板岩路堤填料湿化变形特性大型三轴试验研究  

Large scale three axis experimental study on the wetting deformation characteristics of slate embankment filling

作　　者：张静波[1] 陈兴[1] 吕岩松 杨露 江洎洧[3] 

机构地区：[1]中交第二公路勘察设计研究院有限公司,武汉430056 [2]贵州高速公路集团有限公司,贵阳550004 [3]长江科学院水利部岩土力学与工程重点实验室,武汉430010

出　　处：《工程勘察》2017年第5期16-21,共6页Geotechnical Investigation & Surveying

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.

关 键 词：板岩 路堤 湿化变形 大型三轴试验 

分 类 号：TU45[建筑科学—岩土工程] U416.1[建筑科学—土工工程]