地铁隧道小半径曲线段盾构割线始发预偏量控制方法  

Control Method on Pre⁃deviation of Shield Secant at Initial Launching in Sharp Curve Section for Metro Tunnel

作　　者：姜留涛[1] 郭军[1] JIANG Liutao;GUO Jun(Shaanxi Railway Institute,Weinan Shaanxi 714000,China)

机构地区：[1]陕西铁路工程职业技术学院,陕西渭南714000

出　　处：《铁道建筑》2020年第6期69-72,共4页Railway Engineering

基　　金：陕西铁路工程职业技术学院科研项目(Ky2017-042)。

摘　　要：城市地铁隧道小半径曲线段盾构始发姿态控制是施工质量控制中的技术难题。本文依托工程实例,建立了小半径曲线段割线始发盾构姿态数值模型,研究盾构始发姿态各影响因素及其关联性,进而提出沿割线方向预设偏转角或盾尾预偏移量的小半径曲线段盾构姿态控制方法。在北京地铁19号线区间隧道的应用表明,该方法能有效控制小半径曲线段盾构始发参数和超限风险,且给出的盾构始发各控制参数的关系表方便工程技术人员选用。The shield attitude control at initial launching in the sharp curve section for urban metro tunnel is a technical problem in construction quality control.Based on the typical engineering example,this paper established a numerical model of the shield attitude of secant initial launching in the sharp curve section,and studied the influence factors of the starting attitude of shield and their correlation,then,put forward the shield attitude control method in sharp curve section by setting deflection angle or shield tail pre-deviation along secant direction.The application in the tunnel of Beijing Metro Line 19 shows that,this method can effectively control the initial parameters and risk of overrun of the shields in the sharp curve section.The relationship table of parameters is convenient for engineers and technical personnel to refer and choose.

关 键 词：地铁隧道 预偏移量控制 数值模拟 小曲率半径段 盾构始发 割线始发 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]