RESEARCH ON THE STRENGTH CHARACTERISTICS OF REMOLDED LOESS FOR EMBANKMENT SLOPE UNDER VERTICAL LOADING

With the help of the true triaxial apparatus，plane strain tests of remolded loess were conducted in order to study the stress-strain relationship，the changing characteristics of intermediate principal stress and shear strength of remolded loess in plane strain condition． The test results showed that the stress-strain relationship curves of remolded loess were the hardening or strong hardening type during vertical principal stress loading． Under condition of the same coefficient of compaction and confining pressure，the smaller the moisture content was，the greater the strength of remolded loess was． On condition of the same moisture content and confining pressure，the greater the coefficient of compaction was，the higher the strength of remolded loess was． On condition of the same moisture content and coefficient of compaction，the greater the confining pressure was，the higher the strength of remolded loess was． The intermediate principal stress increased with the growth of axial strain． The greater the confining pressure and the smaller the moisture content were，the greater the intermediate principal stress was． With the moisture content being increased，the cohesion was reduced obviously and the internal friction angle was decreased slightly; with the coefficient of compaction being increased，the cohesion was increased significantly and the internal friction angle was almost constant．