大田水库病险原因分析及加固方案

Disease Causes Analysis and Reinforcement Scheme for Datian Reservoir

大田水库最大坝高35.5m,坝顶长199m、坝顶宽4.8m,坝顶高程596.10m。2008年对大坝进行安全鉴定时,发现大坝下游574m高程有散浸现象,散浸面积达到776m2,初步认定产生此病害的原因为下游褥垫排水层失效。针对大田水库下游出现大面积散浸的病害现状,分析了产生此病害的的原因,针对分析结果制定了修复失效褥垫的整治方案。

The Datian reservoir＇s dam is 35.5m high,crest length is 199m,crest width is 4.8m,crest elevation is 596.10m.In 2008 after safety appraisal,the authors found that downstream of the dam at 574m elevation had seepage phenomenon and the seepage area was almost 776 square meters.The authors firstly cognized that the reason for this disease was the mattress pad drainage＇s failure to work.Based on this phenomenon,the authors analyzed the causing reason and put forward repairing scheme.