High earth and rockfill dam anti-seepage earth material blending construction method

The invention discloses a high earth and rockfill dam anti-seepage earth material blending construction method which comprises the following steps: determining the position of a stock ground, sampling, detecting soil layer parameters, determining a clay layer and a gravel soil layer, layering the gravel soil layer of the stock ground again, determining the average parameter of each gravel soil layer after layering of the stock ground again, and calculating the blending ratio value and the water adding amount. Performing layered blending in a blending field according to a calculation result, adding water to adjust the P5 content and the water content, detecting the prepared soil material, and if the detection is qualified, performing high earth and rockfill dam filling; if the detection result is not qualified, blending again; according to the method, investigation and soil property analysis are carried out on a soil layer at the position of a damming material field, a soil material blending field is arranged