多年冻土区宽幅公路路基降温效果研究——一种L型热管–块碎石护坡复合路基

摘要
图/表
参考文献
相关文章 (9)

全文: PDF (540 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要为维护多年冻土区宽幅高等级公路的热稳定性及保护下伏冻土，提出了一种 L 型热管–块碎石护坡保温板复合路基。为研究这种新型路基的降温效果，进行了室内模型试验，试验结果初步证明了这种路基的有效降温能力。为研究这种新型路基的长期效果，采用相关理论，结合室内模型试验的结果，依据青藏高原多年冻土区宽幅高等级公路的气温和地质条件，利用数值方法对有无 L 型热管的块碎石护坡保温板复合路基的温度特征进行了分析和比较。结果表明：在年平均气温为 - 4.0 ℃的青藏高原多年冻土区，考虑未来 50 a 气温上升 2.6 ℃的条件下，新的复合路基能够从整体上有效降低路基下土体的温度，确保高温多年冻土区宽幅高等级公路路基的热稳定性。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	董元宏
	赖远明
	陈武

关键词 ：高等级公路, L 型热管, 块碎石护坡, 降温效果

Abstract：In order to keep the thermal stability of large-width highway embankment in permafrost regions, a new type of cooling measure of combined L-shaped thermosyphon, crushed-rock revetment and insulation is presented. To examine its cooling effect, laboratory tests are carried out. The test results have preliminarily proved the effectiveness of the new cooling measure. To further validate its effectiveness in the service life of the highways in permafrost regions, based on relative theories and the laboratory test results, a numerical model for the highway embankment is established, and the temperature characteristics of the embankment in its service life are analyzed. The numerical results show that the combination of the L-shaped thermosyphon, crushed-rock revetment and insulation is effective to keep the thermal stability of the large-width embankment in its service life under the condition that the air temperature is warmed up by 2.6℃. Based on this, the new combined cooling measure is suggested to be used in the construction of large-width embankment in permafrost regions.

Key words： high-grade highway L-shaped thermosyphon crushed-rock revetment cooling effect

收稿日期: 2012-06-25

TU43

基金资助:国家自然科学基金项目(40730736, 41101068)；中交寒区道路实验室开放基金资助项目；中央高校基本科研业务专项基金项目(CHD2009JV172)；交通运输部应用基础研究重点项目

作者简介: 董元宏 (1983 – ),男，甘肃庆阳人，博士，主要从事寒区岩土工程方面的研究工作。

引用本文:

董元宏, 赖远明, 陈武. 多年冻土区宽幅公路路基降温效果研究——一种L型热管–块碎石护坡复合路基[J]. 岩土工程学报, 2012, 34(6): 1043-1049. DONG Yuan-hong, LAI Yuan-ming, CHEN Wu. Cooling effect of combined L-shaped thermosyphon, crushed-rock revetment and insulation for high-grade highways in permafrost regions. Chinese J. Geot. Eng., 2012, 34(6): 1043-1049.

链接本文:

http://manu31.magtech.com.cn/Jwk_ytgcxb/CN/ 或 http://manu31.magtech.com.cn/Jwk_ytgcxb/CN/Y2012/V34/I6/1043

[1] 赖远明 , 张明义 , 李双洋 . 寒区工程理论与应用 [M]. 北京 : 科学出版社 , 2009. (LAI Yuan-ming, ZHANG Ming-yi, LI Shuang-yang. Theory and application of cold regions engineering[M]. Beijing: Science Press, 2009. (in Chinese))
[2] 马巍 , 程国栋 , 吴青柏 . 多年冻土地区主动冷却地基方法研究 [J]. 冰川冻土 , 2002, 24 (5): 579 – 587. (MA Wei, CHENG Guo-dong, WU Qing-bai. Preliminary study on technology of cooling foundation in permafrost regions[J]. Journal of Glaciology and Geocryology, 2002, 24 (5): 579 – 587. (in Chinese))
[3] 孙志忠 , 马巍 , 李东庆 . 青藏高原多年冻土区碎石护坡降温作用及效果分析 [J]. 冰川冻土 , 2007, 29 (2): 292 – 299. (SUN Zhi-zhong, MA Wei, LI Dong-qing. Cooling effect of crushed rock revetment in permafrost regions[J]. Journal of Glaciology and Geocryology, 2007, 29 (2): 292 – 299. (in Chinese))
[4] 牛富俊 , 马巍 , 赖远明 . 青藏铁路北麓河试验段通风管路基工程效果初步分析 [J]. 岩石力学与工程学报 , 2003( 增刊 2): 2652 – 2658. (NIU Fu-jun, MA Wei, LAI Yuan-ming. Preliminary analysis on engineering effect of ventilation embankment at Beiluhe test section of Qinghai-Tibet Railway[J]. Chinese Journal of Rock Mechanics and Engineering, 2003(S2): 2652 – 2658. (in Chinese))
[5] 吴志坚 , 马巍 , 盛煜 , 等 . 通风管、抛碎石和保温材料保护冻土路基的工程效果分析 [J]. 岩石力学 , 2005, 26 (8): 1288 – 1294. (WU Zhi-jian, MA Wei, SHENG Yu, et al. Cooling effectiveness analysis of the vent-pipe, cast-detritus and heat preservation materials on protecting embankment in permafrost regions[J]. Rock and Soil Mechanics, 2005, 26 (8): 1288 – 1294. (in Chinese))
[6] 马巍 , 余邵水 , 吴青柏 , 等 . 青藏高原多年冻土区冷却路基技术现场实效监测研究 [J]. 岩石力学与工程学报 , 2006, 25 (3): 563 – 571. (MA Wei, YU Shao-shui, WU Qing-bai, et al. Study on in-situ monitoring technology of cooling roadbed in permafrost regions of Qinghai-Tibet Plateau[J]. Chinese Journal of Rock Mechanics and Engineering, 2006, 25 (3): 563 – 571. (in Chinese))
[7] 潘卫东 , 赵肃菖 , 徐伟泽 , 等 . 热棒技术加强高原冻土区路基热稳定性的应用研究 [J]. 冰川冻土 , 2003, 25 (4): 433 – 439. (PAN Wei-dong, ZHAO Su-chang, XU Wei-ze, et al. Application of thermal probe to enhance thermal stability of roadbed in plateau permafrost areas[J]. Journal of Glaciology and Geocryology, 2003, 25 (4): 433 – 439. (in Chinese))
[8] 全晓娟 , 李宁 , 李国玉 . 冻土地区一种新型抛石护坡路基的研究 [J]. 岩石力学与工程学报 , 2006, 25 (8): 1645 – 1651. (QUAN Xiao-juan, LI Ning, LI Guo-yu. Study on embankment with new-type rock revetment in permafrost regions[J]. Chinese Journal of Rock Mechanics and Engineering, 2006, 25 (8): 1645 – 1651. (in Chinese))
[9] 朱林楠 . 高原冻土区不同下垫面的附面层研究 [J]. 冰川冻土 , 1988, 10 (1): 8 – 14. (ZHU Lin-nan. Study of the adherent layer on different types of ground in permafrost regions on the Qinghai-Xizang Plateau[J]. Journal of Glaciology and Geocryology, 1988, 10 (1): 8 – 14. (in Chinese))
[10] NIELD D A, BEJAN A. Convection in porous media[M]. New York: Springer Verlag, 1992.
[11] 孔祥言 , 吴建兵 . 多孔介质中的非达西自然对流的分岔研究 [J]. 力学学报 , 2002, 34 (2): 177 – 185. (KONG Xiang-yan, WU Jian-bing. A bifurcation study of non-Darcy free convection in porous media[J]. Acta Mechanica Sinica, 2002, 34 (2): 177 – 185. (in Chinese))
[12] LAI Yuan-ming, LI Jian-jun, NIU Fu-jun, et al. Nonlinear thermal analysis for Qinghai-Tibet Railway embankments in cold regions[J]. Journal of Cold Regions Engineering, 2003, 17 (4): 171 – 184.
[13] LAI Yuan-ming , ZHANG Lu-xin , ZHANG Shu-juan, et al. Cooling effect ripped-stone embankments on Qinghai-Tibet Railway under climatic warming[J]. Chinese Science Bulletin, 2003, 48 (6): 598 – 604.
[14] JTGD30 — 2004 公路路基设计规范 [S]. 北京 : 人民交通出版社 , 2004. (JTGD30 — 2004 Specifications for design of highway subgrades[S]. Beijing: China Communications Press, 2004. (in Chinese))
[15] JTG B01 — 2003 公路工程技术标准 [S]. 北京 : 人民交通出版社 , 2003. ( JTG B01 — 2003 Technical standard of highway engineering[S]. Beijing: China Communications Press, 2004. (in Chinese))
[16] 程国栋 , 江灏 , 王可丽 , 等 . 冻土路基表面的融化指数与冻结指数 [J]. 冰川冻土 , 2003, 25 (6): 603 – 607. ( CHENG Guo-dong, JIANG Hao, WANG Ke-li, et al. Thawing index and freezing index on the embankment surface in permafrost regions[J]. Journal of Glaciology and Geocryology, 2003, 25 (6): 603 – 607. (in Chinese))
[17] 秦大河 . 中国西部环境演变评估综合报告 [M]. 北京 : 科学出版社 , 2002. (QIN Da-he. Assessment on the environmental in west China[M]. Beijing: Science Press, 2002. (in Chinese))