中国铁道科学2018，Vol.39Issue(2)：52-60,9.DOI:10.3969/j.issn.1001-4632.2018.02.07
盾构隧道管片环向接头刚度的解析分析法
Analytical Method for Circumferential Joint Stiffness of Segment Ring in Shield Tunnel
摘要
Abstract
Based on the detailed structure of the segment joint of shield tunnel,different mechanical mechanisms of segment joint before and after separation under positive and negative moments were analyzed.By establishing the mechanical equilibrium relationship of joints,the nonlinear analytical formulae for the tensile stiffness and bending rigidity of joints before and after separation under positive and negative bending moments were given,and the linear analytical formulae for the compressive stiffness and shear stiffness of joints were also given.The mechanical parameters of the joint were obtained by using the given analytical formulae.Then,the internal forces and deformation characteristics of the 3 models were compared by establishing the homogeneous ring model,the linear joint model and the nonlinear joint model.Results show that the bending rigidity of the joint will change suddenly when the joint is separated,which will be weakened to a certain degree compared with that before the separation.Bolt pretightening force is the main factor that affects the tension of the bolt when the joint is separated,and determines the rotating angle when the joint is separated.Considering the joint effect,the bending moment and shear force of the lining will obviously decrease,the deformation of the lining will increase to a great extent,but the impact on the axial force will be smaller.The bending stiffness of the joint is weakened,the bending moment of the segment ring is further reduced,and the deformation still has a tendency to expand further after the circumferential joint of segment ring is separated.关键词
盾构隧道/环向接头/接头刚度/解析公式/弯矩/剪力/轴力Key words
Shield tunnel/Circumferential joint/Joint stiffness/Analytical formula/Bending moment/Shear/Axial force分类
交通工程引用本文复制引用
晏启祥,陈行,吴聪,宋乐阳,陈文宇,黄希..盾构隧道管片环向接头刚度的解析分析法[J].中国铁道科学,2018,39(2):52-60,9.基金项目
国家重点研发计划(2016YFC0802205) （2016YFC0802205）
国家科技支撑计划项目(2013BAB10B04) （2013BAB10B04）
国家自然科学基金资助项目(51178400,51278425) （51178400,51278425）
