Partition formwork, maintenance method of Doma concrete through the piping, and Doma way retrofitting of concrete through the piping

摘要

PROBLEM TO BE SOLVED: To provide a maintenance method for a partition formwork 1 capable of easily performing maintenance of a tube member 3 penetrating an earthen floor concrete 7 and responding to a future renovation through simple construction process and for piping penetrating earthen floor concrete, and also provide a post-installation method of the piping penetrating earthen floor concrete.SOLUTION: A partition formwork 1 comprises: a frame body 2 partitioning a partial region of an earthen floor concrete 7; and a holder 4 formed at the center of the frame body 2 so as to hold a tube member 3. The surface of the partition formwork 1 is formed to be easily detached from a concrete. The holder 4 has: a tube holding section 42 which holds the tube member 3 and can be separated into 2 or more parts; and multiple wall sections 41 which extend from the tube holding section 42 toward the frame body 2 and whose end portions are engaged with engagement grooves 23 formed inside of the frame body 2.