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柴达尔-木里铁路位于青藏高原东北部的祁连山南麓,沿线有超过75 km路基展布于大通河两岸的多年冻土湿地,其中,高温、高含冰量冻土路段超过35 km,冻土工程地质条件极差.出于冷却冻土、稳定路基的考虑,在沿线多处路段采用了热棒.柴木铁路沿线气象观测资料表明,冬季平均气温低,夏季有促进热棒工作的负温天气过程,再加上年平均风速较高,为提高热棒的冷却效果提供了有利的气候条件.根据在DK99+100、DK99+200和DK99+355三个热棒措施断面2007-2009年的地温监测结果,发现柴木铁路试验段的热棒可以有效地降低湿地型多年冻土的温度,提升冻土路基下的人为上限.
The Qaidar-Muli Railway is located in the southern foot of the Qilian Mountains in the northeastern Qinghai-Tibet Plateau with more than 75 km of subgrade permafrost spreading along both banks of the Datong River. Among them, the high temperature and high ice content permafrost sections exceed 35 km, The geological conditions are very poor.For the sake of cooling the permafrost and stabilizing the roadbed, hot sticks are used in many sections along the line.The meteorological observation data along the Chai-Mu railway indicate that the average winter temperature is low, and the negative temperature weather process , Together with the high average annual wind speed, provide favorable climatic conditions for improving the cooling effect of the hot rod.According to the three hot rod measures in the DK99 +100, DK99 +200 and DK99 +355 cross section 2007-2009 geothermal temperature monitoring As a result, it was found that the hot rods in the test section of Chai Mu Railway can effectively reduce the temperature of wetland permafrost so as to increase the artificial upper limit under the permafrost subgrade.