A rectangular footing 2.0 m by 3.0 m is built in a homogeneous bed of sand of having bulk unit weight 20 kN/m3 and saturated unit weight 21 kN/m3 with an angle of shearing resistance of (30+Y)°. The depth of the base of footing is 1.8 m below the ground surface and water table is located at a depth of 1.0m below the base of the foundation. Consider the factor of safety of 3. Use Terzaghi's Analysis a) Justify the adequacy of the footing if the proposed design load on the foundation is 1500 kN. b) Calculate the safe load can be carried by the footing if the water table is located at a depth 1.0 m below the ground Level.

A rectangular footing 2.0 m by 3.0 m is built in a homogeneous bed of sand of having bulk unit weight 20 kN/m3 and saturated unit weight 21 kN/m3 with an angle of shearing resistance of (30+Y)°. The depth of the base of footing is 1.8 m below the ground surface and water table is located at a depth of 1.0m below the base of the foundation. Consider the factor of safety of 3. Use Terzaghi's Analysis a) Justify the adequacy of the footing if the proposed design load on the foundation is 1500 kN. b) Calculate the safe load can be carried by the footing if the water table is located at a depth 1.0 m below the ground Level.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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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

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A rectangular footing 2.0 m by 3.0 m is built in a homogeneous bed of sand of having
bulk unit weight 20 kN/m3 and saturated unit weight 21 kN/m3 with an angle of shearing
resistance of (30+Y)°. The depth of the base of footing is 1.8 m below the ground
surface and water table is located at a depth of 1.0m below the base of the foundation.
Consider the factor of safety of 3. Use Terzaghi's Analysis
a) Justify the adequacy of the footing if the proposed design load on the
foundation is 1500 kN.
b) Calculate the safe load can be carried by the footing if the water table is located
at a depth 1.0 m below the ground Level.

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