1) Silty clay and clay with plasticity index of 10~ 15 should be used, and sandy soil with plasticity index greater than 4 can also be used, and the organic matter content in the soil is less than10%; Grade 1~3 new ash should be adopted. The ground quicklime can be used directly without digestion. Hydrated lime should be digested 2 ~ 3 days before use. Hydrated lime should be screened out, and the particle size of hydrated lime should not be greater than10 mm. ..

2) The mix design of lime soil should be accurate, and the optimum lime content and water content of the mixture should be determined through the mix design to meet the requirements of 7d unconfined compressive strength.

3) When mixing lime soil, the mixing water consumption should be adjusted in time according to the change of water content of raw materials, the mixture should be uniform, the lime soil should be sieved, the virtual paving thickness should be controlled during paving to ensure the thickness and elevation of the base, and the water content should be at the best water content? Within 2 percentage points, it is strictly forbidden to level off by means of thin-layer subsidies. Lime soil should be kept moist, and the curing period should not be less than 7d. Traffic should be closed during the curing period.