To solve problems of sampling representativeness or experimental results discreteness for earth-rock mixed spoil from mountain highway,and to obtain the spoil's engineering-scale parameters.Combining the total weight,fill vol-ume and limiting stand-up height of the spoil obtained during the digital construction process,formulas for the spoil's en-gineering-scale density,friction angle and cohesion are built,which form a methodology system for calculating the moun-tain highway earth-rock mixed spoil parameters.The application and validation of the method are done by a engineering case.Compared with traditional limited size and quantity tests method,this method is closely integrated with the con-struction process,eliminating additional sampling and experiment works.Additionally,the parameter values obtained are lower than those traditional ones,leading to conservative stability evaluation results.The method can serve as a useful supplement to traditional methods,which can provide parameter support for dynamic design and assessment,also aids in dynamic construction,planning stacking,construction optimization and construction risk management.
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