On the time-dependent behaviour of unsaturated geomaterials
On the time-dependent behaviour of unsaturated geomaterials
复制标题
非饱和岩土材料随时间变化的行为
DOI：
10.1201/b10526-142
复制
发表时间：
2010
期刊：
影响因子：
--
通讯作者：
V. D. Gennaro
中科院分区：
文献类型：
--
作者：
Jean;V. D. Gennaro
本文提出了非饱和岩土材料的速率相关模型。饱和和部分饱和岩土材料的时间依赖性行为的描述的本构律推广的等速度线方法的弹塑性应变硬化的本构律为部分饱和土。该公式包括速率和蠕变效应以及吸力对蠕变的依赖性。它是（De Gennaro et al. 2009;佩雷拉和De Gennaro 2009）中所述工作的延伸。对岩土材料（包括软岩）单液或双液饱和时变特性的本构模型提出了一些看法。实际应用包括模拟（i）受湿度变化影响的浅采石场，（ii）油藏形成或（iii）CO2的地质储存。在这项研究中，制定本构模型。数值预测，包括明确的影响，吸材料的行为的时间依赖性进行比较，可用的实验数据，储油层和采石场粉笔和讨论。
In this paper a rate dependent model for unsaturated geomaterials is presented. The constitutive laws for the description of the time-dependent behaviour of saturated and partially saturated geomaterials generalize the isotach approach to the elastoplastic strain hardening based constitutive laws for partially saturated soils. The formulation encompasses rate and creep effects together with suction dependency on creep. It constitutes an extension of the work presented in (De Gennaro et al. 2009; Pereira and De Gennaro 2009). Some perspectives about the constitutive modelling of time-dependent behaviour of geomaterials saturated by a single or two fluids, including soft rocks are proposed. Practical applications include modelling of (i) shallow quarries submitted to humidity changes, (ii) oil reservoir formations or (iii) geological storage of CO2. In this study, the formulation of the constitutive model is presented. Numerical predictions including explicit influence of suction on time dependency of material's behaviour are compared to available experimental data on oil reservoir and quarry chalks and discussed.