Internal Stability Assessment of Granular Soils Based on Graphical Method to Determine the Delimiting Particle Size

Y. Dallo
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Abstract

Accurate assessment of the internal stability against suffusion for granular soils is very essential in order to prevent geotechnical structures failure. Many methods are available for this purpose with variety degrees of accuracy and usage complicity. This study is presenting a simple and a reliable method to assess the internal stability. The delimiting particle size of the granular soil is computed based on graphical method, and then the controlling constriction size, Dc35, of the primary soil skeleton is obtained based on an empirical equation and compared with the diameter of fine particles, d85. The soil is considered as internally stable if it has Dc35⁄d85 <0.75. The assessment of new method was compared with the most frequently used ones, as well as experimental tests, and its assessment was found to be fairly good.
基于图解法确定定界粒径的颗粒土内部稳定性评价
准确评估颗粒土抗渗透内部稳定性对防止岩土结构破坏至关重要。有许多方法可用于此目的,具有不同程度的准确性和使用复杂性。本研究提出了一种简单可靠的内部稳定性评价方法。基于图解法计算出颗粒土的定界粒径,然后根据经验方程得到原生土骨架的控制收缩粒径Dc35,并与细粒粒径d85进行比较。如果土壤的Dc35 / d85 <0.75,则认为土壤内部稳定。将新方法的评价结果与常用方法进行了比较,并与实验结果进行了比较,结果表明新方法的评价效果较好。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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