Sampling and shear strength testing method for keeping undisturbed structure of waste residue soil body

The invention provides a sampling and shear strength testing method for keeping an undisturbed structure of a waste residue soil body, belongs to the technical field of geological engineering waste residue soil testing, and aims at adopting a copolymerization material as a sealing material in the sampling process, preventing the original structure of the undisturbed soil from being disturbed in the sampling process and the transportation process, enabling the unsealing process to be simpler and more feasible, and improving the testing efficiency. The method comprises the following steps: preparing an acrylamide-acrylic acid copolymer from a mixture consisting of pure water, glycerol, acrylamide and acrylic acid in a mass ratio of 1: 2: (4-8): (2-4) under a water bath heating condition; a waste residue soil plane with a preset size and shape is selected to be leveled at the slope surface gentle part of the waste residue soil slope; an adhesive injection tape is delimited on the leveled waste residue soil plane