干燥与饱水状态下炭质板岩变形特性分析  

Analysis of Deformation of Carbonaceous Slates Under the Dry and Saturated States

作　　者：宋勇军[1,2] 雷胜友[2] 邹翀[3] 张文新[3] 

机构地区：[1]西安科技大学建筑与土木工程学院,陕西西安710054 [2]长安大学公路学院,陕西西安710064 [3]中铁隧道集团有限公司技术中心,河南洛阳471009

出　　处：《煤炭工程》2015年第4期124-127,共4页Coal Engineering

基　　金：陕西省教育厅科学研究计划(14JK1480)

摘　　要：针对兰渝铁路二期木寨岭隧道炭质板岩富含裂隙水,遇水易软化的工程特性,对干燥和饱水状态下炭质板岩开展常规三轴试验和单轴循环加卸载试验研究。结果表明,水对炭质板岩的变形特性影响显著。相比干燥岩样,饱水试样峰值强度明显降低,而变形量则显著增长。循环加卸载试验的变形曲线表现出明显的记忆性,其外包线几乎与单调连续加载的变形曲线完全重合;同时,加卸载条件下由水引发的塑性变形比加载引发的相应变形值还要大,干燥岩石在每一循环周期下弹性模量值约为饱和状态下的2倍。According to the engineering characteristics that carbonaceous slates of Muzhailing tunnel Lanzhou - Chongqing railway was rich in fracture water, softened into water, tri - axial compression test and uniaxial cyclic loading and unloading test were carried out. The results show that, water brings about significant influence to deformation of carbonaceous slates, compared with the dry rock, peak strength of saturated specimen is observably reduced, however the peak strain is dramatically raised; the results display that sample deformation curves shows distinct memory and good fitting in stress - strain curve between the cyclic loading arid the continuous loading during the tri - axial cyclic loading; meanwhile, the plastic deformation caused by water is more than the corresponding value caused by load under loading and unloading conditions, and the elastic modulus of dry rocks is about 2 times to the saturated condition in each cycle.

关 键 词：炭质板岩 干燥和饱水状态 隧道 变形特性 岩石工程 

分 类 号：TD313[矿业工程—矿井建设]