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2008年5月12日,汶川发生里氏8级特大地震,震中基本烈度达Ⅺ度.紫坪铺坝址距震中约17.17km,震中传导至坝址的烈度达Ⅸ～Ⅹ度.就目前国内外同类已建工程而言,如此近距离遭遇强震的高面板坝尚属首次,鉴于工程所处地理位置对下游的影响具有特别重要的意义,工程的安全状态和震害情况备受各方高度关注.本文根据紫坪铺现场震害调查、地震前后大坝观测资料对比分析,论述和评价了震后高面板堆石坝的安全状态、高边坡稳定情况等重大技术问题.
On May 12, 2008, a magnitude 8 Richter scale earthquake struck in Wenchuan with a basic intensity of Ⅺ degree in the epicenter.The dam site in Zipingpu is about 17.17km from the epicenter and the intensity of the epicenter leading to the dam reaches Ⅸ ~ Ⅹ degrees. This is the first time that such a high-panel dam encounters strong earthquakes at a short distance. Therefore, given the special significance of the geographical location of the project to the downstream, the safety status of the project and the earthquake damage situation are greatly affected This article is based on the survey of Zipingpu site seismic damage and comparative analysis of dam observation data before and after the earthquake, and discusses and evaluates the major technical problems such as the safety status of high rockfill dam after the earthquake and the stability of high slope.