Grouting diffusion plugging three-dimensional model device under water-rich condition and test method

The invention provides a grouting diffusion plugging three-dimensional model device under a water-rich condition and a test method, and relates to the field of geotechnical engineering.The grouting diffusion plugging three-dimensional model device comprises a test box, an upper water permeable plate and a lower water permeable plate are arranged in the test box in a spaced mode, and the space between the upper water permeable plate and the lower water permeable plate is used for being filled with soil; the grouting assembly is arranged at the bottom of the test box in a penetrating manner and is used for grouting the test box from bottom to top; the water injection assembly penetrates through the sealing cover of the test box and injects water into the test box; the wastewater component penetrates through the bottom of the test box and is used for collecting wastewater; the detection assembly comprises information acquisition equipment and a water flow meter, a grouting flow meter, a grouting pressure gauge a