Modelling time-dependent behaviour of Murro test embankment
Modelling time-dependent behaviour of Murro test embankment
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DOI：
10.1680/geot.8.r027
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发表时间：
2010-10-01
期刊：
影响因子：
5.8
通讯作者：
Yin, Z-Y.
中科院分区：
文献类型：
--
作者：
Karstunen, M.;Yin, Z-Y.
本文研究了芬兰穆罗试验路堤随时间变化的行为。该路堤建于 1993 年，建在软质天然粘土沉积物上，具有大应变各向异性、破坏性和粘性。该研究基于对完整和重构土壤样品进行三轴和土壤计测试的大量实验数据，这些数据揭示了时间对机械性能的影响，包括为研究土壤各向异性和破坏而设计的测试。对结果的解释是在最近开发的弹粘塑性模型 EVP-SCLAY1S 的框架内完成的，该模型用于结合 Biot 固结理论来模拟软土沉积。从测试结果确定模型参数表明该模型可以相对容易地用于实际应用。使用这些参数，进行了二维有限元分析作为大变形分析。计算和测量之间的比较表明，所提出的模型可以令人满意地用于描述结构粘土路堤的时间相关行为。
This paper investigates the time-dependent behaviour of Murro test embankment in Finland. The embankment was built in 1993 on a soft natural clay deposit, which exhibits large strain anisotropy, destructuration and viscosity. The study is based on extensive experimental data from triaxial and oedometer tests on intact and reconstituted soil samples which shed light on the influence of time on mechanical properties, including testing designed for studying soil anisotropy and destructuration. The interpretation of the results is done in the framework of a recently developed elasto-viscoplastic model EVP-SCLAY1S, which is used to simulate the soft soil deposit coupled with Biot's consolidation theory. The determination of model parameters from the test results demonstrates that the model can be relatively easily used for practical applications. Using these parameters, two-dimensional finite-element analyses have been made as large deformation analysis. The comparisons between calculations and measurements demonstrate that the proposed model can be satisfactorily used to describe the time-dependent behaviour of the embankment on structured clay.