[1]陈之祥,李顺群,夏锦红,等.基于紧密排列土柱模型的冻土热参数计算[J].深圳大学学报理工版,2017,34(4):393-399.[doi:10.3724/SP.J.1249.2017.04393]
　Chen Zhixiang,Li Shunqun,Xia Jinhong,et al.Calculation of thermal parameters of frozen soil based on the closely spaced soil column model[J].Journal of Shenzhen University Science and Engineering,2017,34(4):393-399.[doi:10.3724/SP.J.1249.2017.04393]
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基于紧密排列土柱模型的冻土热参数计算()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第34卷
期数:
2017年第4期
页码:
393-399
栏目:
土木建筑工程
出版日期:
2017-07-10

文章信息/Info

Title:
Calculation of thermal parameters of frozen soil based on the closely spaced soil column model
文章编号:
201704009
作者:
陈之祥1; 2;  李顺群1; 2;  夏锦红3;  王凯1; 2;  桂超3
1）天津城建大学土木工程学院，天津 300384
2）天津市软土特性与工程环境重点实验室，天津 300384
3）新乡学院土木工程与建筑学院，河南新乡 453003
Author(s):
Chen Zhixiang1; 2;  Li Shunqun1; 2;  Xia Jinhong3;  Wang Kai1; 2;  and Gui Chao3
1) School of Civil Engineering, Tianjin Chengjian University, Tianjin 300384, P.R.China
2) Tianjin Key Laboratory of Soft Soil Characteristics and Engineering Environment, Tianjin 300384, P.R.China
3) School of Civil Engineering and Architecture, Xinxiang University, Xinxiang 453003, Henan Province, P.R.China
关键词:
岩土工程; 冻土; 热参数; 土柱模型; 温度场; 未冻水; 潜热
Keywords:
geotechnical engineering;  frozen soil;  thermal parameters;  soil column model;  temperature field;  unfrozen water;  latent heat
分类号:
TU 752
DOI:
10.3724/SP.J.1249.2017.04393
文献标志码:
A
摘要:
为评估热参数对饱和冻土瞬态温度场的影响，分析冻土温度场的影响因素，提出一种最紧密排列的土柱几何模型，土柱外部被自由水充满．假定冻结在土柱围合区域的中心产生并呈柱状发展，根据任意时刻单元体内部土、水和冰的体积构成，依据Johansen的预估土体导热系数计算方法，建立未冻水含量与导热系数之间的计算关系．依据比热加权计算的原理，结合土体的相对密度及水和冰的密度，获取了土柱模型在不同冻结时刻各相的质量比，确定了未冻水含量与比热之间的计算关系．依据不同冻结时刻土柱模型中的未冻水含量，建立潜热随冻结时刻的变化关系．根据实测粉质黏土的导热系数，结合土柱模型获取其比热、潜热随温度的变化关系．将获取的不同温度下的导热系数、比热和潜热值代入数值计算软件ABAQUS，获取了冻土温度场的计算值．将该计算值与实测值进行对比，表明基于该模型获取的计算热参数值能够较好地预测冻土温度场．
Abstract:
In order to evaluate the influence of thermal parameters on the calculation of transient temperature field of saturated frozen soil, the influencing factors of frozen soil temperature field are analyzed. A kind of soil column geometric model is put forward, and the outside of the soil column is filled with pore water. Assuming that the freezing occurs at the center of the enclosing area of the soil column and develops in column form, according to the calculation of the volume of soil, water and ice in the body at any time, and the calculation method of the soil thermal conductivity of Johansen, the relationship between the unfrozen water content and the thermal conductivity is established. According to the weighting calculation principle of specific heat and the relative density of soil and the density of water and ice, the mass ratio of soil column in different freezing time is obtained, then the relationship between unfrozen water content and specific heat is determined. According to the unfrozen water content of soil column model at different freezing time, the relationship between latent heat and freezing time is established. Based on the measured thermal conductivity and the soil column model, the relationship between specific heat and latent heat with negative temperature is obtained. The thermal conductivity, specific heat and latent heat of frozen soil under different negative temperature conditions obtained from the model are analyzed by numerical calculation software ABAQUS, and the calculated values of frozen soil temperature field are obtained. Comparing the calculated values with the measured results, it is shown that the thermal parameters obtained from the model can predict the temperature field of frozen soil.

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备注/Memo

备注/Memo:
Received：2017-01-11；Accepted：2017-02-23
Foundation：National Natural Science Foundation of China (41472253); Key Project of Natural Science Foundation of Tianjin City (6JCZDJC39000); Tianjin Construction System Science and Technology Project Development Plan (2016-25)
Corresponding author：Professor Li Shunqun. E-mail: lishunqun@yeah.net
Citation：Chen Zhixiang, Li Shunqun, Xia Jinhong,et al. Calculation of thermal parameters of frozen soil based on the closely spaced soil column model［J］. Journal of Shenzhen University Science and Engineering, 2017, 34(4): 393-399.（in Chinese）
基金项目：国家自然科学基金资助项目（41472253）；天津市自然科学基金重点资助项目（16JCZDJC39000）；天津市建设系统科学技术资助项目（2016-25）
作者简介：陈之祥（1990—），男，天津城建大学硕士研究生. 研究方向：土的本构关系. E-mail：chen_zhixiang@126.com
引文：陈之祥, 李顺群, 夏锦红，等.基于紧密排列土柱模型的冻土热参数计算［J］. 深圳大学学报理工版，2017，34(4)：393-399.
更新日期/Last Update: 2017-06-26