锦屏一级水电站右岸进水口引渠边坡动态设计研究

游湘; 杨涛; 张旻; 杨鹏飞

doi:10.3969/j.issn.1001-5485.2014.11.0302014,31(11):155-159,171

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长江科学院院报 ›› 2014, Vol. 31 ›› Issue (11) : 155-159. DOI: 10.3969/j.issn.1001-5485.2014.11.0302014,31(11):155-159,171

工程设计与施工监控

锦屏一级水电站右岸进水口引渠边坡动态设计研究

游湘¹,杨涛²,张旻¹,杨鹏飞²

作者信息 +

Dynamic Design of the Intake Slope on the Right Bank of Jinping-I Hydropower Station

YOU Xiang¹,YANG Tao²,ZHANG Min¹,YANG Peng-fei²

Author information +

文章历史 +

摘要

锦屏一级水电站右岸进水口引渠边坡高陡,设计阶段无法准确确定其工程地质条件,因此需要在施工期根据新揭露的地质情况,进行动态稳定性设计。施工初期开挖揭示边坡体主要以底滑面g_yj3为控制性结构面,论文讨论了底滑面参数的确定方法以及相应的块体稳定性。坡体开挖至1860m高程,揭露出控制性底滑面g_8sz-1,论文讨论了其产状确定过程,为避免底滑面g_8sz-1在开挖面直接出露,重新设计优化了1827m平台体型;建立三维数值计算模型,分析优化体型后的块体变形特征,采用底滑面点安全系数法分析支护布置方案。施工完建后通过对边坡体监测资料的反馈分析,论证了支护后块体的稳定性。研究可为水电工程高陡边坡的动态施工设计提供借鉴。

Abstract

The slope of approach channel for the inlet of Jinping-I Hydropower Station on the right bank is steep and complex. The engineering geological conditions cannot be confirmed accurately before the slope is excavated. Dynamic design of the slope is necessary according to the new geological conditions revealed during the slope excavation. During the initial excavation, the bottom sliding surface g_yj3 is revealed as controlling structural surface of the slope. The method of determining its parameters and the stability calculation of the block are discussed in this paper. When the slope is excavated to 1 860 m, the controlling structural surface g_8sz-1 is revealed. The method of determining its attitude is discussed. In order to avoid the surface g_8sz-1being exposed in construction, the size of the platform at 1827m is redesigned. Moreover, three-dimensional numerical model is established to analyze the deformation characteristics of the block after the platform is optimized to determine the scope of controlling block. The safety factor of the bottom sliding surface point is used to study the slide mechanism of block and the support layout scheme. Finally, the stability of the supported block is evaluated by inversion analysis of the slope body’s monitoring data. This research provides reference for the dynamic construction design of steep slope in hydropower projects.

导出引用

游湘,杨涛,张旻,杨鹏飞. 锦屏一级水电站右岸进水口引渠边坡动态设计研究[J]. 长江科学院院报. 2014, 31(11): 155-159 https://doi.org/10.3969/j.issn.1001-5485.2014.11.0302014,31(11):155-159,171

YOU Xiang,YANG Tao,ZHANG Min,YANG Peng-fei. Dynamic Design of the Intake Slope on the Right Bank of Jinping-I Hydropower Station[J]. Journal of Changjiang River Scientific Research Institute. 2014, 31(11): 155-159 https://doi.org/10.3969/j.issn.1001-5485.2014.11.0302014,31(11):155-159,171

中图分类号： O319.56

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