The invention relates to a treatment method for treating roadbed, in particular to a high-dosage
lime stabilized soil
subbase layer construction method which is fast in construction speed, high in achieving quality, and stable in soil
subbase layer. The high-dosage
lime stabilized soil
subbase layer construction method includes eight steps of construction preparation, measuring and setting out, material preparation, soil arrangement and ash distribution, stirring, reshaping,
grinding and activity preservation, wherein the step of material preparation includes
lime preparation and
soil preparation. When lime is prepared, the lime is firstly digested for 7-10 days and then sieved through sieving holes of 10 millimeters, and the water usage for
digestion is 500-800 kilograms /
ton. When soil is prepared, the
maximum size of the particle of the soil is not larger than 15 millimeters, and the quantity passing through sieving holes of 5 millimeters is larger than 60%. In the step of stirring, a stabilized soil mixer is matched with a ploughshare for stirring, and stirring depth is within the limit of infiltrating the subbase layer. When in construction,
water content of the materials is detected timely, and the materials are watered when the
water content is lower than -2% of the optimum
water content and aired when the water content is larger than +2% of the optimum water content.