Analysis on the Impact of Blasting Excavation within the Protection Range of a Reservoir Dam on Dam Structural Safety
When the blasting excavation construction is close to the dam,the blasting vibration will inevitably have a certain degree of adverse impact on the structural safety of the dam.Analyzing the impact range and degree of blasting vibration on the safety of dam structures,and providing reasonable suggestions for blasting excavation schemes and dam safety protection during construction are important issues that must be considered in design and construction.Based on the construction of a new water intake and tunnel on the left bank within the protection range of Nanyi Reservoir Dam,a numerical model of the blasting vibration response of a concrete gravity dam is established.The stress characteristics and vibration speed of the dam during the blasting vibration process are analyzed,and the impact of blasting vibration on the safety of the dam structure is evaluated,which has certain reference value for similar blasting excavation projects.
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