气候变化领域集成服务门户(CCPortal): Improvement of the Thermomechanical Stability of an Embankment with Suprapermafrost Taliks by Engineering Remedial Countermeasures

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DOI	10.1061/(ASCE)CR.1943-5495.0000269
	Improvement of the Thermomechanical Stability of an Embankment with Suprapermafrost Taliks by Engineering Remedial Countermeasures
	Wang, Honglei; Sun, Zhizhong; Liu, Minghao; Liu, Yongzhi
通讯作者	Sun, ZZ (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Gansu, Peoples R China. ; Sun, ZZ (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Da Xinganling Observat & Res Stn Frozen Ground En, Jiagedaqi 165000, Heilongjiang, Peoples R China.
发表日期	2021
ISSN	0887-381X
EISSN	1943-5495
卷号	35 期号:4
英文摘要	To improve the embankment stability and ensure the operational safety of the Qinghai-Tibet Railway, certain engineering remedial countermeasures (ERCs) based on active cooling have been being implemented since 2006. In this study, the thermomechanical stability of an embankment was investigated based on observed ground temperatures and embankment deformations before and after the remedial construction combined with crushed-rock revetment (CRR) in May 2010 and two-phase closed thermosyphon (TPCT) in November 2012. The effectiveness of the adopted ERCs was analyzed, and the results indicated that the ERCs strengthened the thermomechanical stability of the embankments. More specifically, before the remedial construction, the annual thermal fluxes near the permafrost table (PT) under the left and the right shoulders were positive across a year, indicating that the thermal budget was conspicuous, and causing that the PT moved downward significantly. After the remedial construction, the peak of annual thermal flux dropped annually and was ultimately close to 0 W center dot m(-2), indicating that the accumulation of heat near the PT decreased. Meanwhile, both the left and the right shoulders experienced settlement during the monitoring period, and the maximum settlements were 38.35 and 29.48 cm, respectively. After the remedial construction, the left and the right shoulders settlement rates and differential settlement rates dropped significantly. These variations confirmed the improvement of embankment stability caused by suprapermafrost taliks by the ERCs. The results demonstrated the feasibility of the remedial construction, combined with CRR and TPCT, as an effective countermeasure to improve the embankment stability.
关键词	RAILWAY EMBANKMENT THERMAL REGIME TIBET PLATEAU PERMAFROST DEGRADATION SETTLEMENT REGIONS
英文关键词	Thermomechanical stability; Suprapermafrost taliks; Countermeasures; Crushed-rock revetment; Two-phase closed thermosyphon
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:000708121500002
来源期刊	JOURNAL OF COLD REGIONS ENGINEERING
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/253630
作者单位	[Wang, Honglei; Sun, Zhizhong; Liu, Minghao; Liu, Yongzhi] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Gansu, Peoples R China; [Wang, Honglei] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Sun, Zhizhong] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Da Xinganling Observat & Res Stn Frozen Ground En, Jiagedaqi 165000, Heilongjiang, Peoples R China
推荐引用方式 GB/T 7714	Wang, Honglei,Sun, Zhizhong,Liu, Minghao,et al. Improvement of the Thermomechanical Stability of an Embankment with Suprapermafrost Taliks by Engineering Remedial Countermeasures[J]. 中国科学院西北生态环境资源研究院,2021,35(4).
APA	Wang, Honglei,Sun, Zhizhong,Liu, Minghao,&Liu, Yongzhi.(2021).Improvement of the Thermomechanical Stability of an Embankment with Suprapermafrost Taliks by Engineering Remedial Countermeasures.JOURNAL OF COLD REGIONS ENGINEERING,35(4).
MLA	Wang, Honglei,et al."Improvement of the Thermomechanical Stability of an Embankment with Suprapermafrost Taliks by Engineering Remedial Countermeasures".JOURNAL OF COLD REGIONS ENGINEERING 35.4(2021).