透壁通风管路堤的降温特性研究  

Cooling effect of embankments with perforated ventilation pipes

作　　者：刘琦[1] 孙斌祥[1] 杨丽君[1] 汪双杰[2] 章金钊[2] 

机构地区：[1]绍兴文理学院土木工程系,浙江绍兴312000 [2]中交第一公路勘察设计研究院,陕西西安710068

出　　处：《岩土工程学报》2008年第8期1152-1157,共6页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金项目(40672183,40772194)

摘　　要：通过不同因素对透壁通风管路堤降温特性影响的室内试验研究,结果表明,透壁通风管的开孔率对路堤降温效果的影响比较明显,总体上,随着管壁开孔率的增大通风管路堤降温效果也随之增强,由于透壁通风管通风期间水分蒸发而产生蒸发耗热,从而使路堤土体温度降低,通风管材料对降温效果也有一定的影响,另外透壁通风管路堤仅负温通风时的降温效果整体上强于整个温度波动期间均通风时的降温效果。Various factors of influence on the cooling effect of embankments with perforated ventilation pipes were studied. It was shown that the impact of various trepanning rates in ventilation pipes on the cooling effect of embankments was significant. Generally the cooling effect of ventilated embankments increased with the increasing trepanning rate in the ventilation pipes. Evaporation of water within the soil samples through pores in the ventilation pipe shells during ventilating could trigger the effect of vapor transfer and significantly lower the temperature of the soil in the ventilated embankments. Various materials of ventilation pipes might also have some influence on the cooling effect of ventilated embankments. The cooling effect of embankments with perforated ventilation pipes during ventilating under zero temperature was stronger than that under fluctuating temperature.

关 键 词：青藏公路 冻土路堤 透壁通风管 降温效果 

分 类 号：TU445[建筑科学—岩土工程] U213.1[建筑科学—土工工程]