Answer to Question #238318 in Civil and Environmental Engineering for Chella

Question #238318

25. What are the problems associated with prestressed concrete piles (Daido)?


1
Expert's answer
2021-09-17T02:35:53-0400


The origin of Daido piles comes from Japan where these prestressed concrete piles are used as replacement plies. Holes are pre-formed in the ground and Daido piles are placed inside these pre-formed holes with subsequent grouting of void space between the piles and adjacent ground. However, in Hong Kong Daido piles are constructed by driving into ground by hammers instead of the originally designed replacement method. Since the installation method of Daido piles is changed, construction problems like deformation of pile tip shoes, crushing of concrete at pile tip etc. occur. Reference is made to B. W. Choy (1993)


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