基坑回弹时间效应的试验研究  

TEST RESEARCH ON TIME EFFECT OF FOUNDATION PIT REBOUND

作　　者：刘国彬[1] 贾付波[1] 

机构地区：[1]同济大学地下建筑与工程系,上海200092

出　　处：《岩石力学与工程学报》2007年第A01期3040-3044,共5页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金资助项目(10102015)

摘　　要：软土基坑开挖时,坑底土体的隆起存在明显的时间效应。利用三轴流变试验仪,模拟基坑开挖时坑底土体的应力路径,进行卸载流变试验,并提出一个五元件模型对试验结果进行模拟。模拟结果显示,拟合曲线与试验曲线基本吻合,该模型可作为淤泥质黏土在卸载条件下的流变学模型,对基坑隆起变形的预测有指导意义。Time effects obviously exist in the foundation pit rebound in soft ground.The triaxial unloading creep tests on soft clay in Shanghai is described;and the unloading stress path is designed to be close to the field stress path of the soil in the bottom of foundation pit.A five-element model is presented based on the test results.Comparisons between test curves and the ones derived from the model are conducted.The results show that two of them are very close to each other.

关 键 词：土力学 流变试验 基坑回弹 弹性后效 元件模型 

分 类 号：TU43[建筑科学—岩土工程]