Investigation on the force transmission performance between segmental rings of super-large cross-section shield tunnels

IF 6.7 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Tunnelling and Underground Space Technology Pub Date : 2025-06-10 DOI:10.1016/j.tust.2025.106779

Wenqi Guo , Kun Feng , Haixing Mu , Jiaqi Li , Yili Zhou , Chuan He

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Abstract

With the development of shield tunnels towards larger cross-sections and more complex joint structures, the longitudinal–transverse coupling effect of segment structures has become increasingly significant. Assessing the force transmission effect between segmental rings is crucial for optimizing segment structures design. A full-scale loading test was conducted on staggered joint assembly segment structures to investigate the deformation of the segments, deformation of the joints, mechanical behavior of the reinforcement and bolts, force transmission behavior between segmental rings, as well as the failure progression and patterns of the segment structures. Based on this, a detailed 3D numerical calculation model, calibrated through full-scale tests, was utilized to analyze the effects of longitudinal pressure on the deformation of segment structures and the moment transfer coefficient between segmental rings. The findings indicate that the upper half-ring segment exhibited greater deformation compared to the lower half-ring segment, while both were larger than that of the middle ring segment. The longitudinal joint opening and circumferential joint dislocation in the upper half-ring segment underwent five distinct phases, whereas the lower half-ring segment experienced only three stages of variation. The difference in the mechanical behavior of longitudinal bolts resulted in greater shear stiffness for the circumferential joint under ordinal shear conditions compared to reverse shear. The evolution of the moment transfer coefficient occurred in four distinct phases. The contact between mortise and tenon markedly increased this coefficient, while plastic hinge formation in the segment structures led to a sharp decline. Additionally, the maximum moment transfer coefficient showed a positive relationship with longitudinal pressure, ranging from 0.4 to 0.7 when the pressure was between 0 and 3.0 MPa.

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超大断面盾构隧道管片环间传力性能研究

随着盾构隧道向大断面、复杂节理结构方向发展，管片结构的纵横耦合效应日益显著。评估管片环之间的力传递效应是优化管片结构设计的关键。通过对错开节理组合管片结构进行全尺寸加载试验，研究了错开节理组合管片结构的变形、节点变形、钢筋和螺栓的力学性能、管片环间的传力行为以及管片结构的破坏进程和破坏模式。在此基础上，通过全尺寸试验标定了详细的三维数值计算模型，分析了纵向压力对管片结构变形和管片环间力矩传递系数的影响。结果表明，上半环比下半环变形更大，而上半环比下半环变形大。上半环段关节纵向开口和关节周向脱位经历了5个不同阶段，而下半环段仅经历了3个阶段的变化。纵向螺栓力学性能的差异导致环向节点在顺剪条件下比反剪条件下具有更大的抗剪刚度。弯矩传递系数的演变分为四个不同的阶段。榫卯之间的接触显著增加了该系数，而在节段结构中形成塑性铰导致该系数急剧下降。最大弯矩传递系数与纵向压力呈正相关，在0 ~ 3.0 MPa压力范围内，最大弯矩传递系数在0.4 ~ 0.7之间。

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来源期刊

Tunnelling and Underground Space Technology 工程技术-工程：土木

CiteScore

11.90

自引率

18.80%

发文量

454

审稿时长

10.8 months

期刊介绍： Tunnelling and Underground Space Technology is an international journal which publishes authoritative articles encompassing the development of innovative uses of underground space and the results of high quality research into improved, more cost-effective techniques for the planning, geo-investigation, design, construction, operation and maintenance of underground and earth-sheltered structures. The journal provides an effective vehicle for the improved worldwide exchange of information on developments in underground technology - and the experience gained from its use - and is strongly committed to publishing papers on the interdisciplinary aspects of creating, planning, and regulating underground space.