Method for evaluating calcareous soil strength index based on light dynamic penetration test index

The invention discloses a method for evaluating a calcareous soil strength index based on a light dynamic penetration test index. The method comprises the following steps: drying a calcareous soil sample taken back on site, and determining [gamma], [gamma] and d50 of each type of calcareous soil sample through a soil test; setting D, and calculating [gamma] of each type of calcareous soil sample under various D; respectively measuring the cohesive force, the internal friction angle and the penetration hammering number of each type of calcareous soil sample under different [gamma], and the accumulated penetration depth of the probe after each hammering; respectively drawing a hammer count-cumulative penetration depth scatter diagram of each type of calcareous soil sample, and fitting data points in each diagram into a straight line, wherein the slope of the straight line is p of the calcareous soil sample; respectively drawing two scatter diagrams of p and indexes shown in the specification; and