| 彭成,李鑫,涂福豪,郭庆梅,樊军伟.水—热环境对泥岩的力学特性影响试验研究[J].南华大学学报(自然科学版),2021,(4):49~55.[PENG Cheng,LI Xin,TU Fuhao,GUO Qingmei,FAN Junwei.Experimental Study on the Influence of Hydro-thermal Environment on the Mechanical Properties of Mudstone[J].Journal of University of South China(Science and Technology),2021,(4):49~55.] |
| 水—热环境对泥岩的力学特性影响试验研究 |
| Experimental Study on the Influence of Hydro-thermal Environment on the Mechanical Properties of Mudstone |
| 投稿时间：2021-01-11 |
| DOI： |
| 中文关键词: 泥岩 含水率 力学特性 低温 单轴试验〖PS21-03彭成OSID码.tif Y4*4,Y#〗 |
| 英文关键词:mudstone moisture content mechanics characteristic low temperature uniaxial compression experiment |
| 基金项目:水利部土石坝破坏机理与防控技术重点实验室开放基金项目(YK319008);湖南省教育厅一般项目(20C1608) |
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| 中文摘要: |
| 为探究低温与含水条件对泥岩力学性质的影响,研究了泥岩在不同含水条件与不同低温环境下单轴抗压强度的变化规律,对饱和、天然、干燥三种含水状态下的泥岩在－50 ℃~10 ℃环境中养护的样本进行单轴压缩试验,测定其单轴抗压强度并探究了其弹性模量的变化趋势。结果表明:泥岩的单轴抗压强度与含水率ω呈指数函数递减关系,随含水率上升泥岩弹性模量减小,弹性模量的变化速率随含水率的上升而增大;温度降低时泥岩的单轴抗压强度呈指数增长,弹性模量随温度降低而增加,干燥时呈线性关系,天然与饱和状态时变化速率随温度的降低而增大。孔隙水会使泥岩矿物间水胶连接减弱,而负温会使其增强,含水岩样更易发生剪性破坏,干燥岩样则多为张性破坏。 |
| 英文摘要: |
| In order to research the influence of low temperature and water bearing conditions on the mechanical properties of mudstone, and the variation of uniaxial compressive strength of mudstone under different water bearing conditions and different low temperature environment. Uniaxial compression test was carried out on the samples of mudstone cured at －50 ℃~10 ℃ under saturated, natural and dry water bearing conditions, to determine the uniaxial compressive strength and change trend of elastic modulus. Based on these test results, the uniaxial compressive strength of mudstone decreases exponentially with water content in. The elastic modulus of mudstone decreases with the increase of water content, and the change rate of elastic modulus increases with the increase of water content. The uniaxial compressive strength of mudstone increased exponentially at lower temperature. The elastic modulus increases with the decrease of temperature, linear change rate in dry state, and the change rate increases with the decrease of temperature in natural and saturated state. Pore water can weaken the water-cement connection between mudstone minerals, and negative temperature can strengthen it, water sample are more likely to occur shear destruction, dry sample for more tensile damage. Water-bearing rock samples are more prone to shear damage, while dry rock are more prone to tensile damage. |
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