高岩温隧道喷射混凝土与花岗岩围岩平坦状界面剪切强度敏感性分析
首发时间:2016-03-18
摘要:为获取高岩温隧道喷射混凝土与围岩平坦状界面剪切强度与相关因素的敏感程度,开展了混凝土-花岗岩复合试件的剪切试验,通过计算温度、相对湿度、法向应力和混凝土强度的敏感度,评价了峰值剪切强度和残余剪切强度对于各因素的敏感性。结果表明:峰值抗剪强度最敏感因素是温度,其次是法向应力和相对湿度,最后是混凝土强度;残余剪切强度最敏感因素是法向应力,对于温度、相对湿度、混凝土强度的敏感性均较低;高岩温对于峰值剪切强度影响很大,而对于残余剪切强度则影响很小,与常岩温一致。
关键词: 隧道 高岩温 喷射混凝土 平坦状界面 剪切强度 敏感性
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Sensitivity analysis for shear strength of flat interface between shotcrete and granite in high temperature tunnel
Abstract:For the sensitivity about the shear strength of flat interface between shotcrete and granite in high temperature tunnel, shear te experiments were done about concret-granite combined specimens. By calculating the sensitivities of temperature, relative humidity, nomal stress, concrete strength , the sensitivities for peak shear strength and residual shear strength were evaluated. The results show that the most sensitive factor is temperature for peak shear strength, the more sensitive factors are relative humidity and normal stress, and weak correlation with concrete strength. The most sensitive factor is normal stress for residual shear strength, and all of temperature, relative humidity and concrete strength are weakly relative to it. High rock temperature has great influence on the peak shear strength, however ,little effect on the residual shear strength which is same to normal temperature.
Keywords: tunnel high rock temperature shotcrete flat interface shear strength sensitivity
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No.4680649113829214****
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高岩温隧道喷射混凝土与花岗岩围岩平坦状界面剪切强度敏感性分析
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