作　　者： ; ; ;

机构地区： 长安大学公路学院特殊地区公路工程教育部重点实验室

出　　处： 《岩土工程学报》 2007年第5期765-768,共4页

摘　　要： 在一系列的一维固结试验的基础上,探讨了压实黄土的次固结特性,分析了固结压力、固结时间、加载比和超载预压处理对次固结的影响。试验结果表明:随着固结压力的变化,压实黄土的次固结系数表现出与当前应力状态有关的变化规律。当处于正常固结状态时,次固结系数近似为一常数;而当超载预压处理后,次固结系数随超载比和超载作用时间不同而变化。同时,在正常固结状态时,次固结系数与压缩指数具有很好的相关性,且受加载比和作用时间的影响较小。 Based on a series of ID consolidation tests, the characteristics of secondary consolidation of compacted loess were studied and the influence of consolidation pressure, consolidation time, compression index and overload ratio on the coefficient of secondary consolidation was analyzed. It was indicated that with the variation of consolidation pressure, the coefficient of secondary consolidation altered regularly with the variation of stress condations. In normal consolidation state the coefficient remained approximately a constant value. But when the soil had been preloaded, the coefficient would change with the overload ratio and its duration time. Also, under normal consolidation circumstance, there was a significant correlativity between the coefficient of secondary consolidation and the compression index which would be scarcely influenced by overload ratio and its duration time.

关 键 词： 压实黄土 次固结系数 超载比

领　　域： [建筑科学] [建筑科学]