Combined with concrete practical project,it introduces the choice of raw material and mixing rate of passenger line basement project improving project,elaborates the features and constructing crafts of grey soil,discusses the quality controlling measures of common disease in grey soil,which can be used to guide the on-spot construction.

Combined with engineering instance,this paper analyzes the causes of the problems probably existed in paving road bed soil,grey soil and lime-fly ash macadam and in pavement construction,and proposes treatment measures in light of different problems,in order to ensure construction quality of road.

Probing into recycling mechanical properties of lime soil

To assure the quality of retailing backwall fill,the paper discussed the construction technology of lime soil mixture,retailing backwall fill and side angle treatment etc.

The treatment effect analysis of underpass back filling lime-soil behind abutment;

But in practice, there is a little knowledge about the properties and monitoring of lime-soil.

Thus, this paper has a further discussion about the mechanism and basic characteristics of lime-soil and lime-soil foundation.

Test about compaction and shearing ppoperties of lime-loess;

Through long-term laboratory tests of loess and lime, the trends of temporal variation of the lime-loess strength under optimum water content with different lime-loess ratios are researched.

And lime also is a kind of low-priced construction material, using lime-loess cushion and lime-loess compaction pile to treat collapsible loess foundations can gain good economy effect.