气候变化领域集成服务门户(CCPortal): Effect of freeze-thaw cycles on the performance of cast-in-place piles in permafrost regions: Working state and action effect sharing

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DOI	10.1002/ppp.2140
	Effect of freeze-thaw cycles on the performance of cast-in-place piles in permafrost regions: Working state and action effect sharing
	Shi, Rui; Wen, Zhi; Li, Desheng; Gao, Qiang; Wei, Yanjing
通讯作者	Wen, Z (通讯作者)，Chinese Acad Sci, State Key Lab Frozen Soil Engn, Northwest Inst Ecoenvironm & Resources, Dong Gang West Rd 320, Lanzhou 730000, Gansu, Peoples R China.
发表日期	2020
ISSN	1045-6740
EISSN	1099-1530
英文摘要	Owing to a minor thermal disturbance to the permafrost environment, cast-in-place piles are widely used for building and bridge foundations in permafrost regions. However, because of the dynamic and cyclic variation in frozen ground affected by the atmosphere, the load transfer mechanism is not yet clear, and the current design is economically insufficient. To illustrate the bearing pattern of cast-in-place piles subjected to freeze-thaw cycles, a systematic in situ investigation was carried out. Results show that the load from the superstructure has a marginal action effect, while freeze-thaw cycles have a more significant action effect. Freeze-thaw cycles have a decisive effect on the dynamic variations of the pile's working state and action effect sharing while the mechanisms are quite different, which vary with depths. Action effect sharing of the pile shaft and tip experiences a cyclic variation and is affected by the long-term effect of freeze-thaw cycles. The shaft takes an increasing sharing proportion gradually and has a 19% rise after two freeze-thaw cycles, while the pile tip goes the opposite way. Two years after the building is completed, the bearing capacity is almost entirely provided by shaft resistance and mainly by the upper one-third of the pile. This research clarifies several essential issues about the bearing pattern and provides solid scientific support and novel opinions for the pile design in permafrost regions.
英文关键词	action effect sharing; cast-in-place pile; freeze-thaw cycles; permafrost; working state changing
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geology
WOS记录号	WOS:000762112000001
来源期刊	PERMAFROST AND PERIGLACIAL PROCESSES
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/253909
作者单位	[Shi, Rui; Wen, Zhi; Gao, Qiang; Wei, Yanjing] Chinese Acad Sci, State Key Lab Frozen Soil Engn, Northwest Inst Ecoenvironm & Resources, Dong Gang West Rd 320, Lanzhou 730000, Gansu, Peoples R China; [Shi, Rui; Gao, Qiang; Wei, Yanjing] Univ Chinese Acad Sci, Beijing, Peoples R China; [Wen, Zhi] Lanzhou Jiaotong Univ, Sch Civil Engn, Lanzhou, Gansu, Peoples R China; [Li, Desheng] Shanghai Jiao Tong Univ, State Key Lab Ocean Engn, Shanghai, Peoples R China
推荐引用方式 GB/T 7714	Shi, Rui,Wen, Zhi,Li, Desheng,et al. Effect of freeze-thaw cycles on the performance of cast-in-place piles in permafrost regions: Working state and action effect sharing[J]. 中国科学院西北生态环境资源研究院,2020.
APA	Shi, Rui,Wen, Zhi,Li, Desheng,Gao, Qiang,&Wei, Yanjing.(2020).Effect of freeze-thaw cycles on the performance of cast-in-place piles in permafrost regions: Working state and action effect sharing.PERMAFROST AND PERIGLACIAL PROCESSES.
MLA	Shi, Rui,et al."Effect of freeze-thaw cycles on the performance of cast-in-place piles in permafrost regions: Working state and action effect sharing".PERMAFROST AND PERIGLACIAL PROCESSES (2020).