Through the experiment

the mixture ratio of Yellow River alleviation (silting) soil stabilized by lime-fly ash is studied. The standard age of strength of Yellow River alleviation (silting) soil stabilized by lime-fly ash is analyzed. The influence law of soil and lime-fly ash ratio and content to the strength of lime-fly ash soil is studied; and the new idea about mix design of Yellow River alleviation (silting) soil stabilized by lime-fly ash is put forward. Research thought that the mix design should be based on the 21 d unconfined compression test of Yellow River alleviation (silting) soil stabilized by lime-fly ash

is put forward. The most suitable lime-fly ash ratio of Yellow River alluvial plain soil is 1: 3

and the most suitable lime-fly ash content is between 30 % and 40 %. The grain content of <0.005 mm and organic matter content and thickness ratio can influence the strength of Yellow River alleviation (silting) soil stabilized by lime-fly ash obviously; and the interrelation among them is regular. When the grain content of <0.005 mm is between 17 % and 27 %

the Yellow River alleviation (silting) soil stabilized by lime-fly ash can obtain higher strength.