现代交通技术2023，Vol.20Issue(6)：60-66,7.
基于精细化模型的盾构隧道纵向变形研究
Study on Longitudinal Deformation of Shield Tunnels Based on Refined Model
摘要
Abstract
In order to investigate the stresses on the segment when the shield tunnel sinks or floats,the research uses the finite element software ABAQUS to establish a three-dimensional fine nonlinear finite element model to analyze the stress develop-ment law of connecting bolts and segment under the influence of segment rotation and staggering.The results show that bolt stress is inversely related to deformation curvature radius under the same segment opening angle.When the radius of de-formation curvature is 3 000 m and the opening angle is 0.002 0 °,the first bolt yielding phenomenon occurs.When the radius of deformation curvature is ∞ m and the opening angle is 0.040 0°,the first bolt failure occurs.When the deformation curva-ture radius is less than or equal to 1 000 m,all bolts yield regardless of the opening angle.From the analysis of the connecting bolts in the direction of the torus,it can be seen that the stress development of each bolt on the torus has three stages of devel-opment.When the opening angle increases or the deformation curvature radius decreases,the tensile stress in some areas of the segment begins to decrease and gradually develops into a plastic tensile stage.In the range of small deformation curvature radius(300～2 000 m),the maximum principal compressive stress level of the segment depends more on the size of the deform-ation curvature radius,and changes less with the increase of the rotation angle.关键词
盾构隧道/精细化模型/张开角/变形曲率半径/螺栓/应力Key words
shield tunnel/refined model/opening angle/deformation curvature radius/bolt/stress分类
建筑与水利引用本文复制引用
金明,张存,陈龙,袁云辉,王二丽..基于精细化模型的盾构隧道纵向变形研究[J].现代交通技术,2023,20(6):60-66,7.基金项目
国家自然科学基金(51978523) （51978523）
