营口地区软土固结不排水剪切应力-应变归一化性状研究

Study on the Normalized Behavior of Consolidated Undrained Shear Stress-strain of Soft Clay in Yingkou Area

通过对营口地区粘土三轴固结不排水剪切试验,得出在不同的固结压力下营口地区软土应力-应变曲线呈现硬化型特性,且土体中存在一种胶结构造直接影响软粘土的强度.同时对比分析了以(σ3)n、主应力差渐进值(σ1-σ3)ult为归一化因子的两种归一化方法的研究,并建立了相应的归一化方程可以对不同围压下的应力-应变曲线做出较好的预测.

Through the triaxial consolidation undrained shear test of clay in Yingkou area,it is concluded that the stress-strain curve of soft clay in Yingkou area shows hardening characteristics under different consolidation pressures,and there is a kind of cementitious structure in the soil that directly affects the strength of soft clay.In the same time,the two kinds of normalization methods,with(σ3)nand(σ1-σ3)ult as the normalized factor respectively,are compared and analyzed,and then establish the corresponding normalization equation to predict the stress-strain curves under different confining pressures.