隧道进口穿越断层破碎带洞身开挖施工分析  

Analysis on excavation construction of tunnel entrance through fracture zone of fault

作　　者：王艺芳 WANG Yifang(First Engineering Co.,LTD.,China Railway 18th Bureau Group,Zhuozhou 072750,China)

机构地区：[1]中铁十八局集团第一工程有限公司,河北涿州072750

出　　处：《佛山科学技术学院学报（自然科学版）》2024年第4期41-48,共8页Journal of Foshan University(Natural Science Edition)

摘　　要：为探讨隧道进口穿越断层破碎带洞身开挖施工,以立洲水电站工程实例为背景,分析了三台阶设置临时仰拱法在穿越断层破碎带洞身开挖中的应用。分析表明,断层破碎带洞身地质条件复杂,围岩稳定性比较差,存在塌方的概率比较大,利用三台阶设置临时仰拱法配合系统锚杆、钢筋网、钢架及湿喷混凝土联合支护的施工方法,既能保证施工效率,也可以很好地控制塌方问题,促使施工任务高效、安全、有序完成,可为类似工程施工提供参考和借鉴。In order to discuss the excavation of tunnel entrance through fault fracture zone,the application of three-step temporary invert method in tunnel excavation through fault fracture zone was analyzed based on Lizhou Hydropower Station project.The analysis shows that the geological conditions of the hole body in the fault fracture zone are complicated,the stability of surrounding rock is relatively poor,and the probability of collapse is relatively large.The construction method of using the temporary invert method with the combination of system anchor rod,steel mesh,steel frame and wet shotcrete can not only ensure the construction efficiency,but also effectively control the collapse problem.The construction task can be completed efficiently,safely and orderly,which can provide reference for similar engineering construction.

关 键 词：隧道进口 断层破碎带 洞身开挖 三台阶 仰拱法 

分 类 号：TV672.1[水利工程—水利水电工程]