中文摘要：

为研究由原料土、聚苯乙烯颗粒和高分子材料SH固化剂混合而成的高分子材料固化轻质土的压缩变形特性,在单向压缩试验的基础上,对高分子材料固化轻质土的压缩变形规律、机制以及水环境对压缩变形特性的影响进行分析.根据试验结果：（1）提出了适合该轻质土的广义孔隙比概念,建立了高分子材料固化轻质土压缩变形曲线预测模型,模型能较好的反映孔隙比随荷载的变化;（2）水环境作用下高分子材料固化轻质土的压缩变形曲线表明干湿循环和浸水初期,固化轻质土的压缩变形量受水环境影响较大,随着循环次数的增加和浸水时间的延长,水环境变化对轻质土压缩变形量的影响逐渐减弱.

英文摘要：

This paper focused on the compressive deformation behavior of a lightweight soil. The lightweight soil is made of original soil, polystyrene （EPS） beads and polymer SH. The polymer SH is used as a hardening agent. Based on one-dimension compression tests, the behaviors and mechanism of compressive deformation of the lightweight soil were investigated. The effects of water environment on the compressive deformation behaviors were also investigated. According to the testing results, a concept, which is called as generalized void ratio, was suggested. A prediction model, which may simulate the compressive deformation curve of the lightweight soil, was also suggested. The model can simulate well the change of void ratio with load because the predication from the model was almost the same as actual measurement. The water environment may affect the compressive deformation behaviors of the lightweight soil. Under drying and watering cycle conditions or at earlier soakage, the compression deformation curve is greatly affected by water. But the influence of the water decreases with increasing the number of the drying and watering cycle or lengthening the period of soakage.