泥浆在单向固结时压缩曲线的归一化关系研究

Study on the Normalized Relation of the Compression Curve of Slurry under One Dimensional Consolidation

以西澳土料与水混合成的泥浆制备土样进行单向固结试验,同时在大量泥浆制成的重塑土单向固结试验数据基础上拟合出量纲一致的Iv—p关系式,然后根据4个界限条件对Iv—p关系式中的参数进行研究,得出泥浆在单向固结时的归一化e—p关系式。结果表明,对于初始含水率在1.25倍液限含水率附近的泥浆,p为100kPa时的孔隙比是初始孔隙比的1/2;p为1000kPa和100kPa时的孔隙比之间的比值约为0.625;从泥浆状态开始已压缩的孔隙比与当前孔隙比的比值与p/P_a在对数坐标系中成正比例关系,比例系数约为0.34。

The oedometer test was performed on the reconstituted soil prepared from slurry composed by Western Australian residual soil and water.An expression with dimensional consistency of intrinsic compression line which represented the relationship between void index Ivand consolidation pressure p was proposed based on a large number of oedometer tests on reconstituted soils from slurry.Four boundary conditions were used to study the parameters in the expression between Ivand pand an e—pexpression of slurry was deduced.Meanwhile some conclusions were obtained：for slurry with the initial water content of near 1.25 times liquid limit water content.The void ratio when pis 100 kPa is half of the initial void ratio;the ratio of the void ratios when pis 1000 kPa and 100 kPa is around 0.625.The ratio of the compressed void ratio from slurry state and the current void ratio has a directly proportional relationship with p/Pain the logarithmic coordinate system and the proportionality factor is about 0.34.Finally the above conclusions were verified by test results.