Optimization of Blasting Vibration Velocity Control Parameters of the Deep Foundation Pit in a Complex Urban Area
Based on the project of Xixiang Station in the second civil construction area of bid 1 of Shenzhen Airport to Qianhai section of Guangzhou—Dongguan—Shenzhen Intercity Rail Transit,the influence of blasting interval time,blasting charge quantity,blasting distance and blasting sequence on the vibration of adjacent buildings was studied from the aspect of vibration velocity by means of numerical simulation and field monitoring.The result shows that,with the extension of the millisecond delay time,the peak value of the vibration velocity of the building shows a law of increasing first and then decreasing,and the fluctuation of the curve of each measuring point is obviously periodical.The blasting charge quantity is positively correlated with the peak value of vibration velocity,having a great influence on the blasting vibration velocity.The blasting distance is negatively correlated with the peak value of vibration velocity.As far as the intermediate initiation and the lateral initiation are concerned,there is a small difference in the peak velocity measured at monitoring position,and their vibration frequency characteristics are basically the same,which has limited difference in the influence on the vibration velocity of the building is small.
subway stationdeep foundation pitblasting designcharge quantityparameter optimization
万方数据
维普
