Consolidation behavior of soft deposits considering the variation of prefabricated vertical drain discharge capacity
Consolidation behavior of soft deposits considering the variation of prefabricated vertical drain discharge capacity
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DOI：
10.1016/j.compgeo.2014.08.006
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发表时间：
2014-10
影响因子：
5.3
通讯作者：
Deng Yuebao;Liu Gan-bin;M. Lu;K. Xie
中科院分区：
文献类型：
--
作者：
Deng Yuebao;Liu Gan-bin;M. Lu;K. Xie
本文主要研究在模拟软土地基预制垂直排水固结过程中，排水能力变化的原因和方法。首先，对现有的放电容量研究进行了总结和讨论。这些研究得出结论：PVD在现场的放电容量随围压和固结时间的变化而变化。其次，提出并比较了一系列同时考虑流量随地基深度、固结时间或两者同时变化的解析解。描述了这些解决方案和新引入的参数的应用。在此基础上，分析了PVDS地基处理工程实例，从室内试验中获得了与时间相关的放电容量参数。经典解与新方法的比较表明，固结理论中考虑流量变化的固结理论能更好地预测PVD加筋地基的固结过程。
This paper is primarily focused on why and how to consider the varied discharge capacity during simulations of consolidation via prefabricated vertical drains (PVDs) for soft soil deposits. First, the existing studies regarding discharge capacity are summarized and discussed. These studies conclude that the discharge capacity of PVDs at sites vary with the confining pressure and consolidation time. Next, a series of analytical solutions that consider the variation of discharge capacity with ground depth, consolidation time or both simultaneously are presented and compared. Applications of these solutions and of the newly introduced parameters are described. Then, a well-documented case history on ground treatment with PVDs is analyzed, in which the parameters related to the time-dependent discharge capacity were obtained from laboratory tests. A comparison between a classical solution and the newly presented method indicates that consideration of the varied discharge capacity in the consolidation theory can better predict the consolidation process of PVD-improved ground.