土体的“锅盖效应”  

POT-COVER EFFECT OF SOIL

作　　者：李强 姚仰平[2] 韩黎明 胡晶[2] 彭仁[2] 王乃东[2] 

机构地区：[1]中国民航机场建设集团公司,北京100101 [2]北京航空航天大学,北京100191

出　　处：《工业建筑》2014年第2期69-71,共3页Industrial Construction

基　　金：国家重点基础研究发展计划(973计划)项目(2014CB047000)

摘　　要：通过对西部某机场道面产生不均匀沉陷问题的分析,发现机场建成后出现病害的原因之一是土的"锅盖效应"。在对土的"锅盖效应"形成机理分析的基础上,指出:即使在干旱低水位地区,"锅盖效应"也可引起地表隔气层下土体含水量升高,从而导致该类场地出现不均匀沉降和冻胀等灾害,这种地质现象应引起高度重视。Depending on. the analysis of the differential settlement issue in an airport buih in west China, it was found that pot-cover effect was one of the most important causes of damages in built airport. Based on the mechanism of pot- cover effect, it was poinied out that even in arid area with low underground water level, pot-cover effect could also increase the water content of the soil beneath the nonporous cladding, which would lead to differential settlement, frost heaving or other disasters in such field. So, much attention should be paid to thaw geological phenomenon.

关 键 词：非饱和土 锅盖效应 隔气层 冻胀 

分 类 号：TU43[建筑科学—岩土工程]