本文關鍵詞： 片麻狀花崗巖 熱力耦合 蠕變試驗 穩(wěn)態(tài)蠕變率 巖石強度 破壞模式　出處：《水電能源科學》2017年08期 　論文類型：期刊論文

【摘要】：以齊熱哈塔爾水電站引水隧洞高溫段的片麻狀花崗巖為例,通過不同溫度下的室內分級加載三軸蠕變試驗,獲得了熱力耦合作用下巖石穩(wěn)態(tài)蠕變率和強度的變化規(guī)律,揭示了考慮溫度影響的蠕變破壞模式。結果表明,片麻狀花崗巖穩(wěn)態(tài)蠕變率與溫度呈非線性正相關,經(jīng)典軟巖穩(wěn)態(tài)蠕變率模型對片麻狀花崗巖同樣適用;巖石的長期強度與溫度呈負相關,并獲得了硬脆性巖石長期強度隨溫度和圍壓變化的三元素實用公式;隨著溫度升高,巖石破壞模式呈現(xiàn)由單斜面剪切破壞到共軛剪切破壞的轉變,高溫對硬巖具有顯著軟化作用。
[Abstract]:Taking the granitic granitoids in the high temperature section of the diversion tunnel of the Zizehattar Hydropower Station as an example, the steady state creep rate and strength of the rock under thermal coupling are obtained by triaxial creep tests under different temperatures. The creep failure mode considering the influence of temperature is revealed. The results show that the steady creep rate of granitic granites is nonlinear positive correlation with temperature, and the classical model of steady creep rate of soft rock is also suitable for granitic granites. The long-term strength of rock is negatively correlated with temperature, and a practical formula of three elements is obtained for the change of long-term strength of hard brittle rock with temperature and confining pressure, and with the increase of temperature, The failure mode of rock shows the transition from single slope shear failure to conjugate shear failure, and the high temperature has a significant softening effect on hard rock.
【作者單位】： 濰坊學院建筑工程學院;青島理工大學管理學院;山東省建設建工(集團)有限責任公司;
【分類號】：TV223
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本文編號：1518691