During the construction process of slurry shield tunneling,it is particularly important for the stability of the excavation surface whether the mud in the excavation chamber penetrates into a film or not.This article focuses on the current research status of mud infiltration film-forming,dividing mud into two types:viscous mud and granular mud.The research progress of the two types of mud infiltration film-forming laws is analyzed,and it is proposed that the main factors affecting mud film formation are the viscosity enhancers used to increase mud viscosity and the particle materials added to mud.The main factors affecting the infiltration and film formation of viscous mud in the formation are the rheological properties of the mud and the particle size of bentonite in the mud,while the main factors affecting the infiltration and film formation of granular mud in the formation are the particle size distribution of the mud,the particle size and content of the particulate material added to the mud.This study can provide reference for the mud configuration during the excavation process of mud water shield tunneling in different strata,and also provide research prospects for the scientific issues of mud infiltration and film formation.
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