| 水岩相互作用对砂岩单轴强度的影响研究 |
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| 引用本文： | 傅晏,刘新荣,张永兴,胡元鑫,谢应坤.水岩相互作用对砂岩单轴强度的影响研究[J].水文地质工程地质,2009,36(6):54-58. |
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| 作者姓名： | 傅晏 刘新荣 张永兴 胡元鑫 谢应坤 |
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| 作者单位： | 重庆大学土木工程学院； |
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| 基金项目： | 国家留学回国人员科研启动基金重点项目，教育部"新世纪优秀人才支持计划"，国家自然科学基金创新群体基金项目 |
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| 摘 要： | 针对重庆地区的微风化砂岩,完成了1、3、6、10、15次的干湿循环,对循环后的试件(饱水状态)进行了单轴抗压和劈裂试验。试验结果表明,干湿循环对砂岩造成了不可逆的渐进性损伤,在15次循环后,单轴抗压强度损失达20.73%,抗拉强度达51.96%,弹性模量达33.79%,三者与循环次数之间有良好的对数关系。在干湿循环过程中,砂岩的强度损伤会出现拐点,这取决于水对砂岩的侵蚀程度。
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| 关 键 词： | 水岩相互作用 干湿循环 单轴抗压强度 抗拉强度 弹性模量 |
Study on the influence of water-rock interaction to the strength of sandstone |
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| FU Yan,LIU Xin-rong,ZHANG Yong-xing,HU Yuan-xin,XIE Ying-kun.Study on the influence of water-rock interaction to the strength of sandstone[J].Hydrogeology and Engineering Geology,2009,36(6):54-58. |
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| Authors: | FU Yan LIU Xin-rong ZHANG Yong-xing HU Yuan-xin XIE Ying-kun |
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| Affiliation: | College of Civil Engineering,Chongqing University,Chongqing 400045,China |
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| Abstract: | Slightly weathered sandstone in Chongqing area was studied to investigate and quantify the effects of cyclic wetting and drying to the rock strength. The UCS, tensile strength and Young' s modulus were measured after subjecting the sandstones to 1, 3, 6, 10, 15 cycles of wetting and drying. The results indicated that the damage of sandstone caused by cycles of wetting and drying is irreversible. UCS, tensile strength and Young' s modulus decrease by 20.73%, 51.96% and 33.79%, respectively, after 15 cycles. There was a marked logarithmic relationship between UCS and cycles, so was tensile strength and Young s modulus. The erosion of sandstone by water caused an inflexion on damage when sandstone was full saturated. |
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| Keywords: | water-rock interaction cyclic wetting and drying UCS tensile strength Young's modulus |
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