An object of the present invention is to provide a drainage destination and depending on the constructions design the runoff to take advantage of the slope of the ground intentionally mutable Anti-weed structure of rain water due to rainfall. A Anti-weed structure 100, longitudinal (X) side which is formed so as to integrally continuous respectively to all the respective upper and lower ends in the width direction (Y) each left and right edges of the rectangular sheet body edge first strip, the side edges the second piece, and a plurality of Anti-weed sheet a having a side edge third piece is, inter Anti-weed sheets mutually adjacent in vertical and horizontal directions in the array direction (X and Y-) (e.g., as A1 A2, A2 and A3, A3 and are joined to each other in the A4, etc.), between the Anti-weed sheet mutually adjacent to each other in the vertical and horizontal directions in the arrangement direction (X and Y) (for example, A1 and A2, A2 and A3, A3 and A4 junction 102b of the back side of the respective side edge piece of opposing, etc.), a rectangular-shaped sheet projection height thickness direction upward of more than 10mm of body protrudes, and orthogonal to the array direction (Y) to the direction (X) It is formed so as to extend.FIELD 1【課題】降雨による雨水の排水先や流出量を施工者の設計次第で地盤の勾配を活用し意図的に変更可能な防草構造体を提供する。【解決手段】防草構造体100は、矩形状シート本体の長手方向(X)各上下端と幅方向(Y)各左右端のすべてにそれぞれ一体に連続するよう形成された側縁第1片、側縁第2片、及び側縁第3片を有する複数の防草シートAが、縦横それぞれの配列方向(X及びY)に隣り合う防草シート相互間(例えば、A1とA2、A2とA3、A3とA4など)で互いに接合されており、縦横それぞれの配列方向(X及びY)に隣り合う防草シート相互間(例えば、A1とA2、A2とA3、A3とA4など)の対向する各側縁片の裏面同士の接合部102bが、矩形状シート本体の厚み方向上方に10mm以上の突出高さで突出し、かつ配列方向(Y)に直交する方向(X)へ延在するように形成されている。【選択図】図1
