Abstract:With the acceleration of urban development, more and more attention has been paid to the development of underground space. However, the surrounding environment of the foundation pit has become more and more complex, and the deformation requirements of the foundation pit have become more stringent. Taking the foundation pit of air shaft in the subway sections in Hangzhou as an example, by analyzing the lateral displacement and deformation under the servo steel bracing, it is concluded that the lateral deformation of the foundation pit under the servo steel bracing is only half of the lateral deformation of the foundation pit under the prestressed steel bracing, and the lateral deformation of the foundation pit is closely related to the vertical layout of the steel bracing. At the same time, by analyzing the ground settlement data under servo steel bracing and ordinary bracing, it is proved that servo steel bracing has a good effect on controlling the surrounding environment, which can provide reference for deformation control of similar foundation pits in Hangzhou.
