| 摘要 |
PROBLEM TO BE SOLVED: To eliminate the need for troublesome work of inserting a tubular member into a water introduction member in a core hole and to facilitate construction of a tubular member and a water introduction member to the inside of a core hole.SOLUTION: In a drain structure for draining water in gravel in back face or underside of a concrete wall, a core hole 11a that penetrates a concrete wall 11 and that has an open base end side and a tip side closed with gravel 12 is drilled in the concrete wall, and a tubular member 13 with open both ends and the outer peripheral surface to which rubber ring members 16 and 17 are fitted is inserted on the base end side of the core hole. A water introduction member 14 for introducing water in gravel in a back face of the concrete wall into the tubular member is provided, and the tip of the tubular member is connected with the base end of the water introduction member so as to be communicatively connected, and the tip of the water introduction member is located in the tip of the core hole. When the tubular member into which the ring members are fitted is inserted into the core hole, the ring members are interposed between the tubular member and the core hole in an elastically deformed and compressed state, so that the tubular member is positioned and fixed in the core hole.SELECTED DRAWING: Figure 1 |
