The soil profile at a site consists of 2 m of clay (ybulk = 19.5 kN/m3; y sat = 20.93 kN/m3) overlying a deep deposit of gravel (ybulk = 16.8 kN/m3; ysat = 17.41 kN/m3). If the water table is at the top of the clay, determine the %3D depth from ground surface at which the effective vertical stress is 120 kPa(also from the ground surface). Assume the unit weight of water is 9.81 kN/m3. O 12.86 m O 14.86 m 14.39 m O 4.56 m O 6.56 m

Q: Note:hand written solution should be avoided.

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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.