Abstract
To study the properties of the base of sandy soil and internal erosion of dam body, we designed equipment for the experiment of seepage failure that was able to measure the confining pressure, changes of water head and amount of quicksand. In results, the amount of quick sand, differential head and flow velocity reduced with increase of confining pressure in the seepage failure experiment. In addition, the incident of erosion, differential head and critical velocity reduced with the increase of maximum particle diameter of sandy soil. In conclusion, the study showed the correlation of flow velocity of seepage failure with differential head and maximum particle diameter. Keywords: Seepage Failure, Internal Erosion, Quicksand, Sandy Soil, Confining Pressure
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