砂卵石土动、静特性的对比试验研究

 在室内砂卵石土动、静力特性对比试验基础上，通过大量试验数据对比分析了不同条件下非饱和砂卵石土和饱和砂卵石土的强度和变形特性。结果表明：非饱和试样和饱和试样破坏时，剪切位移变化比较一致，压力增大时，剪切位移增加；从非饱和土到饱和土，随着振动周次的增加， 粘着力和内摩擦角都有着不同程度的下降；不同含水量条件下，饱和样的强度增幅比较均匀，振动次数相同时，不同固结应力条件下的破坏应力约成等差关系；而非饱和样的强度增幅不均，有时相差很大 , 但非饱和砂卵石土的强度参数比饱和砂卵石土大很多。

Comparative Test Study on Sandy Pebble Soil Static-dynamic Behaviors

 On the basis of the static-dynamic mechanics comparative test ， by means of test data comparison and analysis on characteristics of deformation and strength of the unsaturated and saturated sandy pebble soils under different test conditions, the test results indicated that: shear displacement is almost the same when unsaturated and saturated soils reach shear failure ； with pressure increase ， shear displacement increases ； with vibration number increase ， cohesion and internal friction angle decrease ； under different water contents ， the strength of saturated soil uniformly increases ； under the same vibration number ， and different consolidation stresses ， the failure stress is almost arithmetic progression relationship ； but the strength of unsaturated soil ununiformly increases ， sometime, the difference is very greatly. The strength parameter of unsaturated soil is bigger than that of the saturated soil.