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Bearing Capacity of Foundation on Cohesive Soil under Eccentric and Inclined Loads

Publication year Port and Airport Research Institute Report 009-02-02 1970.06
Author(s) Akio NAKASE,Masaki KOBAYASHI
Department
/Divison
Soils Division Soil Mechanics Laboratory
Executive Summary

 Bearing capacity of foundation on cohesive soil stratum under eccentric and inclined loads is analysed based on the assumption of either cylindrical slip surface and horizontal slip along the ground surface. Shear strength of soil, i.e. cohesion or undrained shear strength, is assumed to increase linearly with depth.
 The bearing capacity factor by the present analysis is expressed in the form of linear equation with respect to the shape factor of foundation. Value of the two constants in the equation is dependent on the distribution characteristics of cohesion and the eccentricity and inclination of the load. As the inclination of load increases, however, the bearing capacity factor tends to be determined from the condition of horizontal slip and its value becomes independent of the shape factor.
 The same sort of analyses have been reported by Meyerhof and others, where the cohesion is assumed to be uniform with depth. Comparing the results by the present analysis with the results by Meyerhof and others, the cohesion in these latter analyses is corrected for the linear increase with depth, it is found that the use of the bearing capacity factor by the present analysis is adequate in practice.

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