汶川地震对冶勒大坝影响分析
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摘要
冶勒大坝为沥青混凝土心墙堆石坝,最大坝高124.5m,坝址地震烈度高、地质条件复杂。该坝址距离"5.12"汶川大地震震中258km,地震发生时坝区有强烈震感。坝上布置了由9台强震仪组成的强震监测台阵及埋设有较完整的大坝安全监测仪器,在此次汶川地震中获得了较完整的地震记录和其他监测资料。通过对强震监测资料及地震前后大坝变形、应力、应变及渗流渗压等方面的分析,考察汶川大地震对冶勒大坝工作性态产生的影响。分析结果表明,地震对大坝整体的应力、应变、渗流渗压并未造成明显的不利影响,但对大坝局部结构产生了一些不利的影响。总体而言,整个大坝在遭遇Ms8.0级大地震之后,外观无异常现象,总体运行性态基本稳定。
Yele Dam is a rockfill dam with an asphaltic concrete core wall.The maximum dam height is 124.5 m;and the geological conditions of the foundation are quite complex with a high degree of seismic intensity.The dam area was shocked strongly at an epicentral distance of about 258 km.There are 9 accelerographs and some other monitoring instruments on the dam.And they obtained comparatively complete records of the earthquake and other monitoring data during Wenchuan Earthquake.The effects of Wenchuan Earthquake on Yele Dam were studied based on the earthquake records and the analysis of the deformation,stress and strain,as well as seepage and osmotic pressure.Based on these analysis there had no significant adverse effects on the dam,but it still had some disadvantage effects on the partial structure of the dam.It was concluded that there was no exceptional appearance and the dam remained in normal working state after the Ms8.0 earthquake.
Yele Dam is a rockfill dam with an asphaltic concrete core wall.The maximum dam height is 124.5 m;and the geological conditions of the foundation are quite complex with a high degree of seismic intensity.The dam area was shocked strongly at an epicentral distance of about 258 km.There are 9 accelerographs and some other monitoring instruments on the dam.And they obtained comparatively complete records of the earthquake and other monitoring data during Wenchuan Earthquake.The effects of Wenchuan Earthquake on Yele Dam were studied based on the earthquake records and the analysis of the deformation,stress and strain,as well as seepage and osmotic pressure.Based on these analysis there had no significant adverse effects on the dam,but it still had some disadvantage effects on the partial structure of the dam.It was concluded that there was no exceptional appearance and the dam remained in normal working state after the Ms8.0 earthquake.
引文
[1]何顺宾,胡永胜,刘吉祥.冶勒水电站沥青混凝土心墙堆石坝[J].水电站设计,2006,22(2):46-53.HE Shun-bin,HU Yong-sheng,LIU Ji-xiang.Yele hydropower station asphalt concrete core rockfill dam[J].Design of Hydroelectric Power Station,2006,22(2):46-53.
[2]陈绪高.冶勒水电站沥青混凝土心墙堆石坝监测设计[J].四川水力发电,2003,22(4):50-53.CHEN Xu-gao.The monitoring design of Yele hydropower station asphalt concrete core rockfill dam[J].Sichuan Water Power,2003,22(4):50-53.
[3]李庆华.冶勒水电站沥青混凝土心墙堆石坝原型观测设计[J].四川水力发电,2004,23(1):99-102.LI Qing-hua.The prototype monitoring design of Yele hydropower station asphalt concrete core rockfill dam[J].Sichuan Water Power,2004,23(1):99-102.
[4]陈生水,霍家平,章为民.“5.12”汶川地震对紫坪铺混凝土面板坝的影响及原因分析[J].岩土工程学报,2008,30(6):795-801.CHEN Sheng-shui,HUO Jia-ping,ZHANG Wei-min.Analysis of effects of“5.12”wenchuan earthquake on Zipingpu concrete face rockfill dam[J].Chinese Journal of Geotechnical Engineering,2008,30(6):795-801.
[5]周朝晖.2008年四川汶川8.0级地震强震动台网观测记录[J].四川地震,2008,4(4):25-29.ZHOU Zhao-hui.The strong ground motion recordings of the Ms8.O Wenchuan earthquake in Sichuan province[J].Earthquake Research In Sichuan,2008,4(4):25-29.
[6]DARBRE G R.Strong-motion instrumentation of dams[J].Earthquake Engineering and Structure Dynamics,1995,24:1101-1111.
[7]熊堃,何蕴龙,张艳锋.“5·12”汶川大地震时冶勒大坝实测动力反应[J].岩土工程学报,2008,30(10):1575-1580.XIONG Kun,HE Yun-long,ZHANG Yan-feng.Recorded seismic response of Yele Dam in5.12Wenchuan earthquake[J].Chinese Journal of Geotechnical Engineering,2008,30(10):1575-1580.
[2]陈绪高.冶勒水电站沥青混凝土心墙堆石坝监测设计[J].四川水力发电,2003,22(4):50-53.CHEN Xu-gao.The monitoring design of Yele hydropower station asphalt concrete core rockfill dam[J].Sichuan Water Power,2003,22(4):50-53.
[3]李庆华.冶勒水电站沥青混凝土心墙堆石坝原型观测设计[J].四川水力发电,2004,23(1):99-102.LI Qing-hua.The prototype monitoring design of Yele hydropower station asphalt concrete core rockfill dam[J].Sichuan Water Power,2004,23(1):99-102.
[4]陈生水,霍家平,章为民.“5.12”汶川地震对紫坪铺混凝土面板坝的影响及原因分析[J].岩土工程学报,2008,30(6):795-801.CHEN Sheng-shui,HUO Jia-ping,ZHANG Wei-min.Analysis of effects of“5.12”wenchuan earthquake on Zipingpu concrete face rockfill dam[J].Chinese Journal of Geotechnical Engineering,2008,30(6):795-801.
[5]周朝晖.2008年四川汶川8.0级地震强震动台网观测记录[J].四川地震,2008,4(4):25-29.ZHOU Zhao-hui.The strong ground motion recordings of the Ms8.O Wenchuan earthquake in Sichuan province[J].Earthquake Research In Sichuan,2008,4(4):25-29.
[6]DARBRE G R.Strong-motion instrumentation of dams[J].Earthquake Engineering and Structure Dynamics,1995,24:1101-1111.
[7]熊堃,何蕴龙,张艳锋.“5·12”汶川大地震时冶勒大坝实测动力反应[J].岩土工程学报,2008,30(10):1575-1580.XIONG Kun,HE Yun-long,ZHANG Yan-feng.Recorded seismic response of Yele Dam in5.12Wenchuan earthquake[J].Chinese Journal of Geotechnical Engineering,2008,30(10):1575-1580.
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