CEE 434

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RETAINING WALLS PART I
CEE 434 GEOTECHNICAL DESIGN FALL 2008
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Why?
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Applications
Do not go where the path may lead, go instead
where there is no path and leave a trail.
-Ralph Waldo Emerso
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Permanent / Temporary Retaining Structures
Cantilever retaining wall
Braced excavation
Anchored sheet pile
From N. Sivakugan
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Additional Applications
Gravity Retaining wall
Soil nailing
Reinforced earth wall
From N. Sivakugan
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Sheet Pile Walls
From N. Sivakugan
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Mechanically Stabilized Earth (MSE) Walls
Reinforced earth walls are increasingly becoming
popular.
From N. Sivakugan
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Crib Walls
filled with soil
Good drainage allow plant growth.
Looks good.
Interlocking stretchers and headers
From N. Sivakugan
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Active/Passive Earth Pressures
Wall moves away from soil
Wall moves towards soil
A
B
smooth wall
Granular Soils
From N. Sivakugan
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From N. Sivakugan
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Active Earth Pressure
- in granular soils
As the wall moves away from the soil,
?v
active earth pressure
pa
From N. Sivakugan
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Passive Earth Pressure
- in granular soils
As the wall moves towards the soil,
passive earth pressure
?v
pa
From N. Sivakugan
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(No Transcript)
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Rankine vs. Coulomb Theory
Source B.M. Das
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Coulomb Active Case
Source B.M. Das
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Coulomb Passive Case
Source B.M. das