Abstract This paper presents the performance of geofoam-filled trenches in mitigating of ground vibration transmissions by the means of a full experimental study. The results are interpreted in the frequency domain. Fully automated 2 D and 3 D numerical models are applied to evaluate the screening effectiveness of geofoam-filled trenches in the active and passive schemes. Experimental results are in good agreement with the prediction of numerical modelling. The validated model is used to investigate the influence of geometrical and dimensional features on the trench. In addition, three different systems including single, double and triangle wall obstacles are selected for analysis, and the results are compared for various situations. The parametric study is based on complete automation of the model through coupling finite element analysis software (Plaxis) and Python programming language to control input, change the parameters, as well as to produce output and calculate the efficiency of the barrier. The results show that the depth and the width of approximately 1 λ r and 0.2 λ r , respectively are enough to reach the acceptable amount of efficiency for the active isolation for all three systems. For the passive scheme, the role of depth can be ignored for the single and double wall barriers, while depth plays a significant role for the triangle wall system.

中文翻译：

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薄泡沫屏障作为减振措施的实用性的完整实验和数值模拟

摘要 本文通过完整的实验研究，介绍了土工泡沫填充沟槽在减轻地面振动传输方面的性能。结果在频域中解释。应用全自动 2D 和 3D 数值模型来评估土工泡沫填充沟槽在主动和被动方案中的筛选效果。实验结果与数值模拟的预测非常吻合。验证模型用于研究几何和尺寸特征对沟槽的影响。此外，还选取了单壁、双壁和三角形壁障三种不同系统进行分析，并对各种情况下的结果进行了比较。参数化研究是基于模型的完全自动化，通过耦合有限元分析软件（Plaxis）和Python编程语言来控制输入、改变参数，以及产生输出和计算屏障的效率。结果表明，分别约为 1 λ r 和 0.2 λ r 的深度和宽度足以达到所有三个系统的主动隔离的可接受的效率量。对于被动方案，对于单双墙障碍可以忽略深度的作用，而对于三角墙系统，深度起着重要的作用。结果表明，深度和宽度分别约为 1 λ r 和 0.2 λ r 足以达到所有三个系统的主动隔离可接受的效率量。对于被动方案，对于单双墙障碍可以忽略深度的作用，而对于三角墙系统，深度起着重要的作用。结果表明，深度和宽度分别约为 1 λ r 和 0.2 λ r 足以达到所有三个系统的主动隔离可接受的效率量。对于被动方案，对于单双墙障碍可以忽略深度的作用，而对于三角墙系统，深度起着重要的作用。