坡录元隧道软弱围岩超前支护技术研究  

Research on Advanced Support Technology for Weak Surrounding Rock in the Poluyuan Tunnel

作　　者：李亮亮 LI Liang-liang(Municipal Engineering Co.,Ltd.of China Railway 18th Bureau Group,Nanning 530031,China)

机构地区：[1]中铁十八局集团市政工程有限公司,南宁530031

出　　处：《广东水利电力职业技术学院学报》2024年第4期47-50,共4页Journal of Guangdong Polytechnic of Water Resources and Electric Engineering

摘　　要：管棚超前支护作为隧道施工一种重要的加固措施被广泛应用于各类工程。为探究管棚超前支护参数对软弱围岩隧道稳定性的影响,以坡录元隧道工程为研究对象,基于管棚超前支护控制机理,采用数值计算研究分析管棚直径、加固厚度和钢管布置范围对隧道支护效果的影响,确定了管棚钢管直径、注浆加固厚度和布置角度最佳值分别为108 mm、2 m、130°,并将确定的设计参数应用于现场。研究结果表明:隧道拱顶沉降和拱腰收敛值最大值分别为9.07 mm、8.46 mm,实测值与模拟值较为相近,证实了管棚超前支护设计参数的有效性。As an important reinforcement measure in tunnel construction,pipe shed advanced support is widely used in various engineering projects.Taking the Poluyuan Tunnel project as an example,this study investigates the impact of pipe shed support parameters on the stability of tunnels in weak surrounding rock.Based on the control mechanisms of pipe shed advanced support,numerical calculations were performed to analyze the effects of pipe diameter,reinforcement thickness,and steel pipe arrangement on tunnel support effectiveness.The optimal values determined for the pipe diameter,grouting reinforcement thickness,and arrangement angle were 108 mm,2 m,and 130°,respectively,and these parameters were applied in the field.The research findings indicated that the maximum values of tunnel arch settlement and arch waist convergence are 9.07mm and 8.46mm respectively,with measured values closely matching the simulated values,confirming the effectiveness of the design parameters for pipe shed advanced support.

关 键 词：软弱围岩 管棚超前支护 支护参数 数值计算 

分 类 号：U455.4[建筑科学—桥梁与隧道工程]