Abstract Construction of transportation infrastructure often results in permafrost degradation and climate warming amplifies this phenomenon. Heat drains, based on wintertime natural convection, are a new mitigation technique designed to limit or avoid the thawing of permafrost. In winter, heat extraction is enhanced by the buoyancy-driven convection of the pore-air due to unstable air density in the heat drain. To monitor the efficiency of this technique, a heat drain was constructed in the shoulder of the Tasiujaq airstrip in Northern Quebec, Canada, in the summer of 2007. Thermistors were installed beneath the side slopes to measure ground temperatures. A good thermal performance was observed resulting in thermal stabilization of the underlying permafrost. A thermal model was developed based on the Tasiujaq experimental site characteristics and conditions. The model was also calibrated to the field data collected at Tasiujaq. A set of design charts were developed through the model and were successfully validated using the measured data from Salluit, Northern Quebec, Canada, where a heat drain was installed in 2012.

中文翻译：

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解冻敏感多年冻土路堤热稳定排热能力研究

摘要 交通基础设施建设经常导致永久冻土退化，气候变暖加剧了这一现象。基于冬季自然对流的排热系统是一种新的缓解技术，旨在限制或避免永久冻土的融化。在冬季，由于排热管中的空气密度不稳定，孔隙空气的浮力驱动对流增强了热量提取。为了监测这种技术的效率，2007 年夏天，在加拿大魁北克北部的 Tasiujaq 简易机场的肩部建造了一个排热装置。在边坡下方安装了热敏电阻以测量地面温度。观察到良好的热性能，导致下层永久冻土的热稳定。基于 Tasiujaq 实验场地的特征和条件开发了热模型。该模型还根据在 Tasiujaq 收集的现场数据进行了校准。通过该模型开发了一组设计图表，并使用来自加拿大魁北克北部 Salluit 的测量数据进行了成功验证，该地区于 2012 年安装了排热装置。