| 摘要 |
PROBLEM TO BE SOLVED: To prevent the mixture of air into fresh concrete already filled when filling the fresh concrete into a steel pipe to construct CFT structure.SOLUTION: A concrete placement method includes inserting a pipe into the steel pipe erected in the vertical direction through the upper side of the steel pipe, and filling the fresh concrete into the steel pipe through the lower end side of the steel pipe via the pipe while holding the state of inserting the lower end of the pipe into the fresh concrete already filled in the steel pipe. Herein, the pipe is a cylindrical steel pipe, and air vent openings are formed in the peripheral wall of the pipe at positions on the further upper side than a portion to be inserted into the fresh concrete already filled into the steel pipe. |
