气候变化领域集成服务门户(CCPortal): Correctness of formulation and solution of thermotechnical problems in forecasting temperature field dynamics in the foundations of constructions on permafrost

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DOI	10.21782/KZ1560-7496-2017-3(49-59)
	Correctness of formulation and solution of thermotechnical problems in forecasting temperature field dynamics in the foundations of constructions on permafrost
	Gorelik J.B.; Pazderin D.S.
发表日期	2017
ISSN	15607496
卷号	21 期号:3
英文摘要	The paper discusses correctness of choice of boundary conditions for upper and lower bounds of the rated operating conditions, along with the problem of matching the lower boundary position. Choice of boundary conditions can significantly influence results of numerical solution of the problems of forecasting the temperature field dynamics in the foundations of engineering structures in permafrost regions. It has been demonstrated by specific numerical tests that the incorrectly specified parameters of the upper boundary may lead to unreasonable cooling effect of the foundation, with the predicted thawing depth being underestimated by several times in comparison with actual one. Similarly, the "predicted" surface warming effect may not take place in reality. The wrong choice of the lower boundary position of the rated operating conditions can therefore significantly exacerbate these effects. The procedure for correct choice of parameters of the upper boundary condition for the soil surface-atmosphere contact is proposed. The procedure is based on iterative fitting of the condition parameters (and related calculation results) using a limited set of observed data - temperature at depth of zero amplitude and seasonal thaw depth - available from the construction surveys. The study also addresses the problems of testing the developed algorithms and software products for the purpose of forecasting the thermal state of the construction foundations.
英文关键词	Active layer; Boundary conditions stationary solutions; Depth of zero amplitude; Frozen ground; Phase transitions; Thermal engineering calculations
学科领域	active layer; amplitude; boundary condition; forecasting method; foundation; frozen ground; permafrost; phase transition; temperature
语种	英语
scopus关键词	active layer; amplitude; boundary condition; forecasting method; foundation; frozen ground; permafrost; phase transition; temperature
来源期刊	Earth's Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/119510
作者单位	Earth Cryosphere Institute, SB RAS, P/O box 1230, Tyumen, 625000, Russian Federation; OOO Gazpromneft-Yamal, 8B, 50 let Oktyabrya str., Tyumen, 625048, Russian Federation
推荐引用方式 GB/T 7714	Gorelik J.B.,Pazderin D.S.. Correctness of formulation and solution of thermotechnical problems in forecasting temperature field dynamics in the foundations of constructions on permafrost[J],2017,21(3).
APA	Gorelik J.B.,&Pazderin D.S..(2017).Correctness of formulation and solution of thermotechnical problems in forecasting temperature field dynamics in the foundations of constructions on permafrost.Earth's Cryosphere,21(3).
MLA	Gorelik J.B.,et al."Correctness of formulation and solution of thermotechnical problems in forecasting temperature field dynamics in the foundations of constructions on permafrost".Earth's Cryosphere 21.3(2017).