论文标题：Investigation of deformation mechanisms in intersecting sections of interchange tunnels using the negative Poisson’s ratio anchor excavation compensation method

期刊：Frontiers of Structural and Civil Engineering

作者：Songyuan LIU, Yadong MAO, Zhifeng DU, Liang GAO, Shiding CAO, Manchao HE, Zhigang TAO

发表时间：16 Jan 2025

DOI：10.1007/s11709-025-1179-2

微信链接：点击此处阅读微信文章

文章亮点/Highlights

本研究以深圳Nalong地下互通隧道交叉段为研究对象，采用物理模型试验与数值模拟相结合的方法，系统探讨了开挖及超载条件下交叉段的变形机制。

首先，基于隧道实际几何特征、空间分布及工程地质条件确定了最优相似比，建立了交叉段物理模型。其次，依据开挖补偿理论，采用缩尺负泊松比（NPR）锚杆进行开挖支护，通过隧道应力-应变、位移及NPR锚杆轴力分析，揭示了开挖过程中隧道应力重新分布特征。随后，开展隧道超载试验，阐明交叉段围岩破坏机制。最后，通过数值模拟对比验证试验结果，探究了深圳Nalong地下互通隧道交叉段相似物理模型在开挖支护与超载条件下的变形机理及损伤模式。研究验证了NPR锚杆在交叉隧道的支护效果。

该研究为类似工程背景的隧道开挖与支护设计提供了理论依据和实践指导。

开挖阶段围岩变形过程：（a）上部隧道A期;（b）下层隧道A级;（c）上部隧道阶段B;（d）下隧道阶段B;（e）弓肋收缩倾向;（f）上部隧道C级;（g）下隧道阶段C

摘要/Abstract

The study focused on the intersecting section of the Nalong Underground Interchange Tunnel in Shenzhen and investigated the deformation mechanism of the intersecting section under excavation and overloading conditions using physical model tests and numerical simulation methods. First, the optimal similarity ratio was determined based on the tunnel’s actual geometric characteristics, spatial distribution, and engineering geological conditions. A physical model of the intersecting section was then established. Secondly, following the excavation compensation theory, the intersecting section was excavated and supported using scaled Negative Poisson’s Ratio (NPR) anchor cables. The analysis of tunnel stress−strain, displacement, and NPR anchor cable axial force revealed the stress redistribution characteristics of the tunnel during excavation. Subsequently, the tunnel underwent overloading tests to reveal the surrounding rock failure mechanism of the intersecting section. Finally, numerical simulations were used to compare and verify the test results. The deformation mechanism and damage mode of the similar physical model of the intersecting section of Shenzhen Nanlong Underground Interchange Tunnel under the condition of excavation support and overloading are investigated. The support effect of NPR anchors in the intersection tunnel is verified. The study provides a theoretical basis and practical guidance for the design of tunnel excavation and support with similar engineering background.

关键词/Keywords

interchange tunnel; excavation compensation method; negative Poisson’s ratio anchors; deformation mechanism

引用信息/Citation Information

Songyuan LIU, Yadong MAO, Zhifeng DU, Liang GAO, Shiding CAO, Manchao HE, Zhigang TAO. Investigation of deformation mechanisms in intersecting sections of interchange tunnels using the negative Poisson’s ratio anchor excavation compensation method. Front. Struct. Civ. Eng., 2025, 19(5): 742–759 https://doi.org/10.1007/s11709-025-1179-2

全文下载 Full paper access

获取全文

https://doi.org/10.1007/s11709-025-1179-2

《前沿》系列英文学术期刊

由教育部主管、高等教育出版社主办的《前沿》（Frontiers）系列英文学术期刊，于2006年正式创刊，以网络版和印刷版向全球发行。系列期刊包括基础科学、生命科学、工程技术和人文社会科学四个主题，是我国覆盖学科最广泛的英文学术期刊群，其中12种被SCI收录，其他也被A&HCI、Ei、MEDLINE或相应学科国际权威检索系统收录，具有一定的国际学术影响力。系列期刊采用在线优先出版方式，保证文章以最快速度发表。

中国学术前沿期刊网

http://journal.hep.com.cn