Periglacial processes can threaten the operation of engineering infrastructure. Based on field observations, the influence of four types of periglacial processes on tower foundations along the Qinghai–Tibet Engineering Corridor were investigated. These periglacial processes change the local thermal and hydraulic processes in soils around the pile foundations, thereby threatening their stability. Frost heaving-related periglacial phenomena and fast mass wasting are major threats for the operation of pile foundations. The long-term stability of pile foundations is also threatened by thermokarst-related periglacial processes and slow mass wasting under the evolving climate change scenario on the Qinghai–Tibet Plateau. Frost weathering has a slight impact on the stability of concrete pile heads, and the long-term effects of this cannot be ignored. In addition to the impacts of periglacial processes, piles are also affected by engineering problems in areas with shallow artesian ground water, where the use of thermosyphons is associated with frost jacking of the foundations. Further studies are needed on the thermal and hydraulic regimes in soils under the influence of artesian ground water and thermokarst lakes/ponds.

中文翻译：

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青藏高原冰缘过程对桩基影响的现场调查

冰缘过程可能威胁到工程基础设施的运行。在野外观测的基础上，研究了四种类型的冰缘过程对青藏工程走廊沿线塔基的影响。这些冰缘过程改变了桩基周围土壤中的局部热力和水力过程，从而威胁到它们的稳定性。与霜胀相关的冰缘现象和快速的质量浪费是桩基础运行的主要威胁。在青藏高原不断变化的气候变化情景下，与热岩溶相关的冰缘过程和缓慢的质量浪费也威胁到桩基的长期稳定性。霜冻风化对混凝土桩头的稳定性有轻微影响，其长期影响不容忽视。除了冰缘过程的影响之外，在浅层自流地下水地区，桩也受到工程问题的影响，在这些地区，热虹吸管的使用与地基的霜冻有关。需要进一步研究在自流地下水和热岩溶湖泊/池塘影响下的土壤中的热力和水力状况。