Synthesis of physical processes of permafrost degradation and geophysical and geomechanical properties of permafrost
Synthesis of physical processes of permafrost degradation and geophysical and geomechanical properties of permafrost
复制标题
DOI：
10.1016/j.coldregions.2022.103522
复制
发表时间：
2022-02
影响因子：
4.1
通讯作者：
Min Liew;Xiaohang Ji;Ming Xiao;L. Farquharson;D. Nicolsky;V. Romanovsky;Matthew Bray;Xiong Zhang;Christopher McComb
中科院分区：
文献类型：
--
作者：
Min Liew;Xiaohang Ji;Ming Xiao;L. Farquharson;D. Nicolsky;V. Romanovsky;Matthew Bray;Xiong Zhang;Christopher McComb
最近北部高纬度地区的永久冻土退化影响了民用基础设施的性能。这项研究总结了岩土工程背景下多年冻土退化的物理过程的现状，以及受多年冻土影响的土壤的性质，这些特性对于评估北纬地区通常修建的基础设施的性能至关重要。我们收集了来自38个期刊和会议出版物的96个数据集，3162个数据点，分析了多年冻土退化影响下地球力学和地球物理性质的变化。这些数据集代表了不同测试条件下不同成分的冻土的一系列地质力学和地球物理性质。虽然收集的数据高度分散，但回归分析表明，大多数地球力学和地球物理性质与温度有很强的相关性。这些关联突出表明，持续变暖会极大地影响北部高纬度地区的民用基础设施的性能。这些特性包括弹性模数、强度参数、导热系数、热容量、未冻水含量和渗透系数。本文还讨论了其他因素，如土壤类型、土壤成分和围压，这些因素可能会使温度与地质力学和地球物理性质之间的关系变得更加复杂。通过这篇综述，我们找出了关键的知识缺口，并强调了永久冻土退化、温度、土壤异质性以及土壤地质力学和地球物理性质之间的复杂相互作用。鉴于在岩土技术背景下，除了多年冻土退化的复杂过程之外，某些永久冻土性质的稀缺，有必要建立一个全面和精选的永久冻土性质数据库。因此，我们鼓励工程界和科学界在这方面进行更广泛的合作和参与。
Recent permafrost degradation across the high northern latitude regions has impacted the performance of the civil infrastructure. This study summarizes the current state of physical processes of permafrost degradation in a geotechnical context and the properties of permafrost-affected soils critical for evaluating the performance of infrastructures commonly built in the high northern latitude regions. We collected a total of 96 datasets with 3162 data points from 38 journal and conference publications and analyzed the variations of geomechanical and geophysical properties under the effects of permafrost degradation. The datasets represent a range of geomechanical and geophysical properties of permafrost-affected soils with different compositions under different testing conditions. While the data collected are highly scattered, regression analysis shows that most geomechanical and geophysical properties have strong associations with temperature. These associations highlight that ongoing warming can greatly affect the performance of civil infrastructures at high northern latitudes. These properties include elastic moduli, strength parameters, thermal conductivity, heat capacity, unfrozen water content, and hydraulic conductivity. This paper also discusses other factors, such as soil type, soil composition, and confining pressure, which may further complicate the relationships between temperature and the geomechanical and geophysical properties. Through this review, we identify key knowledge gaps and highlight the complex interplay of permafrost degradation, temperature, soil heterogeneity, and soil geomechanical and geophysical properties. Given the scarcity of certain permafrost properties in addition to the complex processes of permafrost degradation in the geotechnical context, there is a need to establish a comprehensive and curated database of permafrost properties. Hence, we encourage broader collaboration and participation by the engineering and scientific communities in this effort.