吹填土次固结系数影响因素的试验研究

围海造陆已成为沿海地区土地开发的重要手段，为解决吹填土地基过量的工后沉降问题，本文对自行配制的吹填土进行了一系列一维固结试验，探讨了不同加荷时间、加荷比、预压荷载大小对吹填土次固结系数的影响。结果表明: 加荷初期，加荷时间对次固结系数影响较大; 吹填土的主次固结划分与加荷比有关; 不同加荷比下的土样次固结系数的终值趋于相等; 次固结系数受预压荷载的影响，表现先增后减的变化规律，当固结压力等于先期固结压力时，次固结系数达到峰值。

Experimental research on effecting factors of secondary consolidation coefficient in dredger fills

Landing in the sea has become the important means of coastal land development.To solve the problem of excessive after-construction settlement of dredger fills foundation,the authors carry out a series of tests of 1-D consolidation test on the self-prepared dredger fills and study the effects of the loading time,loading ratio and preloading to the secondary consolidation coefficient of dredger fills.The results show that the loading time has much effect on the coefficient at the beginning of loading.The division of the main and the secondary consolidation is relative to the loading ratio.The final values of the secondary consolidation coefficient tend to equal under different loading ratios.The secondary consolidation coefficient is influenced by the preloading with the rule of increased at first and then decreased.When the consolidation pressure is equal to the previous pressure,the secondary consolidation coefficient reaches to the peak.