Tweet Share

• Send by email

  Send by email

  

  Study on Maintenance System for Cut and Cover Tunnels Showed Signs of Deterioration by Chloride Attack

  While maintaining subway tunnels, some of them already showed signs of deterioration by chloride attack. Therefore, it was investigated the mechanism of deterioration by chloride attack, features of sections of deterioration by chloride attack, methods of determining repair range and appropriate repair method. Furthermore, as a method of determining the detailed repair range, silver nitrate spraying method was developed. Because of examination of the repair method, it was revealed that the combined use of sacrificial anode construction method and surface impregnation method is appropriate depending on the progress by chloride damage. Based on the results, we have been doing construction for 5 years ago. The field test conducted a monitoring survey for 5 years 9 months and carried out a chipping out. This report describes the result of chloride damage investigation, construction status of repair work and monitoring result.

  Recipient :

  Name ^* :

  E-mail address ^* :

  ^* Required fields

  Send   or  Cancel

• Print