可调控通风管路基的降温效果.pdf

文档介绍：第 24 卷第 18 期岩石力学与工程学报 Vol . 24 No. 18
2005 年 9 月 Chinese Journal of Rock Mechanics and Engineering Sept.,2005



可调控通风管路基的降温效果

李国玉 1,李宁 1,2,全晓娟 1
(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. 西安理工大学岩土工程研究所,陕西西安 710048)

摘要:可调控通风管路基是一种理想的保护高温冻土的工程措施。针对青藏铁路高温冻土段存在的冻融问题,考
虑太阳辐射和附面层对边界条件的影响,通过对传统和可调控通风管路基进行详细的数值仿真分析,结果表明:
可调控通风管路基在夏季(8 月份)0 ℃的等温线比传统的通风管路基要高,说明其冻土上限抬升较高,冻土会得到
更好保护,并且其路基下面也不会出现融化盘;冬季(3 月份)-4 ℃的等温线传递深度要比传统通风管路基深,其
对路基基层冻土的降温速度和冷却效果要明显优于传统的通风管路基。
关键词:土力学;青藏铁路;可调控通风管路基;降温效果;数值分析
中图分类号:TU 文献标识码:A 文章编号:1000–6915(2005)18–3287–05

COOLING EFFECT ON ADJUSTABLE VENTILATED EMBANKMENT

LI Guo-yu1,LI Ning1,2,QUAN Xiao-juan1
(1. State Key Laboratory of Frozen Soil Engineering,Cold and Arid Regions Environmental and Engineering Research Institute,
Chinese Academy of Sciences,Lanzhou 730000,China;
2. Institute of Geotechnical Engineering,Xi′an University of Technology,Xi′an 710048,China)

Abstract:The adjustable ventilated embankment,which is adopted in Qinghai―Tibet Railway,is an ideal
engineering measure to protect warm frozen soil. Aiming at the freezing-thawing problems of warm frozen soil
where Qinghai―Tibet Railway has been constructed,this paper has considered the influence of solar radiation and
the adherent layer on the boundary conditions and has performed detailed numerical simulation analysis an