As a mass concrete structure,dock lock is often required to be layered to prevent cracking due to excessive temperature stress.But one projects have collapsed after years of operation.Based on the extended finite element method,this paper simulates the crack propagation...MORE As a mass concrete structure,dock lock is often required to be layered to prevent cracking due to excessive temperature stress.But one projects have collapsed after years of operation.Based on the extended finite element method,this paper simulates the crack propagation after the layered pouring surface is damaged.It is ...