Numerical Simulation Of The Impact On Hongshi Dam Due To Blasting Excavation Of Stilling Pool

Blast, as a key tool, has been widely used in a variety of geotechnical engineering. The effects it comes along with could be favored or adverse. The impact of the explosion, in the use of the vibration of foundation reinforcement, as well as geological exploration, is beneficial. While, somewhere on the implementation of the blast, the explosion will certainly be able to through the media to spread around, it will have a negative impact around the building. Such a negative impact on the prevention and elimination is an important issue that engineer must face.The stilling pool of Hongshi hydropower station is been excavated by means of blast. And it will cause a certain degree of hidden dangers. The blasting should be controlled. The safety measure and the safety criterion are different in some continuation project at home and abroad. Because of different destroy mode between constructions and electromechanical devices, only the vibration velocity can not be used as the safety criterion. To fully solve the dynamic effects of blasting seismic safety evaluation, it must base on structural dynamics theory and the characteristics the structure own to determine the structure of the dynamic response, deformation, dynamic stress and its distribution.The article combines the detonation wave theory and explosive expansion of the cavity theory (triangle pulse). In order to simulate the shock effect that the shock wave brings about, transience method of ANSYS is used. The works of this thesis include three parts as followed:(1) Systematically introduced the blasting vibration theories, and investigated a common relationship between peak speed of the blast ground and blasting parameters. The relational expression is fitted with the experimental date.(2) Using the structural dynamics theory, the law of shock wave dissemination is revealed. In order to facilitate the implementation of the result, based on the traditional single parameter theory and the numerical simulation, the maximum velocity of the dam crest has been figure out.(3) In this thesis, the four regions of stress concentration which should be under key monitoring have been figure out. The security of blasting test has been proved. And some suggestions about the safety of he dam are put forward.