On the basis of the uniaxial compressive test and routine triaxial test results of Q_2 and Q_3 loess,the features of strain-stress curves of Q_2 and Q_3 loess are compared.

The uniaxial compressive test results of Q2 loess in various water content in Xi an show the strain-stress relationships of Q2 natural loess is strain-soften type.

The variation of interior structure of unsaturated natural Q2 loess in triaxial tests was monitored instantaneously,quantitatively and nondestructively by means of computerized tomography(CT) technology.

In order to study the rheological characters of Q2 loess,the indoor uniaxial and triaxial creep tests under different pressure of Q2 loess with different water contents in Xi\'an are carried out,the uniaxial and triaxial creep curves and tress-train isochronous curves are presented.

Based on the direct-shear tests and the unconsolidated-undrained triaxial tests,the authors study the regulation relationship between shear strength and water content of Q_3 loess in North Shaanxi Province.

Calculation of CFG pile s neutral point in saturated loess district with ADINA;

Study on dynamic failure mechanism of saturated loess slopes;

Finite element analysis of shallow saturated loess reinforced with geocell;

Analysing the grain size of Minhe loess, it is found that the volume of grain size in Minhe loess is obviously different with other area such as Lanzhou and Luochuan and Xi an, it s grain diameter is evidently much higher.

An integrated analysis has been performed of the climatic carriers such as magnetic susceptibility, grain-size, CaCO3 and TOC in the Minhe loess on the northeast margin of the Qinghai-Tibet Platean.

Grain-size analysis of the Minhe loess on the northern margin of the Qinghai-Tibet Plateau in-dicates that the grain-size distribution of t he Minhe loess is obviously different from that in other areas such as Lanzhou and Luochuan and Xi an.