Numerical simulation of segment floating in shield tunnel construction using coupled IBM–FVM

IF 5.7 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Acta Geotechnica Pub Date : 2025-06-09 DOI:10.1007/s11440-025-02673-0

Xiaolong Li, Pengchao Li, Jiaxiang Wang, Fuming Wang, Jinhua Hu, Yanhui Zhong, Xingguo Yu

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Abstract

Segment floating, often induced by simultaneous grouting during shield tunnel construction, poses significant challenges. This paper introduces a novel fluid–solid interaction (FSI) numerical method that integrates the immersed boundary method (IBM) and finite volume method (FVM) to simulate the buoyancy-driven floating of segments in shield tunneling accurately. The IBM effectively models the interaction between the segment and the slurry, while the governing equations are discretized using the FVM on a uniform orthogonal collocated grid. The proposed method was validated using field data from two engineering cases. For Hangzhou Metro Line 7, the relative errors between the simulated and measured segment floating displacements at critical time intervals (2–10 h) were within ± 0.2%. For the Sofia Tunnel, the average absolute errors between the simulated and measured slurry pressures were 0.01–0.07 bar at the selected monitoring points and times. These results confirm the accuracy of the method in simulating rapid segment floating dynamics and real-time slurry flow behavior during shield tunnel construction. By emphasizing the key role of the FSI in addressing the complex interactions between the fluid and solid phases, this study advances the simulation of segment floating during shield tunnel construction.

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基于IBM-FVM耦合的盾构隧道施工管片浮力数值模拟

盾构隧道施工过程中，常因同时灌浆引起管段浮沉，这给盾构隧道施工带来重大挑战。本文介绍了一种融合浸入边界法（IBM）和有限体积法（FVM）的流固耦合（FSI）数值模拟方法，以准确模拟盾构隧道中管片浮力驱动的浮力过程。IBM有效地模拟了管段和浆料之间的相互作用，而控制方程则使用均匀正交并置网格上的FVM进行离散化。通过两个工程实例的现场数据验证了该方法的有效性。对于杭州地铁7号线，在临界时间间隔（2 ~ 10 h），模拟位移与实测位移的相对误差在±0.2%以内。对于索非亚隧道，在选定的监测点和时间内，模拟和实测值之间的平均绝对误差为0.01-0.07 bar。试验结果验证了该方法在盾构隧道施工过程中快速分段浮力和实时浆体流动特性模拟中的准确性。本文通过强调流固耦合在解决盾构隧道施工过程中管片浮力的关键作用，提出了盾构隧道施工过程中管片浮力的模拟。

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来源期刊

Acta Geotechnica ENGINEERING, GEOLOGICAL-

CiteScore

9.90

自引率

17.50%

发文量

297

审稿时长

4 months

期刊介绍： Acta Geotechnica is an international journal devoted to the publication and dissemination of basic and applied research in geoengineering – an interdisciplinary field dealing with geomaterials such as soils and rocks. Coverage emphasizes the interplay between geomechanical models and their engineering applications. The journal presents original research papers on fundamental concepts in geomechanics and their novel applications in geoengineering based on experimental, analytical and/or numerical approaches. The main purpose of the journal is to foster understanding of the fundamental mechanisms behind the phenomena and processes in geomaterials, from kilometer-scale problems as they occur in geoscience, and down to the nano-scale, with their potential impact on geoengineering. The journal strives to report and archive progress in the field in a timely manner, presenting research papers, review articles, short notes and letters to the editors.