透壁通风管路堤降温效应的室内试验研究

介绍了研究透壁通风管路堤降温效果的室内试验方法,对100cm×60cm×100cm尺寸的不同通风管路堤试样进行了实验研究。结果表明,采用透壁通风管能明显增强路堤的降温效果,而只在负温期间通风的透壁通风管路堤降温效果更为显着,路堤在通风管进风口附近的温度变化幅度以及负温区域的范围都明显大于通风管出风口处,形成了路基温度场沿着风向的不对称分布。

Investigation of laboratory tests on cooling effect of embankments with perforated ventilation pipes

A technique of laboratory tests for the cooling mechanism in embankments with perforated ventilation pipes was introduced.Various ventilated-embankment samples with dimensions of 100 cm×60 cm×100 cm under cyclically fluctuating upper-surface temperature were studied experimentally.It was shown that the ventilated embankment with perforated ventilation pipe could enhance the cooling effectiveness of the embankment base.The cooling of perforated ventilation pipe embankment was effective only under negative temperature.Temperature change amplitudes and distribution ranges of negative temperature in the vicinity of air inlet of ventilation pipe were larger than those in the vicinity of air outlet of ventilation pipe.This was a direct consequence of unsymmetrical temperature distribution along a wind direction parallel to the ventilation pipes.