大古水电站坝前排沙运行方式与排沙漏斗形态
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摘要
为给实际工程排沙设施的设计和布置提供依据,基于1∶60整体模型,根据淤积泥沙扬动流速相似原理,试验研究大古水电站2条排沙廊道和1个底孔在不同运行方式下坝前库区的排沙效果和排沙漏斗形态。结果表明:排沙洞开启顺序对最终排沙效果影响不大;深水条件下,坝前排沙漏斗形态主要受泥沙特性决定,非黏性沙的排沙漏斗坡度接近于淤积泥沙水下休止角;大古水电站排沙设施的设计方案具备保证电站进水口"门前清"的条件。
Based on the similarity criteria of incipient velocity, an experimental study is performed on a 1∶60 overall physical model to study the sediment flushing effects and sand funnel patterns of two desilting galleries and one bottom tunnel under designed operating conditions to provide a basis for the design and arrangement of the desilting facilities in front of the Dagu Hydropower Station Dam. The results show that the ultimate desilting effect is less affected by the operating order of the desilting tunnels. The patterns of sand funnels are mainly determined by the sediment property, and the slope of the sand funnels is close to the underwater repose angle of non-cohesive sediments under deep reservoir water level. The design scheme for the desilting facilities in Dagu Hydropower Station guarantees the condition of clear in front of the hydropower intake.
Based on the similarity criteria of incipient velocity, an experimental study is performed on a 1∶60 overall physical model to study the sediment flushing effects and sand funnel patterns of two desilting galleries and one bottom tunnel under designed operating conditions to provide a basis for the design and arrangement of the desilting facilities in front of the Dagu Hydropower Station Dam. The results show that the ultimate desilting effect is less affected by the operating order of the desilting tunnels. The patterns of sand funnels are mainly determined by the sediment property, and the slope of the sand funnels is close to the underwater repose angle of non-cohesive sediments under deep reservoir water level. The design scheme for the desilting facilities in Dagu Hydropower Station guarantees the condition of clear in front of the hydropower intake.
引文
[1]洪振国.燕子崖电站防沙和排沙设施的选择[J].泥沙研究,2017,42(5):57-62.(HONG Zhenguo.Choice of sand control and desilting facilities in the Yanziya Power Station[J].Journal of Sediment Research,2017,42(5):57-62.(in Chinese))
[2]郭志学,刘兴年,曹叔尤.水库冲刷漏斗试验研究[J].四川大学学报(工程科学版),2004,36(5):1-5.(GUO Zhixue,LIU Xingnian,CAO Shuyou.Experimental study on reservoir scour funnel of Baoshi Water Power Station[J].Journal of Sichuan University(Engineering Science Edition),2004,36(5):1-5.(in Chinese))
[3]杨涛,黄尔,刘兴年,等.洛古电站坝前冲刷漏斗模型试验研究[J].四川水力发电,2006,25(增刊2):68-71.(YANG Tao,HUANG Er,LIU Xingnian,et al.Experimental study on reservoir scour funnel before dam at Luogu Hydropower Station[J].Sichuan Water Power,2006,25(Sup2):68-71.(in Chinese))
[4]徐国宾,白世录.坝前黏性淤积物局部冲刷漏斗模拟相似性研究[J].水利学报,1997,28(11):29-34.(XUGuobin,BAI Shilu.Study on model similarity of the scour funnel for cohesive sediment downstream dams[J].Journal of Hydraulic Engineering,1997,28(11):29-34.(in Chinese))
[5]王英伟.坝前冲刷漏斗形态的试验研究[J].水利水电工程设计,2001,20(3):42-43.(WANG Yingwei.Study on souring hopper form in front of the dam[J].Design of Water Resources&Hydroelectric Engineering,2001,20(3):42-43.(in Chinese))
[6]崔承章,谢鉴衡.小浪底水库坝区冲刷漏斗形态概化模型研究[J].武汉水利电力大学学报,1995,28(5):547-551.(CUI Chengzhang,XIE Jianheng.Research on a generalized model of the erosion funnel form in the dam area of Xiaolangdi Project[J].Engineering Journal of Wuhan University,1995,28(5):547-551.(in Chinese))
[7]金腊华.水库引排水底孔前冲刷漏斗形态的探讨[J].武汉水利电力学院学报,1991,24(1):93-101.(JINLahua.Study on the configurations of scouring funnels before the bottom sluices for diversion and drainage in reservoirs[J].Engineering Journal of Wuhan University,1991,24(1):93-101.(in Chinese))
[8]熊绍隆.深水孔口前冲刷漏斗形态研究[J].西北水电技术,1983(4):10-21.(XIONG Shaolong.Study on shape of scouring funnel with deep water level[J].Northwest Hydropower,1983(4):10-21.(in Chinese))
[9]应强,马进荣.三峡坝区模型坝前冲刷漏斗形成及成因分析[J].水利水运科学研究,1996(4):343-348.(YING Qiang,MA Jinrong.Formation and cause analysis of scouring funnel in front of dam in model of Three Gorges Project[J].Hydro-Science and Engineering,1996(4):343-348.(in Chinese))
[10]邢晨雄.小浪底浑水动床模型验证及进水塔前冲刷漏斗试验研究[D].郑州:华北水利水电大学,2016.
[11]刘顺东,黄尔.等壳水电站冲刷漏斗模型试验研究[J].东北水利水电,2008(5):63-65,72.(LIU Shundong,HUANG Er.Model test of scouring funnel model at Dengke Hydropower Station[J].Water Resources&Hydropower of Northeast China,2008(5):63-65,72.(in Chinese))
[12]吴时强,王芳芳.澜沧江大古水电站整体水工模型试验研究[R].南京:南京水利科学研究院,2014.
[13]朱晓章.水库泥沙淤积概述[J].四川水力发电,1989(1):20-26.(ZHU Xiaozhang.Overview on reservoir sedimentations[J].Sichuan Water Power,1989(1):20-26.(in Chinese))
[14]苏凤玉,任宏斌.坝前冲刷漏斗形态的试验研究[J].西北水电技术,1986(1):31-45,89.(SU Fengyu,RENHongbin.Experimental research on scouring funnel shape in front of dam[J].Northwest Hydropower,1986(1):31-45,89.(in Chinese))
[15]贠振星,高学平,耿新春,等.阿尔塔什坝前冲刷漏斗模型试验研究[J].水资源与水工程学报,2014,25(1):161-163.(YUN Zhenxing,GAO Xueping,GENGXinchun,et al.Experimental study on the scouring funnel in front of Aertashi Reservoir[J].Journal of Water Resources and Water Engineering,2014,25(1):161-163.(in Chinese))
[2]郭志学,刘兴年,曹叔尤.水库冲刷漏斗试验研究[J].四川大学学报(工程科学版),2004,36(5):1-5.(GUO Zhixue,LIU Xingnian,CAO Shuyou.Experimental study on reservoir scour funnel of Baoshi Water Power Station[J].Journal of Sichuan University(Engineering Science Edition),2004,36(5):1-5.(in Chinese))
[3]杨涛,黄尔,刘兴年,等.洛古电站坝前冲刷漏斗模型试验研究[J].四川水力发电,2006,25(增刊2):68-71.(YANG Tao,HUANG Er,LIU Xingnian,et al.Experimental study on reservoir scour funnel before dam at Luogu Hydropower Station[J].Sichuan Water Power,2006,25(Sup2):68-71.(in Chinese))
[4]徐国宾,白世录.坝前黏性淤积物局部冲刷漏斗模拟相似性研究[J].水利学报,1997,28(11):29-34.(XUGuobin,BAI Shilu.Study on model similarity of the scour funnel for cohesive sediment downstream dams[J].Journal of Hydraulic Engineering,1997,28(11):29-34.(in Chinese))
[5]王英伟.坝前冲刷漏斗形态的试验研究[J].水利水电工程设计,2001,20(3):42-43.(WANG Yingwei.Study on souring hopper form in front of the dam[J].Design of Water Resources&Hydroelectric Engineering,2001,20(3):42-43.(in Chinese))
[6]崔承章,谢鉴衡.小浪底水库坝区冲刷漏斗形态概化模型研究[J].武汉水利电力大学学报,1995,28(5):547-551.(CUI Chengzhang,XIE Jianheng.Research on a generalized model of the erosion funnel form in the dam area of Xiaolangdi Project[J].Engineering Journal of Wuhan University,1995,28(5):547-551.(in Chinese))
[7]金腊华.水库引排水底孔前冲刷漏斗形态的探讨[J].武汉水利电力学院学报,1991,24(1):93-101.(JINLahua.Study on the configurations of scouring funnels before the bottom sluices for diversion and drainage in reservoirs[J].Engineering Journal of Wuhan University,1991,24(1):93-101.(in Chinese))
[8]熊绍隆.深水孔口前冲刷漏斗形态研究[J].西北水电技术,1983(4):10-21.(XIONG Shaolong.Study on shape of scouring funnel with deep water level[J].Northwest Hydropower,1983(4):10-21.(in Chinese))
[9]应强,马进荣.三峡坝区模型坝前冲刷漏斗形成及成因分析[J].水利水运科学研究,1996(4):343-348.(YING Qiang,MA Jinrong.Formation and cause analysis of scouring funnel in front of dam in model of Three Gorges Project[J].Hydro-Science and Engineering,1996(4):343-348.(in Chinese))
[10]邢晨雄.小浪底浑水动床模型验证及进水塔前冲刷漏斗试验研究[D].郑州:华北水利水电大学,2016.
[11]刘顺东,黄尔.等壳水电站冲刷漏斗模型试验研究[J].东北水利水电,2008(5):63-65,72.(LIU Shundong,HUANG Er.Model test of scouring funnel model at Dengke Hydropower Station[J].Water Resources&Hydropower of Northeast China,2008(5):63-65,72.(in Chinese))
[12]吴时强,王芳芳.澜沧江大古水电站整体水工模型试验研究[R].南京:南京水利科学研究院,2014.
[13]朱晓章.水库泥沙淤积概述[J].四川水力发电,1989(1):20-26.(ZHU Xiaozhang.Overview on reservoir sedimentations[J].Sichuan Water Power,1989(1):20-26.(in Chinese))
[14]苏凤玉,任宏斌.坝前冲刷漏斗形态的试验研究[J].西北水电技术,1986(1):31-45,89.(SU Fengyu,RENHongbin.Experimental research on scouring funnel shape in front of dam[J].Northwest Hydropower,1986(1):31-45,89.(in Chinese))
[15]贠振星,高学平,耿新春,等.阿尔塔什坝前冲刷漏斗模型试验研究[J].水资源与水工程学报,2014,25(1):161-163.(YUN Zhenxing,GAO Xueping,GENGXinchun,et al.Experimental study on the scouring funnel in front of Aertashi Reservoir[J].Journal of Water Resources and Water Engineering,2014,25(1):161-163.(in Chinese))