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为了减小传统固定式固结容器中环壁摩擦力对试验的干扰,设计了一种浮环式固结容器,进行了重塑粉质黏土饱和试样标准固结试验,分析了两种固结容器中环壁摩擦力的作用机制差异及其对不同压力和压实度下试样压缩变形的影响。分析表明:对于两种固结容器,由环壁摩擦力造成的试样变形差值随压力的增加而增大,变形相对误差则随之减小并在高压力段趋于稳定;试样变形差值和相对误差随压实度的提高而增大,但在高压实度区间的变化不明显;环壁摩擦力对较硬土质和较小压力条件下的压缩变形影响最为显著,相对误差高达20%左右,而采用浮环式固结容器则可大大减小其干扰。
In order to reduce the disturbance of the wall friction in the traditional fixed-type consolidation container, a new type of floating-ring consolidation container was designed and the consolidation test of the saturated sample was carried out. The two kinds of consolidation Differences of action mechanism of ring wall friction in container and its influence on compressive deformation of specimens under different pressures and compactiities. The analysis shows that for two kinds of containers, the difference of specimen deformation caused by ring wall friction increases with the increase of pressure, and the relative error of deformation decreases with the increase of pressure and tends to be stable at high pressure. The difference and relative error increased with the increase of compaction degree, but not obvious in the high compaction interval. The friction of annular wall had the most significant effect on the compressive deformation under the conditions of harder soil and smaller pressure. The relative error Up to about 20%, while the use of floating-ring consolidation container can greatly reduce the interference.