气候变化领域集成服务门户(CCPortal): Monitoring and simulation of the thermal behavior of cast-in-place pile group foundations in permafrost regions

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DOI	10.1016/j.coldregions.2022.103486
	Monitoring and simulation of the thermal behavior of cast-in-place pile group foundations in permafrost regions
	Hou, Xin; Chen, Ji; Yang, Bin; Wang, Jinchang; Dong, Tianchun; Rui, Pengfei; Mei, Qihang
通讯作者	Chen, J (通讯作者)，Chinese Acad Sci, State Key Lab Frozen Soil Engn, Beiluhe Observat & Res Stn Frozen Soil Engn & Env, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Peoples R China.
发表日期	2022
ISSN	0165-232X
EISSN	1872-7441
卷号	196
英文摘要	The heat emitted in the construction process of cast-in-place (CIP) pile foundations and the subsequent cement hydration process cause a thermal disturbance in the surrounding permafrost and reduce the early load capacity. In this paper, based on monitoring and simulation, the thermal behavior of CIP pile groups in permafrost regions was analyzed. The results indicate that the overlapping thermal disturbance annuli of CIP pile foundations increased the freezeback time. With increasing overlap, the freezeback time increases. Compared to warm permafrost regions, pile foundations in low-temperature permafrost regions experience a larger thermal disturbance range, and the resultant thermal disturbance annuli are more likely to overlap, which can increase the freezing time. Large-diameter pile foundations in warm permafrost regions exhibit a larger thermal disturbance range because more hydration heat is generated, and the thermal disturbance annuli more likely overlap. The freezeback time notably increases, while the permafrost around the pile foundation has not fully recovered after ten years.
关键词	FLY-ASH PERFORMANCE EMBANKMENT CONCRETE TOWER
英文关键词	Permafrost; Cast-in-place pile foundations; Pile group; Thermal disturbance annuli; Freezeback process
语种	英语
WOS研究方向	Engineering ; Geology
WOS类目	Engineering, Environmental ; Engineering, Civil ; Geosciences, Multidisciplinary
WOS记录号	WOS:000749919900004
来源期刊	COLD REGIONS SCIENCE AND TECHNOLOGY
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/254674
作者单位	[Hou, Xin; Chen, Ji; Rui, Pengfei; Mei, Qihang] Chinese Acad Sci, State Key Lab Frozen Soil Engn, Beiluhe Observat & Res Stn Frozen Soil Engn & Env, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Peoples R China; [Hou, Xin; Mei, Qihang] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Yang, Bin] China Geol Survey, Nat Resources Comprehens Survey Command Ctr, Beijing 100055, Peoples R China; [Wang, Jinchang; Dong, Tianchun] China Railway Qinghai Tibet Grp Co Ltd, Xining 810007, Qinghai, Peoples R China
推荐引用方式 GB/T 7714	Hou, Xin,Chen, Ji,Yang, Bin,et al. Monitoring and simulation of the thermal behavior of cast-in-place pile group foundations in permafrost regions[J]. 中国科学院西北生态环境资源研究院,2022,196.
APA	Hou, Xin.,Chen, Ji.,Yang, Bin.,Wang, Jinchang.,Dong, Tianchun.,...&Mei, Qihang.(2022).Monitoring and simulation of the thermal behavior of cast-in-place pile group foundations in permafrost regions.COLD REGIONS SCIENCE AND TECHNOLOGY,196.
MLA	Hou, Xin,et al."Monitoring and simulation of the thermal behavior of cast-in-place pile group foundations in permafrost regions".COLD REGIONS SCIENCE AND TECHNOLOGY 196(2022).