A rectangular concrete slab, 3 m x 4.5 m, rests on the surface of a soil mass. The load on the slab is 2025 kN. Determine the vertical stress increase in kPa at a depth of 3 m under the center of the slab.

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

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Q: • Thickness of sand layer = 6 m (i.e. X = 6 m) • Thickness of gravel layer = 5 m (i.e. Y = 5 m) •…

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Q: The major principal stress (kPa) on the soil element is (anti-clockwise shear +ve) 100 kPa 50 kPa…

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Q: 1. Compute the effective stress at the mid-height the clay layer. a. 80.21 kPa c. 51.30 kPa b. 84.58…

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A: Given data :increase in vertical stress () = 75 vertical depth ( z1) = 3 mstress at depth (z2) = 5 m…

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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.