暗挖出入口爬坡段穿越富水卵石层施工安全保证优化措施

Safety Optimization Measures for Underground Exit Tunnel Climbing Excavation through Water-rich Gravel Construction

北京地铁9号线军事博物馆站车站主体出入口穿越富水卵石层,根据现场实际,通过反复论证优化,采取了在出入口过水段增设水平导洞进行洞内治水的安全保证优化措施,保证了施工安全及工程进度。

The main entrance of Beijing Metro Line 9 Military Museum Station goes through water-rich gravel layer.Based on the field situation,through repeated demonstration optimization,the optimization measures as the addition of level pilot tunnel in the import and export of water section are taken to control water inside the tunnel so as to ensure the construction safety and project progress.