1. Consider a frictionless retaining wall. Assume its surface toward the backfill side is vertical and the soil ground is horizontal. If the retaining wall moves towards backfill, answer the following based on Coulomb's earth pressure theory. (1.1) Show the forces acting on the failure wedge. (1.2) Draw the force polygon for this condition. (1.3) Write down the steps to find the resultant force of earth pressure per unit length of the wall. (1.4) About the Fig. 2, draw a graph showing the relationship between the displacement {u(-) and u(+)} of the retaining wall and the earth pressure, P that acts on that wall. Also, within the graph, indicate the earth pressures, that represent equivalent active and passive earth pressures. Displacement u(-) Retaining wall 0₁ TNT displacement u(+) Failure plane Retaining wall Failure plane 02 a) Active state b) Passive state Figure 2 (1.5) Explain the conditions under which Rankine's earth pressure theory and Coulomb's earth pressure theory become equal.

1. Consider a frictionless retaining wall. Assume its surface toward the backfill side is vertical and the soil ground is horizontal. If the retaining wall moves towards backfill, answer the following based on Coulomb's earth pressure theory. (1.1) Show the forces acting on the failure wedge. (1.2) Draw the force polygon for this condition. (1.3) Write down the steps to find the resultant force of earth pressure per unit length of the wall. (1.4) About the Fig. 2, draw a graph showing the relationship between the displacement {u(-) and u(+)} of the retaining wall and the earth pressure, P that acts on that wall. Also, within the graph, indicate the earth pressures, that represent equivalent active and passive earth pressures. Displacement u(-) Retaining wall 0₁ TNT displacement u(+) Failure plane Retaining wall Failure plane 02 a) Active state b) Passive state Figure 2 (1.5) Explain the conditions under which Rankine's earth pressure theory and Coulomb's earth pressure theory become equal.

Principles of Foundation Engineering (MindTap Course List)

9th Edition

ISBN:9781337705028

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter16: Lateral Earth Pressure

Section: Chapter Questions

Problem 16.3P: The soil profile at a site is shown Figure P16.3. Find the total horizontal normal stresses at A and...

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