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预测软土地基次固结沉降,取上海祁连山南路地铁站地层土样进行三轴压缩固结试验,分析次固结系数的变化特征并探究各个影响因素对次固结系数的影响,主要对不同土性指标、不同载荷条件次固结系数变化特征进行试验研究.结果表明:次固结系数会随着土性指标的变化而变化,其影响力不会随载荷的变化而减弱,表明土性指标对次固结系数影响起主导作用;次固结系数也会随载荷条件的变化而变化,但这种影响与土层所在的位置有关,对于深部土层以及压缩性较低的土层这种影响可以忽略不计,载荷因素对次固结系数影响起辅助作用.
Prediction of secondary consolidation and settlement of soft soil foundation, taking the soil samples from the subway station of Qilianshan South Road in Shanghai for triaxial compression consolidation test, analyzing the variation characteristics of secondary consolidation coefficient and exploring the influence of various influencing factors on secondary consolidation coefficient, mainly for different Soil characteristics and the characteristics of secondary consolidation coefficient under different load conditions were studied.The results show that the secondary consolidation coefficient will change with the change of soil characteristics and its influence will not be weakened with the change of load, The index plays a leading role in the secondary consolidation coefficient. The secondary consolidation coefficient also varies with the loading conditions, but this effect is related to the location of the soil layer. For the deep soil layer and the less compressible soil layer The influence of species is negligible, and the influence of load factors on the secondary consolidation coefficient plays an auxiliary role.