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Cast-In-Drilled-Hole (CIDH) piles are commonly used in the construction of bridge structures, and refer to a construction method in which the reinforced concrete piles are cast in drilled holes to predetermined elevations using a heavy wall steel casing to prevent caving.
Cast-in-place pile construction is the method to complete the piles by placing the concrete after installing the reinforced cage to be arranged on site into bore hole. Cast-in-place pile construction has various methods based on drilling method, pile diameter, pile length, etc.