盾构隧道内力分析方法的校验与选择研究  

Verification and Selection of Shield Tunnel Internal Force Analysis Method

作　　者：董新平[1] 李宗艺 朱磊[1] DONG Xin-ping;LI Zong-yi;ZHU Lei(Department of Communication Engineering,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]郑州大学交通运输工程系,郑州450001

出　　处：《铁道标准设计》2018年第7期120-124,共5页Railway Standard Design

基　　金：河南省基础与前沿研究课题(152300410031)

摘　　要：为对目前常用的盾构隧道内力分析方法和分析模型进行检验和验证,在三环足尺试验基础上构建单环加载案例作为校验标准,以该校验标准就内力分析模型的影响及条件等进行比较和研究,结果表明:在选择盾构隧道衬砌分析模型和分析方法时,应考虑隧道衬砌结构所受荷载水平;荷载水平较低,若环间作用和地层约束作用弱,盾构隧道衬砌结构设计时,可采用自由变形圆环模型(惯用法),以简化设计过程;荷载水平较大,局部管片接头可能进入非线性转动阶段,不考虑管片接头非线性引起的误差可达20%,梁-弹簧模型中考虑管片接头非线性是必要的。To verify the analysis model for segmented tunnel lining,one full-scale test of the single ring is constructed and taken as benchmark. The influence of rotational stiffness of segment joint on the bending moment of segment and its mandatory conditions are analyzed. The results show that the selection of the analysis model and method should take account of the level of load acting on the tunnel lining structure.In the case of low level of load and weak interaction between rings and weak stratum restraint,free deformation ring model could be employed to simplify the design. In the case of high level of load,some local segment joints may come into non-linear rotation stage,and the error may reach as high as 20%irrespective of the non-linear of the segment joints. Thus,it is necessary to take into consideration of the non-linear of the segment joints in the beam spring model.

关 键 词：隧道工程 盾构 内力分析方法 管片接头 弯矩偏转 

分 类 号：U455.7[建筑科学—桥梁与隧道工程]