| 新建隧道上跨既有隧道爆破振动响应研究 |
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| 作者单位： | ;1.辽宁工程技术大学爆破技术研究院 |
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| 摘 要： | 以福平铁路新鼓山隧道开挖工程为例,采用FLAC3D软件对其下部既有隧道的振动响应进行了模拟。将MATLAB与FLAC3D软件联合应用,以爆破作用下岩石模拟振动信号与实际监测信号的误差作为适应度函数,采用PSO算法优化反演出无规律爆破参数和岩石振动阻尼参数,实现模拟参数的自适应选取,解决实际模拟中参数难确定的问题。实际结果表明,上述MATLAB-FLAC3D结合的方法是可行的,不仅可以研究既有隧道对上跨隧道爆破的振动响应,还可以显著提高岩体爆炸效应数值模拟结果的精度,实现隧道振动响应的预测。
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| 关 键 词： | 上跨隧道 爆破振动 数值模拟 振动预测 |
Study on blasting vibration response of the existing tunnel crossing the new tunnel |
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| Affiliation: | ,College of Engineering Blasting,Liaoning Technical University |
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| Abstract: | Taking the excavation project of the new Gushan tunnel in Fuping railway as an example,the vibration response of the existing tunnel was simulated by FLAC3D software.MATLAB and FLAC3D software were used simulate the vibration signal and the actual monitoring signal under blasting as the fitness function.PSO algorithm was used to optimize the inversion parameters and rock vibration damping parameters,the adaptive selection of simulation parameters was realized and the problem of difficult to determine the parameters in the actual simulation was solved.The actual results showed that the method of MATLAB-FLAC3D combination was feasible.It can not only study the vibration response of the existing tunnel to the tunnel blasting,but also can improve the accuracy of numerical simulation results of rock mass explosion and realize the tunnel vibration response prediction. |
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| Keywords: | crossing tunnel blasting vibration numerical simulation vibration prediction |
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