In recent years,China's urban underground rail transit network system has become more and more perfect,shield tunnel has become an important construction method for urban subway engineering construction,and the stratum conditions are more complex.If the shield construction technology is not used reasonably,the stratum deformation control is not in place,which will threaten the safety of the subway tunnel.Taking a city subway project as an example,this paper analyzes the key points of tunnel shield technology from the aspects of shield starting,shield tunneling and shield reception,and combined with the on-site monitoring results,the technology ensures the quality and safety of subway tunnel construction,which can provide guidance and reference for subsequent similar projects.
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