meters deep
US20090279960A1Inactive Publication Date: 2009-11-12HAZZAN BASEM
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
HAZZAN BASEM
Publication Date
2009-11-12
Estimated Expiration
Not applicable · inactive patent

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Abstract

This invention deals with a device and a method for an improved concrete pile casting in swelling soils by substantially lowering or eliminating heave forces created in active soils from affecting said piles by surrounding selectable parts of the pile by an easily deformable material for lowering the horizontal and the vertical soil movement effect, and by providing a low friction surface for further lowering vertical forces effect. This inventive device and method further facilitates subsequent operations by permitting an easy and seamless casting of columns and by ensuring a clean and smooth pile surface for a better adhesion of new concrete to an old one, as well as preventing cement dough seepage to surrounding soil and concrete segregation.
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Description

FIELD OF THE INVENTION

[0001] This invention deals with a device for the neutralization, i.d. the lowering or the elimination, of heave forces acting on piles sunk in certain types of expansive soils and for the improvement of the properties of cast in situ piles.BACKGROUND OF THE INVENTION

[0002] Certain types of soils, such as clay and marl, swell when absorbing water and shrink when this water is exuded. Water is usually absorbed by soils during the rainy season and exuded by evaporation and the like during the dry season. The shrinkage leads to cracks which can be several meters deep and ten centimeters wide, depending on many factors. The soil depth in which this phenomenon occurs is called the active depth hereinbelow, and may not be uniform. In a rainy season following a dry one, water tends to flow into the cracks and leads to soil swelling, which also closes the cracks, and in the following dry season the soil shrinks to create cracks. Thus an annual soil shrinkage-swelling cyc...

Claims

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