SHEAR STRENGTH OF HEAVILY COMPACTED HIGH PLASTICITY CLAY
The matrix suction caused by capillary effects contributes significantly towards shear strength for wide range of soil types. The additional shear strength caused by suction is named as apparent cohesion and effect of this has been successfully incorporated into the constitutive framework for unsaturated soils. The apparent cohesion is generally assumed to be function of suction regardless the previous history of the unsaturated soils. The apparent cohesion in overconsolidated soils can consist of two components: cohesion induced by suction and cohesion induced by previous stress history. The work reported in this note examines the cohesion induced by the latter generated caused by the initial compaction process. Samples of kaolin were statically compacted in layers to a design bulk density equivalent to that of a sample compacted using Standard Proctor compaction. The samples were taken to failure through various stress paths. The stress parameters p-ua and q corresponding to peak state are used to establish the failure line which has allowed an estimation of the peak strength parameters c, the cohesion caused by the previous history and the results have shown that the magnitude of it influenced by suction.
V.Sivakumar J.Vimalan J.Brown
Queens University Belfast V J Tech Ltd, Reading, U.K.
国际会议
南京
英文
297-302
2007-04-21（万方平台首次上网日期，不代表论文的发表时间）