Earth Pressure & Retaining Walls

1
CE 3044-Foundation Engineering

• Earth Pressure Retaining Walls
• Introduction
• Earth Pressures
• Rankines Theory
• Coulombs Theory
• Retaining Structure Design

2
Earth Pressure

• Depend on
• Type and amount of wall movement
• Shear strength parameters of the soil
• Unit weight of the soil
• Drainage conditions in the backfill

• At-rest Pressure
• Active Pressure
• Passive Pressure

3
The At-Rest Condition
(NC)
(OC)
4
Rankines Theory
5
Active Condition
45o?/2
90o?
6
45o-?/2
90o?
7
(No Transcript)
8
(No Transcript)
9
Coulombs Theory
10
Coulombs Theory (Active Cond.)
11
(No Transcript)
12
Coulombs Theory (Passive Cond.)
13
Coulombs Theory (Passive Cond.)
Pp/b
?w