福州滨海地区原状淤泥的力学特性试验研究

对福州可门港原状淤泥进行单向压缩和三轴固结不排水试验。试验得到了福州地区滨海淤泥在荷载作用下由弹性状态向塑性状态变化过程中其固结应力、孔隙水压力与轴向应变的关系以及应力路径曲线的特征。对试验结果进行分析可知,福州淤泥的固结屈服应力随着土层深度的增加而增加,但压缩模量与深度关系不大。通过三轴试验和三轴固结-回弹-再压缩试验得到福州软土修正剑桥模型的指标参数,为该地区滨海软土本构模型及参数的研究与应用提供参考。

Experimental Study on Mechanical Properties of Marine Soft Soil in Fuzhou

After experimental study on marine soft soil in Kemen Port, Fuzhou City with one dimensional consolidation test and consolidated undrained triaxial test, during the test process of marine soft soil in Fuzhou under load changes from elastic state to the plastic state, the relationship between consolidation stress, pore water pressure and axial strain, and the characteristic curves of stress path have been gained. The experiment results indicated that, with the increase of the soil depth, the consolidation yield stress of marine soft soil increased, but had little relation to compression modulus. The soil parameters for Modified Cambridge Model were obtained with the consolidation, springback and recompression test, which were expected to give some general guideline for the application of constitutive model of marine soft soil in Fuzhou.