摘要
主要论述在坚硬的石英岩层,节理极其发育,涌水压力达0.2 MPa,涌水量达20 t/h的施工条件下,采用特殊钻头全面钻进不提钻、稳定浆液灌浆并适当提高灌浆压力(把涌水压力考虑进去)的边固边灌,在涌水严重孔段采用适当延长屏浆时间等措施,取得了满意的效果,满足了设计的要求。
The paper discussed full-face drilling without drill pipe lifting and consolidating by stable grouting with the pressure increasing in hard quartzite layer with developmental joints. Close grouting time was prolonged in serious water gushing segment to meet the design requirement.
出处
《探矿工程（岩土钻掘工程）》
2009年第8期64-65,68,共3页
Exploration Engineering:Rock & Soil Drilling and Tunneling
关键词
坝基
帷幕灌浆
涌水
破碎
节理
裂隙
排水孔
dam foundation
curtain grouting
water gushing
broken
joint
fracture
drainage hole
