Device for measuring vertical permeability coefficient of geosynthetic material

The utility model provides a geosynthetic material vertical permeability coefficient measuring device, and relates to the technical field of geosynthetic material detection, the geosynthetic material vertical permeability coefficient measuring device comprises a fixed base, an inner groove, an outer groove, a water pipe, a positioning structure and a water inlet container, the outer groove is arranged at the middle position of the top end of the fixed base, and a drainage pipe is arranged on one side of the outer groove; a plurality of positioning structures are arranged at the bottom end in the inner groove; the positioning structure comprises a mounting plate and a clamping block, the clamping block is arranged at the bottom end of the interior of the inner groove, the mounting plate is arranged on the outer side of the first fixing plate, the mounting plate is arranged on the outer side of the clamping block in a sleeving mode, and a clamping groove is formed in the mounting plate; according to the utility