多扶正器防斜钻具组合在大岗山水电站帷幕灌浆工程中的应用  

Application of Multi-stabilizer Anti-deflection BHA in the Curtain Grouting Engineering at Dagangshan Hydropower Station

作　　者：赵国法 邱顺兵[2] 韦猛[2] 

机构地区：[1]浙江省地勘投资发展有限公司,浙江杭州310007 [2]成都理工大学环境与土木工程学院,四川成都610059

出　　处：《探矿工程（岩土钻掘工程）》2013年第4期71-74,共4页Exploration Engineering:Rock & Soil Drilling and Tunneling

摘　　要：大岗山水电站帷幕灌浆工区施工局限性显著、地层自然造斜力强,灌浆孔孔斜设计要求高,其顶角要求≤0.5°/100 m,防斜技术难度大。采用多扶正器防斜钻具组合,有效地限制了灌浆孔轴线顶角变化和孔底偏移量,控制了灌浆孔弯曲偏斜,灌浆孔成孔质量明显提高,获得了较好的经济效益。The dykes of curtain grouting work area in Dagangshan hydropower station are steep and the environmental limi- tation and natural deflecting force of formation are significant. So the design of hole-deflection is strict and the vertex angle requirement is up to ≤0.5°/100 m. By using multi-stabilizer anti-deflection BHA, the grouting hole axis vertex angle changing and hole bottom offset were effectively limited and the grouting hole bending deflection was controlled with the quality of grouting holes significantly improved.

关 键 词：帷幕灌浆孔 防斜钻具 扶正器 孔底偏移量 大岗山水电站 

分 类 号：P634.7[天文地球—地质矿产勘探] TV543[天文地球—地质学]