软土次固结变形特性的试验研究

对原状和重塑软土做了大量的分级加载室内一维次固结试验研究.结果表明,荷载对次固结变形特性有着较明显的影响,并对其关系进行了探讨;原状土和重塑土有着相似的次固结变形规律,在相同荷载作用下的重塑土的次固结系数比原状土的次固结系数小;对室内试验结果用最小二乘法拟合出次固结系数与压力之间的关系,得出其关系表达式,为实际地基的次固结变形的计算提供参考.

Secondary Consolidation Deformation on Soft Soil

The 1D secondary consolidation tests of soft soils of undisturbed and disturbed through step loading has been carried out. The results show that secondary compression obviously relates to load. Coefficient of secondary consolidation increases with load and their relations are discussed; the rules of undisturbed soils are the same with these of disturbed soils, the coefficient of secondary consolidation of disturbed soils under the same load is less than that of undisturbed soils; Based on the laboratory tests results, the relations of coefficients of secondary consolidation and loads are given by least square method.