关键词: 静力压实试验, 压实变形特征, 含水率, 红砂岩粗粒土

Abstract:

To research the influence of different moisture content on static compaction deformation characteristics of red sandstone soil, the static load compaction tests were conducted by using universal electronic testing machine. Compression-displacement relations of red sandstone under 6 different water contents were obtained and the effects of moisture content on static compaction deformation characteristics were analyzed. The results show that in the compaction process of red sandstone, the relationship between the stress and displacement is exponential. The compression modulus of red sandstone increases linearly with growth of corresponding stress terminal value. Three stages were found during the compaction process of coarse-grain red sandstone, namely compaction stage, broken stage and stable stage. In the process of static compaction, a turning point existed in the strain growth, indicating a transformation from compaction stage to broken stage.

Key words: static compaction test, compaction deformation characteristics, moisture content, coarse-grained red sandstone