Effect of Dry–Wet Cycling on the Degradation Characteristics and Mechanisms of Red Sandstone

The physical and mechanical parameters degradation mechanisms of red sandstone in the Mount Wuyi scenic area were studied under action dry–wet cycles. Dry–wet cycle, acoustic wave velocity, water saturation rate, triaxial compression tests conducted, aided by scanning electron microscopy X-ray diffraction testing techniques. study’s results show that cycle effect on is a major factor its microstructural characteristics are significantly affected. P-wave peak strength, elastic modulus, internal friction angle, cohesion decreased, content strain increased, modulus was most sensitive to A cycle’s severely damages integrity sandstone. After 15 cycles, interstitial fillings between skeletal grains dissolved over large area, microfractures interwoven throughout, structure fragmented. cycles mainly manifests dissolution filler, relative calcite as an filler reduced 46.6% after proposed strength decay prediction equation has reference significance for sand conglomerate project. This can provide theoretical support landscape protection rock masses prevention engineering geological hazards.