Low cohesion and poor scour resistance make sandy bank slopes in the lower reaches of rivers susceptible to instability and damage. Soil stabilization is one of ecological flexible bank protection technologies, which not only pays attention to the function of flood control, but also pays attention to the function of ecological and environmental protection. This study conducts a series of mechanical property test, nuclear magnetic resonance test (NMR), computed tomography test (CT), and scanning electron microscope test (SEM) on hydrogel-stabilized sand to highlight the link between pore-scale and macroscopic properties. The results of the mechanical tests indicate a linear increase in unconfined compressive strength, flexural strength, tensile strength, and cohesion with increasing hydrogel content. Conversely, the internal friction angle appears to be less impacted by fluctuations in hydrogel content. The specimen with 1 % hydrogel content exhibited a multi-peak T2 curve, and the specimens with 2 %, 3 %, and 4 % hydrogel contents share a similar three-peak spectrum shape. The start-end relaxation times, peak widths, and amplitudes of peaks decreased with the increase in hydrogel content. As the hydrogel content increased, there was a progressive increase in accumulated porosity, ranging from 1.0 % to 3.5 %. As the hydrogel content increased, the volume occupied by the hydrogel increased, and the spatial distribution of the hydrogel became more homogeneous as the hydrogel content increased and more hydrogel-sand aggregates formed. The number, length, and width of cracks decreased significantly and accordingly.

来源平台：CONSTRUCTION AND BUILDING MATERIALS