This study aimed to systematically explore the meso-structure multi-phase volume deformation mechanism and the deformation characteristics relationships of EPS (expanded polystyrene sheet) silt lightweight soil between macro- and meso-structure of the complex composition silt lightweight soil under cyclic loading. A series of modified consolidation tests and numerical simulation of the typical mix ratio silt lightweight soil samples were carried out. It was found that the EPS content had a significant effect on the deformation characteristics. The deformation and stress-strain curves of EPS particles at the upper, middle, and lower points were different under the same cycle times in the numerical simulation.

本研究旨在系统地研究循环荷载作用下复杂成分粉质轻质土宏观结构与细观结构之间的细观结构多相体积变形机理以及EPS（膨胀聚苯乙烯片）粉质轻质土的变形特性关系。对典型的混合比淤泥轻质土样进行了一系列改进的固结试验和数值模拟。发现EPS含量对变形特性具有显着影响。在数值模拟中，在相同的循环时间内，EPS颗粒在上，中，下点的变形和应力应变曲线是不同的。