The Study On The Regional Regularity Of Loess Collapsibility In Northern ShaanXi-GuanZhong

Loess is widely distributed in China, there are plenty of projects processed in loess area,and the special character of loess--collapsibility is the most typical engineering geologicalproblem ,and destructively to project. So, the further study of collapsibility is very necessary.The paper against the variety of loess collapsibility character has definite disciplinary in region, and divided Chinese loess to different region according to this disciplinary ,the collapsibility character is variable. This paper is sampling loess of the same depth from Northern ShaanXi - GuanZhong in loess plateau allusion to disciplinary of loess collapsibility , and 7 groups are sampled .At first ,the general analysis and collapsibility should be measured. Finding out the trend of every physics parameters (porosity ratio; natural moisture content; dry density; plasticity index; clay content).and qualitative relations between collapsibility and these parameters. Then, the quantitative analysis model of collapsibility and physics parameters is established using regress method. Consequently, speculate the trend of collapsibility based on the variable of physics index.Secondly, through analyzing loess slice of different regions, microstructure is observed under micropolaricope. and find out the trend of loess microstructure and characteristic of every structure collapsibility fore-and-after from north to south. Then find out the diversification disciplinary between microstructure and collapsibility.At last, finding out the corresponding relationship through analyzing microstructure and physics parameters, reflecting their coherence in loess collapsibility variety.This paper select physics parameters and microstructure as impacting loess collapsibility factors, and analyzing their relativity, finally, reflecting collapsibility through physics parameters and microstructure and processing collapsibility evaluation.