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Consolidation Analysis with Application of Constant Rate of Strain Consolidation Tests for Vietnam Clays

机译:越南粘土应变整合试验恒定率的合并分析

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摘要

Constant rate of strain (CRS) consolidation testing has specific advantages over the standard incremental loading (IL) consolidation testing. The first advantage is shortening testing period of 1-2 days compared to 7-10 days for the standard; the second one is that testing data are recorded automatically and continuously for the ease of determination of consolidation yield stress. Moreover, pre-consolidation pressure from CRS is larger than that resulted from IL, so many researchers have not recognized the application of CRS into the routine design of consolidation problems. Therefore, there has been little effort and application of CRS in the consolidation analysis into the soft ground improvement especially in Vietnam. There has been no standard for CRS applicable in the soft ground improvement design in Vietnam. The paper is focused on characterization of Vietnam soft clay deposit with application of the results of constant rate of strain consolidation tests in order to achieve the input parameters for consolidation analyses. Total 4 PVD and surcharge construction sites with the undisturbed samples taken by stationary hydraulic piston sampler are investigated in this study. The characterized input data are utilized in consolidation analyses by finite difference method (FDM) in order to determine the behavior of Vietnam soft clay deposit. A comparison of the monitored data to the calculated data from a new finite difference code which has been developed by the author is presented.
机译:恒定速率(CRS)固结测试与标准增量负载(IL)合并测试具有特异性优势。第一个优点是缩短测试期为1-2天,而标准的7-10天;第二个是测试数据是自动和连续地记录的,以便易于确定合并产量应力。此外,来自CRS的预整合压力大于IL所产生的压力,因此许多研究人员尚未认识到CRS在整合问题的常规设计中的应用。因此,特别是在越南的柔软地改善中,CRS的努力和应用CRS。在越南软体地改善设计中,CRS没有任何标准。本文专注于越南软粘土沉积物的表征,应用恒定应变固结试验结果的结果,以实现合并分析的输入参数。在本研究中研究了共有4个PVD和附加额度建筑工地,并在本研究中研究了固定液压活塞采样器的未受干扰样品。通过有限差分法(FDM)在合并分析中使用所表征的输入数据,以确定越南软粘土矿床的行为。提出了由作者开发的新的有限差分代码中所计算数据的受监视数据的比较。

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