THE INFLUENCE OF DEEP FOUNDATION PIT EXCAVATION UNLOADING ON ADJACENT TUNNEL DEFORMATION AND THE ANALYSIS OF SERVO CONTROL EFFECT
This paper accurately simulates and analyzes the influence of the underground foundation pit on the out-of-pit tunnel deformation with and without the servo control by digital model based on finite element method.The results show that after adding servo control,the deformation of the tunnel is reduced,and the overall horizontal and vertical displacements are significantly reduced,in which the maximum horizontal displacement value is reduced by 55.5％and the maximum vertical displacement value is reduced by 56％,and the axial servo system can realize the fine active control of lateral deformation of the enclosure structure.
deep foundation pittunnel deformationfinite element modelservo control
NETL
NSTL
万方数据
