“水力压裂”技术在基岩帷幕灌浆中的应用

Application of hydraulic fracturing technology in base rock curtain grouting

针对高坝防渗帷幕施工中常见的"回浆返浓"现象,提出将能源开采行业广泛应用的"水力压裂"造缝技术引入到基岩帷幕灌浆中。利用范围、宽度可控的人造裂缝解决了传统水泥灌浆时由于岩石隐微裂缝发育造成的浆液清水失水,水泥颗粒剩余返浓情况,避免了细水泥、化学灌浆施工的固有缺陷,为帷幕灌浆施工提供了一种新思路。

In view of the back slurry returning thick frequently seen during high dam anti-seepage curtain grout- ing, it is suggested to adopt the hydraulic fracturing technology that has been widely applied in energy mining in- dustry in base rock curtain grouting. Cementing slurry may loss water and return thick due to slight cracks devel- oped in the rock in case of traditional cement grouting. Artificial cracks with controllable range and width can pre- vent the inherent shortage of fine cement or chemical grouting, which is a new idea for curtain grouting.