大埔县洲瑞镇分水凹水库除险防渗加固研究

Research on Risk Removal and Seepage Control Reinforcement of Fengshuiao Reservoir in Zhourui Town of Dapu County

大坝防渗是小型水库除险加固的关键点,目前常用的小型水库除险加固防渗工艺有充填灌浆、劈裂灌浆、防渗墙加固和固结灌浆等。以广东省大埔县洲瑞镇分水凹水库为例,基于现状坝体压实度质量一般、坝体土料渗透系数不合格,考虑到坝体自身填筑质量较差,采用充填灌浆方法,在大坝坝顶布置充填灌浆2排,钻孔布置偏离坝轴线上下游各1m,全坝段进行充填灌浆,坝体充填灌浆防渗处理等除险加固措施取得了较好效果,值得推广。

Dam seepage control is the key point of small reservoir reinforcement.At present,filling grouting,splitting grouting,anti-seepage wall reinforcement and consolidation grouting are commonly used for small reservoirs.The present compactness quality of dam body in Fengshuiao Reservoir is general and the permeability coefficient of soil material in dam body is unqualified.Considering the poor filling quality of the dam itself,the filling grouting method is adopted in this paper.Filling grouting is arranged on the dam crest for 2 rows,and the drilling arrangement deviates from the upstream and downstream of the dam axis for 1 m.Filling grouting is carried out in the whole dam section.The dam body filling grouting seepage-proof treatment and other reinforcement measures have achieved good results and are worth promoting.