长螺旋钻在复合路基上成小直径孔的清孔新技术  

New Hole-cleaning Technology for Small-diameter Drill Hole in Embankment with Long Auger

作　　者：汪学清[1] 胡德俊[1] 黄嘉林[1] 范猛[1] 宋延滨 吕帅[1] 田凤格 

机构地区：[1]中国矿业大学(北京)力学与建筑工程学院,北京100083

出　　处：《矿冶工程》2015年第2期12-14,19,共4页Mining and Metallurgical Engineering

基　　金：国家自然科学基金资助(U1361210);中央高校基本科研业务费资助(2009QL11)

摘　　要：在长螺旋钻成孔过程中,孔底残留过多虚土,以致清孔达不到要求,为解决该问题,提出了利用泥浆与虚土相结合随钻出孔的清孔新方法。分析了泥浆护壁原理,在高铁复合路基工程实例中利用成小直径孔的随钻出孔清孔新方法,效果显著,方法实用可行,开创了长螺旋钻成孔的清孔新方法。Due to the excessive loose soil left in the bottom of hole drilled with long auger, resulting in difficulty in the following hole cleaning, a new method was proposed of pouring a kind of slurry into drilling holes, resulting in the loose soil combined with the slurry out of holes. Based on the analysis of the wall protection by the drill slurry, the new method of drilling small-diameter hole with long auger while pouring slurry into hole was applied into the practical engineering project of composite s method is completely ubgrade for high-speed railway, showing a remarkable hole cleaning effect. It is concluded that the feasible and practical

关 键 词：长螺旋钻 清孔 泥浆 虚土 复合路基 

分 类 号：U415.5[交通运输工程—道路与铁道工程]