The h-type anti-slide pile (h-pile) plays a crucial role in mitigating soil-rock mixture slope (SRMS) instability. Despite its significance, the limited availability of research outcomes has constrained the practical application of h-piles for SRMS reinforcement. This study employs three centrifuge model tests to investigate the behavior and performance of h-pile-reinforced SRMS under rainfall conditions. We systematically describe the response of earth pressure on the pile side and behind the pile, bending moment along the pile, and pore water pressure at the slope toe and pile side. This elucidates the evolution of soil arching for h-piles under rainfall conditions. The results reveal that rainfall duration influences the distribution pattern of earth pressure on the pile side, while the distribution pattern of bending moment for the h-pile remains unaffected. Additionally, the soil arching pattern between piles demonstrates joint arching, involving the combined action of frictional arching and end-bearing arching. The evolution process of soil arching between piles under rainfall conditions gradually dissipates from bottom to top and from far to near.

Slopes with soil-rock mixtures (SRMs) are widely found in southwest China. Because of the strong tectonic geological activity in the region, seismic geological disasters occur frequently. A series of large-scale shaking table tests were performed on model slopes with different rock contents to investigate the effect of the rock content on the dynamic response and failure characteristics of SRM slopes. The test results showed that the acceleration amplification factors in the horizontal direction (AAF-X) of the SRM slopes under sine -wave excitations of varying input frequencies differed significantly because of the differences in the dynamic properties of geological structures. The AAF-X values for the SRM slopes with different rock contents under El Centro wave excitations with varying amplitudes also differed, and the magnitude of the acceleration amplification effect is related to the degree of damage deformation of the slopes. The AAF-X and peak ground displacement (PGD) of the model slopes under seismic excitations were used to analyze the damage evolution of the SRM slopes with different rock contents. For the SRM slopes with rock contents of 20 % and 40 %, the damage deformation process can be divided into three stages: an elastic stage (0.6 g). In contrast, the damage deformation process of the model slope with a rock content of 60 % can only be divided into two stages: an elastic stage (<0.6 g) and a plastic stage (0.6-0.8 g). These findings have considerable significance for the stability evaluation of SRM slopes for disaster prevention and mitigation during earthquakes.