【摘要】 分析了汶川大地震紫坪铺面板堆石坝永久变形实测结果。研究表明,大坝顶部区产生的永久沉降最大,而且在永久沉降变形构成中占主要的部分。地震后紫坪铺大坝外形轮廓均在地震前外形轮廓之内,坝坡地震永久变形矢量均指向坝内,表明大坝地震后整体是收缩的,有利于大坝的整体稳定。建议了土石坝地震分区震陷率的概念与方法,论证了坝顶加固的土石坝抗震加固技术的科学性与合理性。更多还原

【Abstract】 The permanent deformation monitoring data of Zipingpu Dam after Wenchuan Earthquake were analyzed herein.The top area of the dam produces a largest permanent settlement which constituting a major part in the total dam permanent deformation.The dam contour after earthquake is within the scope of the previous,and all vectors of slope permanent defor mation point to the inside of the dam body,shows that the dam after the earthquake as a whole is shrinking,and it is conducive to the stability of dam.The regional settlement rate method is used in the analysis and is effective.The analysis also demon strates that the crest reinforcement is a scientific and rational seismic reinforcement technology for embankment dam.更多还原