吴青柏, 张中琼, 刘戈. 2021. 青藏高原气候转暖与冻土工程的关系[J]. 工程地质学报, 29(2): 342-352. doi: 10.13544/j.cnki.jeg.2020-084.
    引用本文: 吴青柏, 张中琼, 刘戈. 2021. 青藏高原气候转暖与冻土工程的关系[J]. 工程地质学报, 29(2): 342-352. doi: 10.13544/j.cnki.jeg.2020-084.
    Wu Qingbai, Zhang Zhongqiong, Liu Ge. 2021. Relationships between climate warming and engineering stability of permafrost on Qinghai-Tibet plateau[J]. Journal of Engineering Geology, 29(2): 342-352. doi: 10.13544/j.cnki.jeg.2020-084.
    Citation: Wu Qingbai, Zhang Zhongqiong, Liu Ge. 2021. Relationships between climate warming and engineering stability of permafrost on Qinghai-Tibet plateau[J]. Journal of Engineering Geology, 29(2): 342-352. doi: 10.13544/j.cnki.jeg.2020-084.

    青藏高原气候转暖与冻土工程的关系

    RELATIONSHIPS BETWEEN CLIMATE WARMING AND ENGINEERING STABILITY OF PERMAFROST ON QINGHAI-TIBET PLATEAU

    • 摘要: 工程作用和气候转暖影响加剧了工程下部多年冻土的退化,导致冻土工程稳定性发生显著变化。本文从气候转暖和工程活动下多年冻土变化和冻融灾害的视角探讨了气候转暖与工程稳定性的关系,给出了青藏高原气候转暖下活动层厚度、冻土温度等变化和青藏公路和青藏铁路工程下部多年冻土上限、冻土温度和路基变形等特征。同时,系统梳理了青藏高原冻土工程防治冻土融化的工程技术措施,讨论了未来气候变暖下青藏高原多年冻土的变化特征及其对冻土工程服役性的影响。青藏高原多年冻土在过去数十年来发生了不同程度的退化,工程作用加速了工程下部多年冻土退化,严重影响工程稳定性。青藏铁路采取了冷却路基、降低多年冻土温度的技术措施,但冻土工程仅能适应气候变暖1 ℃的情况。未来气候变暖1.5 ℃,青藏铁路冻土工程的补强措施需尽早谋划。

       

      Abstract: Climate warming and engineering actions impact and accelerate permafrost degradation, resulting in significant changes of engineering stability in permafrost regions. This article mainly discusses the relationship between climate warming and engineering stability from the view of permafrost changes and engineering hazards under the impacts of climate warming and engineering. We summarize the changes in active layer thickness and permafrost temperature under climate warming and in permafrost table and temperature under the embankment of Qinghai-Tibet Highway and Railway and their subgrade deformation. Especially, we summarize the engineering measures of preventing permafrost thaw under the embankment in Qinghai-Tibet Plateau and discuss the role of these measures of cooling underlying permafrost under the future climate warming and its impact on the engineering serviceability. The results show that the Plateau permafrost has undergone remarkable degradation during the past decades and engineering thermal impacts accelerated permafrost degradation under the embankment, resulting in engineering instability. Qinghai-Tibet Railway used some measures of cooling the underlying permafrost, which can adapt to climate warming of 1.0 ℃. Under the future climate warming of 1.5 ℃, reinforcement measures of Qinghai-Tibet Railway is required and has to be planned as soon as possible.

       

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