STUDY ON THE PRESENT STATE AND REPAIRING METHOD OF The EXISTING RIVER-CROSSING TUNNEL OF HUANGPU RIVER IN SHANGHAI

摘要

After having been operated for 36 years, the deteriorated the concrete of tunnel lining, the corrosion of the steel bar ，the bolt and the state of the leakage water are very severe in the existing Dapu road tunnel. Analysis form the service life, the Dapu road tunnel is in serious aging step now. If the repairing and remodeling are not put into effect thoroughly for the tunnel structure now, maybe the dangers and risks will appear in the tunnel. The history materials and the present state of the existing Dapu road tunnel are investigation. The investigation method and content which often are using are given in this paper. The evaluation method of security and durability for the tunnel lining is also given. In the last the method of repairing and remodeling which are often using in tunnel are introduced briefly.