A column foundation [ 2.0 m x (1.7m] in size is located at a depth of 1.4 m in a strong cohesive soil layer 2.4 m thick has a unit weight of 19.7 kN/m3, cohesion of 29 kN/m2 and , friction angle of 28o. This layer overlies a weaker cohesive soil layer 15 m thick has a unit weight of 16.3 kN/m3, cohesion of 8 kN/m2 and friction angle of 20o. Determine the allowable foundation load if the factor of safety is 2.5. Show all the related labeled sketches clearly.

A column foundation [ 2.0 m x (1.7m] in size is located at a depth of 1.4 m in a strong cohesive soil layer 2.4 m thick has a unit weight of 19.7 kN/m3, cohesion of 29 kN/m2 and , friction angle of 28o. This layer overlies a weaker cohesive soil layer 15 m thick has a unit weight of 16.3 kN/m3, cohesion of 8 kN/m2 and friction angle of 20o. Determine the allowable foundation load if the factor of safety is 2.5. Show all the related labeled sketches clearly.

Principles of Foundation Engineering (MindTap Course List)

9th Edition

ISBN:9781337705028

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter10: Mat Foundations

Section: Chapter Questions

Problem 10.10P: A 300 mm 450 mm plate was used in carrying out a plate loading test in a sand, during which the...

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Concept explainers

Methods to Determine Vertical Stress

The load applied to the soil is transferred to the underground. The presence of water at soil pores and solid grains above the soil are the primary components that are responsible for the effective load transfer. Due to the load acting, the internal component of the soil or the underground formations undergoes deformations or a tectonic shift. The amount of deformation depends upon the amount of load acting on the soil surface, which indeed, depends on the weight of everything present above the soil. Due to this, the underground soil element develops internal stresses which try to resist the tectonic changes.

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