摘要
混凝土大坝在施工及运行过程中会产生裂缝,裂缝是渗漏水的主要原因。通常采用在渗漏部位截断渗水途径、封闭或改变渗漏水逸出点的方法处理渗漏水,效果往往不甚理想。随着施工技术及材料的不断改进与提高,对漏水源进行封闭处理已成为现实。棉花滩大坝2号坝段33号裂缝为劈头裂缝,廊道内对应部位漏水量高达110L蛐min,对其采用了水下处理。处理方案主要包括骑缝切槽、水下灌浆、骑缝切V形槽、嵌压SR止水材料、粘贴SR防渗盖片等。处理后漏水量已降为零,效果显著。该方法对类似工程有借鉴作用。
The cracks were often occurred during the construction of the concrete dams that resulted in leakage. Generally, the leakage was treated by cutting off the leakage path, sealing or changing the leakage exit point. But the results were often unsatisfactory. Along with the improvement of construction technology and construction materials, it came true for sealing and blocking the leakage source. The cracks in the dam block No.2 at Mianhuatan dam were splitting cracks, and the leakage quantity at the corresponding area in the gallery was up to 110 L/min and had been taken measures. The treating schemes were included the followings: slotting across cracks, grouting under water, V-shaped slotting across cracks, caulking SR materials, pasting impervious SR cover sheet. The result was remarkable after treating. It's of reference for the similar projects.
出处
《水力发电》
北大核心
2005年第1期74-76,共3页
Water Power
关键词
碾压混凝土坝
裂缝
水下处理
棉花滩水电站
RCC dam, cracks, treatment under water, Mianhuatan Hydropower Station
