ANALYSIS METHOD AND ENGINEERING PRACTICE OF FOUNDATION TREATMENT DESIGN OF CONNECTION SECTION OF HIGHWAYS

Two types of connection between newly built and existing highway sections, the direct and the separate connections, have worse influence of additional subsidence on existing highway by overloading after the connection of new built foundation. Isolating wall which is of low cost and convenient to construct is adopted. The role of isolating wall for connection between Xicheng and Huning highways is numerically simulated by using non linear finite element method far soil mass consolidation. Compution and analysis show that isolating wall can effectively reduce the additional subsidence of Huning highway main line centre reduced after its connection with Xicheng highway.