Design and deformation control of excavation support project close to a subway station

For the deep excavation with a depth of 15 m close to a subway station in Beijing, the design and deformation control measures for its support are proposed. Numerical simulation is performed by means of the FLAC3D software based on the theory of finite difference to analyze the deformation of the supporting system during the design stage. The actual deformations of the supporting system during the construction stage and service period are monitored. The results of the numerical simulation and actual monitoring show that the maximum deformation on the top of the supporting structure is below the allowable value of the relevant technical code. The proposed design and deformation control measures for this project can be referenced for excavation support projects under similar conditions.