| 500 m级超高边坡时效变形特征及长期稳定性研究 |
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| 引用本文： | 张公平,周钟,姜清辉,位韦. 500 m级超高边坡时效变形特征及长期稳定性研究[J]. 地下空间与工程学报, 2017, 0(6): 1688-1694 |
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| 作者姓名： | 张公平 周钟 姜清辉 位韦 |
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| 摘 要： | 水电站坝前工程边坡的变形稳定问题是近年来水电工程界关注的热点话题。相关监测成果表明,自开挖期完成,工程边坡将先后经历开挖卸荷变形期、蓄水边坡变形调整期和长期变形收敛期3个阶段。本文以西部地区某巨型水电工程左岸500 m级超高坝前工程边坡为例,从边坡基本工程地质条件和边坡变形监测资料入手,在对各阶段边坡变形影响因素深入分析的基础上,通过工程岩体流变试验确定了边坡岩体的流变力学模型,采用人工神经网络监测反馈分析方法开展了边坡岩体流变变形的监测反馈分析,获得了边坡岩体的流变参数,并以此为基础开展了边坡长期变形趋势的预测研究,成果可为边坡长期稳定性安全评价提供依据。
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Study on Time-dependent Deformation Behavior and Long-term Stability of a 500 m-level Super High Slope |
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| Abstract: | Slope deformation stability of upstream engineering slope has been one of the hottest topics in hydropower engineering.Relevant monitoring results show that,from the end of the excavation period,the engineering slope will go through excavation unloading deformation period,impounding deformation adjusting period,and long-term deformation convergent period.In this paper,the left bank 500 m-height upstream engineering slope of a huge hydropower project in western part of China was set to be a project case.This paper began with analysis of the basic geological condition and the basic monitoring data,deeply researched the influence factors of the slope deformation in different period,confirmed the rock mass rheological mechanical model by rheological test of engineering slope rock mass,performed monitoring feedback analysis of the rock mass rheological deformation with artificial neural network monitoring and feedback analysis method,obtained the rheological parameter of slope rock mass.On this basis,this paper carried out the prediction research of long-term deformation tendency of the engineering slope,which can be used as the basis of long-term safety evaluation of the engineering slope. |
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