This paper investigates the loading behavior and soil-structure interaction associated with a floating stone column under rigid foundation by using the discrete element method (DEM). The aggregates and soft soil are simulated by particles with different sizes. The rigid foundation is simulated by two loading plates at the same position with the same velocity. The stress distributions and microscopic interaction between the column and soft soil are investigated. The vertical stress of the column increases with settlement and decreases with the depth. The position of the column with large radial stress also has large deformation, which decreases from top to bottom. The vertical and radial stresses of the soft soil increase with settlement, and the radial stress shows high value in the upper part of soft soil. The stress concentration ratio is obtained by two loading plates, which decreases from 2.5 to 1.55 during loading. The interaction between column and soft soil shows that the column does not penetrate into the underlying stratum but drags the surrounding soil down.

中文翻译：

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刚性基础下浮动石柱的荷载行为和土-结构相互作用：DEM 研究

本文使用离散元方法 (DEM) 研究刚性基础下与浮动石柱相关的荷载行为和土-结构相互作用。骨料和软土用不同大小的颗粒模拟。刚性基础由两个加载板在同一位置以相同的速度模拟。研究了柱与软土之间的应力分布和微观相互作用。柱的竖向应力随着沉降而增加，随着深度的增加而减小。径向应力大的柱子位置也有较大的变形，从上到下逐渐减小。软土的竖向和径向应力随沉降而增加，径向应力在软土上部呈高值。应力集中比由两个加载板得到，加载时从2.5降低到1.55。柱子与软土的相互作用表明，柱子没有深入下伏地层，而是将周围的土壤拖下。