柴木铁路沼泽化冻土区热管冷却半径的观测研究  

Observation and Study of Cooling Radius of Heat Pipes in Swampy Permafrost Regions along Qaidar-Muli Railway

作　　者：陈继[1] 徐舜华[2] 窦顺 张鲁新[1] 

机构地区：[1]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 [2]中国地震局兰州地震研究所,甘肃兰州730000 [3]中铁西北科学研究院有限公司,甘肃兰州730000

出　　处：《冰川冻土》2011年第4期897-901,共5页Journal of Glaciology and Geocryology

基　　金：国家自然科学基金创新群体项目(40821001);国家自然科学基金项目(40871040)资助

摘　　要：柴达尔-木里铁路沿线高温沼泽化多年冻土广泛发育,约20 km的冻土路基采用了热管降温措施.借鉴青藏铁路的成功经验,热管的纵向和横向间距均设计为3 m,并针对铁路东南-西北的不利走向,在阳坡布设了双排热管.为验证热管措施在多年冻土湿地路段设计参数的合理性,2008年底在柴达尔-木里铁路中段布设了热管冷却半径观测试验场,该观测场热管的施工工艺、工程地质条件、气候条件与柴木铁路热管措施路段基本相同.结果表明,如果以降温-0.5℃作为热管有效冷却半径的界定标准,以热管蒸发段中部即3.5 m作为衡量深度,采用年平均温度和年最低温度作为划分依据的热管有效冷却半径分别为2.4 m和4.5 m,均大于达尔-木里铁路所采用的热管设计参数.Warm and swampy permafrost is distrib- uted widely along the Qaidar-Muli （Qai-Mu） Rail- way, where about 20 km embankments are e- quipped with heat pipes. According to the success- ful experience in the Qinghai-Tibet Railway, 3 m interval between heat pipes is designed. Taking into account the adverse trend of the railway, double rows of heat pipes are arranged at the bottom of sunny slopes. In order to confirm the validity of design parameter of heat pipes in swampy permafrost regions, a testing field for searching the cool- ing radius was built up in the middle part of the Qai-Mu Railway in the year of 2008. Constructing techniques of heat pipes, engineering geologic conditions and climate conditions in the field were all similar to this railway. Observation result shows that cooling radius of heat pipe is 2.4 m for taking the mean annual ground temperature as design standard and 4.5m for taking the minimum annual ground temperature as design standard, if the requirement is cooled down by --0.5 ℃ at the middle, 3.5 m deep, of a pipe. The results meet the demands of the Qai-Mu Railway design.

关 键 词：热管 冷却半径 观测研究 沼泽化冻土区 柴木铁路 

分 类 号：P642.14[天文地球—工程地质学]