高压旋喷防渗技术在汉坪咀水电站中的应用

Application of Jet Rotation Grouting Technigue in Construction of Hanpingzui Hydroelectric Station

汉坪咀水电站上游围堰施工中,根据地基地质条件采用高压旋喷技术进行防渗处理。通过设备、材料、浆液性能、施工参数等实验,按照工艺过程组织施工,防渗墙建成后进行了墙体开挖检查和注水实验,其渗透系数等达到工程设计和使用要求。

In construcing upper cofferdam of Hanpingzui Hydroelectric Station, according to geologic condition the jet rotation grouting anti - seepage technique was used. By means of the tests of grouting equipment, materials, slurry performance and comstruction paramaters, the anti - seepage wall has been constructed according to the construction technique process. After the works were done, the excavation inspection and water injection test of the wail indicate that the permeability coefficient and construction quality of wall have achieve the demand of design and use.