摘要： 桓仁和湖南镇两座单支墩大头坝在施工期均出现一些劈头裂缝，经工程处理后一直安全运行。现对其劈头裂缝稳定性进行分析和评价。

Abstract: Abutment cracks appeared respectively in the construction period of Huanren and Hunanzhen single supporting pier solidhead buttress dams, which were treated once. This paper analysed and appraised the stability of abutment cracks.