岩溶区隧洞施工处理措施分析

Analysis of Construction Treatment Measures for Tunnels in Karst Areas

隧洞穿越强岩溶发育区时,易发生涌水、突泥、地表塌陷等事故。使用现有勘察手段,包括高密度电法勘探、钻孔验证等方式,初步查明溶洞的分布、位置、物理尺寸、内部充填物性状等基本参数后,针对溶洞的处理尤为重要。以工程案例为依托,针对岩溶区隧洞施工处理方案,从地面处理与洞内处理两方面重点研究,分析基本可行的溶洞处理措施,降低施工期事故风险。在总承包模式项目推进中,了解溶洞基本情况,评估岩溶区域对项目的影响程度,基本明确岩溶区施工进度与工程造价,对项目顺利推进可起到重要作用。

When a tunnel passes through a strong karst development zone,accidents such as water inrush,mud outburst,and surface collapse are prone to occur.After preliminary determination of the distribution,location,physical size,and internal filling characteristics of the karst cave using existing survey methods,including high-density electrical exploration and borehole verification,the treatment of the karst is particularly important.Based on engineering cases,this article focuses on the construction treatment plan for tunnels in karst areas,with an emphasis on both surface treatment and in-cave treatment,analyzing feasible measures to reduce the risk of accidents during the construction period.In the progress of general contracting mode,understanding the basic situation of the karst cave,assessing the impact of the karst area on the project,and roughly determining the construction schedule and project cost in the karst area can play an important role in the smooth progress of the project.