Application of Extension Assessment Method Based on Game Theory to Evaluate the Maintenance Quality of Urban Rail Transit Subgrade

The comprehensive weight determined method based on game theory integrates the subjective weight with objective weight,solving some problems occurred in traditional extension assessment method like index weight only depends on index data,ignoring the value attribute of index.In grade assessment,the deviation degree is gained through calculating the variable characteristic value.The subgrade maintenance quality of present operating rail transits in Beijing is evaluated in this paper via the method of improved matter-element extension assessment,and the evaluation result of present operating rail transits fits the actual condition finely.Through case evaluation,the method is proved reasonable and feasible in application to maintenance quality evaluation of urban rail transit subgrade.