| 摘要 |
The present invention relates to a nonpoint-pollutant treatment apparatus for bridges, which has a separate space to enable sludge contained in rainwater to be deposited; prevents deposited sludge from being refloated; and can quickly discharge rainwater through a minimum purification process, if the amount of flowing-in rainwater exceeds a certain level. According to the present invention, the nonpoint-pollutant treatment apparatus for bridges comprises a main body, an inlet part, an outlet part, a partition part, a multi-stage filter part, an overflow part, a refloating prevention part, and a discharge pipe. The main body is installed on one side of a bridge in a detachable manner. The inlet part is formed on the top surface of the main body in order to enable rainwater to flow into the main body. The outlet part is formed on the bottom surface of the main body and discharges rainwater in the main body to the outside. The partition part has an opened top surface and a closed side surface; is prepared on the inner bottom surface of the main body and connected to the outlet part; and is separated from the inner side surface of the main body in order to form a deposition space. The multi-stage filter part has a closed top surface and perforated side and bottom surfaces, and is prepared on the top surface of the partition part. The overflow part has a closed bottom surface and at least a perforated side surface, and is prepared on the top surface of the multi-stage filter part. The refloating prevention part comprises: a first slope part formed to slope down from the exterior of the multi-stage filter part or the overflow part towards the main body; and a second slope part formed to slope down from the inner side surface of the man body towards the multi-stage filter part. The discharge pipe is formed to penetrate at least the overflow part and the multi-stage filter part; has a perforated side surface in a region contacting the overflow part in order to guide the discharge of rainwater; and has a closed surface in a region contacting the multi-stage filter part in order to block the inflow of rainwater. The first and second slope parts are prepared at different heights, and partially overlap each other. |
