A 6 m. x 9 m. rectangular foundation carrying a uniform load of 288 kPa is applied to the ground surface. Compute the total vertical stress in kPa due to this uniform load at a depth of 6 m. below the center of the loaded area if unit weight of soil is 18,30 kN/m.

Q: Determine the net ultimate bearing capacity of a mat foundation measuring

A: Given : L   = 20m B   = 9m Df = 0.5m ϕ   = 0 Cu=95 kN/m2

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Q: subject : Geotechnical Design Book : PRINCIPLE OF FOUNDATION ENGINEERING

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Q: Question attached

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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.