摘要
黄登水电站导流洞进口子围堰工程中,成功运用了风动潜孔同心钻扩孔式跟管钻具。孔口采用封闭式套管内自下而上边拔边灌的膏浆灌浆施工方案,主要在松散堆积体的枯期围堰内形成了一道防渗帷幕轴线,最大可能地缩短了工期,使重力式混凝土围堰及导流洞后续工程能在汛前和汛期得以顺利施工,确保了整体工程的防洪渡汛及导流洞工程的按期分流。
In the cofferdam works for the diversion tunnel inlet of the Huangdeng hydropower project,pneumatic DTH drilling with casing was successfully applied.The construction scheme of ascending stage paste slurry grouting in the sealed casing pipe is adopted for forming an impervious curtain axis in the dry-season cofferdam of loose accumulation body,which shortens the construction period as much as possible,makes the gravity concrete cofferdam and subsequent diversion works successfully constructed before and during the flood season,and ensures flood control for the overall project and diverting through the diversion tunnel on schedule.
出处
《西北水电》
2011年第5期33-36,共4页
Northwest Hydropower
关键词
跟管钻具
堆积体
膏浆快速
成幕技术
应用
drilling with casing
accumulation body
paste-slurry curtain fast forming technology
