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SKIRT-FOUNDATION SUBSIDENCE BEHAVIOR DUE TO UPWARD VERTICAL SEEPAGE ON HORIZONTAL SATURATED GROUND

Understanding the soil-water-structure interaction mechanism is important to control foundation skirt suction settling. Therefore, we used model testing to observe foundation subsidence due to upward seepage. Then we compared it with the ultimate bearing capacity formula and numerical analysis, such as 3D seepage analysis and smoothed particle hydrodynamics (SPH). Although the start of subsidence was controlled by the ultimate bearing capacity formula and the amount of subsidence was quantified by hydraulic gradient management, localized phenomena—such as sand boil and piping by seepage—made control difficult. Subsidence timing of the model test was reproduced through numerical analysis, and important knowledge was obtained for actual foundation penetration control.