4. A trapezoidal masonry retaining wall 1 m wide at top and 3 m wide at its bottom is 4 m high. The vertical face is retaining soil (= 30°) at a surcharge angle of 20° with the horizontal (shown in figure below). Determine the maximum and minimum intensities of pressure at the base of the retaining wall. Unit weights of soil and masonry are 20 kN/m³ and 24 kN/m³ respectively. Assuming the coefficient of friction at the base of the wall as 0.45, determine the factor of safety against sliding. Also, determine the factor of safety against overturning. 1 m B= 20° y = 20 kN/m³ $ = 30° Toe y = 24 kN/m 3m - Heel

4. A trapezoidal masonry retaining wall 1 m wide at top and 3 m wide at its bottom is 4 m high. The vertical face is retaining soil (= 30°) at a surcharge angle of 20° with the horizontal (shown in figure below). Determine the maximum and minimum intensities of pressure at the base of the retaining wall. Unit weights of soil and masonry are 20 kN/m³ and 24 kN/m³ respectively. Assuming the coefficient of friction at the base of the wall as 0.45, determine the factor of safety against sliding. Also, determine the factor of safety against overturning. 1 m B= 20° y = 20 kN/m³ $ = 30° Toe y = 24 kN/m 3m - Heel

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter15: Retaining Walls, Braced Cuts, And Sheet Pile Walls

Section: Chapter Questions

Problem 15.9P

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