RUBBER DAM AND METHOD OF APPLICATION THEREOF

摘要

A rubber sheet is formed in a bag shape, and a seam portion ofthe bag-shaped rubber sheet is fixed to a summit portion of anoverflow dam. When the bag-shaped rubber sheet is expanded, arubber dam is raised, thereby damming up water and adjusting theamount of running water. Next, when the bag-shaped rubbersheet which has been expanded is contracted and collapsed, therubber sheet is supported by pipes, which extend substantiallyhorizontally from the summit portion of the overflow dam towardthe downstream side at a predetermined distance from each other.For this reason, the rubber sheet hangs down with its own weightand with the weight of water running downstream so as to droopdown between the pipes. As a result, a rubber dam that does notbulge at the downstream side is obtained.