临近既有线强风化硬岩隧道洞外排水施工技术

摘要

介绍了严寒地区临近既有线强风化硬岩隧道洞外排水施工工艺,着重阐明了破碎锤及防护排架在此类条件下综合运用的可行性及合理性,为进一步推广应用奠定了基础。%This paper introduced hole drainage construction technology of cold region near existing line hard rock tunnel,emphatically elaborated integrated use feasibility and rationality of quartering hammer and protective bent in such conditions,laid foundation f