Numerical experiments study on loss of prestress change of anchorage cable

By the use of the method of numerical simulation, prestress and loss of prestress change of anchorage cable is researched. The results of research indicate that after anchorage cable is locked, prestress change of anchorage cable is caused by the interaction of anchorage cable and anchored medium. Prestress change of anchorage cable undergoes decrease、raise and steady phases and the primary reason of loss of prestress is the creep of rock mass near outer anchor. Simultaneously improvement of loss of prestress is contrasted in the case of extra prestress and compensation tension. A reference can be provided for the engineering design and theoretical study.