【摘要】 对汕头东部吹填软黏土进行了大量的一维压缩试验,系统地分析了不同条件下次固结系数的变化情况。试验结果表明:次固结系数随着孔隙比的减小、固结时间的增长而减小;在允许一定侧向变形的情况下,次固结系数较侧限条件下会有所增长;预压作用能消除一部分工后沉降。次固结系数随着固结压力的增长而增加,但当荷载大于2.3倍pc时,次固结系数的增长速率极小,基本可以认为次固结系数不再受荷载影响。次固结系数与压缩指数呈较好的线性关系,比值为0.028~0.049,且随着约束、加载条件的不同,两者的发展趋势一致。更多还原

【Abstract】 A series of oedometer tests were carried out to investigate the secondary consolidation coefficient of soft dredger fill in the estuary of eastern Shantou. The test results show that the secondary consolidation coefficient decreases with the decrease of void rate or the growth of consolidation time. When certain lateral deformation is allowed,the secondary consolidation coefficient is higher,and preloading can eliminate part of the post-construction settlement. The secondary consolidation coefficient increases with the consolidation pressure. Once the consolidation pressure reaches the value of 2. 3 times pc,the growth rate of secondary consolidation coefficient is very small,and the secondary consolidation coefficient is no longer dependent on consolidation load. The development trend of the secondary consolidation coefficient and compression index is consistent with different constraint and loading conditions,and a good linear relationship between them is found,where Cα/ Cc≈0. 028 ~ 0. 049.更多还原