基于 GPR 剖面数据的城市化永久冻土区塔利克区监测网络(楚科奇,阿纳德尔)

Oleg D. Tregubov, Konstantin K. Uyagansky
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引用次数: 0

摘要

现代气候变化对北极和亚北极城市化地区建筑物和结构地基底部永久冻土的承载能力产生了影响。低温过程的启动会导致基础设施的破坏,并对居民造成社会、经济和环境后果。根据冰冻和融化土壤的地热学结果以及阿纳德尔市的地质雷达剖面图,得出的结论是永久冻土退化的主要风险与氢化融化区的扩散有关。编制了深度为 3 米、5 米和 10 米的假想横截面土壤温度图,以及解冻土壤容量图、永久冻土含水层图和外源低温过程危险扩散区图。城市地区深度在 6 米以上的塔里克区总面积为 2.34 平方公里,占建成区面积的 67%。阿纳德尔地区的永久冻土监测系统得到了证实,该系统以监测塔里克地带的边界为基础。该系统包括在 20 个外源低温过程危险发展区边界和中心的 35 口井中观测地温的自动网络,以及在线性含氢滑石交汇处的 12 个控制 GPR 剖面。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Substantiation of the Monitoring Network of Talik Zones in Urbanized Permafrost Areas Based on GPR Profiling Data (Anadyr, Chukotka)
Modern climatic changes have an impact on the bearing capacity of permafrost soils at the base of the foundations of buildings and structures in the urbanized territories of the Arctic and Subarctic. The activation of cryogenic processes leads to the destruction of infrastructure and to social, economic, and environmental consequences for the population. Based on the results for the geothermy of frozen and thawing soil, and on the georadar profiling of the city of Anadyr, it was concluded that the main risks of permafrost degradation are associated with the spread of hydrogenic melting zones. Maps of the soil temperature in imaginary cross-sections with depths of 3, 5, and 10 m were compiled, along with maps of the capacity of thawing soils, the permafrost aquifer, and the dangerous spread zones for exogenous cryogenic processes. The total area of talik zones with a depth of 6 m or more in the urban area was 2.34 km2, or 67% of the built-up area. The system of permafrost monitoring in the territory of Anadyr was substantiated, and is based on monitoring the boundaries of talik zones. It consists of an automated network of observations of the ground temperature in 35 wells at the boundary and in the center of 20 zones of the dangerous development of exogenous cryogenic processes, as well as 12 control GPR profiles at the intersection of linear hydrogenic taliks.
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