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高民富

（ 郑州地铁集团有限公司 ，河南 郑州 450000)

摘   要 ：非对称异性隧道联络通道掘进时极易发生变形风险 ， 因此对非对称异性隧道联络通道采取冷冻法加固施工技术。利用ANSYS软件 ，构建非对称异性隧道联络通道及其地层情况的三维模型 ，模拟不同冷冻天数、冷冻壁厚度 、冷冻壁工况状以及冷冻温度下 ，联络通道的变形规律与稳定情况 ，并优化施工方案。结果表明：经冷冻法处理后的土体表现出良好的冻结效果 ，土体强度较高 ，掘进时土体不易塌陷 ；冷冻天数越长 ，位移变  化量越小 ；土体冷冻壁较厚且全冷冻壁工况能够获得更加良好的加固效果 ；冷冻温度越低 ，联络通道越稳定。

关键词：非对称 ；异性隧道 ；联络通道 ；冷冻法施工 ；ANSYS 有限元 ；应力变化

中图分类号：TU472. 9    

文献标志码：A    

文章编号：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

作者简介： 高民富  (1972—) ,   男 ，本科 ， 高级工程师 ，研 究方向：城市轨道交通施工和运营安全等。

收稿日期：2022- 10- 08