| 摘要 |
A drain pipe buried in a bridge slab is provided to prevent impurities from being accumulated in a drain pipe of a conventional bridge by changing a flow of rain water into a super critical flow shape, thereby discharging the rain water smoothly. A drain pipe buried in a bridge slab includes an introduction part(10), a falling part(20), and a rain water moving path(30). The introduction part introduces rain water on the bridge slab. The falling part falls the rain water introduced in the introduction part. The rain water moving path has an iron club shape of a golf club of a slow slope so that the fallen rain water flows in a form of a super critical flow. The fallen rain water is moved to the rain water moving path and is collected in a water collector. The collected water is discharged to a lower portion of a bridge through a discharge part. An interval maintaining material functions as a grating plate by an introduction of the impurities. A plurality of communication holes are formed between the introduction part and the rain water moving path. |
