西南某电站库区堆积体稳定性分析及涌浪预测
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摘要
库区堆积体边坡具有体积大、落差大和坡度陡的特点,对枢纽工程具有潜在威胁。以西南某电站库区堆积体为例,基于GEO-SLOPE分析软件对其稳定性进行计算与评价,滑速计算采用能量法和潘家铮法,涌浪高度计算采用潘家铮法和水科院经验公式法。结果表明:堆积体在蓄水工况下可能产生局部失稳,在下游19km集镇处产生的涌浪高度为0.63m,但总体上形成的涌浪对下游沿岸集镇及大坝影响甚微。
Accumulation slope has the characteristics of large volume,big fall,and steep slope,which can induce potential threats to the key water projects.In this paper,the stability of an accumulation slope of a hydropower station in southwest China was calculated and evaluated using GEO-SLPOE software.The method of energy and Pan Jiazheng method were adopted to calculate sliding speed,and the surge height was determined by empirical formula method of IWHR and Pan Jiazheng method.The results showed that local instability can occur in the accumulation under storage conditions and the surge height is 0.63 mat a town of19 km downstream.However,the surge has little impacts on the downstream towns and the dam.
Accumulation slope has the characteristics of large volume,big fall,and steep slope,which can induce potential threats to the key water projects.In this paper,the stability of an accumulation slope of a hydropower station in southwest China was calculated and evaluated using GEO-SLPOE software.The method of energy and Pan Jiazheng method were adopted to calculate sliding speed,and the surge height was determined by empirical formula method of IWHR and Pan Jiazheng method.The results showed that local instability can occur in the accumulation under storage conditions and the surge height is 0.63 mat a town of19 km downstream.However,the surge has little impacts on the downstream towns and the dam.
引文
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[10]Valentin Heller.Landslide Generated Impulse Waves[A].Prediction of Near Field Characteristics.ETH Zurich[C],2007.
[11]包袆,唐兴君.某水电站库区滑坡滑速涌浪计算[J].地质灾害与环境保护,2011,22(1):36-40.(BAO Yi,TANG Xing-jun.Calculating sliding speed and surge height of unstable slopes in a reservoir[J].Journal of Geological Hazards and Environment Preservation,2011,22(1):36-40.(in Chinese))
[2]Noda Edward.Water waves generated by landsides[J].Journal of the Waterways,1970,96(4):835-855..
[3]潘家铮.建筑物的抗滑稳定和滑坡分析[M].北京:水利出版社,1980:133-154.(PAN Jia-zheng.Stability of construction against sliding and landslide analysis[M].Beijing:Water Conservancy Press,1980:133-154.(in Chinese))
[4]J W KamPhis,R J Bowering.Impulse waves generated by landslides[A].ASCE,Proceedings of the 12th Coastal Engineering Conference[C],1971:689-699.
[5]黄种为,董兴林.水库库岸滑坡激起涌浪的试验研究[A].水利水电科学研究院科学研究论文集第13集(水力学)[C].北京:水利出版社,1983:157-170.(HUANG Zhong-wei,DONG Xing-lin.Research on tests of landslide-triggered waves in reservoir[M].Proceeding of scientific research of China institute water resources and hydropower research,13Volume Set(Hydraulics).Beijing:Water Conservancy Press,1983:157-170.(in Chinese))
[6]哈秋舲,胡维德.水库滑坡涌浪计算[J].人民黄河,1980,2(2):30-36.(HA Qiu-ling,HU Wei-de.Calculation of landslide surge waves in reservoir[J].Yellow River,1980,2(2):30-36.(in Chinese))
[7]汪洋,殷坤龙.水库库岸滑坡涌浪的传播与爬高研究[J].岩土力学,2008,29(4):1031-1035.(WANG Yang,YIN Kun-long.Research on propagation and climb height of surge triggered by landslide in reservoir[J].Rock and Soil Mechanics,2008,29(4):1031-1035.(in Chinese))
[8]汪洋,殷坤龙.水库库岸滑坡的运动过程分析及初始涌浪计算[J].地球科学-中国地质大学学报,2003,28(5):579-582.(WANG Yang,YIN Kun-long.Analysis of movement process of landslide in reservoir and calculation of its initial surge height[J].Earth Science-Journal of China University of Geosciences,2003,28(5):579-582.(in Chinese))
[9]任兴伟,唐益群,代云霞,等.滑坡初始涌浪高度计算方法的改进及其应用[J].水利学报,2009,40(9):1116-1120.(REN Xing-wei,TANG Yi-qun,DAI Yun-xia,et al.Improved method for calculating landslide initial surge height[J].Journal of Hydraulic Engineering,2009,40(9):1116-1120.(in Chinese))
[10]Valentin Heller.Landslide Generated Impulse Waves[A].Prediction of Near Field Characteristics.ETH Zurich[C],2007.
[11]包袆,唐兴君.某水电站库区滑坡滑速涌浪计算[J].地质灾害与环境保护,2011,22(1):36-40.(BAO Yi,TANG Xing-jun.Calculating sliding speed and surge height of unstable slopes in a reservoir[J].Journal of Geological Hazards and Environment Preservation,2011,22(1):36-40.(in Chinese))