铁道科学与工程学报Issue(4)：731-736,6.
高速铁路路基粗粒土B组填料剪胀特性的大型三轴试验研究
Large -scale triaxial test study on shear dilatancy of subgrade filler of group B coarse -grained soil of high speed railway
摘要
Abstract
In order to study the dilatancy effect of group B coarse -grained soil using as high speed railway sub-grade filler,a series of group B coarse -grained soils tests were executed by the large scale triaxial shearing ap-paratus.Tests results show that both the confining pressure and coarse particle contents have obvious influences on the dilatancy of the group B coarse -grained soil.When the confining pressure is lower or coarse particle con-tents is higher,the group B coarse -grained soil amples shows shearing shrinkage.When the confining pressure are higher and coarse particle contents is lower,the group B coarse -grained soil amples shows dilatancy in the tests.Moreover,the group B coarse -grained soil contract first and then dilate during shearing when the confi-ning pressure is lower.When the confining pressure is less than 200 kPa and coarse particle contents is more than 49.31%,the group B coarse -grained soil shows obvious dilatancy tendency.Applicability of quadratic function between axial strain ε21 and lateral strain ε3 is convinced for the group B coarse -grained soil,and an experiential dilatancy criterion which is available for the group B coarse -grained soils,was set forward.The Rowe dilatancy law can commendably reflect the dilatancy of group B coarse -grained soil,and the shearing di-latancy coefficient K of Rowe is identified as 7 ~12.关键词
粗粒土B组填料/大型三轴试验/剪胀特性/粗粒含量Key words
group B coarse -grain soil/large -scale triaxial test/characteristics of dilatancy/coarse particle content分类
建筑与水利引用本文复制引用
王启云,张家生,邓国栋,孟飞,吴波..高速铁路路基粗粒土B组填料剪胀特性的大型三轴试验研究[J].铁道科学与工程学报,2015,(4):731-736,6.基金项目
国家自然科学基金资助项目（51378514）；福建省教育厅项目（JB14072）；福建省自然科学基金资助项目 （）
