The Permeability of Three Kinds of Improved Soil in Northwest Area and its Application in Foundation Treatment

Study on the permeability of three kinds of soil research, including in loess, calcareous-soil, lime and fly ash (two ash) of loess, cement-soil. Selects 10 groups of soil to determine the coefficient of permeability.The results show that: cement-soil of 3:7 can be used as impervious material than calcareous-soil of 3:7. Calcareous-soil of 3:7 can be used as seepage control material in short-term.Two-ash can not play this role; As the same time, we found that: The coefficient of permeability of all kinds of modified soil are increasing after 21 days.