Test device for anti-permeability performance of hydraulic concrete layer and method thereof

The invention discloses a test device for anti-permeability performance of a hydraulic concrete layer and a method thereof. The method includes the steps that 1, upper and lower surfaces of hydraulic concrete drilling core sampling are cut and ground to be flat in the radial direction to obtain a concrete sample through machining; 2, the concrete sample is laterally put into a lateral cylindrical test mold, the lower portion of the lateral cylindrical test mold is in a half-cylinder shape laterally, the upper portion of the lateral cylindrical test mold is cuboid, the lateral curved surface of the sample makes full contact with the lateral cylindrical test mold without a gap, water pressure is applied from top to bottom, the water pressure direction is distributed on the concrete sample in the radial direction, and a lower end opening for water flow permeation is formed in the center of the lower portion of the lateral cylindrical test mold; 3, a layer of sealing material is arranged or poured in the gap betw