桓仁单支墩大头坝安全性评价  

Safety Evaluation on Huanren Massive-head Single Support Pier Dam

作　　者：宋恩来[1] 

机构地区：[1]辽宁省电力有限公司,辽宁沈阳110006

出　　处：《东北电力技术》2008年第6期1-6,共6页Northeast Electric Power Technology

摘　　要：在桓仁大坝共发现裂缝2 084条,其中上游面的劈头缝威胁大坝安全。为此,先后采取在上游面做防渗层、背面打"砂浆棒"、对封腔盖板进行改造等一系列工程措施。采取措施后,现场检查和监测表明,大坝渗漏水明显减少,坝腔温度升高、温差变幅减小,劈头裂缝稳定。大坝三次安全定期检查均被评定为正常坝。2084 cracks are found on Huanren dam, among which cleavage cracks in upstream surface threatens the saiety ot the dam. As a result, a series engineering measures are taken such as construction of seepage-prevention layer, of mortar bar on the backside and the modification of seal cavity cover-plate. After all these measures, field checkup and monitoring shows that water penetration decreased obviously, temperature of dam cavity raised, temperature difference minimized, cleavage cracks remained stable. The dam is assessed normal in the following three periodic checkups.

关 键 词：支墩坝 劈头裂缝 加固处理 正常坝 

分 类 号：TV698.1[水利工程—水利水电工程] X913[环境科学与工程—安全科学]