Multiplayer composite seepage prevention structure applicable to urban rivers

The invention discloses a multilayer composite seepage prevention structure applicable to urban rivers. The multilayer composite seepage prevention structure comprises a lower transition cushion layer, a geotechnical inverted filter layer, a geotechnical material main seepage prevention layer, an upper transition cushion layer and a cover scour prevention layer which are arranged on a river bed from bottom to top. The multilayer composite seepage prevention structure has the advantages that the river bed is high in scour resistance owing to the multilayer composite seepage prevention structure, the problem that seepage prevention requirements under flowing water conditions cannot be met by existing seepage prevention structures can be solved, and solution is provided for meeting requirements on multiple seepage prevention and flood protection functions of rivers; the geotechnical inverted filter layer is arranged under the geotechnical material main seepage prevention layer, so that effects of protecting the geotechnical material main seepage prevention layer and preventing seepage, deformation and destruction of the geotechnical material main seepage prevention layer can be realized; the various layers are made of commonly used materials, the appropriate materials can be selected according to different conditions of the rivers, and purchasing and construction can be facilitated; the various layers are made of the flexible materials, and accordingly the multilayer composite seepage prevention structure is good in structural stability; the cover scour prevention layer is made of permeable porous materials, and accordingly favorable underwater plant growth and animal habit places can be provided.