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首页> 外文期刊>Soil Dynamics and Earthquake Engineering >A combination strategy of hollow-closed-wall in-filled trench and elastic bearing for reducing environmental vibration induced by high-speed train
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A combination strategy of hollow-closed-wall in-filled trench and elastic bearing for reducing environmental vibration induced by high-speed train

机译：中空封闭式沟槽与弹性轴承的组合策略可减少高速列车引起的环境振动

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摘要

With the rapid development of high-speed railway (HSR) in China, the problem of environmental vibration induced by HSR train has attracted critical concern. In this paper, a combination vibration reduction (CVR) strategy of hollow-closed-wall in-filled trench (HIT) and elastic bearing (EB) is proposed to decrease environmental vibration induced by HSR train, in which the depth of HIT could be well controlled to benefit the practical construction and economic cost. Based on the multi-body dynamics and finite element theory, HSR environmental vibration system is established and then divided into two sub-models including the 'train-track-bridge' vibration source sub-model and the 'pile-soil' vibration propagation sub-model. The two sub-models are connected via the force balance condition of the pier bottom. The verification of numerical models is conducted by comparing with the empirical formula and the ground data in the references. Then the attenuation law of environmental vibration is analyzed, and the vertical component is shown to be dominant in the HSR environmental vibration. On this basis, numerical simulations are performed to analyze the environmental vibration reduction under three strategies, namely the HIT, EB, and CVR. The results show that the HIT presents a distinct vibration reduction effect in the frequency range above 4 Hz and the vibration reduction becomes more obvious as the HIT's depth increases. However, the depth should be larger than 8 m to satisfy the code requirement; the EB presents an obvious reduction in the frequency range above 8 Hz; the CVR strategy not only further decrease the environmental vibration, but also effectively reduce the HIT's depth. By numerical analysis, the combination strategy of 6 m deep HIT and 2200 kN/mm vertical stiffness EB is recommended in the HSR environmental vibration reduction, which could also satisfy the limit of Chinese railway code.
机译：随着中国高铁的快速发展，高铁列车引起的环境振动问题引起了人们的关注。为了降低高铁列车引起的环境振动，本文提出了空心封闭壁填充沟槽（HIT）和弹性轴承（EB）的组合减振（CVR）策略。受到良好控制，以利于实际建设和经济成本。基于多体动力学和有限元理论，建立了高铁环境振动系统，然后将其分为两个子模型，分别是“火车-轨道-桥梁”振动源子模型和“桩-土”振动传播子模型。 -模型。这两个子模型通过墩底的力平衡条件连接。通过与经验公式和参考文献中的地面数据进行比较来进行数值模型的验证。然后分析了环境振动的衰减规律，并指出了垂直分量在高铁环境振动中占主导地位。在此基础上，进行了数值模拟，以分析HIT，EB和CVR这三种策略下的环境振动减少。结果表明，HIT在4 Hz以上的频率范围内表现出明显的减振效果，并且随着HIT深度的增加，减振效果变得更加明显。但是，深度应大于8 m，以满足编码要求; EB在8 Hz以上的频率范围内明显降低; CVR策略不仅可以进一步减少环境振动，而且可以有效降低HIT的深度。通过数值分析，在高铁环境减振中，建议采用6 m深的HIT和2200 kN / mm的垂直刚度EB的组合策略，这也可以满足中国铁路法规的要求。

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