CE2004 earth pressure&liquefaction_handout0

CE2004 earth pressure&liquefaction_handout0 -...

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Lateral Pressure, Ground Movement and Liquefaction CE2004
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What we’ll cover Soil at rest and overconsolidation Lateral earth movement Lateral spreading Liquefaction
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Soil “at rest” Point at which lateral strain in a soil = …… Represents transition between active and passive pressure states p 0 = k 0 γ ′ z K p K a K 0 Where: p 0 = pressure at-rest; k 0 = coefficient of earth pressure at rest γ ′ = unit weight; z = depth expansion compression
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Determining K 0 Influenced by …………. .events Is soil loose or …………………………. . Present stress = maximum experienced Soil is normally consolidated (nc) Present stress is < maximum experienced Soil is overconsolidated (oc)
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Overconsolidation Void ratio e Stress a b c d a b load applied, void ratio reduces b c load removed, void ratio does not change - overconsolidated c b load applied, void ratio does not change until stress at point b exceeded - recompression e.g. a clay soil
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CE2004 earth pressure&amp;amp;liquefaction_handout0 -...

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