摘要
在堆积体及破碎的岩体边坡锚索施工中较容易出现卡钻、埋钻、洗孔困难等现象,而且施工安全、质量、进度、成本得不到很好的控制。采用跟管钻进工艺钻至一定深度后,换用138直钎继续钻进至终孔,并在钻进过程中进行必要的固壁灌浆,以利于非跟管段的孔壁稳定,避免卡钻、埋钻等现象的发生,有利于减少事故、提高功效;此方法可用于各种特殊地质情况,钻进方法更加稳妥,钻进速度更快,施工质量更好,投资更省。
Tool sticking, drill burying, difficult drill washing and other phenomena are produced more easily in accumulation body and fragmented rock slope anchor construction. Construction safety,quality,schedule and cost cannot be well controlled. Pipe drilling process is adopted for drilling to certain depth,and 138 straight drill is used for drilling to final hole continuously. Necessary wall fixation and grouting should be implemented during the drilling process,thereby facilitating hole wall stabilization in the non-pipe section,avoiding tool sticking,drill burying and other phenomena,and being beneficial for reducing accident and improving benefits. The method can be used in various special geological conditions with higher reliability. It is characterized by faster drilling speed, better construction quality and more economical investment.
出处
《中国水能及电气化》
2015年第4期9-13,共5页
China Water Power & Electrification
关键词
堆积体
锚索
钻孔工艺
accumulation body
anchor
drilling process
