| Because of the continuous development of urban roads in our country,the urban tunnels constructed by blasting method also increase.However,the vibration effect caused by tunnel blasting will have some influence on the surrounding buildings.Therefore,controlling and preventing the damage of tunnel blasting to buildings has become an important topic of the tunnel engineering.In this paper,the construction of tunnel blasting in Jiangbei District of Chongqing Wan Xing Lu as the research background.By means of field monitoring,theoretical analysis and numerical simulation,the effects of blasting on adjacent anti slide piles are studied.The main contents of this paper are as follows:(1)The finite element calculation model of tunnel blasting at different locations is established by using Midas.GTS finite element software.The influence of tunnel blasting on the vibration velocity of sliding pile and its changing law are analyzed.(2)By comparing the field monitoring data with the numerical simulation results,the safety distance between the anti slide pile and tunnel blasting is obtained under the condition.(3)According to the construction principle of tunnel blasting vibration,combined with field practice and numerical analysis results.Measures to reduce the effect of city tunnel blasting on pile foundation are put forward. |
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