Geotechnical Engineering in the Face of Climate Change: Role of Multi-Physics Processes in Partially Saturated Soils
Geotechnical Engineering in the Face of Climate Change: Role of Multi-Physics Processes in Partially Saturated Soils
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面对气候变化的岩土工程：多物理过程在部分饱和土壤中的作用
DOI：
10.1061/9780784481585.035
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
AghaKouchak, Amir
中科院分区：
文献类型：
--
作者：
Vahedifard, Farshid;Williams, James M.;AghaKouchak, Amir
预计气候变化将改变极端事件的统计数据，包括暴雨、洪水、干旱和热浪。气候适应性土工结构需要对新出现的和预测的极端模式对土工结构短期和长期行为的影响进行定量评估。此外，还应考虑非极端气候事件对土壤碳和水分的长期变化。虽然已经进行了几项大规模研究来评估气候变化的各个方面，但在评估岩土结构对气候趋势变化（例如气候变暖、持续干旱、极端降水加剧和海平面上升）的恢复能力方面，知识水平明显存在差距。上述大多数气候趋势都提出了涉及部分饱和土壤和土质结构中的热-水-机械（THM）过程的多物理问题。本文讨论了气候变化中土壤-大气相互作用和极端事件模式如何改变土壤性质和荷载条件，从而影响部分饱和土工结构的性能。我们推测气候趋势的变化如何通过强度降低、干燥、土壤干燥开裂、收缩、土壤有机质的微生物氧化、地下水位波动、土地和地表侵蚀以及高动态孔隙压力变化来削弱部分饱和土结构。这些弱化过程主要是由土壤湿度和温度的变化引起的。最后，我们讨论了气候趋势对部分饱和土结构施加的潜在破坏模式。
Climate change is expected to alter the statistics of extreme events including rainfall storms, floods, droughts, and heatwaves. Climate-adaptive geotechnical structures warrant a quantitative assessment of the impacts of emerging and projected extreme patterns on the short and long-term behaviors of earthen structures. Furthermore, long-term changes to soil carbon and moisture due to non-extreme climate events should also be considered. While several large-scale studies have been conducted to evaluate various aspects of climate change, there is a clear gap in the state of knowledge in terms of assessing the resilience of geotechnical structures to changes in climatic trends (e.g., warmer climate, protracted droughts, intensified extreme precipitations, and sea level rise). The majority of the aforementioned climatic trends pose multi-physics problems involving thermo-hydro-mechanical (THM) processes in partially saturated soils and earthen structures. This review paper discusses how soil-atmospheric interactions and extreme event patterns in a changing climate can alter soil properties and loading conditions, affecting the performance of partially saturated geotechnical structures. We speculate how changes in climatic trends may weaken partially saturated earthen structures through strength reduction, drying, soil desiccation cracking, shrinkage, microbial oxidation of soil organic matter, fluctuation in the ground water table, land and surface erosion, and highly dynamic pore pressure changes. Each of these weakening processes is primarily induced by variations in the soil moisture and temperature. Finally, we discuss potential modes of failure imposed on partially saturated earthen structures by climatic trends.
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影响因子：
3.4
作者：
Damberg, Lisa;AghaKouchak, Amir
通讯作者：
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DOI：
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发表时间：
2017
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2001
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DOI：
10.1061/9780784480724.045
发表时间：
2017
期刊：
Geotechnical Special Publication No. 285
影响因子：
--
作者：
Jasim, Firas H.;Vahedifard, Farshid;Ragno, Elisa;AghaKouchak, Amir;Ellithy, Ghada
通讯作者：
Ellithy, Ghada
DOI：
--
发表时间：
2016
期刊：
影响因子：
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作者：
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