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浙江大学学报(工学版)
J4  2010, Vol. 44 Issue (10): 1845-1850    DOI: 10.3785/j.issn.1008-973X.2010.10.001
岩土工程、土木及建筑工程     
青藏高等级公路通风管试验路基降温效果
张坤1, 李东庆1, 李建宇2, 童刚强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.中交第四航务工程勘察设计院有限公司,广东 广州 510230
Cooling effect of ventilated experimental embankment of
Qinghai-Tibet high-grade road
ZHANG Kun1, LI Dong-qing1, LI Jian-yu2, TONG Gang-qiang1
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. The 4th Harbor Consultants Company Limited of China Communication Construction Company, Guangzhou 510230, China
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摘要：

在假定未来50 a气温升高2.6 ℃和初始年平均气温为-4.0 ℃的前提下,应用有限体积法(FVM)对青藏高等级公路试验示范工程段普通路基、普通通风管路基和通风管XPS复合路基温度场进行三维非线性分析.结果表明,普通路基下部冻土退化严重,第50年的最大融化深度为10.98 m,冬季土体中有融化核存在.普通通风管路基和通风管XPS复合路基在一定时期内可以降低下部多年冻土的温度,提高0 ℃等温线,且通风管XPS复合路基的降温效果略优于普通通风管路基,但在气温不断升高和沥青路面吸热的双重影响下,这2种路基的坡脚处会出现融化核,且0 ℃等温线已经延伸到路基中心处,这将直接影响路基的稳定性.
Abstract:

Assuming the total rising temperature of 2.6 ℃ in next 50 years and the initial mean annual air temperature of -4.0 ℃, the three-dimensional temperature fields of the traditional embankment, the ordinary ductventilated embankment and the ductventilatedXPS embankment were analyzed by the finite volume method (FVM). Results show that the permafrost underlying traditional embankment is seriously degraded and the thaw depth is 10.98 m at the 50th year, meanwhile there is a thaw bulb in the soil in the winter. Both the ordinary ductventilated embankment and the ductventilatedXPS embankment can cool down the permafrost and uplift the 0 ℃ isotherm beneath the embankments. The cooling effect of the ductventilatedXPS embankment is slightly better than that of the ordinary ductventilated embankment, but the thaw bulbs will appear under the slope toes due to the climate warming and the heat absorption of asphalt pavement, and the 0 ℃ isotherm is extended to the center of embankment, which will affect the thermal stability of embankment.
出版日期: 2010-10-01
:  U 416.1  
基金资助:

中国科学院西部行动计划(二期)资助项目(KZCX2XB210)；国家自然科学基金资助项目(40671039)；国家“863”高技术研究发展计划资助项目(2008AA11Z103)；冻土工程国家重点实验室基金资助项目(SKLFSEZY03).
通讯作者: 李东庆,男,研究员,博导.     E-mail: dqli@lzb.ac.cn
作者简介: 张坤(1981—),男,黑龙江龙江人,博士生,从事寒区岩土工程的研究.E-mail: zhangkun2020@163.com
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引用本文:

张坤, 李东庆, 李建宇, 童刚强. 青藏高等级公路通风管试验路基降温效果[J]. J4, 2010, 44(10): 1845-1850.

ZHANG Kun, LI Dong-Qiang, LI Jian-Yu, TONG Gang-Jiang. Cooling effect of ventilated experimental embankment of
Qinghai-Tibet high-grade road. J4, 2010, 44(10): 1845-1850.

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http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2010.10.001    或    http://www.zjujournals.com/eng/CN/Y2010/V44/I10/1845

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