强～中风化板溪群板岩填料干湿循环动力特性的试验研究  

Test and Study of Dynamic Characteristics of Heavy-Medium Weathered Ban Xi Group Slate Fillings under Dry-Wet Cycles

作　　者：张静波[1] 何斌[1] 吕岩松 陈羽 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市430056 [2]贵州高速公路集团有限公司贵阳市550004 [3]长江科学院水利部岩土力学与工程重点试验室武汉市430010

出　　处：《公路》2017年第11期47-52,共6页Highway

基　　金：贵州省交通运输厅科技项目,项目编号2014-122-007

摘　　要：为贯彻《公路路基设计规范》(JTG D30-2015)动力设计思想,针对贵州省三黎高速公路强~中风化板溪群板岩填料,开展了不同动应力幅值和不同干湿循环次数条件下的大型动三轴试验。试验结果表明:三黎高速公路强~中风化板岩填料的动力稳定性和干湿循环工程特性较好,是一种良好的路堤填料。另外,对软岩路堤填料的干湿循环大型动三轴试验方法进行了探讨,结果表明该试验方法还很不成熟,实际工程中开展软岩路堤现场原位测试(如E_(vd)、K_(30)、弯沉等),并寻求测试成果与动态回弹模量之间的相关性会更有意义。In order to apply the dynamic design idea of Specifications for Design of Highway Subgrades （JTG D30-2015）, in regard with the heavy-medium weathered Banxi group slate filling materials for the Sansui-Liping Expressway in Guizhou Province, large scale dynamic three axial tests are carried out under different dynamic stress amplitude and different wetting and drying cycles. Experimental results show that the heavy-medium weathered slate filler for the Sansui-Liping Expressway is a kind of good embankment filling with good dynamic stability and dry wet cycle engineering characteristics. In addition, the large scale dynamic tri-axial test method of filler for soft rock embankement under dry wet cycles is discussed, and it shows that the test method is immature. It is more meaningful to carry out in-situ test such as Evd, K30, deflection etc. for the soft rock embankment and to find the correlation between the test results and the dynamic modulus of resilience in project practice.

关 键 词：软岩 填料 干湿循环 动力特性 动三轴 

分 类 号：TU416.1[建筑科学—岩土工程]