根据前人的理论研究及试验成果，基于 FLAC3D 锚固模型及有限元强度折减思想，探讨了加筋锈蚀对锚固支护结构加固性能劣化的影响．结果表明: 随着锚杆锈蚀程度的提高，围岩加锚区变形及围岩塑性区面积增大，其中锈蚀对隧道起拱线处的收敛变形影响明显，位移锈蚀影响度最大可达56．7%; 锈蚀降低了锚固注浆体的粘结力和锚杆强度，且锈蚀对锚固注浆体粘结作用劣化的影响大于对锚杆强度劣化的影响，围岩锚杆最大轴应力锈蚀影响度最大为 11．6%，锚固注浆体最大剪应力锈蚀影响度最大达18．6%．研究结果可为分析海底隧道锚固支护结构的锈蚀劣化提供一定的参考．

According to the previous theoretical and test results,the effect of reinforced corrosion on the reinforce-ment deterioration of anchorage support structure is investigated based on the reinforcement model FLAC3D and theidea of finite- element strength reduction.The results show that both the deformation of surrounding rock- added boltsand the area of plastic zone increase with the evolution of reinforced corrosion of anchor bar,and that the conver-gence deformation at the springing line is more obvious,with its maximum corrosion- induced influence degree beingup to 56.7%. Moreover,it is found that both the bond force of anchorage body and the strength of anchor bar de-crease due to the corrosion and the corresponding deterioration effect on the former is more remarkable,and that themaximum corrosion- induced influence degrees on the axial stress of anchor bar and anchorage body respectivelyreach 11.6% and 18.6%.The research provides some references for analyzing the corrosion- induced reinforcementdeterioration of anchorage support structure of sub- sea tunnels.