| 摘要 |
The purpose of the present invention is to provide a device for preventing one end of a drain pipe installed when building a concrete structure such as a concrete retaining wall and the like. To achieve this, the present invention provides a module keeping a drain pipe open, including: a closing plate arranged between a mold for forming a retaining wall when building a concrete retaining structure and the ground in the rear side of the retaining wall and closing an opening in one side of the drain pipe; a circumferential cap formed in the closing plate to cover the outer circumference of one side of the drain pipe; and an insertion cap inserted into an inner pipe in one side of the drain pipe. |
