旗杆山隧道大纵坡斜井溶洞处治设计及其对运营期风险分析

Treatment Design of Karst Cave in Qiganshan Tunnel Inclined Shaft with Large Longitudinal Slope and The Risk Analysis in Operation Period

旗杆山隧道斜井通过溶蚀带时,发生突水涌泥现象,对施工及后期运营带来了极大的风险和隐患。据工程地质、水文地质及现场实测数据,并结合隧道原设计情况,有针对性的提出了成套的施工处治措施和运营管养要求,斜井安全的通过了溶蚀带,并为项目建成后运营安全提供了有效的保证。本文的处治措施可为类似隧道溶洞处治提供经验。

During the construction of Qiganshan tunnel inclined shaft in karst area,water inrush and mud gushing phenomenon were found,which brought great risks and hidden dangers to the construction and operation.According to the engineering geology,hydrogeology and field measured data,combined with the original design of the tunnel,the author puts forward a complete set of construction treatment measures and operation management and maintenance requirements.The inclined shaft passes through the corrosion zone safely,and provides effective guarantee for the operation safety after the completion of the project.The treatment measures in this paper provide experience for similar tunnel in karst area.