Behaviour of Winged PVD and the Method for Calculating Its Induced Degree of Consolidation
Behaviour of Winged PVD and the Method for Calculating Its Induced Degree of Consolidation
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DOI：
10.1007/s40891-022-00394-y
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发表时间：
2022-07
影响因子：
2.9
通讯作者：
J. Chai;A. Saito;T. Hino;Takehito Negami
中科院分区：
文献类型：
--
作者：
J. Chai;A. Saito;T. Hino;Takehito Negami
为了减少真空固结工程中预制垂直排水管（PVD）周围明显堵塞的阻碍效应，研究了一种新型的预制垂直排水管（WPVD）的使用方法——翼型预制垂直排水管（WPVD）。首先，提出了一种易于制造和现场安装的新型WPVD结构。有限元分析和室内模型试验结果表明，WPVDs比普通PVDs具有更高的加速真空固结速率的能力，因为它可以减轻明显堵塞的影响。最后，利用等效漏径概念建立了计算WPVD诱导固结度的显式方法（方程）。有限元分析和室内模型试验结果验证了该方法的有效性。
To reduce the obstacle effect of apparent clogging around prefabricated vertical drains (PVDs) in vacuum consolidation projects, a method of using a new type PVD, winged-PVD (WPVD) was investigated. First, a new structure of WPVD has been proposed, which is easier to be manufactured and installed into the field. Then the results of finite element analysis (FEA) and laboratory model tests indicate that WPVDs have higher capacity of accelerating the rate of a vacuum consolidation than that of ordinary PVDs, because they can mitigate the effect of apparent clogging. Finally, an explicit method (equation) for calculating a WPVD induced degree of consolidation has been established using equivalent drain diameter concept. The method has been validated by both the results of FEA and laboratory model tests.