Influence of stress path on structural characteristic of loess

Using the SLB -1 triaxial and permeability apparatus with stress and strain control,triaxial tests with stress and strain control have been carried out on the intact loess of Shaanxi Yangling;the tests were carried out under consolidated undrained condition with different stress paths,which include conventional triaxial compression,reduced triaxial compression and with constant p.The influence of different stress paths on structural parameter of loess is studied.The experimental results indicate that,under different stress paths,with the increase of confining pressure,the structural parameters of the loess isn't always increasing.There is a peach when the confining pressure is 300 kPa;while the moisture content of loess is relatively higher,the structural parameter of loess is relatively smaller.