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劉   淵 ，郭鵬飛

（ 廣西路橋工程集團有限公司 ，廣西 南寧 530200)

摘   要 ：雙隧道的設計 、開挖和建設一直以來都是國內外學者研究的重點話題 ，影響雙隧道的影響因素很 多 ，每一種因素都有可能導致隧道的開挖出現不可預見的問題 。因此采用室內巖石力學試驗 、FLAC 3D 數值模 擬以及決策理論等技術手段對常見的影響雙隧道穩定性的拱頂曲率 、雙隧道間距 、隧道仰拱曲率 、開挖巖層內 聚力以及隧道的長度等 5 種影響因素進行研究分析 ，并得出影響雙隧道開挖時的最敏感因素 。結果表明： 隨著 隧道拱頂曲率的增加 ，其拱頂位移 、最大主應力以及最大垂直應力均呈下降趨勢 ，其中部巖柱的最大垂直應力 呈上升趨勢 ；雙隧道間距以及其他 3 種影響因素的改變 ，均會對雙隧道的開挖產生各自不同的影響 。同時在此 基礎上 ，采用決策理論思想構造判斷矩陣 ，對 5 種影響雙隧道開挖的因素進行了敏感性分析 ，并根據最大隸屬 度原則確定了拱頂曲率的設計為影響雙隧道穩定性的最敏感因素 。研究結果為今后雙隧道的設計 、開挖 、科研以及檢測方面提供了科學依據。

關鍵詞 ：力學試驗 ；雙隧道 ；FLAC 3D 數值模擬 ；影響因素 ；敏感性分析   

中圖分類號 ：U458           

文獻標志碼 ：A            

文章編號 ：1005- 8249  (2024)   01- 0107- 07

DOI : 10. 19860/j . cnki . issn1005- 8249. 2024. 01 . 019

 

 

LIU Yuan ,  GUO Pengfei

( Guangxi Road and Bridge Engineering Group Co. ，Ltd. ，Nanning 530200 ,   China)

Abstract：The design, excavation, and construction of double tunnels have always been a key topic of research for scholars at home and abroad. There are many factors that affect double tunnels, and each factor may lead to unforeseeable problems in tunnel excavation. Therefore, this article uses indoor rock mechanics experiments, FLAC3D numerical simulation, and decision theory to study and analyze five common influencing factors on the stability of double tunnels, including arch curvature, double tunnel spacing, tunnel arch curvature, excavation rock cohesion, and tunnel length. The most sensitive factors affecting the excavation of double tunnels are identified. The research results show that as the curvature of the tunnel arch increases, its arch displacement, maximum principal stress, and maximum vertical stress all show a downward trend, while the maximum vertical stress of the central rock column shows an upward trend; The changes in the spacing between double tunnels and the other three influencing factors will have different impacts on the excavation of double tunnels. On this basis, a judgment matrix was constructed using decision theory, and sensitivity analysis was conducted on five factors that affect the excavation of double tunnels. Based on the principle of maximum membership degree, the design of arch curvature was determined as the most sensitive factor affecting the stability of double tunnels. The research results provide scientific basis for the design, excavation, scientific research, and testing of double tunnels in the future.

Keywords: mechanical test;double tunnel;FLAC3D numerical simulation;influence factor;Sensitivity analysis

作者簡介 ：劉淵  (1982—) ,  男 ，本科 ，高級工程師 ，主要研究方向 ：公路市政工程管理。

通信作者 ：郭鵬飛  (1991 —) ,  男 ，博士 ，副教授 ，主要研究方向 ：深部巖體災害防控及隧道工程。

收稿日期 ：2023- 01 - 10