Experimental Study on Load Ratio of Packing Materials in Expressway Engineering
Taking an expressway expansion project in Zhejiang Province as an example,the paper adopts the method of filling load ratio(CBR)test to evaluate the performance of subgrade soil in expressway project.The results show that the sand density is 1.8 g/cm3,the water content is 15%,the particle size is mainly between 0.425 mm and 2 mm,the maximum dry density is 1.65 g/cm3,the shear strength is 95 kPa,and the CBR value is 9%and 8.5%at the penetration depth of 2.54 mm and 5.08 mm,respectively.Compared with clay and silt,sand has better bearing capacity and stability.
Filling load ratioEngineering inspectionEvaluation model
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