摘要
文章以复合腔体加固盾构隧道极限承载力足尺试验为背景,提出一种可用于模拟盾构隧道结构加固工况的非线性叠合模型,用不同的材料定义复合腔体和管片,用双向弹簧单元模拟未加固隧道与复合腔体间的粘结,并通过对比足尺试验结果,对模型的有效性进行了验证;同时详细地描述了一些关键参数的取值,并通过数值模拟结果形象地描述了结构的受力性能和破坏机理,为运营地铁盾构隧道的工程加固提供了优化建议。
Based on a full-scale test to verify the ultimate bearing capacity of a shield tunnel reinforced with a composite cavity,a non-linear additive model that can be used to simulate the structural reinforcement of the shield tunnel is presented,in which the composite cavity and segment are defined by various materials,and the bi-directional spring unit is adopted to simulate the bonding between a non-reinforced tunnel and the composite cavity.Additionally,the effectiveness of the model is verified by means of a comparison with the results of fullscale test.Furthermore,the values of some key parameters are described and the stress on the tunnel structure and failure mechanism are presented based on the simulated results,thereby providing a reference for the reinforcement optimization of operated shield tunnels.
出处
《现代隧道技术》
EI
北大核心
2014年第5期78-84,91,共8页
Modern Tunnelling Technology
关键词
复合腔体
盾构隧道加固
非线性叠合模型
足尺试验
Composite cavity
Shield tunnel reinforcement
Non-linear additive model
Full-scale test
