卵石层成孔钻进施工工艺

摘要

This paper analyses drilling freezing hole vertical airshaft in HuiChun mine.With the actual conditions and technical requirements taken into account,the relevant construction technologies are given.And it is pointed out different drilling coefficient and drilling tools should be applied to different rock layer,and the cement slurry be mixed accordingly.The technique is capable of ensuring the quality of hole,shortening freezing time and total period of construction.%为解决卵石砂土层钻孔灌注桩成桩难、易塌孔的难题,结合珲春矿某竖直风井冻结孔打钻施工中的实际情况和技术要求,给出施工工艺及措施,指出不同的岩层应采用不同的钻进系数和钻具,要合理调配泥浆.该工艺保证了成孔的质量,缩短了冻结时间和施工总工期.