泸定水电站3号消力池直立边坡管桩加固施工技术

Pipe Pile Reinforcement for the Vertical Slopes of No.3 Stilling Basin in Luding Hydropower Station

大渡河泸定水电站3号泄洪洞消力池左右边墙设计为高27 m的直立边坡,由于两侧边坡存在较大地质缺陷,边坡稳定性较差,因此采取了直立边坡岩体的预固结灌浆及钢管灌注桩加固措施,以增加岩体的完整性并形成连续幕墙,从而确保了边坡安全并加快了工程建设进度。

The right and left side wall of stilling basin for the No. 3 spillway tunnel in Luding Hydropower Station are designed as vertical slope with a height of 27 m. As the serious geologieal defects besides the stilling basin, the stability of slopes is poor. The roek mass surrounding the slopes are reinforced by taking pre-consolidation grouting and steel pipe piles to increase the integrity of rocks and form a continuous curtain wall. The safety of the slopes is guaranteed and the construction progress is speeded up.