土体剖面温度物理模型试验研究

唐朝生; 施斌; 高磊; 顾凯; 刘春

土体剖面温度物理模型试验研究

南京大学地球科学与工程学院南京 210093

基金项目:

国家自然科学基金重点项目(40730739)

详细信息

作者简介:
唐朝生,主要从事工程地质和环境工程研究工作.Email:tangchaosheng@nju.edu.cn

中图分类号: TU411.1
计量
- 文章访问数: 3424
- HTML全文浏览量: 148
- PDF下载量: 1558
- 被引次数: 0
出版历程
- 收稿日期: 2009-07-24
- 修回日期: 2010-07-05
- 刊出日期: 2010-12-25

PHYSICAL MODEL TESTING OF TEMPORAL VARIATION OF SOIL TEMPERATUE IN DEPTH

School of Earth Sciences and Engineering,Nanjing University,Nanjing 210093

摘要

摘要: 利用自主开发的土体温度物理模型试验系统,研究了土体剖面温度随时间的变化规律,通过改变土体表面的覆盖层属性,对比分析了裸土和混凝土板覆盖下土体剖面的热传递特点。结果表明:在恒定热源作用下,土体剖面温度迅速上升到一定值之后逐渐趋于稳定,初始升温速率随深度的增加而呈指数递减,最终平衡温度随深度的增加而显著衰减; 温度在土体剖面上的传递存在明显的滞后效应; 混凝土板覆盖下土体的初始升温速率和最终平衡温度较裸土高; 土体剖面热通量反映了土体中热量的传递特征,其变化规律与上下土层间的温度差变化规律一致。
- 土体剖面 /
- 土体温度 /
- 物理模型 /
- 热传导 /
- 热通量
Abstract: A physical model experimental system is developed in order to investigate the temperature variation with time in soil depth profile.The thermal conduction characteristics in soil profile with different surface covers but under the same heat source are compared and analyzed.The obtained results show that (a)the soil temperature increases quickly at the beginning stage and then tends to a relative stable value; (b)with increasing depth,the initial temperature increase rate of soil decreases exponentially; and (c)the final equilibrium temperature of soil also decreases with increasing depth.It is observed that the damping and retarding effects of soil temperature with depth are obvious.By comparing with bare soil,the initial temperature increase rate and final equilibrium temperature of soil with surface concrete plate cover are higher.The thermal flux in soil profile,which is measured by thermal flux plate,reflects the thermal conduction characteristics in time,and directly depends on the variation of temperature gradient between soil layers.
- Soil profile /
- Soil temperature /
- Physical model /
- Thermal conduction /
- Thermal flux

HTML全文

参考文献(1)

[1] Laguros J.G.Effect of temperature on some engineering properties of clay soils .Int.Conf.Effects of Temperature and Heat on Engineering Behaviour of Soils.Highway Research Board Publishers,Washington,D.C. ,Spec.Rep. ,1969, 103 : 186～193.

[2] Ctori P.The effects of temperature on the physical properties of cohesive soil
[J].Ground Engineering, 1989, 22 (5): 26～27.

[3] Bruyn D.D. ,Thimus J.F. The influence of temperature on mechanical characteristics of Boom clay: The results of an initial laboratory programme
[J].Engineering Geology, 1996, 41 : 117～126.

[4] Wu J,Nofziger D.L..Incorporating temperature effects on pesticide degradation into a management model
[J]. J.Environ.Qual. ,1999, 28 : 92～100.

[5] Hillel D..Introduction to environmental soil physics
[M].USA: Elsevier Academic Press, 2004.

[6] Mihalakakou G..On estimating soil surface temperature profiles
[J].Energy and Buildings, 2002, 34 : 251～259.

[7] Yun T.S. ,Santamarina J C.Fundamental study of thermal conduction in dry soils
[J].Granular Matter, 2008, 10 : 197～207.

[8] Wierenga P.J. ,Nielsen D.R. ,Hagan R.M.Thermal properties of soil based upon field and laboratory measurements
[J]. Soil Science Society of America Proceedings, 1969,(33): 354～360.

[9] 刘为民, 何平,张钊.土体导热系数的评价与计算
[J].冰川冻土, 2002, 249 (6): 770～773.
Liu Weimin,He Ping,Zhang Zhao.A calculation method of thermal conductivity of soils.Journal of Glaciology and Geocryology, 2002, 249 (6): 770～773.

[10] Krishnaiah S. Determination of influence of various parameters on thermal properties of soils
[J]. Int.Comm.Heat Mass Transfer, 2003, 30 (6): 861～870.

[11] Cosenza P.,Guerin R. ,Tabbagh A. Relationship between thermal conductivity and water content of soils using numerical modeling
[J]. European Journal of Soil Science, 2003, 54 : 581～587.

[12] 李守巨, 范永思,张德岗,等.岩土材料导热系数与孔隙率关系的数值模拟分析
[J].岩土力学, 2007, 28 (增): 244～248.
Li Shouju,Fan Yongsi,Zhang Degang,et al.Numerical simulation of relationship between thermal conductivity of geotechnical material and its porosity.Rock and Soil Mechanics, 2007, 28 (supp.): 244～248.

[13] 张延军, 于子望,黄芮,等.岩土热导率测量和温度影响研究
[J].岩土工程学报, 2009, 31 (2): 213～217.
Zhang Yanjun,Yu Ziwang,Huang Rui,et al.Measurement of thermal conductivity and temperature effect of geotechnical materials.Chinese Journal of Geotechnical Engineering, 2009, 31 (2): 213～217.

[14] 胡增辉. 地铁围岩传热机理及其温度场演化规律研究 .南京大学, 2008.
Hu Zenghui. The study on heat transfer mechanism and temperature variation in earth surrounding subways. Nanjing University, 2008.

[15] Li Q.,Zhang H. ,Liu X. ,Huang J. Urban heat island effect on annual mean temperature during the last 50 years in China
[J].Theor.Appl.Climatology, 2004, 79 : 165～174.

[16] Chudnovsky A.,Ben-Dor E. ,Saaroni H..Diurnal thermal behavior of selected urban objects using remote sensing measurements
[J].Energy and Buildings, 2004, 36 : 1063～1074.

[17] Ochsner T.E. ,Sauer T.J. ,Horton R. Field tests of the soil heat flux plate method and some alternatives
[J]. Agron.J.,2006, 98 : 1005～1014.

[18] Sauer T.J. ,Ochsner T.E. ,Horton R. Soil heat flux plates: Heat flow distortion and thermal content resistance
[J].Agron.J. ,2007, 99 : 304～310.

[19] Sauer T.J. ,Meek D.W. ,Ochsner T.E. ,et al.Errors in heat flux measurement by flux plates of contrasting design and thermal conductivity
[J].Vadose Zone J. ,2003, 2 : 580～588.

施引文献

资源附件(0)

访问统计