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首页> 外文期刊>Cold regions science and technology >Construction on permafrost foundations: Lessons learned from the Qinghai-Tibet railroad
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Construction on permafrost foundations: Lessons learned from the Qinghai-Tibet railroad

机译：多年冻土基础的建设：从青藏铁路汲取的教训

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摘要

In allusion to the problems of the frozen soil engineering geology, the roadbed stability with climate change in construction of the Qinghai-Tibet Railway (QTR), this paper provides overview of the frozen soil engineering problems before and during the QTR constructions. Based on the experiences and lessons learned from the road construction in permafrost areas, the authors recommended that the principle of "positive cooling" of the railroad roadbed by lowering permafrost temperatures should be used in the design of the QTR, rather than that of "passive protection" of permafrost through increasing thermal resistance of the roadway, such as simply increasing fill thickness and/or using thermal-insulation materials. This is especially important for the road sections in warm, ice-rich permafrost areas. In addition, this paper reviews several methods for "cooled roadbed" by controlling radiation, convection and conduction through modifying roadway structure and using different fill materials. Meanwhile, the authors also provide information on some existing problems and future monitoring programs along the QTR.
机译：针对青藏铁路施工中冻土工程地质问题，路基稳定性与气候变化等问题，本文综述了冻土工程施工前后的冻土工程问题。根据多年冻土地区道路建设的经验和教训，作者建议通过降低多年冻土温度来对铁路路基进行“正冷却”，而不是“被动”。通过增加巷道的热阻（例如简单地增加填充厚度和/或使用隔热材料）来保护“永久冻土”。对于温暖，富含冰层的多年冻土地区的路段而言，这一点尤其重要。此外，本文回顾了几种“冷却路基”方法，这些方法通过修改巷道结构和使用不同的填充材料来控制辐射，对流和传导。同时，作者还提供了有关QTR上一些现有问题和未来监控程序的信息。

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