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Title |
Dynamic Analysis of Stability and Liquefaction in Dams in Unsaturated Soil Mode |
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Author |
Samad Nazari, Mahmoud Hassanlourad, Elham chavoshi, Ali Mirzaii |
| Citation |
Vol. 26 No. 7 pp. 91-102 |
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Abstract |
Liquefaction is one of the destructive phenomenon in soils and terrestrial structures. Liquefaction happens when increase in pore water pressure causes decrease in shear strength in soil. This phenomenon can cause large and unstable subsidence in saturated and unsaturated soil embankments and dams. Regarding that most dams in Iran and the world are earth dams, and are founded on alluvial beds, and liquefaction is probable in these dams, therefore, in order to prevent dam destruction by liquefaction, one needs to consider the mentioned items very carefully. In this study, liquefaction and rupture of earth dams by earthquake in San Fernando as a case is analyzed by GeoStudio Software. The results show how this earthquake causes change in pore water extra pressure, tensions and liquefaction in a wide area of the foundation and core of the dam. This phenomenon causes great changes in forms and ruptures in saturated upstream and unsaturated downstream slopes. |
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Keywords |
Liquefaction, earth dams, San Fernando earthquake. |
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