穿心墙钻孔安装阵列式位移计实例

Example of Array Displacement Meter Installed in Core Wall Drilling

阵列式位移计穿心墙钻孔安装主要用于运行期心墙堆石坝坝体变形过大而采用的补充监测措施,在国内属首次。穿心墙安装阵列式位移计须确定孔位要高于校核水位,钻孔孔向控制要求严格,同时仪器安装完成后钻孔灌浆应与心墙接触良好且能保证其强度与心墙相接近。以苗尾水电站为例,介绍穿心墙钻孔安装阵列式位移计在工程中的应用。

It is the first time in China that the drilling and installation of array displacement meter through core wall is used as supplementary monitoring measure for excessive deformation of core wall rockfill dam during operation period.The array displacement meter installed through the core wall must determine that the hole position is higher than spillway design flood level and the control of drilling hole orientation is strict.At the same time,after the installation of the instrument,the drilling grouting should contact the core wall well and ensure that its strength is close to the core wall.Taking Miaowei Hydropower Station as an example,this paper introduces the application of array displacement meter in engineering by drilling through core wall.