高填路基粗颗粒填料的压缩变形特性研究

High fill embankment coarse particle packing compression deformation characteristics of the study

粗颗粒土在铁路建设中应用广泛,研究其压缩变形特性对控制高填路基的沉降变形具有重要的意义。针对沪昆客专芷江北站泥质板岩填料,通过单轴压缩试验研究含水率和颗粒组成对其压缩变形的影响,分析粗颗粒填料在不同含水状态下、不同颗粒组成情况下的压缩变形特性。结果表明压缩变形与时间成对数关系,含水率和颗粒组成是影响粗颗粒填料压缩变形特性的重要因素,提出使用干燥或饱和含水状态、级配良好且粗细颗粒组土质量百分数比为70∶30的粗颗粒填料以控制路基沉降。

Coarse granular soil has been widely applied in railway construction, to study the characteristics of compression deformation on control is of great significance to the high fill subgrade settlement deformation. For shanghai - kunming guest designed zhijiang north station argillaceous SLATE packing, by uniaxial compression test research of moisture content and particle composition on its compression deformation, analysis of coarse particle packing in different water conditions, com- pression deformation characteristics of the particles in different circumstances. Results show that compression deformation and time several relations in pairs, moisture content and particle composition are the important factors influencing the coarse particle packing compression deformation characteristics, proposed to use dry or saturated state, grading and good granules group of soil quality percentage ratio of 70：30 of coarse particle packing to control the embankment settlement.