杨柳溪水库坝肩卸荷岩体绕渗问题研究

Study on the Seepage of Unloading Rock Mass around Dam Abutment of Yangliuxi Reservoir

以位于正安县中观镇南面的晏溪村境内的杨柳溪水库为例,在概述水库右坝肩卸荷岩体结构特点及地质条件的基础上,应用有限元分析工具对防渗帷幕水平深度、垂直深度及渗透性等展开分析。结果表明,水库坝肩卸荷岩体绕坝渗流损失量较大,为有效阻止库水绕坝肩渗流,应将水平防渗深度布置在相对不透水层区段,帷幕灌浆深度应达到50~60 m。

Taking Yangliuxi Reservoir in Yanxi Village,which is located in the south of Zhongguan Town,Zheng'an County,as an example,on the basis of summarizing the unloading rock mass structure characteristics and geological conditions of the right abutment of the reservoir,the horizontal depth,vertical depth and permeability of the anti-seepage curtain are analyzed by the finite element analysis tools.The results show that the unloading rock mass around the dam abutment has a large seepage loss.In order to effectively prevent the seepage around the dam abutment,the horizontal anti-seepage depth should be arranged in the relatively impervious layer section.The curtain grouting depth should reach 50~60 m.