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畢研超¹  ,  王建濤^{2 ,4}  ,  宋   佳² ,  趙廣資³

(1 .  濟南市交通工程質量與安全中心 ，山東 濟南 250014;  2.  濟南軌道交通集團有限公司 ，山東 濟南 250014;

3.  中鐵十八局集團第三工程有限公司 ，河北 涿州 072750;  4.  西安交通大學 ，陜西 西安 710049)

摘   要 ：為探討地鐵暗挖隧道穿越強風化閃長巖入巖深度的可靠性 ，基于濟南隧道實例，調研了隧道沉降規律，并利用 Ansys 數值模型與可靠度分析模塊，結合蒙特卡洛抽樣方法，將巖土參數設為隨機變量，分析隧道 嵌入強風化閃長巖最小深度時的地表沉降特征。結果表明： 地表沉降最大垂直位移不超過 25 mm 的概率高達 0. 942 ,  滿足安全標準。該研究為地鐵暗挖隧道穿越復雜地層提供了科學的可靠性評估方法，有助于優化設計與 施工策略，確保隧道結構穩定，降低施工風險，對地鐵工程建設具有重要實踐意義。

關鍵詞： 暗挖隧道 ；強風化閃長巖 ；入巖深度 ；可靠度

中圖分類號：U455 . 4           

文獻標志碼：A            

文章編號： 1005- 8249   (2024)  06- 0063- 05 

DOI:10. 19860/j.cnki.issn1005 - 8249.2024.06.012

 

BI Yanchao¹  ,  WANG Jiantao^2 , 4 ,  SONG Jia² ,  ZHAO Guangzi³

( 1 . Ji ’nan Traffic Engineering Quality and Safety Center ,  Ji ’nan 250014 ,  China;

2. Ji ’nan Rail Transit Group Co. ，Ltd. ，Ji ’nan 250014 ,  China;

3 . China Railway 18th Bureau Group Third Engineering Co. ，Ltd. ，Zhuozhou 072750 ,  China;

4. Xi ’an Jiaotong University ,  Xi ’an 710049 ,  China)

Abstract:The study aims to assess the reliability of the excavation depth for subway tunnels constructed by the cut-and-cover method during their crossing of highly weathered diorite formations. A tunnel in Jinan, China, was used as a case study to investigate tunnel settlement behavior. Ansys numerical modeling and reliability analysis modules, in combination with Monte Carlo sampling techniques, were utilized. Geotechnical parameters were treated as random variables to analyze surface settlement characteristics when the tunnel was embedded to a minimum depth within the highly weathered diorite. The research found that the maximum vertical displacement of surface settlement not exceeding 25mm had a high probability of 0.942, meeting safety standards. A scientific reliability assessment method is provided for subway tunnels constructed by the cut-and-cover method when crossing complex geological formations. It aids in the optimization of design and construction strategies, ensuring tunnel structural stability and reducing construction risks. The study holds significant practical implications for subway engineering projects.

Keywords :  underground tunnel;  strongly weathered diorite;  rock depth;  reliability

作者簡介：畢研超  (1988—) ,  男，碩士，高級工程師，研究方向： 市政工程。

通信作者： 王建濤  (1986—) ,  男，碩士，高級工程師，研究方向： 隧道及地下工程。

收稿日期：2023- 08- 16