高中间主应力下地下厂房高边墙围岩补强支护及效果评价

发布时间：2018-07-02 07:59

本文选题：高中间主应力 + 猴子岩地下厂房　；参考：《水电能源科学》2016年03期

【摘要】：地应力高、岩石强度应力比低和中间主应力偏高是猴子岩水电站地下厂房的主要地质环境特征,且施工期高边墙围岩稳定性问题普遍、突出。结合开挖揭示的高地应力、围岩坚硬较完整和局部节理裂隙较发育等工程地质环境条件,在总结施工期围岩变形破坏特征和分析监测资料的基础上,研究了高中间主应力条件下地下厂房高边墙围岩补强支护措施,并对其效果进行评价。结果表明,补强支护处的边墙围岩变形速率减小,位移得到了收敛,说明支护合理、有效,为类似工程的围岩补强支护和安全控制提供了借鉴。
[Abstract]:High ground stress, low rock strength stress ratio and high intermediate principal stress are the main geological environment characteristics of underground powerhouse of Monkey Rock Hydropower Station, and the stability of surrounding rock of high side wall during construction period is common and prominent. Combined with the engineering geological environment conditions such as high ground stress revealed by excavation, the hard and complete surrounding rock and the development of local joints and cracks, the deformation and failure characteristics of surrounding rock during the construction period were summarized and the monitoring data were analyzed. The reinforcement and support measures of surrounding rock of high side wall of underground powerhouse under the condition of high intermediate principal stress are studied and its effect is evaluated. The results show that the deformation rate of side wall rock is reduced and the displacement is convergent, which shows that the support is reasonable and effective, which provides a reference for the surrounding rock reinforcement support and safety control of similar projects.
【作者单位】：中国地质大学工程学院;中国电建集团成都勘测设计研究院有限公司;
【基金】：中国电建集团公司科研项目(P099) 国家自然科学基金项目(41472263)
【分类号】：TV223

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