改装应变控制式三轴仪在减载土体中的应用  

Transformed Triaxial Apparatus of Strain Control and Its Application in Soil Unloading

作　　者：何怡[1] 苏丽娜[1] 庄心善[2] 

机构地区：[1]洛阳理工学院土木工程系,河南洛阳471023 [2]湖北工业大学土木工程与建筑学院,湖北武汉430068

出　　处：《水电能源科学》2010年第6期36-38,共3页Water Resources and Power

基　　金：湖北省自然科学基金资助项目(2002AB001);湖北省教育厅基金资助项目(2002A00015)

摘　　要：针对基坑开挖卸荷的实际应力状态,改造了常规应变控制式三轴仪,设计了符合基坑开挖过程中侧向减载土体受力特点的三轴试验方法,通过对武汉地区饱和粉质粘土进行排水条件下侧向减载的普通三轴试验,获得土体应力应变、体应变轴向应变及轴向应变-水平向应变关系曲线。试验结果表明,改装后的应变控制式三轴仪可代替应力控制式三轴仪实现土体侧向卸荷应力路径的模拟。According to the actual unloading stress status of foundation pit excavation,normal triaxial apparatus of strain control is transformed and triaxial test method is designed for conforming to the mechanical characteristics of soil sidewise unloading during excavation process.Under drainage condition,the relationship curves between soil stress and strain,volume strain and axial strain,axial strain and horizontal strain are obtained by the triaxial test of sidewise unloading for saturated silty clay in Wuhan D...

关 键 词：基坑开挖 侧向卸荷 改装应变控制式三轴仪 普通三轴试验 应用研究 

分 类 号：TU411.3[建筑科学—岩土工程]