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The DMT - ?_hc Method for Piles Driven in Clay

by S. Marchetti, L'Aquila Univ, Italy, L'Aquila Univ, Italy,
G. Totani, L'Aquila Univ, Italy, L'Aquila Univ, Italy,
R. G. Campanella, L'Aquila Univ, Italy, L'Aquila Univ, Italy,
P. K. Robertson, L'Aquila Univ, Italy, L'Aquila Univ, Italy,
B. Taddei, L'Aquila Univ, Italy, L'Aquila Univ, Italy,



Document Type: Proceeding Paper

Part of: Use of In Situ Tests in Geotechnical Engineering

Abstract:

This paper presents a tentative method for evaluating the limiting skin friction f//s for piles driven in clay based on sigma //h'c (horizontal effective stress at the interface at the end of the reconsolidation) determined by the S. Marchetti flat plate dilatometer test (DMT). This paper illustrates determinations of sigma //h'c against the dilatometer by using the standard DMT equipment and comments on a number of sigma //h (t) 'reconsolidation' curves obtained in various soil types. The paper also describes a comparison between f//s predicted by the proposed method and f//s determined from full scale pile load tests.

Subject Headings: Pile tests | Load tests | Soil dilatancy | Soil tests | Measuring instruments | Load bearing capacity | Clays

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