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friction pile

construction

Learn about this topic in these articles:

use in building construction

  • In soil mechanics

    …on which they are set), friction piles (which transfer some of the pressure put on them to the soil around them, through friction or adhesion along the surface where pile sides interface with soil), or caissons (extra-large piles cast in place in an excavation, rather than prefabricated and sunk).

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  • construction of apartment buildings
    In construction: Foundations

    The friction pile of wood or concrete is driven into soft soil where there is no harder stratum for bearing beneath the site. The building load is supported by the surface friction between the pile and the soil.

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foundation, Part of a structural system that supports and anchors the superstructure of a building and transmits its loads directly to the earth. To prevent damage from repeated freeze-thaw cycles, the bottom of the foundation must be below the frost line. The foundations of low-rise residential buildings are nearly all supported on spread footings, wide bases (usually of concrete) that support walls or piers and distribute the load over a greater area. A concrete grade beam supported by isolated footings, piers, or piles may be placed at ground level, especially in a building without a basement, to support the exterior wall. Spread footings are also used—in greatly enlarged form—for high-rise buildings. Other systems for supporting heavy loads include piles, concrete caisson columns, and building directly on exposed rock. In yielding soil, a floating foundation—consisting of rigid, boxlike structures set at such a depth that the weight of the soil removed to place it equals the weight of the construction supported—may be used.

This article was most recently revised and updated by Kathleen Kuiper.