Analysis of Internal Stability of Widely Graded Soils Based on Identification of Mobile Particles

摘要

This paper illustrates an approach for analyzing the internal stability of widely graded soils using a statistical methodrnfor identifying the mobile particles and considering geometrical filtration response. The separation of the soil into tworncomponents, supporting skeleton and mobile particles, can be used to define a filter-base-combination and therefore tornassess the geometrical filtration response of widely gap graded soils. The statistical analysis which was validated withrnexperimental information was used to derive the separation point of particle size distribution of gap and widely gradedrnsoils. After identifying the range of mobile particles and considering the filter-base-combination, the internal stability ofrnthis soil was analyzed with the Terzaghi geometrical filtration criterion. In order to have a comparison with otherrnbroadly used methods 20 particle size distributions from the literature were chosen. They were analyzed to investigaternthe suitability and validity of this new approach.