For the data given in Example 11.15, determine the reduction in passive earth pressure for aÂ curved surface of failure if 8 = 30Â°. Solution For a plane surface of failure P from Eq. (11.76) is It is clear from the above calculations, that the soil resistance under a passive state gives highly erroneous values for Full Article…

**1**to

**4**of

**4**items

# Passive Earth Pressure problem example 1

A gravity retaining wall is 10 ft high with sand backfill. The backface of the wall is vertical. GivenÂ 8= 20Â°, and 0 = 40Â°, determine the total passive thrust using Eq. (11.76) and Fig. 11.24 for a planeÂ failure. What is the passive thrust for a curved surface of failure? Assume y= 18.5 kN/m3. SOLUTION

# Coefficients of Passive Earth Pressure Tables and Graphs

Concept of Coulomb’s Formula Coulomb (1776) computed the passive earth pressure of ideal sand on the simplifying assumption that the entire surface of sliding consists of a plane through the lower edge A of contact face AB as shown in Fig. 1 1.24a. Line AC represents an arbitrary plane section through this lower edge. The Full Article…

# Lateral Earth Pressure for at Rest Condition

If the wall is rigid and does not move with the pressure exerted on the wall, the soil behind the wall will be in a state of elastic equilibrium. Consider a prismatic element E in the backfill at depth z shown in Fig. 11.5. Element E is subjected to the following pressures. Full Article…