Problem to be solved: to provide a vegetation base and a method of constructing the vegetation base which can secure the strength of the base part and the surface layer appropriately by using the same and single improvement material, and can simplify the process of the construction of the vegetation base and to construct in the water.The vegetation infrastructure 10 isHaving a base part 11 and a surface part 12Foundation and surface areaThe sludge sludge incineration ash improvement material is mixed with mud at different mixing amounts.Foundation DepartmentThe paper sludge incineration ash amendment material is mixed so that it does not cause subsidence.Surface layerThe paper sludge incineration ash system improvement material is mixed so that the outflow does not occur and the plant can grow.Diagram【課題】同一かつ単数の改良材を用いて基盤部と表層部の各強度を適切に確保し、植生基盤築造の工程を簡略化でき水中での築造も可能な植生基盤およびその築造方法を提供する。【解決手段】この植生基盤１０は、基盤部１１と表層部１２とを有し、基盤部および表層部は、泥土に製紙スラッジ焼却灰系改良材がそれぞれ異なる混合量で混合されて構成され、基盤部は、沈下を起こさない強度となるように製紙スラッジ焼却灰系改良材が混合され、表層部は、流出が起きずかつ植物が生育可能な強度となるように製紙スラッジ焼却灰系改良材が混合されている。【選択図】図１
