Research On Improving The Quality Of Expansive Soil Of He-An Expressway And Its Relation With Geological Structure

The paper analyses the expansive soil distribution of He-An expressway affected by geological structure and stratum. By testing lots of samples from the district of Feixi, Lujiang and Tongcheng, the paper gains some indexes of expansive soils. Many beating experiments of different quantity of added lime and unlimited compress strength experiments of different protective time have been made. According to the data of beating experiments, the paper analyses the relationship between the optimal water content and the quantity of added lime, analyses the relationship between the maximal dry density and the quantity of added lime. On basis of the data of the unlimited compress strength experiments, the paper gets the relationship between unlimited compress strength of lime-soil and the quantity of added lime. The paper also discusses the reason why the limecan dispel the expansive and shrink quantity of expansive soils. Finally the paper analyses the relationship between expansive soils and its geologicalstructure.