摘要
依托贵州省三黎高速公路项目,针对板溪群强—中风化板岩路基填料,开展了不同围压、不同应力水平下的大型三轴湿化变形试验研究。结合现场路基动应力测试成果,对板岩路堤的湿化变形特征进行了研究,研究表明:板岩路堤湿化变形主要由路堤上部附加动应力产生的湿化变形和路堤下部自重应力产生的湿化变形组成。另外,本文对板岩路堤填料湿化变形试验的应力条件和试验方法进行了探讨,并给出了估算板岩路堤湿化变形量的数学表达式。
A large three axis wetting deformation test is carried out under the conditions of different confining pressure and different stress level in the filling material of highly to moderately decomposed slate in Banxi group for the expressway project from Sansui to Liping in Guizhou Province. The wetting deformation of slate embankment is studied through in-situ dynamic stress tests. The results show that the wet deformation is mainly composed of upper deformation caused by additional pressure and lower deformation caused by self weight stress. In addition, the stress condition and test method of the wetting deformation test Of slate embankment fill are discussed, and the mathematical expression to estimate wetting deformation of slate embankment is proposed.
出处
《工程勘察》
2017年第5期16-21,共6页
Geotechnical Investigation & Surveying
关键词
板岩
路堤
湿化变形
大型三轴试验
slate
embankment
wetting deformation
large scale three axis experiment
