Abstract：Research purposes：In design of soft soil embankment, the calculations of the settlement and stability of the embankment need consideration of the consolidation history of soft soil. Based on sorting and analyzing the data from a large number of indoor soil mechanic tests and vane shear tests done for the experimental section of the Jiangmen-Zhuhai Highway in Zhuhai, the study was done to seek the consolidation historic characteristics of the deep soil embankment in this area.
Research conclusions：The upper soft soil layer at depth of 6~12 m and above in the area was in consolidation state, and its over-consolidation ratio was 1.1~1.89, but the value of OCR had rather big discreteness. The soft soil below the depth of 6~12 m in the area was in the less consolidation state, and its OCR was 0.45~0.94 and their calculated results were more reliable. In addition, in the depth range of the study, the OCR was reduced with the depth change. The experimental results showed using vane shear test to determine the consolidation history of soft soil could avoid the disturbance to the soil caused by soil sampling during consolidation for the indoor soil mechanic test and the result could reflect the actual consolidation state of the soil.
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2010, Vol. 27 
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