Quality control of tunnel secondary lining concrete

  title={Quality control of tunnel secondary lining concrete},
  author={Guo Qing-ji},
Secondary lining is the key of the tunnel construction and the last procedure of tunnel structure construction.The secondary lining should be "good outside with real inside".The "real inside" shows inner quality and the "good outside" shows appearance quality.Aiming at the quality defects easy to occur in tunnel secondary lining concrete construction,this paper analyzes the formation reason and makes the pertinence measure which is improved constantly in the construction process,then the… CONTINUE READING