[1]刘国光,等.春融作用对寒区机场土面区工作性能的影响[J].深圳大学学报理工版,2019,36(No.6(599-724)):621-627.[doi:10.3724/SP.J.1249.2019.06621]
 LIU Guoguang,,et al.Influences of spring thaw on working performance of airport soil field surface in cold region[J].Journal of Shenzhen University Science and Engineering,2019,36(No.6(599-724)):621-627.[doi:10.3724/SP.J.1249.2019.06621]
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春融作用对寒区机场土面区工作性能的影响()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第36卷
期数:
2019年No.6(599-724)
页码:
621-627
栏目:
土木建筑工程
出版日期:
2019-11-20

文章信息/Info

Title:
Influences of spring thaw on working performance of airport soil field surface in cold region
文章编号:
201906004
作者:
刘国光1 2 3杨跃敏3牛富俊1孟兆刚4王庆彬4薛 军4
1)中国科学院西北生态环境资源研究院冻土工程国家重点实验室,甘肃兰州730000; 2)中国科学院大学,北京100049; 3)中国民航大学机场学院,天津 300300;4)漠河古莲机场,黑龙江漠河165300
Author(s):
LIU Guoguang1 2 3 YANG Yuemin3 NIU Fujun1 MENG Zhaogang4 WANG Qingbin4 and XUE Jun4
1) State Key Laboratory of Frozen Soils Engineering, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, Gansu Province, P.R.China 2) University of Chinese Academy of Sciences, Beijing 100049, P.R.China 3) Airport College of Civil Aviation University of China, Tianjin 300300, P.R.China 4) Mohe Gulian Airport, Mohe 165300, Heilongjiang Province, P.R.China
关键词:
岩土工程防灾减灾及防护工程道路与铁道工程寒区工程春融作用机场土面区
Keywords:
geotechnical engineering mitigation and protection engineering highway & railway engineering frozen soil of cold region spring-thawing effect airport soil field
分类号:
P642.14
DOI:
10.3724/SP.J.1249.2019.06621
文献标志码:
A
摘要:
为研究春融期间温升效应影响下寒区机场升降带土面区导热性能及剪切强度变化规律,制备了含水率分别为15%、17%、19%和21%,压实度分别为90%、95%和98%的冻土试样,分析了内部温度场变化、导热系数变化和快速直剪实验结果,得到了冻土试样导热性能及力学性质的变化特征,总结了春融过程对土面区工作性能的影响. 结果表明,冻土试样内部温度场在温升过程中发生了剧烈变化,冻结核的存在使其融化过程呈现4个阶段,包括快速升温期、缓和融化期、加速融化期和已融化期. 通过对12组冻土试样的导热系数变化规律分析,发现温升过程中导热系数整体下降但仍存在波动变化,与内部温度场变化规律一致. 通过分析60组冻土试样分别在环境温度为-5、-1、3、7和11 ℃时的快速直剪实验结果发现,在温升过程中压实度提高抗剪强度变大、含水率增加抗剪强度减小.
Abstract:
By considering the temperature-rising effect during spring-thawing period, the frozen soil samples with water content of 15%, 17%, 19% and 21% and compaction degrees of 90%, 95% and 98% are prepared to investigate the variation characteristics of thermal conductivity and shear strength in the soil field surface of airport lifting zone in cold region. Laboratory experiments on the frozen soil samples are conducted to achieve internal temperature changes, thermal conductivity variations and fast direct shear strengths. The characteristics of thermal conductivity and mechanical properties of the frozen soil samples are obtained and the influences of the spring-thawing effect on the working performance of airport soil field were summarized. The results show that, there are significant internal temperature variations in the frozen soil samples during the process of temperature rise. The existence of frozen core make its melting process present four stages, including rapid heating period, moderate melting variation period, accelerated melting variation period and melted period. By analyzing the thermal conductivity variation curves of twelve sets of frozen soil samples, it is found that the thermal conductivity of frozen soil samples decreases as a whole, but still fluctuates, during the temperature rising process, which is also consistent with the internal temperature field. By analyzing the results of fast direct shear tests on sixty sets of the frozen soil samples at ambient temperature of -5, -1, 3, 7 and 11 ℃, it is proved that the shearing strength increases with the increase of compaction degree and decreases with the decrease of water content significantly during the temperature rising process.

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备注/Memo

备注/Memo:
Received:2019-03-09;Accepted:2019-05-18 Foundation:National Key R&D Program of China (2018YFC1505001); Open Foundation of State Key Laboratory of Frozen Soil Engineering (SKLFSE201409); Scientific Research Project of Tianjin Municipal Education Commission (2018KJ243); Permafrost Research Project of Mohe Airport of Shoudu Airport Group (401950) Corresponding author:Associate professor LIU Guoguang. Email:ggliu@cauc.edu.cn Citation:LIU Guoguang, YANG Yuemin, NIU Fujun, et al. Influences of spring thaw on working performance of airport soil field surface in cold region[J]. Journal of Shenzhen University Science and Engineering, 2019, 36(6): 621-627.(in Chinese)
更新日期/Last Update: 2019-11-30