The Study On The Classification Of Loess Landscape And The Characteristics Of Loess Stratum

With the start and implementation of the strategy of the development of the western region and One Belt and One Road,the economic development of loess plateau in Northern Shaanxi region ushered in the new opportunities and challenges.As the important energy base,farming and animal husbandry production base and tourist base in China, engineering activities in Northern Shaanxi area are constantly strengthened.But the study of the engineering properties of loess in Northern Shaanxi region is very few.As the essential factors of engineering geological conditions,loess landscape and loess stratum should also be the focus of the research of engineering geological of loess in Northern Shaanxi.On the basis of a number of studies,through the field investigation,this paper studies the classification system of loess landscape and the basic characteristics of loess stratum in Northern Shaanxi.First,on the basis of the summary of the main origin and the classification principles of loess landforms in Northern Shaanxi,this paper studies the loess landform types in Northern Shaanxi.New northern shaanxi loess landform classification system is established.The classification system has the comprehensive,systematic and practical principles.It has a very high use value.Then this paper makes clear the boundaries of each era of quaternary.Then the standard of the division of strata sequence in Northern Shaanxi is determined.Finally according to the three field investigation route, some typical stratigraphic sections of loess are studied in Northern Shaanxi.This paper summarizes the characteristics of loess sections in three routes.On this basis,the laws of loess layer,paleoso,thickness,particle size of loess stratum in Northern Shaanxi is summed.The results of this study provids geological reference for the engineering construction and it has an important theoretical and practical significance.