APPROXIMATE CALCULATION OF NEGATIVE SKIN FRICTION OF A PILE

[摘要] References(4)In order to know a variation of the compressive stress with depth, occurred in a pile driven into soft soil and subjected to negative skin friction due to its subsidence, the equation proposed by H.B.Seed & L.C.Reese was solved under the assumption of an elastoplastic relationship between the relative displacement of a pile to its surrounding soil and its skin friction. On the basis of the solution thus obtained, the general expressions with respect to a location of inflection point, maximum compressive stress, stress at a pile tip, and settlements of the top and the tip of a pile were developed. Futhermore, some shapes of distribution both of initial skin friction due to an acting load and of a soil subsidence were adopted into these expressions to provide with formulae for practical use, and they were diagrammed. A comparison with the values computed by such analytical procedure to the ones measured on the field tests gave to some extent satisfactory agreement.

[学科分类] 建筑学