The traditional tunnel support technology has some problems,such as poor construction quality,slow construction efficiency and poor working environment.In the construction of tunnel with weak surrounding rock,,large deformation often occurs because the support is not timely.Therefore,the use of prefabricated support technology has become the mainstream direction of current research.Based on Xueqiaoqiao Subway Station project,this paper carried out field test research on tunnel prefabricated support structure.The deformation characteristics of supporting structure during construction,the influence of construction process on ground settlement and construction efficiency are analyzed.The results show that the change of ground settlement during construction is less than 3.0 mm,and the structural deformation during construction is less than 8.0 mm,which indicated that the bearing capacity of corrugated steel support structure can meet the requirements of tunnel safety support,the above research results show that corrugated steel is feasible as a support structure for small span tunnels in urban infrastructure dense areas,and has the value of popularization and application.
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