5.4 A shallow foundation 25x18m carries a uniform pressure of 175kN/m². Determine the vertical stress at a point 12m below the mid-point of one of the longer sides (a) using influence factors. (b) by means of Newmark's chart

5.4 A shallow foundation 25x18m carries a uniform pressure of 175kN/m². Determine the vertical stress at a point 12m below the mid-point of one of the longer sides (a) using influence factors. (b) by means of Newmark's chart

Principles of Foundation Engineering (MindTap Course List)

9th Edition

ISBN:9781337705028

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter6: Shallow Foundations: Ultimate Bearing Capacity

Section: Chapter Questions

Problem 6.21P: Consider a continuous foundation of width B = 1.4 m on a sand deposit with c = 0, = 38, and = 17.5...

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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.

Question

5.4 A shallow foundation 25x18m carries a uniform pressure of 175kN/m².
Determine the vertical stress at a point 12m below the mid-point of one of the
longer sides (a) using influence factors, (b) by means of Newmark's chart.

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