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酸碱环境干湿循环作用下砂岩抗剪强度劣化规律研究

刘新荣, 袁文, 傅晏, 王子娟, 朱乐文, 谢应坤

刘新荣, 袁文, 傅晏, 王子娟, 朱乐文, 谢应坤. 酸碱环境干湿循环作用下砂岩抗剪强度劣化规律研究[J]. 岩土工程学报, 2017, 39(12): 2320-2326. DOI: 10.11779/CJGE201712022
引用本文: 刘新荣, 袁文, 傅晏, 王子娟, 朱乐文, 谢应坤. 酸碱环境干湿循环作用下砂岩抗剪强度劣化规律研究[J]. 岩土工程学报, 2017, 39(12): 2320-2326. DOI: 10.11779/CJGE201712022
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LIU Xin-rong, YUAN Wen, FU Yan, WANG Zi-juan, ZHU Le-wen, XIE Ying-kun. Deterioration rules of shear strength in sandstones under wetting and drying cycles in acid and alkali environment[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(12): 2320-2326. DOI: 10.11779/CJGE201712022
Citation: LIU Xin-rong, YUAN Wen, FU Yan, WANG Zi-juan, ZHU Le-wen, XIE Ying-kun. Deterioration rules of shear strength in sandstones under wetting and drying cycles in acid and alkali environment[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(12): 2320-2326. DOI: 10.11779/CJGE201712022
shu

酸碱环境干湿循环作用下砂岩抗剪强度劣化规律研究  English Version

  • 1. 重庆大学土木工程学院,重庆 400045;
    2. 重庆大学建设管理与房地产学院,重庆 400045;
    3. 浙江瑞安安阳中心城区管委会,浙江 瑞安 325200;
    4. 重庆市高新工程勘察设计院有限公司,重庆 401121

基金项目: 国家自然科学青年基金项目（51308567）
详细信息
    作者简介:

    刘新荣(1969- ),男,教授,博士生导师,主要从事岩土工程等方面的教学和科研。E-mail: liuxrong@126.com。

  • 中图分类号: TU43

Deterioration rules of shear strength in sandstones under wetting and drying cycles in acid and alkali environment

  • 1. College of Civil Engineering, Chongqing University, Chongqing 400045, China;
    2. Faculty of Construction Management and Real Estate, Chongqing University, Chongqing 400045, China;
    3. Anyang Center Administration Committee, Ruian 325200, China;
    4. Chongqing Gaoxin Engineering Survey and Design Institute Ltd., Co., Chongqing 401121, China

摘要

    摘要
  • 摘要: 为研究酸碱环境中砂岩在干湿循环作用下抗剪强度的劣化规律,在浸泡溶液pH值分别为7,9,4的环境中,对砂岩试件进行次数为1,3,6,10次的干湿循环试验。通过不同循环次数后的单轴和三轴试验,计算得到每个阶段循环后砂岩的黏聚力和内摩擦角及其与干湿循环次数N的变化关系式,从而获得砂岩在不同pH值干湿循环作用下抗剪强度随循环次数的变化公式。结果表明,砂岩的抗剪强度随着循环次数的增加而降低,在干湿循环作用前期,受影响较为显著,抗剪强度降幅很大,而后,强度降幅相对较小;酸性环境下,砂岩抗剪强度劣化最为严重,碱性次之,中性最轻;干湿循环后的干燥试件抗剪强度劣化幅度远不如湿状态下的劣化幅度。
    Abstract: In order to study the deterioration rules of shear strength in sandstones under wetting and drying cycles, sandstone specimens are tested after 1, 3, 6, 10 wetting and drying cycles in the environment of pH=7, 9, 4. Through UCS and TCS after different cycles, the cohesion and internal friction angle of sandstone are calculated, and the relation formulae between them and number of cycles N are determined, respectively, thus the shear strength is obtained under wetting and drying cycles in acid and alkali environment. The results show that the shear strength of sandstone decreases with the increase of cycles. In the early stage of cycles, the deterioration effect is comparatively significant, and the deterioration of shear strength is very large, then, the strength deterioration is relatively small. In the acidic environment, the deterioration of shear strength in sandstones is the most serious, slightly reduced in the alkaline environment, and the neutral condition is the lightest. The deterioration of shear strength in dried samples is much lower than that of wet samples.
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    • 参考文献(13)
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出版历程
  • 收稿日期:  2016-05-22
  • 发布日期:  2017-12-24

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