Comparison of different construction techniques for the catchment area with soil stabilizer

Soil stabilizer can solidify all kinds of soils and has manyadvantages such as using local materials, reducing sandstone dosage and saving engineering cost, so it has a wide applied prospectin water-harvesting system, especially in catchment area. Based on theclassification of stabilized-soil catchment area, four different construction techniques, namely, stiff-monolithic-smoothing with soil stabilizer slurry technique, stiff-monolithic-natural smoothing technique, stiff-brick technique and plastic-monolithic-natural smoothingtechnique, were analyzed. The rainwater harvesting efficiencies of catchment area with different construction techniques were above 90% and the coefficients of roughnesswere 0.011～0.014. Compared with concrete catchment area, the cost of stabilized-soil catchment area could reduce at least 40%. Results show that stiff-brick technique has an important position and value in future development and application, and plastic technique should be utilized in the only-one cachment area and the technique of smoothing with soil stabilizer slurry is very usefulto reduce the coefficient of roughness and the shrinkage on the surface.