十三陵抽水蓄能电站2~#高压管道特大塌方机理分析及其工程处理

Analysis of the rockslide and its treatment of penstock No.2 of the ming tombs pumped storage power-plant

十三陵抽水蓄能电站地下工程断层节理发育 ,地质条件复杂 ,塌方频繁 .2 # 高压管道上斜段导井在穿越 f2 0 大破碎带时发生特大塌方 ,因塌穴位于高压管道斜井上 ,处理难度大 .经过多种处理方案的实践 ,证明“地表钻孔 ,下堵上灌 ,加压注浆”处理斜井塌方比较有效 。

Rockslides frequently happened in the underground works of the Ming Tombs Pumped Storage Power-station because of its complicated geological conditions and faults or joints growing. A mass rockslide happened while the pilot shaft of penstock No.2 driving through the wide fracture zone of f 20  fault ,and it was difficult to treat because the rockslide area was in the inclined shaft. Several treatment methods were used to dispose the rockslide and it proved that the construction principles of Surface drilling hole, grouting through the hole when the pilot shaft of inclined shaft is jammed, high-pressure grouting is effective. The treatment was successful.[WX(5KG0,41]