高铁运行振动对大坝安全性影响特性研究

Research on the Influencing Characteristics of the Running Vibration from High-speed Rail on Dam Safety

随着高铁的建设,由高铁列车运行引发的环境振动问题越来越受到重视。采用理论分析与数值模拟相结合的方法,研究了京张铁路张家口段的东灰场坝在高铁运行振动下的影响,对大坝安全进行评价分析,结论表明在适当的距离下,高铁运行振动对坝体动位移、大坝加速度、动孔压和液化区域、永久变形等影响很小,不会对大坝的安全性造成大的影响。

With the large-scale construction of high-speed rail, the attention has been paid to the environmental vibration problem caused by the operation of high-speed railway trains. The Zhangjiakou ash dam is close to Beijing-Zhangjiakou high-speed railway, the effect on dam safety of the long-term intermittent vibration caused by high-speed trains is evaluated by the combination of theoretical analysis and numerical simulation methods. The results show that the high-speed railway operation has little effect on the dynamic displacement of dam, dam acceleration, dynamic pore pressure and liquefaction area, and permanent deformation when the distance between dam and rail is proper, and will not has a great impact on the safety of dam.