基于地层和地质性质不确定性耦合表征的纵向隧道概率性能分析

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Tunnelling and Underground Space Technology Pub Date : 2025-03-13 DOI:10.1016/j.tust.2025.106552

Chao Zhao , Wenping Gong , C. Hsein Juang , Huiming Tang , Zhongqiang Liu , Xinli Hu

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引用次数: 0

摘要

由于隧道的纵向长度较大，且地质体的空间变异性较大，盾构隧道的地质模型（包括地层配置和地质性质）沿隧道走向变化较大。同时，地质模型的不确定性会对评价的隧道行为（如隧道纵向行为和隧道管片环周向行为）产生重大影响。然而，地层和地质性质的不确定性对隧道行为的影响尚未揭示。为此，本文提出了一种考虑地层和地质性质不确定性的隧道行为分析新框架。地质模型采用条件随机场方法进行采样，同时考虑了地层和地质性质的空间变异性。以生成的地质模型为输入，采用有限元法估计隧道纵向行为；然后，用解析解计算了隧道管片环的周向特性。通过对中国某隧道的实例分析，验证了该框架的有效性。在此基础上，结合隧道性能监测数据进行了对比分析，探讨了不确定性源对隧道性能的影响，从而说明了新框架的意义。

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Probabilistic performance analysis of longitudinal tunnels based on coupled characterization of stratigraphic and geo-properties uncertainties

The geological model (including stratigraphic configuration and geo-properties) of shield tunnels can be varied strongly along the tunnel alignment, due to the large longitudinal length of tunnels and spatial variability of geological bodies. Meanwhile, the geological model uncertainty can exert a significant influence on the evaluated tunnel behavior (e.g., tunnel longitudinal behavior and circumferential behavior of tunnel segment rings). However, the influence of stratigraphic and geo-properties uncertainties on the tunnel behavior has not been revealed. To this end, this paper presents a novel framework for the tunnel behavior analysis considering stratigraphic and geo-properties uncertainties. The geological model is sampled utilizing a conditional random field approach in the proposed framework, considering spatial variabilities of strata and geo-properties simultaneously. With generated geological models as inputs, the tunnel longitudinal behavior is estimated using a finite element method; then, the circumferential behavior of tunnel segment rings is evaluated using an analytical solution. The effectiveness of this framework is demonstrated by a case study of a tunnel in China. Further, a comparative analysis is undertaken based upon the monitoring data of the tunnel behavior to investigate the influence of uncertainty sources on the tunnel behavior, through which the significance of the new framework can be illustrated.

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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.