Cooling performance of two-phase closed thermosyphons installed at a highway embankment in permafrost regions

被引：66

作者：

Yu, Fan ^{[1
]}

Qi, Jilin ^{[2
]}

Zhang, Mingyi ^{[1
]}

Lai, Yuanming ^{[1
,3
]}

Yao, Xiaoliang ^{[1
]}

Liu, Yongzhi ^{[1
,4
]}

Wu, Guilong ^{[1
,4
]}

机构：

[1] Chinese Acad Sci, State Key Lab Frozen Soil Engn, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China

[2] Beijing Univ Civil Engn & Architecture, Beijing High Inst Res Ctr Engn Struct & New Mat, Beijing 100044, Peoples R China

[3] Lanzhou Jiaotong Univ, Sch Civil Engn, Lanzhou 730070, Peoples R China

[4] Chinese Acad Sci, Beiluhe Observat Stn Frozen Soil Environm & Engn, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China

来源：

APPLIED THERMAL ENGINEERING | 2016年 / 98卷

基金：

中国国家自然科学基金;

关键词：

Two-phase closed thermosyphon; Ground temperature; Permafrost degradation; Embankment deformation; Crack formation; Thaw consolidation; QINGHAI-TIBET HIGHWAY; HEAT-TRANSFER CHARACTERISTICS; IN-SITU; PLATEAU; SETTLEMENT; EXPANSION; CHINA;

D O I：

10.1016/j.applthermaleng.2015.11.102

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Two-phase closed thermosyphon (TPCT) is a popular way to prevent permafrost layers from degrading, and consequently ensure the stabilities of engineering constructions in permafrost regions. Although TPCTs have been numerically and experimentally investigated for many years, long-term field monitored data concerning the cooling performance of TPCTs are limited. This paper presents the ground temperatures, embankment deformations and some related meteorological factors for a road section of the Qinghai-Tibet Highway before and after installing the TPCTs in permafrost regions. Based on the monitored data, three main aspects are analyzed: 1) cooling scope and period of the TPCTs; 2) cooling effects for the soil layers, especially for the permafrost layers; and 3) remedying effects with respect to embankment deformation and crack formation. Some corresponding suggestions are proposed for a better design of TPCTs in the construction of roadways in permafrost regions. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：220 / 227

页数：8

共 45 条

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