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首页> 外文期刊>Advances in civil engineering >Creep Investigation on Shale-Like Material with Preexisting Fissure under Coupling Temperatures and Confining Pressures
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Creep Investigation on Shale-Like Material with Preexisting Fissure under Coupling Temperatures and Confining Pressures

机译：耦合温度下具有预先存在的裂缝的页岩状物质的蠕变调查，包括耦合温度和限制压力

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In order to investigate the influence of temperature, confining pressure, and preexisting fissure on creep characteristics of rock mass, multistage creep experiments were performed on shale-like material, with preexisting fissure under different temperatures and confining pressures. The results showed that new microcracks generated and propagated with the increase of temperature in both uniaxial and triaxial creep experiments, and the generation and propagation were most pronounced at 60°C and least at 20～50°C in uniaxial creep experiments. The generation and propagation were restricted by confining pressure. Temperature had less influence on the creep strain rate in triaxial creep experiment, whereas it had a significant influence on the steady-state creep rate in uniaxial creep experiment. The influence of confining pressure on the steady-state creep rate was slight when confining pressure was 1?MPa, whereas it was obvious when confining pressure was 3～7?MPa. The closure of preexisting fissure promoted the creep strain rate, and the closure was incomplete when confining pressure was below 3?MPa, whereas it was complete when confining pressure at 5 and 7?MPa.
机译：为了研究温度，限制压力和预先存在的裂缝对岩体蠕变特性的影响，在不同温度和限制压力下，在页岩状材料上进行多级蠕变实验，具有预先存在的裂缝。结果表明，单轴和三轴蠕变实验中的温度的增加产生和传播的新微裂纹，并且在单轴蠕变实验中，在60°C和最少在20〜50℃下发出和繁殖。通过限制压力的产生和传播。温度对三轴蠕变实验中蠕变应变率的影响较小，而它对单轴蠕变实验中稳态蠕变率具有显着影响。限制压力对稳态蠕变率的影响较小时狭窄的压力为1？MPa，而在限制压力为3〜7℃时显而易见。预先存在的裂缝的闭合促进了蠕变应变速率，当限制压力低于3℃时，闭包不完全，而当限制在5和7的压力时，它是完整的。

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