Liquefaction
description
Transcript of Liquefaction
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KNS4553 SOIL DYNAMICS
KANIRAJ SHENBAGA & NORAZZLINA BT M. SA'DON
UNIVERSITY MALAYSIA SARAWAK
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By the end of this course, the students should be
able to design machine foundations complying with
design criteria, evaluate liquefaction potential of
saturated soil, suggest preventive measures,
evaluate lateral earth pressures during earthquakes,
and recommend vibration isolation measures.
Learning Objective 3
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By the end of this course, the students should
be able to investigate contemporary practices
and issues on applications of soil dynamics in
machine foundations and earthquake
engineering and prepare technical reports of
the investigations.
Learning Objective 4
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Liquefaction
KNS4553 Soil Dynamics
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http://thewatchers.adorraeli.com/2011/06/13/christchurch-liquefaction-videos/
http://www.youtube.com/watch?v=JG4stumV9EQ
http://www.youtube.com/watch?v=_r7WbKLDnYU&list=PLyKoOnp09L5WhY1OYcm1OWMRNu8PtI_fJ&index=4
Liquefaction example videos
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Process of liquefaction
http://www.ce.washington.edu/~liquefaction/html/why/why1.html
• Increasing pore water pressure • Decreasing contact force
Pore water pressure Grain to grain contact force
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Overturned buildings in Niigata, 1964
http://www.ce.washington.edu/~liquefaction/selectpiclique/nigata64/tiltedbuilding.jpg
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Failure of retaining wall
http://www.ce.washington.edu/~liquefaction/selectpiclique/kobe95/lateralspread3.jpg
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Lower San Fernando dam, 1971
http://www.ce.washington.edu/~liquefaction/selectpiclique/dams/sanfernandodamairview3.jpg
Upstream slope failure
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Highway embankment, Alaska, 1964
http://www.ce.washington.edu/~liquefaction/html/quakes/alaska/crack.html
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Sand boils and cracks in Niigata, 1964
http://www.ce.washington.edu/~liquefaction/selectpiclique/nigata64/sandboils.jpg
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Lateral spreading in Niigata, 1964
http://www.ce.washington.edu/~liquefaction/selectpiclique/nigata64/showabridge.jpg
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Sand boil – Loma Prieta, U.S.A. 1989
http://www.ce.washington.edu/~liquefaction/selectpiclique/mosslanding/mosslanding1.jpg
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Lateral displacement, Kobe, 1995
http://www.ce.washington.edu/~liquefaction/selectpiclique/kobe95/portgraben.jpg
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Kobe earthquake, 1995
http://www.ce.washington.edu/~liquefaction/selectpiclique/kobe95/nishibridge1.jpg
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Displaced quay walls – Kobe 1995
http://www.ce.washington.edu/~liquefaction/selectpiclique/kobe95/portdamage.jpg