압밀이론에서 2차 압축 적용 시점에 관한 연구
A Study on the Beginning Point of Secondary Compression in Consolidation Theory
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초록
To improve the problem that the settlement curve of the consolidation theory of Terzaghi does not match well with the actual settlement curve, weincluded a secondary compression settlement and analyzed it by varying the beginning point and then obtained the following results. The currentmethods of calculating the compression index from the log curve and the coefficient of consolidation from the time-dependent settlement curvefor each consolidation pressure proved that the final settlement amount will be consistent after a long time, but the actual settlement amount will alwaysbe smaller than the predicted settlement amount during the settlement progress stage. The consolidation factors estimated by the curve fitting with thecondition that the secondary compression begins in the second half of the primary compression showed similar values to the consolidation factorsestimated by the curve fitting for the primary compression only, and the settlement curves were in better agreement throughout the compression. Itshowed different values, showing low validity. It can be inferred that secondary compression acts from the point when a significant portion of the excesspore water pressure is dissipated, and the loading stress begins to have more influence on the skeletal structure of the soil. Analysis results show thatsecondary compression begins at the range of 91 % to 98 % on the average degree of primary consolidation.
Abstract
To improve the problem that the settlement curve of the consolidation theory of Terzaghi does not match well with the actual settlement curve, weincluded a secondary compression settlement and analyzed it by varying the beginning point and then obtained the following results. The currentmethods of calculating the compression index from the log curve and the coefficient of consolidation from the time-dependent settlement curvefor each consolidation pressure proved that the final settlement amount will be consistent after a long time, but the actual settlement amount will alwaysbe smaller than the predicted settlement amount during the settlement progress stage. The consolidation factors estimated by the curve fitting with thecondition that the secondary compression begins in the second half of the primary compression showed similar values to the consolidation factorsestimated by the curve fitting for the primary compression only, and the settlement curves were in better agreement throughout the compression. Itshowed different values, showing low validity. It can be inferred that secondary compression acts from the point when a significant portion of the excesspore water pressure is dissipated, and the loading stress begins to have more influence on the skeletal structure of the soil. Analysis results show thatsecondary compression begins at the range of 91 % to 98 % on the average degree of primary consolidation.
참고문헌 (23)
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