1972•Civil engineeringRequires access

FROST HEAVING OF PILES IN PERMAFROST

Jeffrey Allen, R W Huck

Abstract

FROST IN SOIL CAN CAUSE DESTRUCTIVE DIFFERENTIAL DISPLACEMENTS OF BUILDINGS BY CAUSING HEAVING ON PILES OR LOSS OF SOIL BEARING CAPACITY DURING THAW. PROPER INSTALLATION OF PILES CAN MINIMIZE EFFECTS OF FROST HEAVING. FORMATION OF ICE LENSES IS THE MAIN FACTOR CAUSING FROST HEAVING. HEAVING FORCE TRANSMITTED TO A NEARBY PILE DURING SOIL FREEZING IS PROPORTIONAL TO THE TANGENTIAL ADFREEZE STRENGTH, OR SHEARING FORCE AT THE PILE-FROZEN SOIL-INTERFACE. HIGHER PERMAFROST TEMPERATURES REQUIRE GREATER PILE EMBEDMENT INTO PERMAFROST TO ASSURE SUFFICIENT ANCHORING AGAINST FROST HEAVING. VIBRATORY INSTALLATION TECHNIQUES MAY ALSO BE USEFUL. PILE SPACING IS ALSO IMPORTANT. /ASCE/

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Key concepts: Frost heaving, Permafrost, Pile, Geotechnical engineering, Embedment, Geology, Frost (temperature), Shearing (physics)