The Dynamic Characteristics Of Organic Impregnation Sand Bay Phase Research

In recent years,due to the large-scale engineering projects in China,there are various engineering projects with complicated conditions,which are found in the study of problems in some engineering projects.The content of organic matter in soil can change soil properties.It is very important to study the effect of organic matter on soil properties.In view of this,a more systematic study was carry out on that organic matter impregnation sand in bay phase base on the same subject team study.The dynamic characteristics and liquefaction of sand samples under the vibration load were studied by using the GDS vibration triaxial instrument and the WS-Z30 small vibration table.The dynamic stress-dynamic strain relation,dynamic elastic modulus,damping ratio and dynamic strength of the sample under different water content and confining pressures are analyzed.The following conclusions are obtained through the experiment:(1)There's a difference in the dynamic characteristics of the different water rate,and the same sample is different in different stages,but the overall performance has a certain regularity.(2)Under the same dynamic strain condition,with the increase of water content,the dynamic stress in the organic matter disseminated sand is smaller.At the same time,the dynamic stress of organic matter disseminated sand increases with the increase of confining pressure.(3)The change trend of dynamic elastic modulus is more gentle when the moisture content changes.The dynamic modulus decreases with the increase of moisture content.Under the same moisture content,with the increase of moisture content,the dynamic elastic modulus becomes smaller and smaller.As the confining pressure increases,the dynamic elastic modulus increases gradually.(4)The damping ratio increases with the increase of the dynamic strain and decreases with the increase of moisture content.When the confining pressure changes,the change of damping ratio is not obvious.(5)The dynamic strength decreases with the increase of moisture content,and increases with the increase of confining pressure.