微流场渗流检测技术在水库渗漏处理中的应用研究

Application of Microflow Field Seepage Detection Technology in Reservoir Seepage Treatment

渗漏是影响水库大坝整体安全的关键因素,如何有效的检测水库大坝的渗漏点、渗漏通道和渗漏流速等一直是坝工安全领域研究的热点。针对目前水库大坝渗漏点难以精确定位和对渗漏量测量不准确等问题,阐述了声呐流速测量原理,提出了微流场渗流检测技术,并依托板桥水库实际工程展开应用。通过采用“DB-VI三维流速矢量声纳测量仪”,对板桥水库混凝土溢流坝裂缝渗漏通道进行检测,精细地测量出声波在流体中能量传递的大小与分布,同时,结合水下摄像进行了验证,确认了主要渗漏点的位置,为采取针对性的处理措施提供了依据。

Leakage is a key factor affecting the overall safety of dams.How to effectively detect the leakage point,leakage channel and leakage velocity has always been a hot research topic in the field of dam safety.In view of the problems of locating the leakage point inaccurately and measuring the leakage quantity inaccurately,the principle of sonar velocity measurement is expounded,and the seepage detection technology of micro-flow field is put forward and is applied in the practical project of Banqiao Reservoir.By adopting DB-VI three-dimensional velocity vector sonar measuring instrument,the crack leakage channels of concrete overflow dam in Banqiao Reservoir is detected,and the size and the distribution of acoustic energy transfer in the fluid are precisely measured.At the same time,combined with underwater camera verification,the positions of major leakage points are confirmed,which provides a basis for the corresponding treatment measures.