采用高喷灌浆技术处理温峡口坝基隐患的试验研究

Experiment for Treating Hidden Troubles in Wenxiakou Dam Foundation by High Pressure Spraying Grouting

高喷灌浆技术作为日益成熟的基础处理技术在砂性地层中的使用效果较好,但在大坝粘土心墙和风化基岩中进行高压旋喷灌浆尚不多见。在温峡口水库大坝粘土心墙与风化可溶岩接触带之间,采用高压旋喷灌浆技术建造一定高度的连续高喷墙体,截断基岩表层裂隙和强风化层的渗漏并形成灌浆盖板,进而实施基岩防渗帷幕灌浆的试验获得成功,为该水库大坝基础防渗处理施工奠定了坚实的基础,也为同类型病险水库大坝基础的防渗处理探索了一条新途径。

Using the high pressure whirly spraying method, an anti-seepage diaphragm was built in the connective zone of clay core of Wenxiakou dam with the weathering layer of the rock foundation to cut off the seepage path through the weathering layer. After that, the anti-seepage curtain beneath the diaphragm was grouted successfully.