Research on the influence of isolation ditches on the vibration velocity of ground particles under explosive action
Vibration-isolating slot is widely used in blasting engineering because of its good energy dissipation effect,low cost and easy construction.In order to ensure the safety of laboratory buildings that need to carry out explosion experiments and surrounding supporting facilities,it is necessary to build a ring isolation ditch around the explosion source.Based on the above background,this paper carried out the numerical simulation of the isolation effect of the isolation ditch set around the explosion test pit based on LS-DYNA software.The influence of different parameters on the isolation effect of the vibration-isolating slot was explored by changing the parameters such as the amount of charge,the depth and width of the isolation ditch,the type of filling material in the isolation ditch and the type of backfill soil in the experimental pit.On the basis of the Saldorfsky's formula,the width and depth of the isolation ditch were considered,and the engineering fitting formula of the peak particle vibration velocity after the isolation and energy dissipation of the isolation ditch was given.The result provides reference for the construction of engineering protection explosion laboratory and similar projects.
vibration-isolating slotnumerical simulationisolation and energy dissipationparticle vibration velocityformula fitting
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