气候变化领域集成服务门户(CCPortal): Physical Model Test and Heat Transfer Analysis on Backfilling Construction of Qinghai-Tibet Transmission Line Tower Foundation

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DOI	10.3390/en15072329
	Physical Model Test and Heat Transfer Analysis on Backfilling Construction of Qinghai-Tibet Transmission Line Tower Foundation
	Zhang, Jun; Zhou, Chenglin; Zhang, Ze; Melnikov, Andrey; Jin, Doudou; Zhang, Shengrong
通讯作者	Zhang, Z (通讯作者)，Northeast Forestry Univ, Sch Civil Engn, Inst Cold Reg Sci & Engn, Northeast China Observ,Minist Educ, Harbin 150040, Peoples R China. ; Zhang, Z (通讯作者)，Northeast Forestry Univ, Res Stn Permafrost Geoenvironm, Minist Educ, Harbin 150040, Peoples R China.
发表日期	2022
EISSN	1996-1073
卷号	15 期号:7
英文摘要	The cone-cylindrical pile foundation is a kind of shallow buried foundation, which needs to be open excavated and backfilled during construction. The density of the backfill is closely related to the refreezing process of the backfill. However, there is still a lack of relevant research on the relationship between backfill density and the refreezing process of backfill. The method of model experiment is selected to study the refreezing process of backfill under three backfill soil densities. The controlled density of backfill is 1.83, 1.62 and 1.36 g/cm(3), and the times of freeze-thaw cycle is 14, 22 and 39, respectively. The main research findings are as follows: First, the effect of the initial temperature of the backfill on the refreezing is mainly reflected in the first three freeze-thaw cycles; the second is that the higher the density of the backfill, the faster the backfill responds to changes in outside air temperature, and the shorter the freezing time; third, the pile foundation is a good conductor of heat, which will cause the soil temperature change on the pile side to be significantly greater than that of the natural soil, and the temperature change of the pile foundation surface is greater than that of the backfill. The research results can provide a reference for the backfill construction of pile foundations in cold regions and the selection of boundary conditions for related numerical simulations.
关键词	PERMAFROST REGIONS STABILITY THERMOSIPHONS FOOTINGS PILES
英文关键词	refreezing process; foundation backfill; freeze-thaw cycles; permafrost region
语种	英语
WOS研究方向	Energy & Fuels
WOS类目	Energy & Fuels
WOS记录号	WOS:000780577400001
来源期刊	ENERGIES
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254922
作者单位	[Zhang, Jun; Zhang, Ze; Jin, Doudou; Zhang, Shengrong] Northeast Forestry Univ, Sch Civil Engn, Inst Cold Reg Sci & Engn, Northeast China Observ,Minist Educ, Harbin 150040, Peoples R China; [Zhang, Jun; Zhang, Ze; Jin, Doudou; Zhang, Shengrong] Northeast Forestry Univ, Res Stn Permafrost Geoenvironm, Minist Educ, Harbin 150040, Peoples R China; [Zhou, Chenglin] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Peoples R China; [Melnikov, Andrey] Russian Acad Sci, Melnikov Permafrost Inst, Siberian Branch, Yakutsk 677010, Russia
推荐引用方式 GB/T 7714	Zhang, Jun,Zhou, Chenglin,Zhang, Ze,et al. Physical Model Test and Heat Transfer Analysis on Backfilling Construction of Qinghai-Tibet Transmission Line Tower Foundation[J]. 中国科学院西北生态环境资源研究院,2022,15(7).
APA	Zhang, Jun,Zhou, Chenglin,Zhang, Ze,Melnikov, Andrey,Jin, Doudou,&Zhang, Shengrong.(2022).Physical Model Test and Heat Transfer Analysis on Backfilling Construction of Qinghai-Tibet Transmission Line Tower Foundation.ENERGIES,15(7).
MLA	Zhang, Jun,et al."Physical Model Test and Heat Transfer Analysis on Backfilling Construction of Qinghai-Tibet Transmission Line Tower Foundation".ENERGIES 15.7(2022).