Abstract
Underwater 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.
Highlights
With the vigorous development of inland waterway construction in China, underwater reef blasting engineering presents a trend of large volume, large dosage and long period
When there is a potential landslide in the reef blasting area and heavy rainfall occurs within the construction period, underwater drilling blasting can induce a landslide which poses a great threat to the stability of the reservoir bank
Based on the investigation and numerical simulation of local bank collapse points in the dredged area of the waterway, the stability of bank slope and failure modes of bank collapse were analyzed in this paper, which can provide a theoretical basis for the protection designing of bank collapse and control technology of underwater drilling blasting in the heavy rainfall period
Summary
With the vigorous development of inland waterway construction in China, underwater reef blasting engineering presents a trend of large volume, large dosage and long period. Blasting induced seismic waves as well as heavy rainfall have a damage effect on high-steep slopes or excavation surfaces, especially in joint fissure development and an important effect on rock slope stability (Li et al 2006; Mikos et al 2004; Panek et al 2011). Both rainfall infiltration and blasting vibration degradation will weaken the strength of rock and soil mass (Ma et al 2018; Song et al 2016). Based on the investigation and numerical simulation of local bank collapse points in the dredged area of the waterway, the stability of bank slope and failure modes of bank collapse were analyzed in this paper, which can provide a theoretical basis for the protection designing of bank collapse and control technology of underwater drilling blasting in the heavy rainfall period
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
