叙毕铁路新高坡隧道巨型岩溶空腔处治措施研究

Research on Treatment Measures for Giant Karst Cavity on Xingaopo Tunnel on Xuyong-Bijie Railway

叙毕铁路新高坡隧道岩溶发育强烈,施工过程中揭示巨型溶洞,且溶洞侵入隧道,严重影响施工及运营安全。结合岩溶整治决策因素,以隧道施工过程揭示的溶洞为典型处理案例,分析总结不同位置充填溶洞的处理原则。结合岩溶形态、地质条件,充分考虑隧道位置、充填物性质、地下水等影响因素,在保证结构稳定并兼顾施工与运营安全的前提下,从结构型式、基底处理、永久排水通道等方面提出具体处理措施,对类似岩溶地区隧道工程具有重要的参考价值。

The karst in the Xingaopo Tunnel on the Xuyong-Bijie Railway is strongly developed,and giant karst caves are revealed during the construction process,and the caves invade the tunnel,seriously affecting the safety of construction and operation.Based on the decision-making factors of karst treatment,karst caves revealed during tunnel construction are taken as a typical treatment case,to analyze and summarize the treatment principles for filling-type karst caves at different positions.By combining with karst morphology and geological conditions and fully considering factors such as tunnel location,filling properties and groundwater,while ensuring structural stability and considering construction and operation safety,specific treatment measures are proposed from aspects of structural type,foundation treatment and permanent drainage channel,which has important guiding value for tunnel engineering in similar karst areas.