| With the rapid development of Chinese transport, the city tunnel project will be more and more. Due to restrictions engineering conditions, a large part of the tunnel which require the use of blasting method to carry out, blasting vibration effect is likely to endanger the safety of the surrounding buildings or structures. So, how to predict and control the effects of blasting vibration to protect the safety of the building or structure has become an important topic in the current tunneling and blasting engineering problems to be solved.(1) the use of finite element software Midas.GTS, finite element model for a different location in the same horizontal tunnel. Simulated pile under 14 different conditions and tunnel centerline horizontal distance tunnel blasting, analyzes the influence of blasting vibration and variation of the pile speeds.(2) the establishment of a tunnel at the same level for the finite element model of different positions, different positions draw pile tunnel blasting vibration velocity peaks corresponding change in the trend, by analyzing and combining the appropriate specifications, obtained under the working conditions blasting and pile a safe distance from the centerline of the tunnel.(3) In the context of the actual condition of the tunnel blasting engineering simulation, combined with simulation results and corresponding impact factor analysis, proposed measures to reduce the city tunnel blasting effect on the pile. |
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