三轴试验下二八灰土强度的变化规律  

Variation pattern of strength of 2∶8 lime-soil based on its triaxial test

作　　者：米海珍[1] 朱浩稳[1] 王昊[1] 

机构地区：[1]兰州理工大学土木工程学院,甘肃兰州730050

出　　处：《兰州理工大学学报》2009年第4期117-120,共4页Journal of Lanzhou University of Technology

基　　金：甘肃省自然科学基金(3ZS042-B25-031)

摘　　要：对二八灰土进行室内强度试验,分析养护龄期、含水量及浸水次数对灰土强度特性的影响.从灰土的微观机理入手对土体强度的两个指标c、φ进行分析.结果表明:灰土的养护龄期必须满足90 d才能达到其应有强度,90 d后也会有一定增长,但增长量较小;浸水对灰土的c、φ值影响显著,首次浸水使内聚力c值下降较大,以后浸水对c值影响甚微.与此不同,内摩擦角在数次浸水后(试验中为4次)才趋于稳定.Based on indoor triaxial test of 2 ： 8 lime-soil strength, the influence of its curing period, moisture capacity, times of immersion on it was analyzed and the two indices c and φ of the soil were analyzed in terms of micro-mechanism of the lime-soil. The test result showed that the lime-soil curing period must be more than 90 days to reach its due strength. After 90 days, the strength growth became slow. In addition, the immersion would have a great influence on its strength. First immersion made the cohesive force c a great decrease, but afterward, the subsequent immersion would have very minute influence on it. In contrast, the interior frictional angle φ however, approach a steady state only after several times of immersion （being four times in the test）.

关 键 词：二八灰土 强度变化 三轴试验 浸水试验 

分 类 号：TU411[建筑科学—岩土工程]