膨胀土增湿变形规律及计算公式  

Deformation of Expansive Soils due to Moistening and its Formula

作　　者：丁振洲[1] 李利晟[2] 郑颖人[1] 

机构地区：[1]后勤工程学院建筑工程系,重庆400041 [2]广州军区空军后勤部机场营房处,广州510052

出　　处：《工程勘察》2006年第7期13-16,34,共5页Geotechnical Investigation & Surveying

基　　金：广州军区空军后勤部资助项目(KJYZ0511)

摘　　要：通过对仪器改进实施了不同程度增湿对膨胀变形影响方面的试验,结果表明:无荷及有荷膨胀率均与增湿程度有关,呈近似线性正相关关系。对影响膨胀土胀缩变形的起始干密度、起始含水率及上覆压力水平分别作了试验研究及相关性分析,得到了各影响因素单独变化时膨胀率的变化规律及其公式,并给出了各因素综合影响的膨胀土增湿变形的一般性建议公式。The deformation trial test due to moistening to expansive soil has been carried out using improved instrument. The results indicates that the non-load and load swelling ratio are related to moistening degree and the relationship is linear. The test research and relevant correlation analysis are carried out to the influence factors on expansive soil＇ s swelling-shrinking deformation, i.e. primary dry density, primary moisture content, vertical press and so on. The formula of swelling ratio vs. single factor is first obtained and the recommended universal formula on deformation of expansive soil due to moistening is then given in the paper.

关 键 词：膨胀率 膨胀土 胀缩变形 

分 类 号：TU443[建筑科学—岩土工程] TU411[建筑科学—土工工程]