Bank erosion protecting system using embedded roll mat

Abstract

Disclosed is a bank erosion protecting system having a roll mat wound in a roll type and embedded at a top portion of a bank so that when the bank slope starts collapsing, the roll mat may automatically cover the bank slope.

What is claimed is: 
     
         1 . A bank erosion protecting system, comprising:
 a roll mat having one end wound into a rolled portion and embedded in the ground at a top of a bank, wherein the one end of the roll mat wound into the rolled portion is disposed toward a river and another end of the roll mat is disposed at the back of the bank in an unrolled state; and   riprap installed on the roll mat,   wherein when a bank slope collapses, soil supporting the rolled portion of the roll mat is swept so that the rolled portion of the roll mat is unrolled and spread to cover the bank slope, and the riprap also covers the roll mat spread over the bank slope, thereby preventing the bank slope from additionally collapsing.   
     
     
         2 . The bank erosion protecting system according to  claim 1 ,
 wherein the rolled portion of the roll mat is configured so that the other end of the roll mat is rolled upwards.