Research And Application Of Blasting Vibration Effect On Building Foundation

For a long time,in the blasting process,Blasting Safety Regulations(GB6722-2014)in calculating Sadove empirical formula of vibration velocity of blasting under the action as the only standard of evaluation of building effect during the blasting process,in the implementation of engineering practice,we found that Sadove empirical formula as the only way to compute the buildings vibration.But sometimes because of the terrain the complexity and some other conditions and even errors in calculation accuracy,the empirical formula has been far from satisfying our requirements,few people used it for the study of medium coupling,numerical simulation and empirical formula.It can be used in practical engineering.Therefore,it is necessary to combine the two methods to study the safety of the vibration response of buildings under blasting action.We use SA Tao Minkowski formula,District of Tongliang Automobile Industrial Park building foundation in the blasting effect,the peak vibration velocity was predicted by numerical simulation of blasting vibration in response under the action of LS-DYNA on building foundation,at the same time according to the numerical simulation results of sadaovsky formula correction.A construction site in Banan after the peak vibration velocity of blasting under the building foundation test,were tested for 18 kg,25kg,detonation quantity 30 kg,vibration velocity of 100 meters of the building foundation,and the use of LS-DYNA in three cases of field test numerical simulation.Finally,origin is used to compare the results of the four formulas: empirical formula,field test,numerical simulation and correction of empirical formula.After comparison,it is found that the coincidence between numerical simulation and field test is higher,and the result of numerical simulation is better than the result of empirical formula.Through research and analysis,draw the following conclusions:(1)The calculation formula of blasting vibration velocity smaller than the ratio numerical simulation and field test results,so the construction of the party for economic benefit,accelerate the construction date,is likely to be calculated according to the empirical formula as a result of the increase of dosage.But the actual vibration velocity to calculate the ratio formula results to a large,so with the dosage increased,the actual vibration velocity of vibration velocity is likely to exceed the prescribed standards of the building,further may cause accidents.(2)The results calculated by LS-DYNA are similar to the actual results,so it is necessary to combine the LS-DYNA with the empirical formula in engineering practice,so as to better guide the practical engineering problems.(3)The modified empirical formula has significant linear regression and high reliability,which can be applied to a certain extent.