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Determining the Shear Strength of Clay Cakes Used in Centrifuge Model Tests

机译：确定离心机模型试验中粘土蛋糕的剪切强度

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As centrifuge time is expensive it is necessary to keep testing times to a minimum. Where clay forms an important part of the soil model, reasonable drainage periods can only be achieved by using a high permeability clay. This leads to serious problems if clay strengths and deformations, to be used in analysis of the test, are measured after the centrifuge is stopped: cavitation can occur, or air or water enter the soil, causing considerable softening. A vane has been devised for measuring undrained shear strengths during centrifuge flight and the strengths measured in kaolin have been found to be much higher than the values measured after stopping the centrifuge. Comparisons of strengths are also made with theoretical values and with cone resistances measured with a simple penetrometer.

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