Constitutive and experimental modelling of the geotechnical degradation of compacted soils when exposed to environmental actions

气候驱动过程对压实非饱和土的影响已成为岩土工程研究的一个重要领域。非饱和土被用作近地表填充材料，并大量用于建造基础设施边坡和护坡。这些斜坡和斜坡表面附近的土壤容易因气候引起的过程而发生机械退化，从而影响基础设施的性能。这一研究项目将进一步探讨土壤在周期性干湿交替下的恶化情况，这一点尚未得到充分了解。对非饱和土水力力学行为的文献进行的初步回顾表明，进一步的实验室表征将有益于现有的知识体系。此外，先进的实验室表征的临界状态参数将是有价值的改进和完善现有的完全耦合弹塑性本构模型，如格拉斯哥耦合模型。

The effects of weather-driven processes such as cyclical wetting and drying on compacted unsaturated soils has become a critical area of research in geotechnical engineering. Unsaturated soils are used as near-surface fill materials and are heavily utilised to construct infrastructure slopes and embankments. The soil near the surface of these slopes and embankments is prone to mechanical degradation through climate-induced processes that influence the infrastructure's performance. This research project will explore further the deterioration of soils subjected to cyclical wetting and drying, which are not yet fully under-stood. A preliminary review of the literature focused on the hydro-mechanical behaviour of unsaturated soils has shown that further laboratory characterisation would benefit the existing body of knowledge. In addition, advanced laboratory characterisation of critical state parameters will be valuable in im-proving and refining existing fully coupled elasto-plastic constitutive models such as the Glasgow Coupled Model.