This paper studies the influence of support pressure,tunnel slope and tunnel buried depth on ground surface settlement during shield tunnel construction. It is found that supporting pressure and tunnel slope are the main factors affecting ground surface subsidence. In a proper range,increasing the support pressure can effectively control the ground surface subsidence,but beyond a certain threshold,its effect is no longer significant. The change of tunnel slope can affect the shape and size of settling tank. In addition,the change of tunnel buried depth also has an important influence on the ground surface subsidence. The research results of this paper have reference significance for the design and construction of shield tunnel,which is helpful to optimize the construction scheme,reduce the surface settlement and improve the construction safety.
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