Compression and Creep of Venice Lagoon Sands
Compression and Creep of Venice Lagoon Sands
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DOI：
10.1061/(asce)gt.1943-5606.0000696
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发表时间：
2012-01
影响因子：
3.9
通讯作者：
A. Sanzeni;A. Whittle;J. Germaine;F. Colleselli
中科院分区：
文献类型：
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作者：
A. Sanzeni;A. Whittle;J. Germaine;F. Colleselli
摘要进行了一个实验室测试程序，以评估一维（1D）的压缩和蠕变性能的完整的砂（和粉砂）样品从深钻孔在Malamocco入口威尼斯泻湖。试验采用恒速应变固结仪进行，并包括用于修剪冷冻样品和测量解冻和背压饱和期间应变的特殊程序。试样具有可变的细分数范围从6到21%和云母含量范围从1到10%。结果表明，蠕变速率系数与压缩指数、膨胀指数与云母含量之间存在较强的相关性。在所有的测试中的压缩行为很好地描述了一个非线性压缩模型，具有独特的极限压缩曲线和可变的过渡参数，反映了细粉和云母含量。在不同围压下进行的蠕变试验也很好地代表了一个简单的两参数模型。
AbstractA laboratory test program was conducted to evaluate the one-dimensional (1D) compression and creep properties of intact sand (and silty-sand) samples from a deep borehole at the Malamocco Inlet to the Venice Lagoon. The tests were performed with a constant rate of strain consolidometer and included special procedures for trimming the frozen samples and measuring strains during thawing and backpressure saturation. The specimens had variable fine fractions ranging from 6 to 21% and mica contents ranging from 1 to 10%. The results confirmed that there is a strong correlation between the creep rate coefficient and the compressibility index and between the swelling index and mica content. The compression behavior in all tests is well described by a nonlinear compression model with a unique limiting compression curve and a variable transition parameter that reflects the fines and mica content. Creep tests performed at different confining pressures are also well represented by a simple two-parameter model.