Device and Method for Improved Pile Casting
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
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...