Abstract
Through the indoor one-dimensional consolidation and compression test of soft soil samples with different burial depths in the western Pearl River Delta region, this study evaluated the variation characteristics of the secondary consolidation coefficient with the consolidation pressure, load ratio, soft soil depth, the direction of the compression, consolidation time, compression index, and other factors like changes in the characteristics and correlation. The test results show that the secondary consolidation coefficient of soft soil is mainly affected by the load ratio. When the loading ratio remains constant or increases, the secondary consolidation coefficient increases with the increase in consolidation pressure. When the load ratio decreases, the secondary consolidation coefficient with the increase in consolidation pressure is gradually decreased. Moreover, the variation process is less affected by sampling depth and compression direction. The ratio of the secondary consolidation coefficient to the compressibility index is in a very limited range, indicating their linear relationship. The secondary consolidation coefficient has a time effect and decreases with the increase in the t 2 value. Finally, the research findings provide a basis for the design and research of soft soil foundations in this area.
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