高地应力环境下坚硬岩体河床坝基开挖的变形破坏机理研究

吴琦 夏雄彬 吴艺楠

吴琦, 夏雄彬, 吴艺楠. 2013: 高地应力环境下坚硬岩体河床坝基开挖的变形破坏机理研究. 工程地质学报, 21(5): 681-687.
引用本文: 吴琦, 夏雄彬, 吴艺楠. 2013: 高地应力环境下坚硬岩体河床坝基开挖的变形破坏机理研究. 工程地质学报, 21(5): 681-687.
WU Qi, XIA Xiongbin, WU Yinan. 2013: DEFORMATION AND DAMAGE OF HARD ROCK MASS RIVER BED DUE TO DAM FOUNDATION EXCAVATION UNDER HIGH IN-SITU STRESS. JOURNAL OF ENGINEERING GEOLOGY, 21(5): 681-687.
Citation: WU Qi, XIA Xiongbin, WU Yinan. 2013: DEFORMATION AND DAMAGE OF HARD ROCK MASS RIVER BED DUE TO DAM FOUNDATION EXCAVATION UNDER HIGH IN-SITU STRESS. JOURNAL OF ENGINEERING GEOLOGY, 21(5): 681-687.

高地应力环境下坚硬岩体河床坝基开挖的变形破坏机理研究

基金项目: 

水利部公益性行业科研专项(201301034)资助

详细信息
    作者简介:

    吴琦,从事地质工程方面研究.Email: 495426367@qq.com

  • 中图分类号: TU4

DEFORMATION AND DAMAGE OF HARD ROCK MASS RIVER BED DUE TO DAM FOUNDATION EXCAVATION UNDER HIGH IN-SITU STRESS

  • 摘要: 小湾水电站坝基岩体在开挖过程中,暴露出一系列的变形破坏现象,主要表现为板裂、表面岩爆、沿已有裂隙张开、扩展和错动等。在对上述变形现象分析的基础上,研究了高应力环境下坝基岩体开挖的地质力学响应,发现:河床坝基岩体在开挖过程中所表现出的变形主要集中在坝基浅表,且具有时效性。根据变形破坏现象分析和变形响应研究,对高地应力环境下坚硬岩体河床坝基开挖的变形破坏机理有了新的认识,是河谷下切和开挖卸荷过程中的应力重分布造成的浅表生改造的结果。最终,将河床坝基岩体的变形破坏归纳为压致拉裂卸荷回弹模式,且以压致拉裂为主。
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出版历程
  • 收稿日期:  2013-02-25
  • 修回日期:  2013-08-26
  • 刊出日期:  2013-10-25

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