bitumen or tar emulsion or stabilizing oil surrounds collections of soil particles in a waterproof film. This prevents the soil from becoming soft, through the infiltration of water, and so improves its capacity to bear weight.

• 沥青、柏油乳胶或者稳定油在防水层中稳定土壤颗粒,这样,阻止了水的渗透,确保基层土的稳定性,从而提高其承重能力。