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通过对6种不同的天然沉积土重塑样进行一维压缩次固结试验,明确了重塑黏土次固结变形的主要影响因素为孔隙比与对应于液限的孔隙比,得出了重塑黏土的次固结系数随着固结压力的增大和孔隙比的减小而减小,且相同孔隙比下次固结系数随液限的增大而增大的规律。定义了ln(1+e)-lnt双对数坐标下的次固结系数CαL,提出了双对数坐标次固结系数与液限孔隙比的定量关系表达式,为重塑黏土提供了简便实用的次固结变形计算方法,也为进一步完善Burland等提出的固有压缩概念与压缩理论奠定试验基础。
Through the one-dimensional compression consolidation test on six different natural soils, it is found that the main influencing factors of the secondary consolidation deformation of the remolded clay are the void ratio and the void ratio corresponding to the liquid limit, The secondary consolidation coefficient of plastic clay decreases with the increase of consolidation pressure and porosity, and the same porosity increases with the increase of liquid limit. The secondary consolidation coefficient CαL in double logarithm of ln (1 + e) -lnt is defined. The quantitative relationship expression between double logarithmic secondary consolidation coefficient and liquid limit porosity ratio is proposed, which provides a simple and convenient method for remolding clay Practical calculation method of secondary consolidation deformation, but also to further improve the Burland et al. Proposed inherent compression concept and compression theory laid the experimental foundation.