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问题1:热棒真是在夏天将路基中的热散发到空气中吗?案例1.苏科版八(上)物理课本第51页是这样说的:“保持路基冻土是青藏铁路建设中的难题之一.冬季冻土坚硬,而夏季冻土会熔化,路基硬度减小,火车的重压会使路基及铁轨严重变形.因此,必须设法保持冻土不受夏季高温影响.我国科学工作者通过热棒等技术,创造性地解决了这一难题.”“热棒这种不用电的空调器,如图1所示,路基两旁插有碗口粗细、看上去像护栏的金属棒,这就是热棒.热棒是
Question 1: Is the hot rod actually dissipating heat from the embankment into the air in the summer? Case 1. The Sukko Version 8 (last) Physics Textbook says on page 51: ”Keeping the subgrade soils frozen is under construction in the Qinghai-Tibet Railway One of the difficult problems in winter is that the permafrost is hard in winter and the permafrost will melt in summer and the hardness of subgrade is reduced and the weight of train will make the subgrade and rail seriously deform.Therefore, Through the technology such as the hot rod, creatively solved this problem. “” Hot rod This does not have electricity air conditioner, as shown in Figure 1, the roadbed inserted on both sides of the thickness of the mouth, looks like a fence metal This is the hot stick