干旱区生态环境知识资源中心(Arid): 锅盖效应的形成机制及其防治

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	锅盖效应的形成机制及其防治
其他题名	MECHANISM OF FORMING POT-COVER EFFECT AND ITS PREVENTION
	姚仰平; 王琳; 王乃东; 贾峻峰
来源期刊	工业建筑
ISSN	1000-8993
出版年	2016
卷号	46 期号:9 页码:1-5
中文摘要	锅盖效应是指非饱和土中由于上覆结构密闭导致水分不能排出而引起的浅层土体含水率增加的现象。干旱、半干旱寒冷地区地下水位低,毛细作用向上输水范围有限,几乎不能直接补充土体浅层水分。故认为锅盖效应水分主要来源于温差驱动迁移而来的气态水在浅层土体中形成的冷凝或冷冻水。通过对冷凝或冷冻条件下锅盖效应的室内试验,结合试验数据对锅盖效应进行分析,提出相应的灾害防治方法。结合锅盖效应的形成机理,分析哈大高铁冻胀问题并给出了相应的建议。
英文摘要	When the surface of the unsaturated soils is covered by a water and air proof layer,the water content of the shallow soils will increase with time. This phenomenon is considered as the pot-cover effect by the authors. In the cold semi-arid or arid area,the capillarity can not cause this rise of water content as the extremely low water table. It is analyzed by authors that the pot-cover effect is mainly reasoned by the condensation (desublimation) of the vaporous water moved by the underground gradient of temperature. Moreover,the laboratory tests were done, and the mechanism of the pot-cover effect was analyzed by combining the tests data,and the corresponding prevention method was developed. At last,the reasons and some prevention comments of the frost heaving disaster of Harbin-Dalian high-speed railway in China were discussed based on the mechanism of the pot-cover effect.
中文关键词	非饱和土 ; 锅盖效应 ; 冷凝或冷冻 ; 试验分析 ; 灾害防治
英文关键词	unsaturated soils pot-cover effect condensation (freeze) experimental analysis disaster prevention
语种	中文
国家	中国
收录类别	CSCD
WOS类目	CONSTRUCTION BUILDING TECHNOLOGY
WOS研究方向	Construction & Building Technology
CSCD记录号	CSCD:5799199
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/234417
作者单位	北京航空航天大学交通科学与工程学院, 北京 100191, 中国
推荐引用方式 GB/T 7714	姚仰平,王琳,王乃东,等. 锅盖效应的形成机制及其防治[J],2016,46(9):1-5.
APA	姚仰平,王琳,王乃东,&贾峻峰.(2016).锅盖效应的形成机制及其防治.工业建筑,46(9),1-5.
MLA	姚仰平,et al."锅盖效应的形成机制及其防治".工业建筑 46.9(2016):1-5.