大花水水电站拱坝中孔闸墩裂缝成因分析及处理措施研究  

Cause Analysis and Treatment Measures of Cracks in Mid-Level Outlet Pier of Arch Dam of Dahuashui Hydropower Station

作　　者：孔信 罗永刚 鲁传银 KONG Xin;LUO Yonggang;LU Chuanyin(Guizhou Wujiang Qingshuihe Hydropower Development Co.,Ltd.,Guiyang,Guizhou,550002;PowerChina Guiyang Engineering Corporation Limited,Guiyang,Guizhou,550081)

机构地区：[1]贵州乌江清水河水电开发有限公司,贵州贵阳550002 [2]中国电建集团贵阳勘测设计研究院有限公司,贵州贵阳550081

出　　处：《红水河》2021年第4期70-74,共5页Hongshui River

摘　　要：针对大花水水电站中孔闸墩出现的裂缝,采用三维实景建模和表面波法等手段对缝隙分布情况进行检测,并通过泄洪振动监测缝隙开度变化。结合中孔闸墩裂隙现状,运用三维非线性有限元分析方法对缝隙成因、缝隙对大坝安全影响进行分析,并提出对缝隙的处理措施。结果表明:中孔闸墩裂缝是闸墩在复杂高应力状况下引起的温度裂隙;裂隙在采用化学灌浆处理后,不影响大坝整体安全,大坝处于安全状态。In view of the cracks in the mid-level outlet pier of Dahuashui Hydropower Station,three-dimensional real modeling and surface wave method are used to detect the cracks distribution,and the change of crack opening is monitored by flood discharge vibration.Combined with the present situation of cracks in mid-level outlet pier,the causes of cracks and the influence of cracks on dam safety are analyzed by three-dimensional nonlinear finite element analysis method,and the treatment measures of cracks are put forward.The results show that the cracks in the mid-level outlet pier are the temperature cracks caused by the pier under complex high stress conditions.After chemical grouting treatment,cracks do not affect the overall safety of the dam,and the dam is in a safe state.

关 键 词：拱坝 中孔 闸墩 裂缝 原因分析 处理 大花水水电站 

分 类 号：TV698.231[水利工程—水利水电工程]