董箐水电站溢洪道泄槽段边坡三维有限元分析
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摘要
以董箐水电站为例,采用三维有限元法分析了溢洪道泄槽段边坡施工期和运行期各种工况下的变形稳定性。为确保边坡安全,在加强监测工作的情况下采用预应力锚索和系统锚杆同时加固方案。结果表明,泄槽段进口处两侧边坡台阶处均存在拉剪屈服危险,暴雨和地震是影响边坡稳定的最重要因素,当考虑地震和暴雨联合作用时边坡将处于较危险状态,采取的防范措施切实可行。
Taking the Dongqing Hydropower Station for an example,three-dimensional finite element method is applied to analyze the deformation and stability of slope of chute section of spillway in different conditions during the construction period and the operation period.For ensuring slope safety,reinforcement plan of prestressed cables and system anchors should be adopted under strengthening the monitoring.The results show that the risk of tension and shear yield may occur in both sides of steps of entrance of chute section;storm and earthquake are the most important factors for influence of slope stability;when considering both of storm and earthquake,the slope will be more dangerous;the preventive measure taken is practicable.
Taking the Dongqing Hydropower Station for an example,three-dimensional finite element method is applied to analyze the deformation and stability of slope of chute section of spillway in different conditions during the construction period and the operation period.For ensuring slope safety,reinforcement plan of prestressed cables and system anchors should be adopted under strengthening the monitoring.The results show that the risk of tension and shear yield may occur in both sides of steps of entrance of chute section;storm and earthquake are the most important factors for influence of slope stability;when considering both of storm and earthquake,the slope will be more dangerous;the preventive measure taken is practicable.
引文
[1]李晓彬,李水生,任兴普,等.董箐水电站溢洪道设计[J].贵州水力发电,2009,23(5):29-31,43.
[2]黄润秋,李为乐.“5.12”汶川大地震触发地质灾害的发育分布规律研究[J].岩石力学与工程学报,2008,27(12):2 585-2 592.
[3]张卓,练继建,杨晓慧,等.岩质边坡在降雨条件下的稳定性分析[J].哈尔滨工业大学学报,2009,41(10):202-205.
[4]云南省地震工程研究院.北盘江董箐水电站工程场地地震安全性评价及区域构造稳定性评价报告[R].昆明:云南省地震工程研究院,2008.
[5]陈星,王乐华,王瑞红.三种大型软件在边坡开挖中的应用分析[J].水电能源科学,2009,27(6):155-157.
[6]中国水电顾问集团西北勘测设计研究院,中国水电顾问集团贵阳勘测设计研究院.水电水利工程边坡设计规范(DL/T5353-2006)[S].北京:中国电力出版社,2006.
[2]黄润秋,李为乐.“5.12”汶川大地震触发地质灾害的发育分布规律研究[J].岩石力学与工程学报,2008,27(12):2 585-2 592.
[3]张卓,练继建,杨晓慧,等.岩质边坡在降雨条件下的稳定性分析[J].哈尔滨工业大学学报,2009,41(10):202-205.
[4]云南省地震工程研究院.北盘江董箐水电站工程场地地震安全性评价及区域构造稳定性评价报告[R].昆明:云南省地震工程研究院,2008.
[5]陈星,王乐华,王瑞红.三种大型软件在边坡开挖中的应用分析[J].水电能源科学,2009,27(6):155-157.
[6]中国水电顾问集团西北勘测设计研究院,中国水电顾问集团贵阳勘测设计研究院.水电水利工程边坡设计规范(DL/T5353-2006)[S].北京:中国电力出版社,2006.
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