Analysis on the Influence of River Widening Construction on Underlying Subway Shield Tunnel
In order to study the influence of river excavation on the underlying subway shield tunnel,taking the river widening construction of Liangxiang Road Interchange Project on East-West Expressway in Yuhang District as an example,this paper analyzes the effect of foundation reinforcement and anti-uplift measures on controlling the deformation of subway tunnel.Combined with the engineering geological conditions and the deformation control requirements of subway protection,it puts forward a subway protection scheme of using MJS piles to reinforce the soil above the tunnel and setting up anti-uplift structure system,making full use of the spatiotemporal effect in the earthwork excavation,and adopting block-jumping excavation method.Through the 3D finite element numerical simulation of the river excavation process,it is shown that the above protection measures can effectively constrain the deformation of the foundation and the tunnel,and can meet the safety requirements of the subway operation.
river excavationshield tunnelfoundation reinforcementdeformation controlnumerical analysis
NETL
NSTL
万方数据
维普
