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STABILISATION OF AN EARTH DAM USING DRIVEN PRESTRESSED CONCRETE PILES

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    Abstract

    The remediation of Sardis Dam in Mississippi to prevent potential sliding upstream along a thin liquefiable layer in the foundation is described. The upstream slope of the embankment was stabilised by nailing it to stable foundation soils using prestressed concrete piles with 0.6 m2 cross-section. This was an innovative and unusual solution in addition to being cost-effective. The paper explains how the moments and shears for design of the piles were obtained. The analytical procedures developed for this project have since been used on several dams with similar problems.

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