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高民富

（ 鄭州地鐵集團有限公司 ，河南 鄭州 450000)

摘   要 ：非對稱異性隧道聯絡通道掘進時極易發生變形風險 ， 因此對非對稱異性隧道聯絡通道采取冷凍法加固施工技術。利用ANSYS軟件 ，構建非對稱異性隧道聯絡通道及其地層情況的三維模型 ，模擬不同冷凍天數、冷凍壁厚度 、冷凍壁工況狀以及冷凍溫度下 ，聯絡通道的變形規律與穩定情況 ，并優化施工方案。結果表明：經冷凍法處理后的土體表現出良好的凍結效果 ，土體強度較高 ，掘進時土體不易塌陷 ；冷凍天數越長 ，位移變  化量越小 ；土體冷凍壁較厚且全冷凍壁工況能夠獲得更加良好的加固效果 ；冷凍溫度越低 ，聯絡通道越穩定。

關鍵詞：非對稱 ；異性隧道 ；聯絡通道 ；冷凍法施工 ；ANSYS 有限元 ；應力變化

中圖分類號：TU472. 9    

文獻標志碼：A    

文章編號：1005- 8249   (2024)  03- 0157- 06 

DOI:10. 19860/j.cnki.issn1005 - 8249.2024.03 .030

 

GAO Minfu

(Zhengzhou Metro Group Co. ，Ltd. ，Zhengzhou  450000 ,  China)

Abstract : The risk of deformation is very easy to occur in the tunnel tunnel , so the freezing method is adopted to strengthen the tunnel tunnel. ANSYS software is used to build a three - dimensional model of the asymmetric tunnel contact channel and its formation conditions , simulate the deformation rule and stability of the contact channel under different freezing days , freezing wall thickness , freezing wall condition and freezing temperature , and optimize the construction scheme. The results show that the soil treated by the freezing method has a good freezing effect , the soil strength is high , and the soil is not easy to collapse during excavation.  The longer the freezing days ,  the  smaller the  displacement change;  better reinforcement effect can be obtained under the condition of thicker frozen wall and full frozen wall; the lower the freezing temperature is , the more stable the communication channel is.

Keywords : asymmetry; opposite sex tunnel; contact channel; freezing method construction; ANSYS finite element; stress changes

作者簡介： 高民富  (1972—) ,   男 ，本科 ， 高級工程師 ，研 究方向：城市軌道交通施工和運營安全等。

收稿日期：2022- 10- 08