Method for judging mud cake forming risk of shield cutter head of cohesive soil stratum

The invention relates to a method for judging the mud cake formation risk of a shield cutter head of a cohesive soil stratum, which comprises the following steps of: carrying out a cohesive soil test, and measuring the adhesion strength and the shear strength of a soil body; according to a test result, obtaining an adhesion strength rule and a shear strength rule; according to engineering construction parameters and construction stratum soil mass properties, shield cutter head contact stress is obtained through calculation, soil bin pressure is determined, and the adhesion strength f and the shear strength tau are calculated in combination with the soil mass moisture content, the cutter head temperature and the action time; the mud cake forming risk of the cutterhead is judged according to the size relation between the adhesion strength f and the shearing strength tau, when f is larger than tau, the high risk of mud cake forming exists in the cutterhead, and when f is larger than 0.5 tau and smaller than tau,