热损伤北山花岗岩力学特性试验研究

来源 :城市地下空间与地质灾害防治技术论坛暨第八届江苏省岩土力学与工程学术会议 | 被引量 : 0次 | 上传用户：ljxue1224

【摘要】

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【作者】

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王永超李二兵谭跃虎段建立濮仕坤王健

【机构】

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解放军理工大学国防工程学院,江苏南京210007

【出处】

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城市地下空间与地质灾害防治技术论坛暨第八届江苏省岩土力学与工程学术会议

【发表日期】

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2017年3期

【关键词】

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地下岩体热损伤力学特性高放废物处置库

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为了研究热损伤北山花岗岩力学特性,对取自甘肃北山坑探设施钻爆施工后的花岗岩围岩试样开展了高温作用后的三轴压缩试验和实时高温状态下的单轴压缩试验,分析了各个试验条件下的典型应力-应变曲线和声发射特征,对比研究了其强度参数和变形参数损伤劣化规律.研究结果表明:高温作用后的三轴压缩试验中相同围压条件下,北山花岗岩抗压强度、弹性模量随着作用温度的升高呈现出先增加后减小的趋势,说明经过适当的高温作用有利于提高北山花岗岩的抗压强度、弹性模量.实时高温状态下的单轴压缩试验中,随着温度的升高,抗压强度、弹性模量呈下降趋势.相同温度条件下,实时高温状态下北山花岗岩单轴抗压强度、弹性模量均小于高温作用后的单轴抗压强度、弹性模量.

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热损伤北山花岗岩力学特性试验研究

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