期刊论文

中文

水利水电技术(中英文)

1000-0860

2019

50

1

142-153

10.13928/j.cnki.wrahe.2019.01.019

2018JJ4007:湖南省自然科学基金-株洲市联合基金 51508042:国家自然科学基金

本校为其他机构

为了探究某高速公路工程中非饱和花岗岩残积土动力荷载作用下的变形特性,以衡阳非饱和花岗岩残积土为研究对象,采用美国GCTS公司的USTX-2000非饱和土/饱和土动静三轴试验系统进行了非饱和动三轴试验,并利用Janbu公式进行了拟合。分析了吸力、净围压等对非饱和花岗岩残积土的变形特性的影响,并对其相应的本构关系及模型参数进行了探讨。结果表明:在吸力一定情况下,动应力应变骨干曲线呈双曲线型,骨干曲线随着净围压增大向上移动,不同净围压情况下,其与吸力未呈明显的相关关系;净围压相同时,非饱和花岗岩残积土的最大动弹性模量随动应变增大而减小;吸力一定条件下,最大动弹性模量随着净围压的增大...

In order to explore the deformation characteristics of the unsaturated granite residual soils under dynamic load in a highway project, an unsaturated dynamic triaxial test is carried out with GCTS USTX-2000 static and dynamic triaxial test system for unsaturated and saturated soils by taking the unsaturated residual granite soils in Hengyang as the study object, for which relevant fitting curves is made with Janbu formula. The effects of suction and net confining pressure on the deformation characteristics of unsaturated granite residual soil are analyzed, and the corresponding constitutive re...