The Chegongmiao subway station is adjacent to the first subway of Shenzhen and Fengshengding shopping street

which is on the Shenzhen 11th subway to be constructed.To determine the design scheme feasibility and assure the station structure safety and operation normality

the 3D finite element method is investigated to simulate the different construction technologies and deformation of exterior-protected construction.By simulating the stresses of subway station under sheltered reverse excavation and open excavation

the effect of different construction methods on subway station is analyzed.The engineering measures to reduce the influence of construction are supported for determining the construction plan.It can be found that:（1） two kinds of construction technology in the subway station construction process can well reduce the underground water level

but the gap between pore water pressure of soil in the foundation and around the foundation after the sheltered reverse excavation is completed

is bigger than those of the open excavation obviously.The leaning is caused extremely easily adjacent to the underground structure.（2） The lateral deformation of building under sheltered reverse excavation is relatively large.（3） During the foundation construction process

the first subway station structure should be supported and monitored to prevent the large deformation of the structure