Three-dimensional hydro-mechanical coupling numerical simulation of shield-driven cross-river twin tunnels: A case study

IF 8.2 1区 工程技术 Q1 ENGINEERING, CIVIL
Chengwen Wang , Xiaoli Liu , Danqing Song , Enzhi Wang , Guohui Yan , Ran Zhou
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引用次数: 0

Abstract

With the rapid development of urban underground space, the construction of shield-driven cross-river twin tunnels is increasing, and the complex hydro-mechanical coupling effects and twin-tunnel interactions bring huge construction risks to such projects, which have attracted more and more attention. This study aims to understand the excavation effects induced by shield driving of cross-river twin tunnels through numerical simulation. A refined three-dimensional numerical model based on the fully coupled hydro-mechanical theory is established. The model considers the main components of the slurry pressure balance shield (SPBS) machine, including support force, jacking thrust, grouting pressure, shield-rock interaction and lining-grouting interaction, as well as the detailed construction process. The purpose is to examine the excavation effects during construction, including rock deformation around tunnels, the change in pore pressure, and the response of the lining. The results show the influence range of twin-tunnel excavation on rock deformation and pore pressure, as well as the modes of lining response. In addition, this study also systematically investigates the effects of water level fluctuation and burial depth on twin-tunnel excavation. The results indicate that the increase of water level or burial depth will enhance the excavation effects and strengthen the twin-tunnel interactions. These results provide useful insights for estimating the construction impact range and degree of twin tunnels, and serve as basic references for the design of cross-river twin tunnels.

盾构驱动过江双线隧道的三维水力机械耦合数值模拟:案例研究
随着城市地下空间的快速发展,盾构法施工的跨江双洞隧道越来越多,复杂的水力机械耦合效应和双洞相互作用给此类工程带来了巨大的施工风险,已引起越来越多的关注。本研究旨在通过数值模拟了解盾构法掘进跨江双线隧道的开挖效应。研究建立了基于水力机械全耦合理论的精细三维数值模型。该模型考虑了泥浆压力平衡盾构机的主要组成部分,包括支撑力、顶推力、注浆压力、盾岩相互作用和衬砌-注浆相互作用,以及详细的施工过程。目的是研究施工过程中的开挖效应,包括隧道周围岩石的变形、孔隙压力的变化以及衬砌的响应。结果显示了双隧道开挖对岩石变形和孔隙压力的影响范围,以及衬砌的响应模式。此外,本研究还系统研究了水位波动和埋深对双隧道开挖的影响。结果表明,水位或埋深的增加会增强开挖效果,加强双隧道的相互作用。这些结果为估算双洞隧道的施工影响范围和影响程度提供了有益的启示,为跨江双洞隧道的设计提供了基本参考。
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来源期刊
Underground Space
Underground Space ENGINEERING, CIVIL-
CiteScore
10.20
自引率
14.10%
发文量
71
审稿时长
63 days
期刊介绍: Underground Space is an open access international journal without article processing charges (APC) committed to serving as a scientific forum for researchers and practitioners in the field of underground engineering. The journal welcomes manuscripts that deal with original theories, methods, technologies, and important applications throughout the life-cycle of underground projects, including planning, design, operation and maintenance, disaster prevention, and demolition. The journal is particularly interested in manuscripts related to the latest development of smart underground engineering from the perspectives of resilience, resources saving, environmental friendliness, humanity, and artificial intelligence. The manuscripts are expected to have significant innovation and potential impact in the field of underground engineering, and should have clear association with or application in underground projects.
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