摘要
针对南通市地铁1、2号线联络线盾构区间250 m小半径、28‰大坡度的工程特点及所处的复杂环境,采用理论分析和现场实践相结合的方式,对“小半径、大坡度”盾构区间割线始发技术进行深入研究,主要从割线始发线型模拟、最佳割线角度确定、始发架与反力架安装控制、洞门密封装置优化、冷冻管拔除时序控制、始发掘进参数控制、盾构姿态控制等多方面进行分析,确定了最佳控制参数,优化了施工工艺,现场取得了良好的效果,可为同类工程提供参考和借鉴。
In view of the engineering characteristics of the 250 m small radius and 28%large slope of the shield section of the interconnection line of Nantong Metro Line 1 and Line 2 and the complex environment in which it is located,a combination of theoretical analysis and field practice was adopted to conduct in-depth research on the“small radius and large slope”shield section secant starting technology,mainly from the analysis of the simulation of the secant starting line,the determination of the optimal secant angle,the installation control of the starting frame and reaction frame,the optimization of the tunnel door sealing device,freezing pipe removal timing control,starting tunneling parameter control,shield posture control and other aspects,the optimal control parameters were determined,the construction process was optimized,and good results were achieved on the site,with a view to providing reference for similar projects.
作者
王卫星
WANG Weixing(China Railway 17^(th)Bureau Group Co.Ltd.,Taiyuan Shanxi 030006,China)
出处
《铁道建筑技术》
2023年第5期147-150,共4页
Railway Construction Technology
基金
中铁十七局集团有限公司重点科研项目(2022-30)。
关键词
复杂环境
小半径
大坡度
盾构
割线始发
complex environment
small radius
large slope
shield
secant starting
