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孫博濤^1 , 2 ,  陳家征^1 , 2 ,   李   忠^1 , 2 ,  韓   煬^1 , 2

( 1 .  石家莊鐵道大學 土木工程學院 ，河北 石家莊 050043 ;

2.  道路與鐵道工程安全保障省部共建教育部重點實驗室 ，河北 石家莊 050043)

摘   要 ：為研究淺埋雙側偏壓小凈距隧道在不同影響因素下的圍巖壓力變化規律， 以朝陽隧道為工程背景，采用 FLAC 3D 數值模擬軟件，對淺埋雙側偏壓小凈距隧道在不同地表坡度、隧道埋深和隧道凈距下的圍巖位移場和塑性區的變化規律進行分析。結果表明： 隨著地表坡度和隧道埋深的不斷增大， 圍巖位移和塑性區不斷增大；隨著隧道凈距不斷增大，圍巖豎向位移呈現先增大再減小最后增大的變化，水平位移不斷增大；當隧道凈距較小時，隧道周圍的塑性區域較大，凈距增大時則相反。

關鍵詞：雙側偏壓 ；小凈距隧道 ；地表坡度 ；埋深 ；凈距 ；分析指標

中圖分類號：U418 . 5             

文獻標志碼：A            

文章編號： 1005- 8249  (2024)  05- 0050- 09

DOI:10. 19860/j.cnki.issn1005 - 8249.2024.05 .010

SUN Botao^1 , 2 ,  CHEN Jiazheng^{1 , 2}  ,  LI Zhong^{1 , 2}  ,  HAN Yang^{1 , 2}

(1 . School of Civil Engineering ,  Shijiazhuang Tiedao University ,  Shijiazhuang 050043 ,  China;

2. The Ministry of Education Jointly Established the Key Laboratory of Road and Railway Engineering

Safety and Security ,  Shijiazhuang 050043 ,  China)

Abstract:In order to study the variation law of surrounding rock pressure in shallow buried double sided bias small spacing tunnels under different influencing factors, taking Chaoyang Tunnel as the engineering background, using FLAC3D numerical simulation software, the variation law of surrounding rock displacement field and plastic zone in shallow buried double sided bias small spacing tunnels under different surface slopes, tunnel burial depths, and tunnel clearance was analyzed. The research results show that with the continuous increase of surface slope and tunnel burial depth, the displacement and plastic zone of surrounding rock continue to increase, while with the continuous increase of tunnel clearance, the vertical displacement of surrounding rock first increases, then decreases, and finally increases, and the horizontal displacement continues to increase.When the clear distance of the tunnel is small, the plastic area around the tunnel is larger,and the opposite is true when the clear distance is increased.

Keywords:bilateral bias; small clear distance tunnel; surface slope; burial depth; clear distance; analysis indicators

作者簡介：孫博濤(1998—) ,  男，碩士研究生，研究方向：地質災害超前預報及隧道地下工程。

通信作者：李   忠(1968—) ,  男，博士，教授，研究方向：地質災害超前預報及隧道地下工程。

收稿日期：2023-03-24