정지토압계수 측정에 관한 연구 Ⅱ
A Study on Measuring the Coefficient of Earth Pressure at Rest Ⅱ
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In order to investigate the characteristics of the lateral earth pressure at rest, under hysteretic conditions, seven types of multi-cyclic models have been studied, using dry sand. For this study, the new type of apparatus was developed, and the horizontal pressure was accurately measured. The multi-cyclic models consist of primarily 3 cases: (i) under the same loading / unloading condition, (ii) multi-cyclic loading / unloading exceeding the maximum pre-vertical stress, and (iii) multi-cyclic loading / unloading within the maximum pre-vertical stress. Results fromthe multi-cyclic model indicated that a single-cyclic model could be extended if the exponents for the unloading condition and the reloading coefficients were primarily dependent upon the type of model, number of cycles, and the relative density.
Abstract
In order to investigate the characteristics of the lateral earth pressure at rest, under hysteretic conditions, seven types of multi-cyclic models have been studied, using dry sand. For this study, the new type of apparatus was developed, and the horizontal pressure was accurately measured. The multi-cyclic models consist of primarily 3 cases: (i) under the same loading / unloading condition, (ii) multi-cyclic loading / unloading exceeding the maximum pre-vertical stress, and (iii) multi-cyclic loading / unloading within the maximum pre-vertical stress. Results fromthe multi-cyclic model indicated that a single-cyclic model could be extended if the exponents for the unloading condition and the reloading coefficients were primarily dependent upon the type of model, number of cycles, and the relative density.