Failure mechanism and stability analysis of bank slope deformation under the synergistic effect of heavy rainfall and blasting vibration

Abstract

Underwater drilling blasting technique is often adopted to clear away the obstructed reef and dredge-cut in the mountainous waterway dredging engineering. However, the vibration of the underwater blasting and excavation of the riverbed has a certain influence on the stability of bank slopes. Combined with the partial bank collapse phenomenon in the waterway regulation project between two dams in the Three Gorges reservoir area, the change of pore water pressure of unsaturated soil under heavy rainfall and the increase of permanent displacement of soil under blasting vibration in the reservoir area are discussed. This paper explains the weakening effect of rainfall infiltration and blasting vibration on the stability of the bank slope. By studying the law of slope failure deformation under the separate action and coupling action, it is found that rainfall infiltration promotes the increase of slope permanent displacement and the blasting vibration enlarges the infiltration area of the soil, which demonstrated the accelerated failure mechanism of the rainfall-blasting slope.

Study on Three-Dimensional Dynamic Stability of Open-Pit High Slope under Blasting Vibration

“…On the basis of previous research results, Deng and Chen comprehensively discussed the blasting excavation and stability control technology of ultrahigh and steep rock slopes in China's hydropower projects and discussed its research progress and limitations [18]. On the other hand, Ma et al studied the weakening of slope stability under the dual effects of rainfall infiltration and blasting vibration [19]. However, these methods only conduct experiments and theoretical analysis on the stability of the slope after blasting and have no effective verification and are limited.…”