软黏土固结系数确定方法探讨

根据揭普高速原状软土的室内固结试验结果和现场实测结果，对7种固结系数确定方法的原理、精度、使用简便性、优缺点等进行了比较研究。研究结果表明，三点法和时间平方根法是较好的方法，但采用时间平方根法时其固结试验应采用较大的加载比。研究还发现，同一场地单元、同类软土、不同土样的固结系数离散性较大。实际工程中，同一单元地段应进行多组固结试验计算固结系数，剔除较高值者，取余下均值为该地段的固结系数。

Discussion on computational methods for determining consolidation coefficient of soft clay

Based on the results obtained from the lab and in-situ data of the soft soil from Jieyang-Puning expressway, the principles, advantages and disadvantages, applicability of the common computational methods for lab and in-situ consolidation coefficient are detailed. Compared with other lab methods, the three point method and square root of time method are better than others. Study shows the discretization of consolidation coefficient from different samples at the same unit soil strata. In practical applications, multiple consolidation tests should be carried out to calculate consolidation coefficients at the same unit soil strata, the average value is reasonable.