各向异性固结软粘土的循环软化-孔压模型

Cyclic-degradation-pore pressure generation model for anisotropic consolidated clay

通过对杭州软粘土进行应力控制的循环三轴试验,研究了各向异性固结软粘土的循环软化特性及孔压发展规律.试验结果表明,随着循环次数的增加和循环应力比的提高,软化指数逐渐降低,残余孔压逐渐增高;当采用各向异性固结时,初始静剪应力的增大会造成土体软化加快,但残余孔压变化缺乏一定规律性.建立了各向异性固结软粘土循环软化-孔压模型,该模型反映了软粘土循环软化特性及残余孔压增长规律.

In this paper,the residual pore-water pressures correlating to degradation index of anisotropic consolidated clay subjected to uniform stress-controlled triaxial loading are investigated.It is observed that the degradation index is lowered and the residual pore-water pressure is increased with the increasing number of cycles and the cyclic stress ratio.For anisotropic consolidated clay,the degradation index is lowered reduced with the increasing initial consolidation shear stress,however the development of ...