通风管路基的调温机理  

Temperature Adjustment Mechanism of Ventilation Pipeline Embankment

作　　者：孙红[1] 葛修润[1] 章金钊[2] 牛富俊[3] 

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200240 [2]中交第一公路勘察设计研究院有限公司,陕西西安710075 [3]中国科学院寒区旱区环境与工程研究所冻土工程国家重点实验室,甘肃兰州730000

出　　处：《公路交通科技》2013年第5期19-23,37,共6页Journal of Highway and Transportation Research and Development

摘　　要：考虑通风管路基中通风管的空气对流换热特点,摈弃把通风管的影响作为边界条件处理的方法,建立多年冻土区的通风管路基的数值模型,对设置和未设置风门的通风管路基的温度特性进行数值模拟,分析2种情况下通风管路基的调温效果,为多年冻土区的路基工程的建设和安全运营提供技术支撑。研究表明:通风管路基能够明显地降低冻土地基的温度,提高冻土的人为上限;与无风门的路基相比,有风门的通风管路基降低冻土地基的温度的效果更加明显,降温作用发生得更早,冻土人为上限的提高幅度更大,路基中心和路肩下的地基温度降低更快,且温度分布较均匀,路基温度稳定所需要的时间减少。Based on convection heat transfer characteristics of air inside ventilation pipe of ventilation pipeline embankment, discarding the method which takes the influence of ventilation pipe as boundary condition, the numerical model for ventilation pipeline embankment on permafrost region is established. The temperature characteristics of ventilation pipeline embankment with air doors and without air door are simulated, and their cooling effects are analysed to provide the technical support for the construction and safe operation of embankment in permafrost region. It is shown that （1） the underlying permafrost temperature can be obviously reduced and artificial upper table of permafrost can be raised by the ventilation pipeline embankment; （2） compared with the ventilation pipeline embankment without air door, the cooling effect of embankment with air doors is better, its cooling function operates earlier, and the artificial upper table of permafrost rises higher, the underlying permafrost temperature under the center and shoulder of the embankment reduces more quickly with basic uniform distribution, and it costs shorter time to become stable for embankment temperature.

关 键 词：道路工程 通风管路基 调温机理 数值模拟 多年冻土 风门 

分 类 号：TU445[建筑科学—岩土工程]